LM2663M National Semiconductor, LM2663M Datasheet

LM2663M

Manufacturer Part Number

LM2663M

Description

DC/DC Charge Pump Converter IC

Manufacturer

National Semiconductor

Datasheets

1.LM2662-MDC.pdf (12 pages)

2.LM2663M.pdf (12 pages)

3.LM2663M.pdf (12 pages)

Specifications of LM2663M

Output Current

200mA

No. Of Pins

Power Dissipation Pd

735mW

Mounting Type

Surface Mount

Peak Reflow Compatible (260 C)

Supply Voltage Max

5.5V

Leaded Process Compatible

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

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LM2662/LM2663

Switched Capacitor Voltage Converter

General Description

The LM2662/LM2663 CMOS charge-pump voltage con-

verter inverts a positive voltage in the range of 1.5V to 5.5V

to the corresponding negative voltage. The LM2662/LM2663

uses two low cost capacitors to provide 200 mA of output

current without the cost, size, and EMI related to inductor

based converters. With an operating current of only 300 µA

and operating efficiency greater than 90% at most loads, the

LM2662/LM2663 provides ideal performance for battery

powered systems. The LM2662/LM2663 may also be used

as a positive voltage doubler.

The oscillator frequency can be lowered by adding an exter-

nal capacitor to the OSC pin. Also, the OSC pin may be used

to drive the LM2662/LM2663 with an external clock. For

LM2662, a frequency control (FC) pin selects the oscillator

frequency of 20 kHz or 150 kHz. For LM2663, an external

shutdown (SD) pin replaces the FC pin. The SD pin can be

used to disable the device and reduce the quiescent current

to 10 µA. The oscillator frequency for LM2663 is 150 kHz.

Basic Application Circuits

Voltage Inverter

DS100003

10000301

Splitting V

Features

n Inverts or doubles input supply voltage

n Narrow SO-8 Package

n 3.5Ω typical output resistance

n 86% typical conversion efficiency at 200 mA

n (LM2662) selectable oscillator

n (LM2663) low current shutdown mode

Applications

n Laptop computers

n Cellular phones

n Medical instruments

n Operational amplifier power supplies

n Interface power supplies

n Handheld instruments

in Half

frequency: 20 kHz/150 kHz

Positive Voltage Doubler

10000303

January 1999

www.national.com

10000302

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