(3,25 mm x 3,25 mm)
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SLVS520B – MARCH 2006 – REVISED JULY 2008
HIGH EFFICIENT SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 1.8-A SWITCHES
1
FEATURES
APPLICATIONS
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•
•
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•
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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
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Up to 96% Efficiency
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1200-mA Output Current at 3.3V in Step Down
Mode (VIN = 3.6V to 5.5V)
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Up to 800-mA Output Current at 3.3V in Boost
Mode (VIN > 2.4V)
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Automatic Transition between Step Down and
Boost Mode
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Device Quiescent Current less than 50µA
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Input Voltage Range: 1.8V to 5.5V
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Fixed and Adjustable Output Voltage Options
from 1.2V to 5.5V
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Power Save Mode for Improved Efficiency at
Low Output Power
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Forced Fixed Frequency Operation and
Synchronization possible
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Load Disconnect During Shutdown
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Over-Temperature Protection
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Available in Small 3 mm × 3 mm, QFN-10
Package
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DESCRIPTION
The TPS6300x 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
2.5V 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, or is
fixed internally on the chip. 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
L1
V
IN
1.8V to
5.5V
VIN
C1
10µF
VINA
EN
PS/SYNC
GND
L2
VOUT
C2
10µF
V
OUT
3.3V up to
1200mA
FB
PGND
TPS63001
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2
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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.
All other trademarks are the property of their respective owners.
Copyright © 2006–2008, Texas Instruments Incorporated
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.
TI [ TEXAS INSTRUMENTS ]
