1 Features

• Input voltage range: 1.8V to 5.5V

• Output voltage range: 2.2V to 5.5V

– FB connected to AVIN pin for fixed 5.0V output

• 2A valley switching current limit

• Integreted 0.43μH power inductor

• Excellent thermal performance:

– < 10°C temperature rise at VIN = 3.6V, VOUT =

5V, IOUT = 1A, and TA=25°C

• High efficiency and high power capability

– Two 22mΩ (LS) / 46mΩ (HS) MOSFETs

– > 93% efficiency at VIN = 3.6V, VOUT = 5V, and

IOUT = 1A

• Optimized load regulation with internal resistor

divider (fixed 5.0V output voltage).

• 2.4MHz switching frequency

• Typical 20μA quiescent current into AVIN pin

• ±1.5% Reference voltage accuracy over –40°C to

+125°C

• Power good output with window comparator

• Pin-selectable auto PFM or forced PWM at light

load

• Pass-through mode when VIN > VOUT

• Safety and robust operation features

– True disconnection between input and output

during shutdown

– Output overvoltage, thermal shutdown

protection and output short-circuit protection

• 2.6mm × 2.5mm QFN-FCMOD 9-Pin package

2 Applications

• Optical module

• Patient monitor

• Smart meter

3 Description

The TPSM81033 is a synchronous boost module. The

device provides a power supply solution for portable

equipment and smart devices powered by batteries

and other power supply. The TPSM81033 has 2A

(typical) valley switch current limit. The power module

uses TI's MagPack packaging technology to integrate

a synchronous boost converter and an inductor to

simplify design, reduce external components, and

save PCB area.

The TPSM81033 uses adaptive constant on-time

valley-current-control topology to regulate the output

voltage and 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

a 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. The TPSM81033 has 5.75V output

overvoltage protection, output short circuit protection,

and thermal shutdown protection. The TPSM81033

offers a very small solution size with 2.6mm × 2.5mm

QFN-FCMOD (9) package and minimum amount of

external components.