Datasheet Texas Instruments TPS63000IDRCRQ1 — 数据表

TPS63000-Q1
www.ti.com . SLVS968 – JUNE 2009 HIGH-EFFICIENCY SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 1.8-A SWITCH
FEATURES 1 Qualified for Automotive Applications Up to 96% Efficiency 1200-mA Output Current at 3.3 V in Step Down
Mode (VIN = 3.6 V to 5.5 V) Up to 800-mA Output Current at 3.3 V in Boost
Mode (VIN > 2.4 V) Automatic Transition between Step Down and
Boost Mode Device Quiescent Current Less Than 50 ВµA Input Voltage Range: 1.8 V to 5.5 V Adjustable Output Voltage From 1.2 V to 5.5 V Power Save Mode for Improved Efficiency at
Low Output Power Forced Fixed Frequency Operation and
Synchronization Possible 23 Load Disconnect During Shutdown
Over-Temperature Protection
Available in Small 3 mm Г— 3 mm, QFN-10
Package APPLICATIONS All Two-Cell and Three-Cell Alkaline, NiCd or
NiMH or Single-Cell Li Battery Powered
Products
Portable Audio Players
PDAs
Cellular Phones
Personal Medical Products
White LEDs DESCRIPTION
The TPS63000 devices provide a power supply solution for products powered by either a two-cell or three-cell
alkaline, NiCd or NiMH battery, or a one-cell Li-Ion or Li-polymer battery. Output currents can go as high as 1200
mA while using a single-cell Li-Ion or Li-Polymer battery, and discharge it down to 2.5 V or lower. The buck-boost
converter is based on a fixed frequency, pulse-width-modulation (PWM) controller using synchronous rectification
to obtain maximum efficiency. At low load currents, the converter enters Power Save mode to maintain high …