TPSM8290x Step-Down Converter Evaluation Module User's Guide

Trademarks

MicroSiP is a trademark of Texas Instruments.

All trademarks are the property of their respective owners.

1 Introduction

The TPSM8290x are synchronous, step-down converter modules in a small 3.0-mm × 2.8-mm × 1.6-mm MicroSiP package. Three different devices in this family support 1 A, 2 A, or 3 A of output current.

1.1 Performance Specification

Table 1-1, Table 1-2, and Table 1-3 provide a summary of the TPSM8290xEVM performance specifications.

Table 1-1 TPSM82903EVM Performance Specification Summary

Specification	Test Conditions	MIN	TYP	MAX	Unit
Input voltage		3	12	17	V
Output voltage setpoint			1.2		V
Output current		0		3	A
MODE/S-CONF (R7) setting	2.5 MHz, auto PFM/PWM with AEE, external FB, output discharge disabled		7.15		kΩ

Table 1-2 TPSM82902EVM Performance Specification Summary

Specification	Test Conditions	MIN	TYP	MAX	Unit
Input voltage		3	12	17	V
Output voltage setpoint			1.8		V
Output current		0		2	A
MODE/S-CONF (R7) setting	2.5 MHz, auto PFM/PWM with AEE, external FB, output discharge disabled		7.15		kΩ

Table 1-3 TPSM82901EVM Performance Specification Summary

Specification	Test Conditions	MIN	TYP	MAX	Unit
Input voltage		3.4	12	17	V
Output voltage setpoint			3.3		V
Output current		0		1	A
MODE/S-CONF (R7) setting	2.5 MHz, auto PFM/PWM with AEE, external FB, output discharge disabled		7.15		kΩ

1.2 Modifications

The printed-circuit board (PCB) for this EVM is designed to accommodate some modifications by the user. Additionally, the following modifications can be made:

Input and output capacitors can be added.
The input voltage at which the IC turns on can be adjusted with two resistors
The soft-start time can be changed.
The output voltage can track an applied voltage
A feedforward capacitor can be added.
The switching frequency, output discharge setting, MODE setting, and output voltage setting configuration can be changed.

See the TPSM82903, 3-A, 3-V to 17-V, High Efficiency and Low IQ Buck Converter Module in a MicroSiP Package with an Integrated Inductor Data Sheet for details of the various settings.

1.2.1 Input and Output Capacitors

C2, C3, and C4 are provided for additional input capacitors. These capacitors are not required for proper operation but can be used to reduce the input voltage ripple.

C7, C8, C9, and C10 are provided for additional bulk output capacitors. These capacitors are not required for proper operation but can be used to reduce the output voltage ripple. The total output capacitance must remain within the recommended range in the TPSM82903, 3-A, 3-V to 17-V, High Efficiency and Low IQ Buck Converter Module in a MicroSiPTM Package with an Integrated Inductor Data Sheet for proper operation.