SBAS221E − DECEMBER 2001 − REVISED SEPTEMBER 2003

60mA SwitchedCap

BUCK/BOOST CONVERTER

REG710

FEATURES

Components

No Inductors

Capacitors

5.5V, 5.0V, 3.3V, 3.0V, 2.7V, 2.5V

− SOT23-6

− TSOT23-6 (REG71055 and REG71050 Only)

REG710EVM-33, REG710EVM-5

APPLICATIONS

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 will remain 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 65

µA with no load, and less than 1µA in

shutdown mode. The 5.5V version of the REG710 is

available in a thin TSOT23-6 package. All other versions

are available in a small SOT23-6 package.

REG710 Used in White LED Backlight Application

C

IN

2.2

µF

C

PUMP

0.22

µF

3.3V to

4.2V

C

OUT

2.2

µF

R

LED

GND

Enable

REG71050

REG710−5

LED

LED

RR

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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.

PRODUCTION DATA information is 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

 2001−2003, Texas Instruments Incorporated