LM26480

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SNVS543I – JANUARY 2008 – REVISED MAY 2013

LM26480 Externally Programmable Dual High-Current Step-Down DC/DC and Dual Linear

Regulators

Check for Samples: LM26480

1

FEATURES

DESCRIPTION

The

LM26480

is

a

multi-functional

Power

2

•

Compatible with Advanced Applications

Management Unit, optimized for low-power digital

Processors and FPGAs

applications.

This

device

integrates

two

highly

•

2 LDOs for Powering Internal Processor

efficient 1.5A step-down DC/DC converters and two

Functions and I/Os

300 mA linear regulators. The LM26480 is offered in

a tiny 4 x 4 x 0.8mm WQFN-24 pin package.

•

Precision Internal Reference

•

Thermal Overload Protection

KEY SPECIFICATIONS

•

Current Overload Protection

•

Step-Down DC/DC Converter (Buck)

•

24-lead 4 × 4 × 0.8mm WQFN Package

–

1.5A output current

•

External Power-On-Reset Function for Buck1

–

and Buck2

–

Buck1 : 0.8V–2.0V @ 1.5A

•

Undervoltage Lock-Out Detector to Monitor

Input Supply Voltage

–

Buck2 : 1.0V–3.3V @ 1.5A

•

Note: LM26480Q is an Automotive-Grade

–

Up to 96% efficiency

Product that is AECQ-100 Grade 1 Qualified.

–

±3% FB voltage accuracy

–

2 MHz PWM switching frequency

APPLICATIONS

–

PWM - PFM automatic mode change under

•

Core Digital Power

low loads

•

Applications Processors

–

Automatic soft start

•

Peripheral I/O Power

•

Linear Regulators (LDO)

–

–

±3% FB voltage accuracy

–

300 mA output current

–

25 mV (typ) dropout

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

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PRODUCTION DATA information is current as of publication date.

Copyright © 2008–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.