Datasheet
1
FEATURES
DESCRIPTION
APPLICATIONS
SW
C1
10 µF
L1
4.7
µ
H
VBAT
VOUT
FB
C2
10 µF
EN
GND
TPS61070
V
O
3.3VUp To
100mA
R1
R2
0.9-V T
oV
O
TPS61070 , TPS61071
TPS61072 , TPS61073
www.ti.com
.......................................................................................................................................................... SLVS510C – JULY 2006 – REVISED MARCH 2009
90% EFFICIENT SYNCHRONOUS BOOST CONVERTER WITH 600-mA SWITCH
• 90% Efficient Synchronous Boost Converter
– 75-mA Output Current at 3.3 V From 0.9-V
The TPS6107x devices provide a power supply
solution for products powered by either a one-cell,
Input
two-cell, or three-cell alkaline, NiCd or NiMH, or
– 150-mA Output Current at 3.3 V From 1.8-V
one-cell Li-ion or Li-polymer battery. Output currents
Input
can go as high as 75 mA while using a single-cell
• Device Quiescent Current: 19 µ A (Typ)
alkaline, and discharge it down to 0.9 V. It can also
be used for generating 5 V at 200 mA from a 3.3 V
• Input Voltage Range: 0.9 V to 5.5 V
rail or a Li-ion battery. The boost converter is based
• Adjustable Output Voltage Up to 5.5 V
on a fixed frequency, pulse-width-modulation (PWM)
• Power-Save Mode Version Available for
controller using a synchronous rectifier to obtain
Improved Efficiency at Low Output Power
maximum efficiency. At low load currents the
TPS61070 and TPS61073 enter the power-save
• Load Disconnect During Shutdown
mode to maintain a high efficiency over a wide load
• Overtemperature Protection
current range. The power-save mode is disabled in
• Small 6-Pin Thin SOT23 Package
the TPS61071 and TPS61072, forcing the converters
to operate at a fixed switching frequency. The
maximum peak current in the boost switch is typically
limited to a value of 600 mA.
• All One-Cell, Two-Cell, and Three-Cell Alkaline,
NiCd or NiMH or Single-Cell Li
The TPS6107x output voltage is programmed by an
Battery-Powered Products
external resistor divider. The converter can be
• Portable Audio Players
disabled to minimize battery drain. During shutdown,
the load is completely disconnected from the battery.
• PDAs
The device is packaged in a 6-pin thin SOT23
• Cellular Phones
package (DDC).
• Personal Medical Products
• White LED Lighting
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.
Copyright © 2006 – 2009, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.