1 Features

1• Up to 93% Efficiency at Typical Operating

Conditions

• Connection from Battery to Load via Bypass

Switch in Shutdown Mode

• Typical Shutdown Current Less Than 5 nA

• Typical Quiescent Current Less Than 5 μA

• Operating Input Voltage Range

From 0.9 V to 5.5 V

• Power-Save Mode for Improved Efficiency at Low

Output Power

• Overtemperature Protection

• Small 2.8-mm x 2.9-mm 5-Pin SOT-23 Package

2 Applications

• MSP430 Applications

• All Single-Cell, Two-Cell, and Three-Cell Alkaline,

NiCd, NiMH, or Single-Cell Li-Battery Powered

Products

• Personal Medical Products

• Fuel Cell and Solar Cell Powered Products

• PDAs

• Mobile Applications

• White LEDs

3 Description

The TPS61097A-33 provides a power supply solution

for products powered by either a single-cell, two-cell,

or three-cell alkaline, NiCd, or NiMH, or one-cell Li-

Ion or Li-polymer battery. They can also be used in

fuel cell or solar cell powered devices where the

capability of handling low input voltages is essential.

Possible output currents depend on the input-tooutput

voltage ratio. The devices provide output

currents up to 100 mA at a 3.3-V output while using a

single-cell Li-Ion or Li-Polymer battery. The boost

converter is based on a current-mode controller using

synchronous rectification to obtain maximum

efficiency. The maximum average input current is

limited to a value of 400 mA. The converter can be

disabled to minimize battery drain. During shutdown,

the battery is connected to the load to enable battery

backup of critical functions on the load. The device is

packaged in a 5-pin SOT-23 package (DBV)

measuring 2.8 mm × 2.9 mm.