LM2776

更新时间： 2024-09-25 12:56:39

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德州仪器 - TI		/
页数	文件大小	规格书
23页	1733K
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LM2776 Switched Capacitor Inverter

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LM2776

SNVSA56 –MAY 2015

LM2776 Switched Capacitor Inverter

1 Features

3 Description

The LM2776 CMOS charge-pump voltage converter

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

V to the corresponding negative voltage. The LM2776

uses three low-cost capacitors to provide 200 mA of

output current without the cost, size, and

electromagnetic interference (EMI) related to

inductor-based converters.

•

Input Voltage: 2.7 V to 5.5 V

200-mA Output Current

Inverts Input Supply Voltage

Low-Current PFM Mode Operation

2-MHz Switching Frequency

Greater than 90% Efficiency

Current Limit and Thermal Protection

No Inductors

With an operating current of only 100 μA and

operating efficiency greater than 90% at most loads,

the LM2776 provides ideal performance for battery-

powered systems requiring a high power negative

power supply.

2 Applications

•

Operational Amplifier Power Supplies

Interface Power Supplies

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

maintain a small form factor.

Data Converter Supplies

Device Information⁽¹⁾

Audio Amplifier Power Supplies

Portable Electronic Devices

PART NUMBER

LM2776

PACKAGE

BODY SIZE (NOM)

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

Typical Application

Output Impedance vs Input Voltage

I_OUT= 100 mA

LM2776

2.7 V to 5.5 V

-VIN @ up to 200mA

2.2 PF

5.0

VIN

VOUT

C1+

T_A= -40°C

T_A= 25°C

4.5

2.2 PF

T_A= 85°C

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.0

1 PF

GND

C1-

2.7

3.1

3.5

3.9

4.3

4.7

5.1

5.5

Input Voltage (V)

D005

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.

12 3 4 5 6 7...23

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