REG710
www.ti.com........................................................................................................................................... SBAS221G – DECEMBER 2001 – REVISED JANUARY 2009
60mA, 5.0V, Buck/Boost Charge Pump
in ThinSOT-23 and ThinQFN
FEATURES
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Wide Input Range: 1.8V to 5.5V
Automatic Step-Up/Step-Down Operation
Low Input Current Ripple
Low Output Voltage Ripple
Minimum Number of External
Components—No Inductors
1MHz Internal Oscillator Allows Small
Capacitors
Shutdown Mode
Thermal and Current Limit Protection
Six Output Voltages Available:
– 5.5V, 5.0V, 3.3V, 3.0V, 2.7V, 2.5V
Small Packages:
– SOT23-6
– TSOT23-6 (REG71055 and REG71050 Only)
– TQFN-6 (2×2×0.8mm; REG71050 Only)
Evaluation Modules Available:
– REG710EVM-33, REG710EVM-5
APPLICATIONS
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Smart Card Readers
SIM Card Supplies
Cellular Phones
Portable Communication Devices
Personal Digital Assistants
Notebook and Palm-Top Computers
Modems
Electronic Games
Handheld Meters
PCMCIA Cards
Card Buses
White LED Drivers
LCD Displays
Battery Backup Supplies
DESCRIPTION
The REG710 is a switched capacitor voltage
converter that produces a regulated, low-ripple output
voltage from an unregulated input voltage. A wide
input supply voltage of 1.8V to 5.5V makes the
REG710 ideal for a variety of battery sources, such
as single-cell Li-Ion, or two- and three-cell nickel- or
alkaline-based chemistries.
The input voltage may vary above and below the
output voltage and the output remains in regulation. It
works equally well for step-up or step-down
applications without the need for an inductor,
providing low EMI dc/dc conversion. The high
switching frequency allows the use of small
surface-mount capacitors, saving board space and
reducing cost. The REG710 is thermally protected
and current limited, protecting the load and the
regulator during fault conditions. Typical ground pin
current (quiescent current) is 65µA with no load, and
less than 1µA in shutdown mode.
CPUMP
0.22mF
Enable
3.3V to
4.2V
REG71050
REG710-5
CIN
2.2mF
R
R
R
LED
LED
LED
COUT
2.2mF
GND
REG710 Used in White LED Backlight Application
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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.
All trademarks are the property of their respective owners.
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 © 2001–2009, Texas Instruments Incorporated
