Datasheet

LM2853

3A 550 kHz Synchronous SIMPLE SWITCHER

Buck

Regulator

General Description

The LM2853 synchronous SIMPLE SWITCHER

buck regu-

lator is a 550 kHz step-down switching voltage regulator

capable of driving up to a 3A load with excellent line and load

regulation. The LM2853 accepts an input voltage between

3.0V and 5.5V and delivers a customizable output voltage

that is factory programmable from 0.8V to 3.3V in 100mV

increments. Internal type-three compensation enables a low

component count solution and greatly simplifies external

component selection. The exposed-pad TSSOP-14 package

enhances the thermal performance of the LM2853.

Features

n Input voltage range of 3.0V to 5.5V

n Factory EEPROM set output voltages from 0.8V to 3.3V

in 100 mV increments

n Maximum load current of 3A

n Voltage Mode Control

n Internal type-three compensation

n Switching frequency of 550 kHz

n Low standby current of 12 µA

n Internal 40 mΩ MOSFET switches

n Standard voltage options

0.8/1.0/1.2/1.5/1.8/2.5/3.0/3.3 volts

n Exposed pad TSSOP-14 package

Applications

n Low voltage point of load regulation

n Local solution for FPGA/DSP/ASIC core power

n Broadband networking and communications

infrastructure

Typical Application Circuit

20201502

Efficiency vs Load Current (V

OUT

= 3.3V)

20201501

SIMPLE SWITCHER

is a Registered Trademark of National Semiconductor Corporation.

October 2006

LM2853 3A 550 kHz Synchronous SIMPLE SWITCHER

Buck Regulator