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User Guide for ANALOG DEVICES models including: DC3248A Low VIN High Efficiency 10A Step Down DC to DC Module Regulator, DC3248A, Low VIN High Efficiency 10A Step Down DC to DC Module Regulator, High Efficiency 10A Step Down DC to DC Module Regulator, 10A Step Down DC to DC Module Regulator, Step Down DC to DC Module Regulator, DC to DC Module Regulator, Module Regulator, Regulator
LTM4659 Datasheet and Product Info | Analog Devices
DC3248A Evaluation Board | Analog Devices
17 hours ago — Evaluation Board User Guide. DC3248A. LTM4659. Low ... Evaluation Board User Guide. DC3248A analog.com. Rev ... Quick Start. Required Equipment. • One 0V to 30V DC ...
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DocumentDocumentEvaluation Board User Guide DC3248A LTM4659 Low VIN, High Efficiency 10A Step-Down DC-to-DC Module Regulator General Description The DC3248A evaluation board circuit features the LTM®4659, a high efficiency, 10A step-down power µModule® regulator. The input voltage range is from 2.25V to 5.5V. The output voltage range is 0.5V to VIN. Derating may be necessary for certain VIN, VOUT, frequency and thermal conditions. The DC3248A evaluation board offers the SSTT pin, allowing the user to program output tracking, soft start period and die temperature monitoring. The MODE/SYNC pin either synchronizes the switching frequency to an external clock, is a clock output, or sets the PWM mode. It can be externally synchronized to a clock from 1MHz to 2.6MHz. The Pulse width modulation (PWM) modes of operation are Forced continuous mode (FCM) for low noise or pulse-skipping mode (PSM) for high efficiency at light load. The LTM4659 defaults to FCM during synchronization and operates in PSM when both the FREQ and MODE/SYNC pins are connected to VIN. Ordering Information appears at end of demo manual. The LTM4659 uses external compensation. Users can tune the compensation circuit to ensure the loop is stable and that the desired transient performance can be achieved. For output loads that demand more than 10A of current, multiple LTM4659s can be paralleled to run out-of-phase to provide more output current without increasing input and output voltage ripples. The LTM4659 data sheet must be read in conjunction with this evaluation board manual prior to working on or modifying the DC3248A evaluation board. Features and Benefits · Tiny surface mount, 4mm × 4mm × 1.43mm LGA · Silent Switcher®2 architecture · Ultralow Electromagnetic Interference (EMI) noise DC3248A Evaluation Board Files FILE DC3248A DESCRIPTION Evaluation board circuit design files. Figure 1. DC3248A Evaluation Board Circuit (Part Marking Is Either Ink Mark or Laser Mark) Rev. 0 One Analog Way, Wilmington, MA 01887-2356, U.S.A. DOCUMENT FEEDBACK Tel: 781.329.4700 TECHNICAL SUPPORT ©2024 Analog Devices, Inc. All rights reserved. Evaluation Board User Guide DC3248A Table 1. Performance Summary Specifications are at TA = 25°C PARAMETER CONDITIONS/NOTES Input voltage range Output voltage Maximum continuous output current Derating is necessary for certain operating conditions. Refer to the data sheet for details. Operating frequency Efficiency VIN = 3.3V, VOUT = 1.0V, IOUT = 10A Load transient VIN = 3.3V, VOUT = 1.0V, ISTEP = 0A to 2.5A MIN 2.25 0.985 TYP 1.0 MAX 5.5 1.015 10 2 82.16 (see Figure 3) 70 (see Figure 5) UNITS V V ADC MHz % mV Quick Start Required Equipment · One 0V to 30V DC, 20A power supply · Electronic load with 20A sink capacity · Four digital multimeters (DMM) Procedure The DC3248A evaluation board is an easy way to evaluate the performance of the LTM4659. See Figure 2 for proper measurement equipment setup and follow the procedure below. 1. Place jumpers in the following positions for a typical application. JP1 RUN JP2 MODE/CLK ON CCM 2. With the power off, connect the input power supply, load and meters as shown in Figure 2. Preset the load to 0A and VIN supply to 3.3V. 3. Turn on the power supply at the input. The output voltage should be 1.0V ±1.5% (0.985V to 1.015V). 4. Vary the input voltage from 2.25V to 5.5V and adjust the load current from 0A to 10A. Observe the output voltage regulation, ripple voltage, efficiency, and other parameters. 5. (Optional) To set LTM4659 to PSM, set the MODE/CLK jumper JP8 to PS. See Table 2 for more details. Table 2. LTM4659 Single-Phase Configuration FREQ PIN CONNECTION VIN VIN VIN Resistor to AGND MODE/SYNC PIN CONNECTION Clock input AGND VIN Clock output MODE OF OPERATION FCM FCM PSM FCM SWITCHING FREQUENCY External clock 2MHz default 2MHz default RFREQ-programmed 6. (Optional) For the optional load transient test, apply an adjustable pulse signal between IOSTEP_CLK and GND test points. The pulse amplitude sets the load step current amplitude. Keep the pulse width short (<1ms) and pulse duty cycle low (<5%) to limit the thermal stress on the load transient circuit. 7. (Optional) LTM4659 can be synchronized to an external clock signal. Place the JP8 jumper on CLK and apply a clock signal on the CLK test point. analog.com Rev. 0 2 of 9 Evaluation Board User Guide DC3248A 8. (Optional) The output of LTM4659 can track another voltage. This external voltage can be connected to the test point TRACK on this board. Figure 2. Measurement Setup of DC3248A analog.com Rev. 0 3 of 9 Evaluation Board User Guide Typical Performance Characteristics EFFICIENCY (%) 95 90 85 80 75 70 65 60 2.5VIN 3.3VIN 55 5.0VIN 5.5VIN 50 0 2 4 6 8 10 12 LOAD CURRENT (A) Figure 3. Measured Efficiency at fSW = 2MHz VOUT 5mV/DIV 1µs/DIV Figure 5. Output Voltage Ripple at VIN = 3.3V, VOUT = 1.0V, IOUT =10A 005 003 DC3248A VOUT 5mV/DIV 1µs/DIV Figure 4. Output Voltage Ripple at VIN = 3.3V, VOUT = 1.0V, IOUT = 0A VOUT 50mV/DIV ILOAD 2A/DIV 100µs/DIV VIN = 3.3V, VOUT = 1.0V, IOUT = 0A OUTPUT CAPACITOR = 100µF + 2 × 22µF fSW = 2MHz Figure 6. Load Transient at VIN = 3.3V, VOUT = 1.0V, IOUT_STEP = 0A to 2.5A 006 004 Figure 7. Thermal Image of LTM4659 at VIN = 3.3V, VOUT = 1.0V, IOUT = 10A (TA = 25°C, No Forced Airflow) analog.com Rev. 0 4 of 9 Evaluation Board User Guide DC3248A DC3248A Bill of Materials ITEM QTY REFERENCE Required Circuit Components PART DESCRIPTION MANUFACTURER/PART NUMBER 1 4 C1, C3, CIN1, CIN5 CAP., 10F, X7R, 16V, 10%, 0805 2 2 C2, CIN6 CAP., 150F, ALUM ELECT, 10V, 20%, 8mm × 6.9mm TAIYO YUDEN, EMK212BB7106MG-T PANASONIC, 10SVP150MX 3 1 C4 CAP., 0.1F, X7R, 6.3V, 10%, 0603 AVX, 06036C104KAT2A 4 1 C13 5 1 CIN2 6 2 CIN3, CIN4 7 1 COUT1 8 1 COUT2 9 1 COUT3 10 1 R3 CAP., 680pF, C0G, 25V, 5%, 0603 CAP., 22F, X5R, 10V, 20%, 0603 CAP., 22F, X5R, 16V, 10%, 0805 CAP., 22F, X5R, 6.3V, 20%, 0603 CAP., 22F, X5R, 6.3V, 20%, 0805 CAP., 100F, X5R, 6.3V, 20%, 0805 RES., 100k, 1%, 1/10W, 0603 AVX, 06033A681JAT2A AVX, 0603ZD226MAT2A TDK, C2012X5R1C226M125AC MURATA, GRM188R60J226MEA0D MURATA, C0805C226M9PACTU MURATA, GRM21BR60J107ME15K STACKPOLE ELECTRONICS, INC., RMCF0603FG100K 11 2 R4, R6 RES., 60.4k, 1%, 1/10W, 0603, AEC-Q200 VISHAY, CRCW060360K4FKEA 12 1 R15 RES., 6.8 k, 5%, 1/16W, 0603 KOA SPEER, RK73B1JTTD682J 13 1 U1 IC, 5.5VIN, 10A Module, 4mm × 4mm PCKG, BGA ADI, LTM4659EV#PBF Additional Evaluation Board Circuit Components 1 0 C5C7, C12 CAP., OPTION, 0603 2 0 C11 3 1 R11 CAP., OPTION, 0805 RES., 0, 1/10W, 0603 BOURNS, CR0603-J/-000ELF 4 0 R12 RES., OPTION, 0603 5 3 C8C10 CAP., 1F, X7R, 16V, 10%, 0603 6 1 L1 7 1 Q1 8 1 R13 IND., 100 AT 100MHz, FERRITE BEAD, 25%, 8A, 6m, 1812 XSTR., MOSFET, N-CHAN, 30V, 5.5A, 3-PIN SOT-23 RES., 10k, 1%, 1/10W, 0603, AEC-Q200 9 1 R14 RES., 10, 1%, 1/10W, 0603 10 1 RS1 RES., 0.020, 1%, 1W, 1206, PWR, METAL, SENSE, AEC-Q200 Hardware: For Evaluation Board Circuit Only 1 8 E1-E8 2 5 J1J5 3 2 J6, J7 4 1 JP1 5 1 JP8 TEST POINT, TURRET, 0.094 MTG. HOLE, PCB 0.062 THK CONN., BANANA JACK, FEMALE, THT, NONINSULATED, SWAGE, 0.218 CONN., RF, BNC, RCPT, JACK, 5-PIN, ST, THT, 50 CONN., HDR, MALE, 1 × 3, 2mm, VERT, ST, THT, NO SUBS. ALLOWED CONN., HDR., MALE, 2 × 3, 2mm, VERT, ST, THT 6 4 MP1MP4 STANDOFF, NYLON, SNAP-ON, 0.50 7 2 XJP1, XJP8 analog.com CONN., SHUNT, FEMALE, 2-POS, 2mm KEMET, C0603C105K4RAC7867 WURTH ELEKTRONIK, 74279226101 VISHAY, Si2338DS-T1-GE3 VISHAY, CRCW060310K0FKEA VISHAY, CRCW060310R0FKEA VISHAY, WSLP1206R0200FEA MILL-MAX, 2501-2-00-80-00-00-07-0 KEYSTONE, 575-4 AMPHENOL RF, 112404 WURTH ELEKTRONIK, 62000311121 WURTH ELEKTRONIK, 62000621121 KEYSTONE, 8833 WURTH ELEKTRONIK, 60800213421 Rev. 0 5 of 9 Evaluation Board User Guide DC3248A Schematic DC3248A analog.com Rev. 0 6 of 9 Evaluation Board User Guide Ordering Information PART TYPE DC3248A #Denotes RoHS-compliant. Evaluation board circuit. DC3248A analog.com Rev. 0 7 of 9 Evaluation Board User Guide Revision History REVISION NUMBER 0 REVISION DATE DESCRIPTION 04/24 Initial release DC3248A PAGES CHANGED -- analog.com Rev. 0 8 of 9 Evaluation Board User Guide Notes DC3248A ASSUMED BY ANALOG DEVICES FOR ITS USE, NOR FOR ANY INFRINGEMENTS OF PATENTS OR OTHER RIGHTS OF THIRD PARTIES THAT MAY RESULT FROM ITS USE. SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE. NO LICENCE, EITHER EXPRESSED OR IMPLIED, IS GRANTED UNDER ANY ADI PATENT RIGHT, COPYRIGHT, MASK WORK RIGHT, OR ANY OTHER ADI INTELLECTUAL PROPERTY RIGHT RELATING TO ANY COMBINATION, MACHINE, OR PROCESS WHICH ADI PRODUCTS ALL INFORMATION CONTAINED HEREIN IS PROVIDED "AS IS" WITHOUT REPRESENTATION OR WARRANTY. NO RESPONSIBILITY IS OR SERVICES ARE USED. TRADEMARKS AND REGISTERED TRADEMARKS ARE THE PROPERTY OF THEIR RESPECTIVE OWNERS. analog.com Rev. 0 9 of 9