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TPS61021ADSGR

TITPS61021ADSGR

Texas Instruments
Boost Switching Regulator IC Positive Adjustable 1.8V 1 Output 3A (Switch) 8-WFDFN Exposed Pad
NRND45,145 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The TPS61021ADSGR is a high-efficiency synchronous boost converter designed for single-cell Li-ion or multi-cell alkaline battery applications. It operates from a wide input voltage range of 0.5V to 4.4V, allowing it to extract maximum energy from batteries even as their voltage drops significantly. The device features a 2MHz switching frequency and a 3A switch current limit, enabling the use of small external inductors and capacitors.

Why Choose This Part

This regulator offers an ultra-low quiescent current of 17uA and true disconnection during shutdown, preventing current leakage from the input to the output. Its 2MHz switching frequency reduces the total solution size, while the Power Save Mode (PFM) maintains high efficiency during light-load operation.

Applications

Single-Cell Li-ion Systems
Boosting 3.6V nominal battery voltage to 4V for high-current pulses in IoT sensors.
Supercapacitor Backup
Efficiently discharging supercapacitors down to 0.5V to maintain power for system shutdown routines.
Smart Home Devices
Providing stable power for digital thermostats and gaming controllers from low-voltage alkaline cells.
Portable Medical Equipment
Compact power delivery for handheld diagnostic tools requiring a small footprint and high efficiency.

Key Specifications

Function Step-Up
Topology Boost
Output Type Adjustable
Mounting Type Surface Mount
Package / Case 8-WFDFN Exposed Pad
Current - Output 3A (Switch)
Number of Outputs 1
Output Configuration Positive
Frequency - Switching 2MHz
Operating Temperature -40degC ~ 125degC (TJ)
Synchronous Rectifier Yes
Voltage - Input (Max) 4.4V
Voltage - Input (Min) 0.5V
Voltage - Output (Max) 4V
Supplier Device Package 8-WSON (2x2)
Voltage - Output (Min/Fixed) 1.8V

Getting Started

To evaluate this part, use the TPS61021AEVM-026 evaluation module to test transient response and efficiency across various load conditions. Ensure the feedback resistor network is placed close to the FB pin and use a wide-trace layout for the power ground to minimize switching noise.

Also Consider

MAX17222ELT+T Maxim Integrated - Provides a lower quiescent current of 300nA for ultra-long-life battery applications.
MCP1640T-I/CHY MCHPMicrochip Technology - A cost-effective alternative for lower current requirements with an integrated shutdown feature.

Categories

Power Management > Switching Regulators