LoadCurrent(mA)

90

80

70

60

50

40

30

1

10

100

0.1

V

=V

IN

OUT

V

=2.7V

IN

V

=4.2V

IN

V

=3.6V

IN

V

=3.3V

IN

V

=3V

IN

V

IN

Enable

V

OUT

GND

REG710

C

IN

2.2mF

C

OUT

2.2mF

C

PUMP

0.22mF

4

6

3

5

1

2

Product

Folder

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Reference

Design

REG71050, REG71055, REG710

SBAS221H – DECEMBER 2001 – REVISED OCTOBER 2015

REG710xx Buck-Boost Charge Pump with up to 60-mA Output Current

1 Features

3 Description

The REG710 family of devices are switched capacitor

1

•

Wide Input Voltage Range: 1.8 V to 5.5 V

voltage converters that generate regulated, low-ripple

•

Automatic Step-Up and Step-Down Operation

output voltage from an unregulated input voltage. A

•

Low Input Current Ripple

wide input supply voltage from 1.8 V to 5.5 V makes

the REG710 family of devices ideal for a variety of

•

Low Output Voltage Ripple

battery sources, such as single-cell Li-Ion, or 2-cell

•

Minimum Number of External Components—No

and 3-cell nickel-based or alkaline-based chemistries.

Inductors

The input voltage may vary above and below the

•

1-MHz Internal Oscillator Allows Small Capacitors

output voltage and the output remains in regulation.

•

Shutdown Mode

The device works as step-up or step-down converters

•

Thermal and Current Limit Protection

without the need of an inductor, providing low EMI

DC-DC conversion. The high switching frequency

•

Six Fixed Output Voltages Available:

allows the use of small surface-mount capacitors,

–

2.5 V, 2.7 V, 3 V, 3.3 V, 5 V, 5.5 V

saving board space and reducing cost. The REG710

device is thermally protected and current limited,

2 Applications

protecting the load and the regulator during fault

conditions. Typical ground pin current (quiescent

•

White LED Driver

current) is 65

μA with no load, and less than 1 μA in

•

Smart Card Readers

shutdown mode.

•

SIM Cards

•

Handheld devices

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

Modems

REG710

SOT-23 (6)

2.90 mm × 1.60 mm

•

PCMCIA Cards

SOT (6)

2.90 mm × 1.60 mm

•

LCD Displays

REG71050

SON (6)

2.00 mm × 2.00 mm

•

Battery Backup Supplies

REG71055

SOT-23 (6)

2.90 mm × 1.60 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

spacing

Typical Operating Circuit

Efficiency vs Load Current

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.