New Power Management Products

LTC4162-F: 35V/3.2A Multicell LiFePO4 Step-Down Battery Charger with PowerPath and I2C Telemetry

An advanced monolithic synchronous step-down switching battery charger and PowerPath manager that seamlessly manages power distribution between input sources (wall adapters, backplanes, solar panels) and a rechargeable lithium-iron phosphate battery. Features a high resolution measurement system for telemetry and an I2C port for configuration.

Features

• LiFePO4 Battery Charger with Termination
• Wide Charging Input Voltage Range: 4.5V to 35V
• High Efficiency Synchronous Operation
• 16-Bit Digital Telemetry System Monitors VBAT, IBAT, RBAT, TBAT, TDIE, VIN, IIN, VOUT
• Charges 1-9 Lithium-Iron Phosphate Cells
• Input Undervoltage Charge Current Limit Loop
• Input MPPT for Solar Panel Inputs
• Input Current Limit Prioritizes System Load Output
• Low Loss PowerPath
• Instant-On Operation with Discharged or Missing Battery
• JEITA Temperature Controlled Charging
• Pin Compatible with Li-Ion and SLA Versions

Applications

• Medical Instruments
• USB-C Power Delivery
• Industrial Handhelds
• Ruggedized Notebooks
• Tablet Computers

Diagrams and Performance

Top View Pinout: Describes the pin connections for the UFD PACKAGE 28-LEAD (4mm × 5mm) PLASTIC QFN.

Charging Efficiency vs Input Voltage by Cell Count: A graph showing efficiency (%) on the Y-axis versus Input Voltage (V) on the X-axis, with curves for 1 to 9 cells at ICHARGE = 2.5A. Efficiency decreases as input voltage decreases, particularly for higher cell counts.

LTC4162-L: 35V/3.2A Multicell Lithium-Ion Step-Down Battery Charger with PowerPath and I2C Telemetry

An advanced monolithic synchronous step-down switching battery charger and PowerPath manager for Li-Ion/Polymer batteries. Similar functionality to the LTC4162-F but optimized for 1-8 Lithium-Ion/Polymer cells.

Features

• Li-Ion/Polymer Battery Charger with Termination
• Wide Charging Input Voltage Range: 4.5V to 35V
• High Efficiency Synchronous Operation
• 16-Bit Digital Telemetry System Monitors VBAT, IBAT, RBAT, TBAT, TDIE, VIN, IIN, VOUT
• Charges 1-8 Lithium-Ion/Polymer Cells
• Input Undervoltage Charge Current Limit Loop
• Input MPPT for Solar Panel Inputs
• Input Current Limit Prioritizes System Load Output
• Low Loss PowerPath
• Instant-On Operation with Discharged or Missing Battery
• JEITA Temperature Controlled Charging
• Pin Compatible with LiFePO4 and SLA Versions

Applications

• Medical Instruments
• USB-C Power Delivery
• Industrial Handhelds
• Ruggedized Notebooks
• Tablet Computers

Diagrams and Performance

Top View Pinout: Describes the pin connections for the UFD PACKAGE 28-LEAD (4mm × 5mm) PLASTIC QFN.

Charging Efficiency vs Input Voltage by Cell Count: A graph similar to the LTC4162-F, showing efficiency (%) versus Input Voltage (V) for 1 to 8 cells at ICHARGE = 2.5A.

LTC4162-S: 35V/3.2A Lead-Acid Step-Down Battery Charger with PowerPath and I2C Telemetry

An advanced monolithic synchronous step-down switching battery charger and PowerPath manager for Lead-Acid batteries. Supports 6V, 12V, 18V, and 24V Lead-Acid batteries.

Features

• Lead-Acid Battery Charger with Absorb and Equalize
• Wide Charging Input Voltage Range: 4.5V to 35V
• High Efficiency Synchronous Operation
• 16-Bit Digital Telemetry System Monitors VBAT, IBAT, RBAT, TBAT, TDIE, VIN, IIN, VOUT
• Charges 6V, 12V, 18V and 24V Lead-Acid Batteries
• Input Undervoltage Charge Current Limit Loop
• Input MPPT for Solar Panel Inputs
• Input Current Limit Prioritizes System Load Output
• Low Loss PowerPath
• Instant-On Operation with Discharged or Missing Battery
• Temperature Controlled Charging
• Pin Compatible with Li-Ion and LiFePO4 Versions

Applications

• Medical Instruments
• USB-C Power Delivery
• Industrial Handhelds
• Ruggedized Notebooks
• Tablet Computers

Diagrams and Performance

Top View Pinout: Describes the pin connections for the UFD PACKAGE 28-LEAD (4mm × 5mm) PLASTIC QFN.

Charging Current vs Battery Voltage: A graph showing Charge Current (A) on the Y-axis versus Battery Voltage (V) on the X-axis, illustrating CC, Absorb, and Equalize charging phases for a 12V battery with VIN = 18V.

LT3922-1: 36V, 2.3A Synchronous Step-Up LED Driver with 25,000:1 PWM Dimming

A monolithic, synchronous, step-up DC/DC converter for driving LED strings. It offers precise LED current regulation, high PWM dimming ratios, and low EMI via its Silent Switcher architecture.

Features

• ±2% LED Current Regulation
• ±2% Output Voltage Regulation
• 25,000:1 PWM Dimming at 100Hz
• 128:1 Internal PWM Dimming
• Spread Spectrum Frequency Modulation for Reduced EMI
• Silent Switcher® Architecture for Low EMI
• Operates in Boost, Buck Mode and Buck-Boost Mode
• 2.8V to 36V Input Voltage Range
• Up to 34V LED String Voltage
• 2.3A, 40V Internal Switches
• 200kHz to 2MHz Switching Frequency with SYNC
• Analog or Duty Cycle LED Current Control
• Open/Short LED Protection and Fault Indication
• Thermally Enhanced 28-Lead (4mm × 5mm) QFN

Applications

• Automotive and Industrial Lighting
• Machine Vision

Diagrams and Performance

Top View Pinout: Describes the pin connections for the UFD PACKAGE 28-LEAD (4mm × 5mm) PLASTIC QFN.

30V, 333mA Boost LED Driver with 25,000:1 PWM Dimming: A schematic shows a typical application circuit with VIN, SW, BST, VOUT, GND, EN/UVLO, etc., connected to external components like an inductor (L1), capacitors, and resistors.

Infinite Persistence: A waveform graph shows VIN, VPWM, and ILED over time, illustrating the PWM dimming capability.

LT3033: 3A, 0.95V to 10V, Very Low Dropout Linear Regulator with Programmable Current Limit

A very low dropout voltage (VLDOTM) linear regulator operating from a single input supply down to 0.95V, providing 3A output current with 95mV typical dropout voltage. It is suitable for low input voltage to low output voltage applications, offering comparable efficiency to switching regulators.

Features

• Single Supply VIN Range: 0.95V to 10V
• Dropout Voltage: 95mV Typical
• Output Current: 3A
• Adjustable Output Voltage: 200mV to 9.7V
• Single Capacitor Soft-Starts Reference and Lowers Output Noise
• Stable with Low ESR, Ceramic Output Capacitors
• 0.075% Typical Load Regulation from 1mA to 3A
• Quiescent Current: 1.9mA Typical
• Quiescent Current in Shutdown: 22µA Typical
• Power Good (PWRGD) Flag (Status Valid in Shutdown)
• Current Limit Protection with Foldback
• Programmable Current Limit
• Output Current Monitor: IOUT/2650
• Thermal Limiting with Hysteresis
• Reverse Battery, Reverse Output, and Reverse Current Protection
• 20-Lead 3mm × 4mm QFN Package

Applications

• High Efficiency Linear Regulators
• Battery-Powered Systems
• Logic Supplies
• Post Regulator for Switching Supplies
• Wireless Modems
• FPGA Core Supplies

Diagrams and Performance

Top View Pinout: Describes the pin connections for the UDC PACKAGE 20-LEAD (3mm × 4mm) QFN package.

Minimum Input Voltage vs Temperature: A graph showing Minimum Input Voltage (V) on the Y-axis versus Temperature (°C) on the X-axis, for IL = 3A.

1.2V to 0.9V, 3A VLDO Regulator: A schematic illustrates a typical application circuit with VIN, IN, OUT, SHDN, ADJ, PWRGD, IMON, ILIM, REF/BYP pins connected to external components.

LTM4678: Dual 25A or Single 50A µModule Regulator with Digital Power System Management

A dual 25A or single 50A step-down µModule (power module) DC/DC regulator featuring remote configurability and telemetry-monitoring of power management parameters over PMBus. It integrates digitally programmable analog control loops, precision mixed-signal circuitry, EEPROM, power MOSFETs, and inductors.

Features

• Dual Digitally Adjustable Analog Loops with Digital Interface for Control and Monitoring
• Wide Input Voltage Range: 4.5V to 16V
• Output Voltage Range: 0.5V to 3.3V
• ±0.5% Maximum DC Output Error Over Temperature
• ±5% Current Readback Accuracy
• Sub-Milliohm DCR Current Sensing
• Integrated Input Current Sense Amplifier
• 400kHz PMBus-Compliant I2C Serial Interface
• Supports Telemetry Polling Rates up to 125Hz
• Integrated 16-Bit ADC
• Constant Frequency Current Mode Control
• Parallel and Current Share Up to 250A
• Readable Data: Input and Output Voltages, Currents, Temperatures, Running Peak Values, Uptime, Faults and Warnings, Onboard EEPROM Fault Log Record
• Writable Data and Configurable Parameters: Output Voltage, Voltage Sequencing and Margining, Digital Soft-Start/Stop Ramp, Program Analog Loop, OV/UV/OT, UVLO, Frequency and Phasing

Applications

• System Optimization, Characterization and Data Mining in Prototype, Production and Field Environments

Diagrams and Performance

Top View Pinout: Describes the pin connections for the BGA PACKAGE 144-LEAD (16mm × 16mm × 5.86mm).

Performance Graphs: Illustrate Input Current (IIN), Output Voltage (VOUT), Output Current (IOUT), and Channel Temperature readbacks over time during load pattern tests, showing telemetry capabilities.

LTM4686/LTM4686-1: Ultrathin Dual 10A or Single 20A µModule Regulator with Digital Power System Management

An ultrathin dual 10A (12A Peak) or single 20A (24A Peak) step-down µModule (micromodule) DC/DC regulator with 39ms turn-on time. Features remote configurability and telemetry-monitoring over PMBus.

Features

• Dual, Fast, Analog Loops with Digital Interface for Control and Monitoring
• Wide Input Voltage Range: 4.5V to 17V Standalone, 2.375V to 17V with Aux 5V Bias (LTM4686-1)
• Output Voltage Range: 0.5V to 3.6V
• ±0.5% Maximum DC Output Error Over Temperature
• 10A DC Typical, 12A Peak Output Current, per Channel
• ±5% Current Readback Accuracy at 10A Load
• 400kHz PMBus-Compliant I2C Serial Interface
• Integrated 16-Bit ADC
• Supports Telemetry Polling Rates Up to 125Hz
• Constant Frequency Current Mode Control
• Parallel and Current Share Multiple Modules
• All 7-Bit Slave Addresses Supported
• Drop-In Pin-Compatible to Dual 9A LTM4675 and Dual 13A LTM4676A and Dual 18A LTM4677
• 16mm × 11.9mm × 1.82mm LGA Package
• Readable Data: Input and Output Voltages, Currents, Temperatures, Running Peak Values, Uptime, Faults and Warnings, Onboard EEPROM Fault Log Record with ECC
• Writable Data and Configurable Parameters: Output Voltage, Voltage Sequencing and Margining, Digital Soft-Start/Stop Ramp, OV/UV/OT, UVLO, Frequency and Phasing

Applications

• System Optimization, in Prototype and Production

Diagrams and Performance

Top View Pinout: Describes the pin connections for the LGA PACKAGE 108-LEAD (16mm × 11.9mm × 1.82mm).

Performance Graphs: Show Output Voltage (VOUT), Output Current (IOUT), Input Current (IIN), and Channel Temperature readbacks over time during load pattern tests, demonstrating telemetry and margining capabilities.

LTM8002: 40VIN, 2.5A Silent Switcher µModule Regulator

A complete step-down switch mode power supply in a compact package, featuring low noise Silent Switcher architecture. It includes the switching controller, power switches, inductor, and all support components.

Features

• Complete Step-Down Switch Mode Power Supply
• Low Noise Silent Switcher Architecture
• Wide Input Voltage Range: 3.4V to 40V
• Wide Output Voltage Range: 0.97V to 18V
• Wide Temperature Range: –40°C to 150°C (H-Grade)
• 2.8A Continuous for 5VOUT, 12VIN, 2MHz at 105°C (H-Grade)
• 3.5A Peak
• FMEA Compliant Pinout
• Selectable Switching Frequency: 200kHz to 3MHz
• External Synchronization
• Low Quiescent Current: 25µA (5VOUT)
• Programmable Soft-Start
• Tiny, Low Profile 6.25mm × 6.25mm × 2.22mm BGA Package

Applications

• Automotive Battery Regulation
• Power for Portable Products
• Distributed Supply Regulation
• Industrial Supplies
• Wall Transformer Regulation

Diagrams and Performance

Top View Pinout: Describes the pin connections for the BGA PACKAGE 49-LEAD (6.25mm × 6.25mm × 2.22mm).

Derating, H-Grade, BIAS = 5V, DC2501A Demo Board: A graph shows Maximum Load Current (A) on the Y-axis versus Ambient Temperature (°C) on the X-axis for fSW = 2MHz and 12VIN.

5VOUT from 7VIN to 40VIN Step-Down Converter: A schematic illustrates a typical application circuit with VIN, RUN, RT, LTM8002, VOUT, BIAS, GND, SYNC, FB pins connected to external components.

LTM8074: 40VIN, 1.2A Silent Switcher µModule Regulator

A 40VIN, 1.2A continuous, 1.75A peak, step-down µModule (power module) regulator featuring Silent Switcher architecture for minimized EMI. It includes the switching controller, power switches, inductor, and all support components.

Features

• Low Noise Silent Switcher Architecture
• CISPR 22 Class B Compliance
• Wide Input Voltage Range: 3.2V to 40V
• Wide Output Voltage Range: 0.8V to 12V
• 1.2A Continuous Output Current at 24VIN, 5VOUT, TA = 85°C
• 1.75A Peak Output Current at 3.3VOUT
• Selectable Switching Frequency: 200kHz to 2.2MHz
• External Synchronization
• Configurable as an Inverter
• 4mm × 4mm × 1.82mm BGA Package

Applications

• Automotive Battery Regulation
• Power for Portable Products
• Distributed Supply Regulation
• Industrial Supplies
• Wall Transformer Regulation

Diagrams and Performance

Top View Pinout: Describes the pin connections for the BGA PACKAGE 25-LEAD (4mm × 4mm × 1.82mm).

Derating, VOUT = 3.3V DC2753A Demo Board, VEMI = 24V: A graph shows Amplitude (dBuV/m) on the Y-axis versus Frequency (MHz) on the X-axis, illustrating EMI performance compared to CISPR22 Class B limits.

3.3VOUT from 4.5VIN to 40VIN Step-Down Converter: A schematic shows a typical application circuit with VIN, RUN, RT, LTM8074, VOUT, GND, SYNC, FB pins connected to external components.

LTC4292/LTC4291: 4-Port IEEE 802.3bt PoE PSE Controller

A 4-port power sourcing equipment (PSE) controller chipset designed for IEEE 802.3bt Type 3 and 4 compliant Power over Ethernet (PoE) systems. It supports Type 1, 2, 3, and 4 PDs and offers low power path dissipation and electrical isolation.

Features

• Four PSE Ports
• Two Power Channels Per Port
• Fully Compliant IEEE 802.3bt Type 3 and 4 PSE
• Compliant Support for Type 1, 2, 3, and 4 PDs
• Low Power Path Dissipation per Channel
• 150m Sense Resistance
• 30m or Lower MOSFET RDS(ON)
• Chipset Provides Electrical Isolation
• Eliminates Optos and Isolated 3.3V Supply
• Very High Reliability Multipoint PD Detection
• Connection Check Distinguishes Single-Signature and Dual-Signature PDs
• Continuous, Dedicated Per-Port Power and Current Monitoring
• Per-Port Power Policing
• 1MHz I2C Compatible Serial Control Interface
• Pin or I2C Programmable PD Power Up to 71.3W
• Available in a 40-Lead 6mm × 6mm (LTC4292) and 24-Lead 4mm × 4mm (LTC4291) QFN Package

Applications

• PoE PSE Switches/Routers
• PoE PSE Midspans

Diagrams and Performance

Top View Pinouts: Describes the pin connections for the UJ PACKAGE 40-LEAD (6mm × 6mm) PLASTIC QFN (LTC4292) and UF PACKAGE 24-LEAD (4mm × 4mm) PLASTIC QFN (LTC4291).

System Diagram: Illustrates the connection of LTC4291 and LTC4292 with external components for a 1000BASE-T network, showing power channels and isolation.

LTC4041: 2.5A Supercapacitor Backup Power Manager

A complete supercapacitor backup system for 2.9V to 5.5V supply rails. It contains a high current step-down DC/DC converter to charge supercapacitors and operates in reverse as a step-up regulator to backup the system when input power is unavailable.

Features

• 2.5A Step-Down Supercapacitor Charger and 2.5A Step-Up Backup Supply
• 6.5A Switches for 2.5A Backup from One Supercapacitor or Two in Series
• Input Current Limit Prioritizes Load over Charge Current
• Input Disconnect Switch Isolates Input During Backup
• Automatic Seamless Switch-Over to Backup Mode
• Internal Supercapacitor Balancer (No External Resistors)
• Programmable Charge Current and Charge Voltage
• Input Power Fail Indicator
• System Power Good Indicator
• Optional OVP Circuitry Protects Device to >60V
• Constant Frequency Operation
• Thermally Enhanced 24-Lead 4mm × 5mm QFN Package

Applications

• Ride-Through "Dying Gasp" Supplies
• High Current Ride-Through 3V to 5V UPS
• Power Meters/Industrial Alarms
• Servers/Solid State Drives

Diagrams and Performance

Top View Pinout: Describes the pin connections for the UFD PACKAGE 24-LEAD (4mm × 5mm) PLASTIC QFN.

Complete Backup Event with a Single 10µF Supercapacitor: A waveform graph shows VSYSGD, VSYS, VIN, and VSCAP over time, illustrating the backup event transition.

Single Supercapacitor 3.3V Backup Application: A schematic illustrates a typical application circuit with VIN, OVSNS, CLN, IGATE, VSYS, BSTFB, PFI, RSTFB, PFO, SW, SYSGD, LTC4041, SCAP, CAPGD, IMON, CAPFLT, CAPFB, CHGEN, BSTEN, GND, CAPSEL, CPF, PROG pins connected to external components.

LTC7862: 140V High Efficiency Switching Surge Stopper

A high efficiency switching surge stopper that protects loads from high voltage transients. It controls external N-channel MOSFETs to act as a switching DC/DC step-down regulator during overvoltage events, maintaining a safe output voltage.

Features

• VOUT Clamp Stops High Voltage Input Surges
• 100% Duty Cycle Pass-Through Mode During Normal Operation
• Switches During Overvoltage or Overcurrent Transients and Faults and During Start-Up
• High Efficiency Switching Enables Long Duration Surge Protection and High Output Currents
• Wide VIN Range: 4V to 140V (150V Abs Max)
• Adjustable Output Voltage Clamp Up to 60V
• Adjustable Output Overcurrent Protection
• RSENSE or Inductor DCR Current Sensing
• Power Inductor Reduces Input EMI in Normal Mode
• Adjustable Soft-Start for Inrush Current Limiting
• Programmable Fault Timer
• Open-Drain Fault Warning Indicator
• 2.7% Retry Duty Cycle During Faults
• Adjustable Switching Frequency: 50kHz to 900kHz
• Adjustable Input Voltage Turn-On Threshold
• Adjustable Input Overvoltage Lockout Threshold
• 20-Pin 4mm × 5mm QFN and TSSOP Packages

Applications

• Automotive/Avionic/Industrial Surge Protection
• Automotive Load Dump Protection
• Vehicle Power Including ISO7637
• Military Power Including MIL1275

Diagrams and Performance

Top View Pinouts: Describes the pin connections for the FE PACKAGE 20-LEAD PLASTIC TSSOP and UFD PACKAGE 20-LEAD (4mm × 5mm) PLASTIC QFN.

Overvoltage Protector Regulates Output at 28V During VIN Transient: A waveform graph shows VIN/VOUT, SW, WARNB over time, illustrating the output clamping during a high voltage input surge.

28V, 20A with 100V Overvoltage Protection: A schematic illustrates a typical application circuit with VIN, CINA, CINB, SENSE+, SENSE-, SS, VFB, ITH, TMR, FREQ, WARNB, TG, SW, LTC7862, SENSE-, VFB, etc., connected to external components.

ADP5138: Quad, 1A, 5.5V, Synchronous Step-Down Regulators with One RF LDO Regulator

Integrates four high performance synchronous step-down regulators and one low noise radio frequency (RF) low dropout (LDO) regulator. Operates from PVINx input voltages of 3V to 5.5V, with each step-down regulator providing up to 1A and the LDO providing 250mA.

Features

• PVINx Voltage Range: 3V to 5.5V
• Continuous Output Current: Channel 1 to Channel 4 (buck): 1A, Channel 5 (LDO): 250mA
• 3.2 MHz Fixed PWM Switching Frequency
• Synchronization Input Function
• Buck Regulators Run at 90° Out-of-Phase
• Individual Precision Enable Input
• Power-On Reset Output
• Integrated Compensation
• Soft-Start and Power-Up Sequencing Reduce Inrush Current
• Active Output Discharge Switch Function
• Stable with Low ESR Output Ceramic Capacitors
• OVLO, UVM, and UVLO
• TSD Protection
• Qualified for Automotive Applications

Applications

• Automotive
• Industrial and Instrumentation
• DC to DC Point-of-Load Applications

Diagrams and Performance

Top View Pinout: Describes the pin connections for the LFCSP PACKAGE 28-LEAD (4mm × 4mm) LEAD FRAME CHIP SCALE PACKAGE.

Typical Application Circuit: A schematic shows VIN, CAVIN, CIN1-4, ADP5138, AVIN, POR, EN1-5, PVIN1-5, SW1-4, FB1-5, PGND1-4, VOUT1-5, RTOP2, RBOT2, RTOP3, RBOT3, RTOP4, RBOT4, RTOP5, RBOT5, SYNC, GND pins connected to external components.

LTC3372: 60V Low IQ Buck Controller Plus 4-Channel 8A Configurable Buck DC/DCs

A highly flexible multi-output power supply IC including a high voltage (HV) step-down DC/DC switching regulator controller and four low voltage (LV) synchronous buck regulators. The LV regulators can be configured to share eight 1A integrated power stages.

Features

• HV Buck Controller: VIN = 4.5V to 60V, VOUT = 5V/3.3V
• LV Buck Regulators: VINA-H = 2.25V to 5.5V, VOUT1-4 ≥ 0.8V
• 8 × 1A LV Buck Integrated Power Stages, Configurable as 2, 3 or 4 Output Channels
• 8 Unique Output Configurations (1A to 4A Per Channel)
• Low Total No-Load Input Supply Current (IQ): 15µA (HV Controller Only, 5VOUT), 23µA (HV Controller Only, 3.3VOUT), 33µA (HV Controller + One LV Regulator), 9µA (Per Additional LV Regulator Channel)
• 1MHz to 3MHz Operation (HV Runs at 1/6 Frequency)
• Programmable or Synchronizable to External Clock
• Programmable Watchdog and Power-On Reset Delay
• IC Die Temperature Monitor Output
• Thermally Enhanced 48-pin 7mm × 7mm QFN Package

Applications

• Automotive and Industrial Always-On Systems
• General Purpose Multi-Channel Power Supplies

Diagrams and Performance

Top View Pinout: Describes the pin connections for the UK PACKAGE 48-LEAD (7mm × 7mm) PLASTIC QFN.

LV Efficiency vs Output Current: A graph showing Efficiency (%) on the Y-axis versus Output Current (A) on the X-axis, with curves for 1A, 2A, 3A, and 4A bucks at VINA-H = 3.3V, VOUT = 1.8V, fSW = 2MHz.

Low Voltage Buck Regulator Configurations: A table lists configurations based on C1, C2, C3 pins, showing output current distribution for Buck1 through Buck4.

LTC3894: 150V Low IQ Step-Down DC/DC Controller with 100% Duty Cycle Capability

A high voltage step-down DC/DC switching regulator controller that drives a P-channel power MOSFET switch, enabling 100% duty cycle operation. It offers low quiescent current and excellent light load efficiency.

Features

• Wide Operating VIN Range: 4.5V to 150V
• Wide VOUT Range: 0.8V to 60V
• 9µA IQ When Regulating 48VIN to 3.3VOUT
• 16µA IQ When Regulating 12VIN to 3.3VOUT
• Very Low Dropout Operation: 100% Duty Cycle
• Adjustable Input Overvoltage Lockout
• Programmable PGOOD Undervoltage Monitor
• RSENSE or Inductor DCR Current Sensing
• Selectable High Efficiency Burst Mode® Operation or Pulse-Skipping Mode at Light Loads
• Programmable Fixed Frequency: 50kHz to 850kHz
• Phase-Lockable Frequency: 75kHz to 800kHz
• Internal Fixed Soft-Start and External Programmable Soft-Start or Voltage Tracking
• Strong MOSFET Gate Driver with Selectable Undervoltage Lockout Thresholds
• Optional External NMOS for Gate Driver Bias in High Power Applications

Applications

• Automotive and Industrial Power Systems
• Telecommunication Power Systems
• Distributed Power Systems

Diagrams and Performance

Top View Pinout: Describes the pin connections for the FE PACKAGE 20(16)-LEAD PLASTIC TSSOP.

Efficiency and Power Loss vs Load Current: Graphs show Efficiency (%) and Power Loss (mW) on the Y-axis versus Load Current (A) on the X-axis for VIN = 12V and VIN = 24V.

High Efficiency 150V to 5V Step-Down Regulator: A schematic illustrates a typical application circuit with VIN, RUN, GATE, CAP, SENSE+, SENSE·, PGOOD, PGUV, VFB, TRACK/SS, PLLIN/MODE, LTC3894, OVLO, DRVUV/EXTG, EXTS, ITH, GND, FREQ, etc., connected to external components.

LTC7840: 2-Phase Dual Output Nonsynchronous Boost Controller with Hiccup Mode

A dual phase dual output, constant frequency current mode, nonsynchronous boost controller that drives N-channel power MOSFETs. It supports a wide input voltage range and can be configured for dual phase single/dual output operation, SEPIC, and flyback topologies.

Features

• Wide VIN Range: 5.5V to 60V
• Configurable for Dual Phase Single/Dual Output Operation
• Peak Current Mode Control with Smooth Quadratic Slope Compensation and Dynamic Slope Recovery
• Adjustable Max Duty Cycle
• Adjustable Min On-Time
• Hiccup Mode for Overcurrent Protection
• Adjustable Current Sense Limit
• Output Overvoltage Protection
• Programmable and Phase-Lockable Operating Frequency (from 50kHz to 425kHz)
• Adjustable Soft-Start Current Ramping
• ±1% Internal Voltage Reference
• Internal 10V LDO Regulator for Gate Driver
• Two RUN Pins and Dual Power Good Monitors
• Flexible Topology for Boost, SEPIC and Flyback

Applications

• Automotive System, Telecom System and Industrial Power Supplies

Diagrams and Performance

Top View Pinouts: Describes the pin connections for the FE PACKAGE 28-LEAD PLASTIC TSSOP and UFD PACKAGE 28-LEAD (4mm × 5mm) PLASTIC QFN.

Efficiency vs Output Current: A graph shows Efficiency (%) on the Y-axis versus IOUT (A) on the X-axis for VIN = 24V and VIN = 12V, with VOUT = 240V.

12V Bidirectional Dual Battery System with FHCM and RHCM: A schematic illustrates a typical application circuit for a dual phase system with two LTC7840 controllers, showing VIN, RUN1/2, GATE1/2, SENSE1+/-, ILIM1/2, etc., connected to external components.

LT8708: 80V Synchronous 4-Switch Buck-Boost DC/DC Controller with Flexible Bidirectional Capability

A high performance buck-boost switching regulator controller that operates from an input voltage that can be above, below or equal to the output voltage. It supports bidirectional power conversion and regulation of VIN, VOUT, IOUT, and IIN.

Features

• Single Inductor Allows VIN Above, Below or Equal to VOUT
• Six Independent Forms of Regulation: VIN Current (Forward and Reverse), VOUT Current (Forward and Reverse), VIN and VOUT Voltage
• Forward and Reverse Discontinuous Conduction Mode Supported
• Supports MODE and DIR Pin Changes While Switching
• VINCHIP Range 2.8V (Need EXTVCC > 6.4V) to 80V
• VOUT Range: 1.3V to 80V
• Synchronous Rectification: Up to 99% Efficiency
• Available in 40-Lead (5mm × 8mm) QFN with High Voltage Pin Spacing

Applications

• High Voltage Buck-Boost Converters
• Bidirectional Charging System
• Automotive 48V Systems

Diagrams and Performance

Top View Pinout: Describes the pin connections for the UHG PACKAGE 40-LEAD (5mm × 8mm) PLASTIC QFN.

Efficiency: A graph shows Efficiency (%) on the Y-axis versus VBAT1 (V) on the X-axis, for VBAT2 = 13.5V and IOUT = 15A.

12V Bidirectional Dual Battery System with FHCM and RHCM: A schematic illustrates a dual battery system with the LT8708, showing VINCHIP, VBAT1/2, IOUT, and various control pins connected to external components.

LT8708-1: 80V Synchronous 4-Switch Buck-Boost DC/DC Slave Controller for LT8708 Multiphase System

A slave controller designed to be paralleled with the LT8708 to add power and phases to an LT8708 system. It offers the same conduction modes and efficiency as the LT8708.

Features

• Slave Chip of LT8708 to Deliver Additional Power
• Good Current Matching to the Average Output Current of LT8708 Through Current Regulation
• Easily Paralleled with LT8708 Through Four Pins
• Synchronized Start-Up with LT8708
• Same Conduction Modes as LT8708
• Synchronous Rectification: Up to 98% Efficiency
• Frequency Range: 100kHz to 400kHz
• Available in 40-Lead (5mm × 8mm) QFN with High Voltage Pin Spacing

Applications

• High Voltage Buck-Boost Converters
• Bidirectional Charging Systems
• Automotive 48V Systems

Diagrams and Performance

Top View Pinout: Describes the pin connections for the UHG PACKAGE 40-LEAD (5mm × 8mm) PLASTIC QFN.

Efficiency: A graph shows Efficiency (%) on the Y-axis versus VBAT1 (V) on the X-axis, for VBAT2 CHARGING CURRENT = 30A.

LT8708-1 2-Phase 12V Bidirectional Dual Battery System with FHCM and RHCM: A schematic illustrates a system with a master LT8708 and slave LT8708-1, showing connections for power transfer and control.

ADM1266: Cascadable Super Sequencer with Margin Control and Fault Recording

A configurable supervisory/sequencing device offering a single-chip solution for supply monitoring and sequencing in systems with up to 17 supplies. Expandable to 257 supplies via a proprietary 2-wire interface.

Features

• Complete Supervisory and Sequencing Solution for Up to 17 Supplies
• Expandable to 257 Supplies with Additional ADM1266 ICs Connected to the 2-Wire Interdevice Bus
• Fully Programmable Sequencing Engine
• 17 Supply Fault Detectors Enable Real Time Supervision of Supplies
• 0.4V to 15V on VH1 to VH4 (VHx)
• 0.4V to 5V on VP1 to VP13 (VPx)
• Device Powered by the Higher of VH1 and VH2 Inputs for Improved Operating Redundancy
• 12-Bit ADC for Readback of all Supervised Voltages
• Black Box Nonvolatile Fault Recording
• 16 PDIOs
• 9 GPIOs
• 9 Voltage Output 8-Bit DACs Allow Voltage Margining Adjustment via DC-to-DC Converter Trim/Feedback Node
• Main and Backup Memory
• Industry Standard PMBus Interface Compliant
• Available in a 9mm × 9mm, 64-Lead Package

Applications

• Communications Infrastructure
• Industrial Test and Measurement

Diagrams and Performance

Top View Pinout: Describes the pin connections for the LFCSP PACKAGE 64-LEAD, LEAD FRAME CHIP SCALE PACKAGE.

Block Diagram: Illustrates the internal structure including PMBus Interface, ADC, DACs, Sequencing Engine, EEPROM, SRAM, PDIOs, GPIOs, and Interdevice Bus.

LTC2962/LTC2963/LTC2964: ±0.5% Accurate Quad Configurable Supervisor

A series of configurable power supply monitors that can supervise systems with up to four supply voltages. They offer ±0.5% threshold accuracy over temperature and selectable ±4% and ±6% thresholds per supply.

Features

• Simultaneously Monitor Four Power Supplies
• ±0.5% Threshold Accuracy Over Temperature
• Selectable ±4% and ±6% Thresholds per Supply: 5V, 3.3V, 2.5V, 1.8V, 1.5V, 1.2V, 1V and ±ADJ
• Adjustable Reset (RST) Timeout
• Overvoltage and Negative Voltage Monitoring
• Push-Pull or Open-Drain RST Output
• Margin Pin RDIS for Reset Disable
• H-Grade Temperature Range
• LTC2963: Non-Windowed (±1) Watchdog, Adjustable Watchdog Timer, Watchdog Status Output WDO, Selectable Initial Watchdog Timeout
• LTC2964: Individual Comparator Open-Drain Outputs
• 16-Lead 3mm × 3mm QFN (LTC2962)
• 20-Lead 3mm × 4mm QFN (LTC2963, LTC2964)

Applications

• High Reliability Systems
• Network, Telecom and Server Systems
• Automotive Control Systems

Diagrams and Performance

Typical Distribution of Monitor Threshold Error: A histogram showing the distribution of threshold errors (%) across 31,616 thresholds.

Top View Pinouts: Describes the pin connections for the UUDDPPAACCKKAAGGEE 1166--LLEEAADD((33mmmm33mmmm))PPLLAASSTTIICCQQFFNN (LTC2962), UDC PACKAGE 20-LEAD (3mm × 4mm) PLASTIC QFN (LTC2963, LTC2964).

Typical Application Circuit: A schematic shows VCC, V1-V4, DVCC, REF, RST, PG1, RDIS, PG2, PG3, PG4, GND, MR, RT, CRT pins connected to external components like resistors and capacitors.

DN575: High Efficiency 20A Monolithic Silent Switcher®2 Regulator for SoC and µP Applications

Discusses the need for high performance, compact, high current, high efficiency, and superior EMI power solutions for advanced SoCs. Highlights the LTC7150S as a solution, featuring integrated MOSFETs and Silent Switcher 2 architecture.

Key Features and Performance

• Powers advanced SoCs requiring reliable power (e.g., 0.8V, 1.2V, 1.1V, 5V, 3.3V, 1.8V).
• LTC7150S offers high efficiency, small form factor, and low EMI.
• Integrated high performance MOSFETs and thermal management enable up to 20A from 20V input without heat sinking or airflow.
• Schematic: A 1.2V output at 20A solution using LTC7150S switching at 1MHz is shown, with VIN, RUN, SW, PVIN, SVIN, FB, PHMODE, TRACK/SS, CLKOUT, INTVCC, VOUT·, PGOOD, MODE/SYNC, SGND, ITH, RT pins connected to external components.
• Graphs:
  • Efficiency and Power Loss of Figure 1: Shows Efficiency (%) and Power Loss (W) vs. IOUT (A) for SVIN = 5V, VIN = 12V, demonstrating high efficiency up to 20A.
  • CISPR22 Radiated Emissions: Shows Amplitude (dBµV/m) vs. Frequency (MHz) for a 14V VIN to 1V/20A output at 400kHz, indicating compliance with CISPR22 Class B limits with a simple EMI filter.
• Silent Switcher 2 architecture minimizes EMI via integrated hot loop capacitors.
• High frequency operation (e.g., 2MHz) with small passive components (e.g., 72nH inductor) for compact solutions.

DN577: 42V Monolithic Synchronous Step-Down Regulators with 2.5µA Quiescent Current and Ultralow EMI

Introduces the LT8606/LT8607/LT8608 series of monolithic step-down regulators, optimized for wide input voltage range, low EMI, and small solution sizes. They are ideal for battery-powered applications due to their low quiescent current (2.5µA in Burst Mode® operation).

Key Features and Performance

• Part Numbers and Capabilities: Table lists LT8606 (350mA), LT8607 (750mA), LT8608 (1.5A) with MSE-10 and DFN-8 package options and operation modes (Burst Mode, Pulse-Skipping, Spread Spectrum, Sync Mode).
• Low Quiescent Current: 2.5µA in Burst Mode operation is crucial for battery-powered applications.
• Wide Input Voltage Range: 3V to 42V, suitable for automotive and industrial environments.
• Schematic: A high efficiency LT8607 12V to 5V Synchronous Step-Down Converter is shown, with VIN, EN/UV, VOUT, SYNC, SW, LT8607, INTVCC, FB, TR/SS, RT, GND pins connected to external components like L1 and capacitors.
• Graphs:
  • Efficiency vs. Load Current: Shows Efficiency (%) vs. IOUT (mA) for LT8606/LT8607/LT8608 based 12VIN to 5VOUT converter, peaking around 92.5%.
  • Light Load Efficiency: Shows Efficiency (%) and Power Loss (mW) vs. IOUT (mA) for the LT8607 circuit, highlighting efficiency at low loads.
  • CISPR25 Radiated EMI Performance: Shows Amplitude (dBµV/m) vs. Frequency (MHz) for the LT8607 circuit, comparing Fixed Frequency and Spread Spectrum Mode against CLASS 5 PEAK LIMIT.
• Spread spectrum operation reduces EMI emissions.

LTC7815: 38V Triple Controller for Auto Start/Stop

A triple controller (Dual Buck Plus Single Boost) designed to keep navigation systems from resetting during engine start/stop events. It maintains regulation through engine restarts down to 2.5V input.

Key Features

• Dual Buck Plus Single Boost Synchronous Controllers
• VIN Range: 4.5V to 38V
• Outputs Remain in Regulation Through Engine Restart Down to 2.5V
• For 60VIN Use LTC3899
• Low Operating IQ: 28µA
• Up to 2.25MHz Operation

Application

• Automotive Infotainment Navigation Systems

Diagram

38V Triple Controller for Auto Start/Stop: A diagram shows a 12V Battery powering Infotainment and Navigation systems via an LTC7815 controller with Boost, Buck, and Buck outputs.