LM26001MXASLASHNOPB中文资料德州仪器数据手册PDF规格书

1 Features

1• LM26001-Q1 is an Automotive-Grade Product that

is AEC-Q100 Grade 1 Qualified (–40°C to +125°C

Operating Junction Temperature)

• High-Efficiency Sleep Mode

• 40-μA Typical Iq in Sleep Mode

• 10-μA Typical Iq in Shutdown Mode

• 3.0-V Minimum Input Voltage

• 4.0-V to 38-V Continuous Input Range

• 1.5% 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

• HTSSOP-16 Exposed Pad Package

• Thermal Shut Down

2 Applications

• Automotive Telematics

• Navigation Systems

• In-Dash Instrumentation

• Battery-Powered Applications

• Standby Power for Home Gateways/Set-top

Boxes

3 Description

The LM26001 is a switching regulator designed for

the high-efficiency requirements of applications with

standby modes. The device features a low-current sleep mode to maintain efficiency under light-load

conditions and current-mode control for accurate

regulation over a wide input voltage range. Quiescent

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 LM26001 can deliver up to 1.5 A of continuous

load current with a fixed current limit, through the

internal N-channel switch. The part has a wide input

voltage range of 4.0 V to 38 V and can operate with

input voltages as low as 3 V 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, enable pin, input undervoltage protection, and

an internal bootstrap diode for reduced component

count.