(3,25 mm x 3,25 mm)
SLVS520 – MARCH 2006
www.ti.com
HIGH EFFICIENT SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 1.8-A
SWITCHES
FEATURES
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Up to 95% Efficiency
1200-mA Output Current at 3.3 V in Step Down
Mode (VIN 3.6 V...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
Fixed and Adjustable Output Voltage Options
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 x 3 mm, QFN-10
Package
DESCRIPTION
The TPS6300x devices provide a power supply
solution for products powered by either a two-cell, or
three-cell alkaline, NiCd or NiMH, or 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
the Power Save mode to maintain a 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 can be
programmed by 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 completely disconnected from the battery.
The device is packaged in a 10-pin QFN
PowerPAD™package measuring 3 mm x 3 mm
(DRC).
APPLICATIONS
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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 LED`s
L1
2.2 µF
L1
V
IN
1.8 V to
5.5 V
VIN
C1
10 µF
R3
VINA
EN
C3
PS/SYNC
GND
PGND
FB
R2
L2
VOUT
R1
C2
10 µF
V
OUT
3.3 V up to
1200 mA
TPS63000
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.
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 © 2006, Texas Instruments Incorporated
TI [ TEXAS INSTRUMENTS ]
