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TPS61200

TITPS61200

Texas Instruments
Widely used boost converter for low-voltage inputs with a small footprint and good efficiency for portable designs.
NRND11,276 in stock
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Overview

The TPS61200 is a high-efficiency synchronous boost converter designed for low-voltage power sources like single-cell alkaline, NiCd, or NiMH batteries. It features a remarkably low startup voltage of 0.5V and can operate down to 0.3V once running, making it ideal for extracting maximum energy from depleted cells. The device also includes a unique down-conversion mode that maintains regulation even when the input voltage exceeds the target output voltage.

Why Choose This Part

The TPS61200 offers a 1.2A switch current limit in a compact 3x3mm VSON package, providing high power density for portable designs. Its integrated 'Power Save Mode' maintains high efficiency during light loads, while the forced fixed-frequency mode allows for low-noise operation in sensitive analog or RF applications. Additionally, the integrated load disconnect prevents battery drain by completely isolating the output from the input during shutdown.

Applications

Single-Cell Battery Powered Systems
Boosting 0.9V to 1.5V alkaline or NiMH cells to a stable 3.3V or 5V rail for microcontrollers and sensors.
Solar Energy Harvesting
Efficiently converting low-voltage outputs from small indoor solar cells to charge storage capacitors or power low-power wireless nodes.
Portable Medical Devices
Providing a small footprint power solution for handheld instruments that require a wide input voltage range and load disconnect during shutdown.
Thermal Electric Generator (TEG) Power
Utilizing the 0.3V minimum operating voltage to harvest energy from low-delta temperature gradients.

Key Specifications

Function Step-Up
Topology Boost
Output Type Adjustable
Mounting Type Surface Mount
Package / Case 10-VFDFN Exposed Pad
Current - Output 1.2A (Switch)
Number of Outputs 1
Output Configuration Positive
Frequency - Switching 1.25MHz ~ 1.65MHz
Operating Temperature -40degC ~ 85degC (TA)
Synchronous Rectifier Yes
Voltage - Input (Max) 5.5V
Voltage - Input (Min) 0.3V
Voltage - Output (Max) 5.5V
Supplier Device Package 10-VSON (3x3)
Voltage - Output (Min/Fixed) 1.8V

Getting Started

Designers can evaluate the chip using the TPS61200EVM-179 evaluation module, which allows for testing the adjustable output and power save features. When designing the PCB, minimize the area of the power ground and use a short, wide trace for the feedback loop to ensure stability at the 1.25MHz to 1.65MHz switching frequency. Refer to the datasheet to program the undervoltage lockout (UVLO) threshold using an external resistor divider on the EN pin.

Also Consider

TPS61021A TITexas Instruments - Offers a lower 0.5V minimum operating voltage and higher 3A switch current for more demanding single-cell applications.
MAX17222 Maxim Integrated / Analog Devices - Provides an ultra-low 300nA quiescent current for always-on wearable devices with extremely light loads.
MCP1640 MCHPMicrochip Technology - A cost-effective alternative for lower current (350mA) applications that still require a 0.65V startup voltage.

Categories

Power Management > DC-DC Converters Wearables & Medical > Energy Harvesting