(3,25 mm x 3,25 mm)
SLVS577 – MARCH 2007
www.ti.com
LOW INPUT VOLTAGE SYNCHRONOUS BOOST CONVERTER
WITH 1.3-A SWITCHES
FEATURES
•
More than 90% Efficiency at
– 600 mA Output Current at 3.3 V
(VIN
≥
1.2 V)
– 600 mA Output Current at 5 V (VIN
≥
3 V)
Automatic Transition between Boost Mode
and Down Conversion Mode
Device Quiescent Current less than 55
µA
Startup into Full Load at 0.5 V Input Voltage
Operating Input Voltage Range from
0.3 V to 5.5 V
Programmable Undervoltage Lockout
Threshold
Output Short Circuit Protection Under all
Operating Conditions
Fixed and Adjustable Output Voltage Options
from 1.8 V to 5.5 V
•
•
•
•
•
•
•
•
•
•
•
•
Power Save Mode for Improved Efficiency at
Low Output Power
Forced fixed Frequency Operation possible
Load Disconnect During Shutdown
Overtemperature Protection
Small 3 mm x 3 mm QFN-10 Package
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APPLICATIONS
All Single-Cell, Two-Cell and Three-Cell
Alkaline, NiCd or NiMH or Single-Cell Li
Battery Powered Products
Fuel Cell And Solar Cell Powered Products
Portable Audio Players
PDAs
Cellular Phones
Personal Medical Products
White LED's
DESCRIPTION
The TPS6120x devices provide a power supply solution for products powered by either a single-cell, two-cell, or
three-cell alkaline, NiCd or NiMH, or one-cell Li-Ion or Li-polymer battery. It is also used in fuel cell or solar cell
powered devices where the capability of handling low input voltages is essential. Possible output currents are
depending on the input to output voltage ratio. The devices provides output currents up to 600 mA at a 5-V
output while using a single-cell Li-Ion or Li-Polymer battery, and discharge it down to 2.5 V. The 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 input current is limited to a value of 1500 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 (DRC) measuring 3 mm x 3 mm.
L
1
2.2
m
H
VIN
0.3 V to 5.5 V
C
1
10
m
F
VIN
EN
L
VOUT
VAUX
PS
UVLO
FB
GND
PGND
C
3
0.1
m
F
R1
C
2
10
m
F
VOUT
1.8 V to 5.5 V
R2
TPS61200
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 © 2007, Texas Instruments Incorporated
TI [ TEXAS INSTRUMENTS ]
