TPS61097 Datasheet, PDF (1/27 Pages) Texas Instruments – LOW INPUT VOLTAGE SYNCHRONOUS BOOST CONVERTER WITH LOW QUIESCENT CURRENT

TPS61097
www.ti.com .............................................................................................................................................................. SLVS872A – JUNE 2009 – REVISED JULY 2009
LOW INPUT VOLTAGE SYNCHRONOUS BOOST CONVERTER
WITH LOW QUIESCENT CURRENT
FEATURES
1
• Up to 95% 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
• Fixed Output Voltage Options
From 1.8 V to 5.0 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
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
DESCRIPTION
The TPS61097 provide 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-to-output voltage ratio. The devices provides 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 350 mA. The output voltage can be programmed by an external resistor
divider, or it is fixed internally on the chip. 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.
V
IN
0.9 V to 3.3 V
TPS61097-33
L
L1
VOUT
VIN
V
OUT
3.3 V
C2
C1
EN
GND
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2009, Texas Instruments Incorporated