LM2757

VIN

C2+

C2-

1 µF

0.47 µF

VOUT

1 µF

C1+

C1-

0.47 µF

*Bump D1 is No Connect (NC)

B2,B3

A3

B1

A1

C3

C1,C2

A2

GND

5 V (180 mA)

M0

D3

M1

D2

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LM2757

SNVS536F – OCTOBER 2007 – REVISED JULY 2015

LM2757 Switched-Capacitor Boost Regulator With High Impedance Output in Shutdown

1 Features

3 Description

The LM2757 is a constant-frequency pre-regulated

1

•

Dual Gain Converter (2×, 3/2×) With up to 93%

switched-capacitor charge pump that operates at

Efficiency

1.25 MHz to produce a low-noise regulated output

•

Inductorless Solution Uses Only 4 Small Ceramic

voltage. The device can be configured to provide up

Capacitors

to 100 mA at 4.1 V, 110 mA at 4.5 V, or 180 mA at 5

•

V. Excellent efficiency is achieved without the use of

an inductor by operating the charge pump in a gain of

•

True Input-Output and Output-Input Disconnect

either 3/2 or 2 according to the input voltage and

•

Up to 180-mA Output Current Capability (5 V)

output voltage option selection.

•

Selectable 4.1-V, 4.5-V or 5-V Output

•

Pre-Regulation Minimizes Input Current Ripple

pin

when

shut

down.

This

allows

for

use

in

•

1.24-MHz Switching Frequency for Low-Noise,

applications that require the regulated output bus to

Low-Ripple Output Voltage

be driven by another supply while the LM2757 is shut

down.

•

Integrated Overcurrent and Thermal Shutdown

Protection

The LM2757 device comes in a tiny 12-pin 0.4-mm

pitch DSBGA package. A perfect fit for space-

2 Applications

constrained, battery-operated applications, the device

requires

only

4

small,

inexpensive

ceramic

•

USB/USB-OTG/HDMI Power

capacitors. Built-in soft-start, overcurrent protection,

•

Supercapacitor Charger

and thermal shutdown features are also included in

this device.

•

Keypad LED Drive

•

Audio Amplifier Power Supply

Device Information(1)

•

Low-Current Camera Flash

PART NUMBER

PACKAGE

BODY SIZE (MAX)

•

General Purpose Li-Ion-to-5-V Conversion

LM2757

DSBGA (12)

1.641 mm × 1.581 mm

•

Cellular Phone SIM Cards

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

the end of the data sheet.

Typical Application

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.