TPS63010_10 Datasheet, PDF (1/28 Pages) Texas Instruments – HIGHLY EFFICIENT,SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 2-A SWITCHES

TPS63010
TPS63011
TPS63012
www.ti.com ........................................................................................................................................................ SLVS653A – JUNE 2008 – REVISED AUGUST 2009
HIGHLY EFFICIENT, SINGLE INDUCTOR BUCK-BOOST CONVERTER WITH 2-A
SWITCHES
FEATURES
1
• 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 50µA
• Input Voltage Range: 2 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
• Output Overvoltage Protection
• Overtemperature Protection
• Available in Small 20 pin 2.14 mm x 1.93 mm,
WCSP 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 TPS6301x 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 2200 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 20-pin WCSP package measuring
2.14 mm x 1.93 mm (YFF).
V_IN
1.8 V to
5.5 V
Typical Application Circuit
L1
1.5 µH
C1
10 µF
L1
VIN
VINA
EN
PS
VSEL
SYNC
L2
VOUT
FB
GND PGND
TPS63011
C2
10 µF
V_OUT
3.3 V
Up to
1200 mA
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 © 2008–2009, Texas Instruments Incorporated