AEK-POW-LDOV02X Schematic Diagrams
Overview
This document provides detailed schematic diagrams for the AEK-POW-LDOV02X, a power management solution likely featuring Low-Dropout (LDO) voltage regulators. The schematics illustrate the circuit configurations, component interconnections, and operational modes.
Circuit Schematic - Page 1 of 3
The first schematic depicts the core circuitry for two LDO channels, LDO1 and LDO2. Key components include:
- LDO ICs: L99VR02XP-TR is identified as the main LDO component.
- Input/Output: VBAT1, VS1, VO1 for LDO1 and VBAT2, VS2, VO2 for LDO2 represent power supply inputs and regulated outputs.
- Protection: Diodes (STPS140AY, SMCJ24CA) and capacitors (C1-C7 for LDO1, C8-C14 for LDO2) are used for input protection and filtering.
- Control Pins: EN_LDO1/EN_LDO2 (Enable), Ishort_LDO1/Ishort_LDO2 (Current Limit), ADC_LDO1/ADC_LDO2 (Analog-to-Digital Converter input), Wi_LDO1/Wi_LDO2 (likely related to tracking or monitoring), RST_LDO1/RST_LDO2 (Reset), TW_LDO1/TW_LDO2 (likely related to thermal warning or tracking).
- Tracking/Configuration: Pins like TC_CONF, TRK_STAT, TRK_MODE, IN_TRK are used for configuring tracking behavior and status monitoring.
- Selection Pins: SEL1, SEL2, SEL3 for both LDO1 and LDO2 allow for output voltage selection via external resistors (R14-R19).
- Resistors: Various resistors (R1, R2, R5, R8, R12, R14-R19, R20, R21) are used for setting current limits, voltage selection, and other biasing functions.
- Capacitors: C6, C13 are for reset delay, and C7, C14 are for transient response filtering.
- Thermal Information: Rthj-case, Rthj-amb_auto, Rthj-amb_mutua indicate thermal resistance values.
- Advanced Thermal Warning: A pin is designated for advanced thermal warning, indicating output overvoltage or junction temperature thresholds.
A selection table illustrates how combinations of SEL1, SEL2, and SEL3 pins, along with associated resistors, determine the output voltage (Vo) for LDO1 and LDO2.
Circuit Schematic - Page 2 of 3
This page details the microcontroller (MCU) control interfaces and additional circuit configurations:
- MCU Control: Connectors CN1A/CN1B and CN2A/CN2B interface with a microcontroller for controlling LDO1 and LDO2. Pins include MCU TRK MODE, MCU TC CONF, MCU LDO1/LDO2 EN, and ADC outputs.
- Manual Mode Selection: Jumpers (JP15, JP-INTRK, JP4, JP5, JP6, JP13) and resistors (R36-R47) are used to manually enable/disable LDO functions, tracking, and configuration modes, or to select input voltage sources (VS1, VS2).
- Tracking Configuration: The schematic shows how to configure tracking modes using jumpers and resistors, allowing for manual or automatic tracking control.
- Output Voltage Selection Tables: Detailed tables for LDO1 and LDO2 show the output voltages corresponding to different combinations of SEL1, SEL2, and SEL3 pin states (0 or 1, typically controlled by jumpers JP7-JP12).
Circuit Schematic - Page 3 of 3
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Additional Information
The document footer indicates that this is Revision 1 of the AEK-POW-LDOV02X, dated July 2025. It also provides a link to www.st.com for further information.
