LM2766

Switched Capacitor Voltage Converter

General Description

The LM2766 CMOS charge-pump voltage converter oper-

ates as a voltage doubler for an input voltage in the range of

+1.8V to +5.5V. Two low cost capacitors and a diode are

used in this circuit to provide up to 20 mA of output current.

The LM2766 operates at 200 kHz switching frequency to re-

duce output resistance and voltage ripple. With an operating

current of only 350 µA (operating efficiency greater than 90%

with most loads) and 0.1µA typical shutdown current, the

LM2766 provides ideal performance for battery powered

systems. The device is manufactured in a SOT-23-6 pack-

age.

Features

n

Doubles Input Supply Voltage

n

SOT23-6 Package

n

20

Ω Typical Output Impedance

n

90% Typical Conversion Efficiency at 20 mA

n

0.1µA Typical Shutdown Current

Applications

n

Cellular Phones

n

Pagers

n

PDAs

n

Operational Amplifier Power Supplies

n

Interface Power Supplies

n

Handheld Instruments

Basic Application Circuits

Connection Diagram

Ordering Information

Order Number

Package

Number

Package

Marking

Supplied as

LM2766M6

MA06A

S16B (Note 1)

Tape and Reel (1000 units/reel)

LM2766M6X

MA06A

S16B (Note 1)

Tape and Reel (3000 units/reel)

Note 1: The small physical size of the SOT-23 package does not allow for the full part number marking. Devices will be marked with the designation shown in

the column Package Marking.

Voltage Doubler

DS101282-1

6-Lead SOT (M6)

DS101282-13

Top View With Package Marking

DS101282-22

Actual Size

March 2000

© 2000 National Semiconductor Corporation

DS101282

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