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TPS61221DCKT

TITPS61221DCKT

Texas Instruments
Boost Switching Regulator IC Positive Fixed 3.3V 1 Output 200mA (Switch) 6-TSSOP, SC-88, SOT-363
Active2,565 in stock
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Overview

The TPS61221DCKT is a high-efficiency synchronous boost regulator from Texas Instruments that provides a fixed 3.3V output from an input voltage as low as 0.7V. Designed for low-power applications, it features an ultra-low quiescent current of 7.5 microamps and can operate from single-cell alkaline, NiCd, or NiMH batteries. Its high switching frequency of up to 2MHz allows for the use of small surface-mount inductors and capacitors.

Why Choose This Part

This regulator offers exceptional efficiency at light loads due to its low 7.5 microamp quiescent current. It includes a unique pass-through function during shutdown that can be used to maintain a connection between input and output, along with integrated safety features like overtemperature protection and undervoltage lockout.

Applications

Single-Cell Battery Powered Devices
Ideal for boosting voltage from a single AA or AAA alkaline battery to a stable 3.3V rail for microcontrollers.
Energy Harvesting Systems
Utilizes the low 0.7V minimum input voltage to harvest energy from low-voltage sources like solar cells or thermal generators.
Portable Medical Equipment
Provides a compact power solution for blood glucose meters and other handheld diagnostic tools requiring a small footprint.
Wearable Electronics
The tiny SC-70 package and low external component count make it suitable for space-constrained wearable sensors.

Key Specifications

Function Step-Up
Topology Boost
Output Type Fixed
Mounting Type Surface Mount
Package / Case 6-TSSOP, SC-88, SOT-363
Current - Output 200mA (Switch)
Number of Outputs 1
Output Configuration Positive
Frequency - Switching Up to 2MHz
Operating Temperature -40degC ~ 125degC (TJ)
Synchronous Rectifier Yes
Voltage - Input (Max) 5.5V
Voltage - Input (Min) 0.7V
Supplier Device Package SC-70-6
Voltage - Output (Min/Fixed) 3.3V

Getting Started

To evaluate this part, use the TPS61221EVM-319 evaluation module which provides a reference layout and test points for efficiency measurements. Ensure that the input and output capacitors are placed as close as possible to the SC-70 package pins to minimize parasitic inductance, as the device operates at frequencies up to 2MHz.

Also Consider

MCP1640 MCHPMicrochip Technology - Offers a lower 0.65V start-up voltage and is a common alternative for single-cell boost applications.
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