TPS63000-Q1 Datasheet, PDF (1/19 Pages) Texas Instruments – HIGH-EFFICIENCY SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 1.8-A SWITCH

TPS63000-Q1
www.ti.com ...................................................................................................................................................................................................... SLVS968 – JUNE 2009
HIGH-EFFICIENCY SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 1.8-A SWITCH
FEATURES
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•23 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 µA
• 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
• Load Disconnect During Shutdown
• Over-Temperature Protection
• Available in Small 3 mm × 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
efficiency over a wide load current range. The Power Save mode can be disabled, forcing the converter to
operate at a fixed switching frequency. The maximum average current in the switches is limited to a typical value
of 1800 mA. The output voltage is programmable using an external resistor divider. The converter can be
disabled to minimize battery drain. During shutdown, the load is disconnected from the battery. The device is
packaged in a 10-pin QFN PowerPAD™ package measuring 3 mm × 3 mm (DRC).
L1
2.2µH
V_IN
1.8V to
5.5V
C1
10µF
L1
L2
VIN
VINA
VOUT
EN
FB
PS/SYNC
GND PGND
TPS63000
C2
10µF
V_OUT
3.3V up to
1200mA
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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.
PowerPAD is a trademark of Texas Instruments.
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All other trademarks are the property of their respective owners.
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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