1 Features

1• Input Voltage Range: 0.5 V to 4.4 V

• 0.9 V Minimum Input Voltage for Startup

• Output Voltage Setting Range: 1.8 V to 4.0 V

• 91% Efficiency at VIN = 2.4 V, VOUT = 3.3 V and

IOUT = 1.5 A

• 2.0-MHz Switching Frequency

• IOUT > 1.5 A at VOUT = 3.3 V when VIN > 1.8 V

• 17-μA Typical Quiescent Current

• ±2.5% Reference Voltage Accuracy over -40°C to

125°C

• PFM Operation Mode at Light Load

• True Disconnection Between Input and Output

During Shutdown

• Output Over Voltage Protection

• Output Short Circuit Protection

• Thermal Shutdown Protection

• 2-mm x 2-mm WSON Package

2 Applications

• Battery Powered IoT Devices

• Gaming Control

• Thermostat

• Portable Medical Equipment

• Supercap Backup System

3 Description

The TPS61021A provides a power supply solution for

portable or smart devices powered by alkaline, NiMH,

Li-Mn, or Li-ion batteries. The TPS61021A is capable

of outputting 3.3-V voltage and 1.5-A current from a

battery discharged to as low as 1.8 V. Capable of

operating with 0.5-V input voltage enables the

TPS61021A to extend the battery run time.

The TPS61021A operates at 2-MHz switching

frequency at heavy load and enters power-save mode

at light load to maintain high efficiency over the entire

load current range. The device only consumes a 17-

μA quiescent current from VOUT in light load condition.

During shutdown, the load is completely disconnected

from the input. In addition, The TPS61021A provides

4.35-V output overvoltage protection, output short

circuit protection, and thermal shutdown protection.

The TPS61021A offers a very small solution size due

to low count of external components. It allows the use

of small inductors and output capacitors with the 2-

MHz switching frequency.

The TPS61021A is available in 2.0-mm x 2.0-mm

WSON package.