LM26001BMHX datasheet(1/18 Pages) NSC

No. de pieza	LM26001BMHX

Descripción Electrónicos	1.5A Switching Regulator with High Efficiency Sleep Mode

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Fabricante Electrónico	NSC [National Semiconductor (TI)]

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May 29, 2008

LM26001B

1.5A Switching Regulator with High Efficiency Sleep Mode

General Description

The LM26001B is a switching regulator designed for the high

efficiency requirements of applications with stand-by modes.

The device features a low-current sleep mode to maintain ef-

ficiency under light-load conditions and current-mode control

for accurate regulation over a wide input voltage range. Qui-

escent current is reduced to 10 µA typically in shutdown mode

and less than 40 µA in sleep mode. Forced PWM mode is also

available to disable sleep mode.

The LM26001B can deliver up to 1.5A of continuous load cur-

rent with a fixed current limit, through the internal N-channel

switch. The part has a wide input voltage range of 4.0V to 18V

and can operate with input voltages as low as 3V during line

transients.

Operating frequency is adjustable from 150 kHz to 500 kHz

with a single resistor and can be synchronized to an external

clock.

Other features include Power good, adjustable soft-start, en-

able pin, input under-voltage protection, and an internal boot-

strap diode for reduced component count.

Features

■ High efficiency sleep mode

■ 40 µA typical Iq in sleep mode

■ 10 µA typical Iq in shutdown mode

■ 3.0V minimum input voltage

■ 4.0V to 18V continuous input range

■ 2.0% reference accuracy

■ Cycle-by-cycle current limit

■ Adjustable Frequency (150 kHz to 500 kHz)

■ Synchronizable to an external clock

■ Power Good Flag

■ Forced PWM function

■ Adjustable Soft-start

■ TSSOP-16 exposed pad package

■ Thermal Shut Down

Applications

■ Automotive Telematics

■ Navigation systems

■ In-Dash Instrumentation

■ Battery Powered Applications

■ Stand-by power for home gateways/set-top boxes

Typical Application Circuit

30001901

300019

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LM26001BMHX Datasheet(PDF) 1 Page - National Semiconductor (TI)

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