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.