TPS61070 Datasheet, PDF (1/21 Pages) Texas Instruments – 90% EFFICIENT SYNCHRONOUS BOOST CONVERTER WITH 600-mA SWITCH

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TPS61070, TPS61071
TPS61072, TPS61073
SLVS510A – JULY 2006 – REVISED JANUARY 2007
90% EFFICIENT SYNCHRONOUS BOOST CONVERTER WITH 600-mA SWITCH
FEATURES
• 90% Efficient Synchronous Boost Converter
– 75-mA Output Current at 3.3 V From 0.9-V
Input
– 150-mA Output Current at 3.3 V From 1.8-V
Input
• Device Quiescent Current: 19 µA (Typ)
• Input Voltage Range: 0.9 V to 5.5 V
• Adjustable Output Voltage Up to 5.5 V
• Power-Save Mode Version Available for
Improved Efficiency at Low Output Power
• Load Disconnect During Shutdown
• Overtemperature Protection
• Small 6-Pin Thin SOT23 Package
APPLICATIONS
• All One-Cell, 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 Lighting
DESCRIPTION
The TPS6107x devices provide a power supply
solution for products powered by either a one-cell,
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 75 mA while using a single-cell
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
rail or a Li-ion battery. The boost converter is based
on a fixed frequency, pulse-width-modulation (PWM)
controller using a synchronous rectifier to obtain
maximum efficiency. At low load currents the
TPS61070 and TPS61073⁽¹⁾ enter the power-save
mode to maintain a high efficiency over a wide load
current range. The power-save mode is disabled in
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.
The TPS6107x output voltage is programmed by an
external resistor divider. 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 6-pin thin SOT23
package (DDC).
(1) TPS61073 is in Product Preview status.
L1
4.7 µH
SW ^VOUT
VBAT
FB
V_O
R1
C2 _{3.3 V Up To}
10 µF _{100 mA}
0.9-V To V_O
C1
EN
R2
10 µF
GND
TPS61070
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.
UNLESS OTHERWISE NOTED this document contains
PRODUCTION DATA information current as of publication date.
Products conform to specifications per the terms of Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006–2007, Texas Instruments Incorporated