lm26480sqx-bf National Semiconductor Corporation, lm26480sqx-bf Datasheet

lm26480sqx-bf

Manufacturer Part Number

lm26480sqx-bf

Description

Lm26480 Externally Programmable Dual High-current Step-down Dc/dc And Dual Linear Regulators

Manufacturer

National Semiconductor Corporation

Datasheet

1.LM26480SQX-BF.pdf (30 pages)

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Externally Programmable Dual High-Current Step-Down

DC/DC and Dual Linear Regulators

General Description

The LM26480 is a multi-functional Power Management Unit,

optimized for low-power digital applications. This device inte-

grates two highly efficient 1.5A step-down DC/DC converters

and two 300 mA linear regulators. The LM26480 is offered in

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

Key Specifications

Step-Down DC/DC Converter (Buck)

■

Typical Application Circuit

1.5A output current

— Buck1 : 0.8V–2.0V @ 1.5A

— Buck2 : 1.0V–3.3V @ 1.5A

Up to 96% efficiency

±3% FB voltage accuracy

2 MHz PWM switching frequency

PWM - PFM automatic mode change under low loads

Automatic soft start

OUT

from:

300404

LM26480

Linear Regulators (LDO)

■

Features

■

Applications

■

±3% FB voltage accuracy

300 mA output current

25 mV (typ) dropout

Compatible with advanced applications processors and

FPGAs

2 LDOs for powering Internal processor functions and I/Os

Precision internal reference

Thermal overload protection

Current overload protection

24-lead 4 × 4 × 0.8mm LLP package

External Power-On-Reset function for Buck1 and Buck2

Undervoltage lock-out detector to monitor input supply

voltage

Core digital power

Applications processors

Peripheral I/O power

OUT

of 1.0V–3.5V

30040401

March 29, 2010

www.national.com

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