SLUUCY0A September   2023  – February 2024 TPSM861252 , TPSM861253 , TPSM861257

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 Input and Output Connections
    2. 2.2 Output Voltage Setpoint
    3. 2.3 Start-Up Procedure
  8. 3Implementation Results
    1. 3.1 Test Setup and Results
      1. 3.1.1 Efficiency
      2. 3.1.2 Load Regulation
      3. 3.1.3 Line Regulation
      4. 3.1.4 Load Transient Response
      5. 3.1.5 Start-Up
      6. 3.1.6 Shutdown
      7. 3.1.7 Output Voltage Ripple
  9. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials
  10. 5Additional Information
    1.     Trademarks
  11. 6Related Documentation
  12. 7Revision History

1.1 Introduction

The TPSM86125x is a single, adaptive on-time, D-CAP3 control mode, synchronous buck converter module that requires a very low external component count. The D-CAP3 control circuit is optimized for low-ESR output capacitors such as POSCAP, SP-CAP, or ceramic types and features fast transient response with no external compensation. The switching frequency is internally set at a nominal 1.4MHz. The high-side and low-side switching MOSFETs are incorporated inside the TPSM86125x package along with the gate-drive circuitry. The low drain-to-source on resistance of the MOSFETs and fast switching slew rate allow the TPSM86125x to achieve high efficiency and help keep the junction temperature low at high output currents. Power sequencing is possible by correctly configuring the enable and power-good indicator. Rated input voltage and output current ranges for the evaluation module are given in Table 2-3.

Table 1-1 Input Voltage, output voltage and output Current Summary
EVMInput Voltage (VIN) RangeOutput Voltage (Vout) RangeOutput Current (IOUT) Range
TPSM861252EVM3V to 17V0.6V to 10V0A to 1A
TPSM861253EVM3.8V to 17VFixed 3.3V0A to 1A
TPSM861257EVM3V to 17V0.6V to 5.5V0A to 1A

This user's guide mainly introduces the TPSM861253 features as well as support documentation for the TPSM861253EVM. This document includes the following information:

  • Performance specifications
  • Board layout
  • Schematic
  • Bill of materials