Input Voltage (V)

2.7

3.1

3.5

3.9

4.3

4.7

5.1

5.5

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

D005

VIN

EN

LM2776

GND

VOUT

C1+

C1-

2.2 2F

2.2 2F

1 2F

2.7 V to 5.5 V

-VIN @ up to 200mA

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LM2776

SNVSA56 – MAY 2015

LM2776 Switched Capacitor Inverter

1 Features

3 Description

The LM2776 CMOS charge-pump voltage converter

1

•

Input Voltage: 2.7 V to 5.5 V

inverts a positive voltage in the range of 2.7 V to 5.5

•

200-mA Output Current

V to the corresponding negative voltage. The LM2776

•

Inverts Input Supply Voltage

uses three low-cost capacitors to provide 200 mA of

output

current

without

the

cost,

size,

and

•

Low-Current PFM Mode Operation

electromagnetic

interference

(EMI)

related

to

•

2-MHz Switching Frequency

inductor-based converters.

•

Greater than 90% Efficiency

With an operating current of only 100

μA and

•

Current Limit and Thermal Protection

operating efficiency greater than 90% at most loads,

•

No Inductors

the LM2776 provides ideal performance for battery-

powered systems requiring a high power negative

2 Applications

power supply.

•

Operational Amplifier Power Supplies

The LM2776 has been placed in TI's 6-pin SOT-23 to

maintain a small form factor.

•

Interface Power Supplies

•

Data Converter Supplies

Device Information(1)

•

Audio Amplifier Power Supplies

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

Portable Electronic Devices

LM2776

SOT (6)

2.90 mm x 1.60 mm

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

the end of the datasheet.

space

space

space

Typical Application

Output Impedance vs Input Voltage

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.