6 Detailed Description

6.1 Overview

The TPSM81033 is a synchronous boost power module and operates from an input voltage supply range up

to 5.5V with 2A (typical) valley switch current limit. The TPSM81033 operates at 2.4MHz switching frequency.

There are two optional modes at light load by configuring the MODE pin: auto PFM mode and forced PWM to

balance the efficiency and noise immunity in light load. The TPSM81033 consumes an 20μA quiescent current

from AVIN at light load condition. During shutdown, the TPSM81033 is completely disconnected from the input

power and only consumes a 0.1μA current to achieve long battery life. During PWM operation, the converter

uses adaptive constant on-time valley current mode control scheme to achieve excellent line regulation and load

regulation and allows the use of a small inductor and ceramic capacitors. Internal loop compensation simplifies

the design process while minimizing the number of external components.

The TPSM81033 versions in the VCD package uses MagPack packaging technology to deliver the highest-

performance power module design. Leveraging our proprietary integrated-magnetics packaging technology,

power modules with MagPack (magnetics in package) packaging technology deliver industry-leading power

density, high efficiency, good thermal performance, ease of use, and reduced EMI emissions.

6.2 Functional Block Diagram

7

8

3

SW

EN

FB

VOUT

AVIN

VREF

6

2

GND

VOUT

VOUT

AVIN

4

MODE

5

PG

Valley Current

Sense

So Startup

PWM Control

Gate Driver

Undervoltage

Lockout

Logic

Thermal

Shutdown

Over Voltage

and Short

Circuit

Protec on

PGOOD

+

–

EA

1

PVIN

www.ti.com

TPSM81033

SLVSHL0D – JUNE 2024 – REVISED DECEMBER 2024

Copyright © 2024 Texas Instruments Incorporated

Submit Document Feedback

9

Product Folder Links: TPSM81033