GND

FB

EN

SW

C1

R3

D1

L1

R2

R1

C2

C3

LM2832

LM2832

www.ti.com

SNVS455 – AUGUST 2006

LM2832 High Frequency 2.0A Load - Step-Down DC-DC Regulator

Check for Samples: LM2832

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FEATURES

•

Current mode, PWM operation

•

Thermal Shutdown

2

•

Input voltage range of 3.0V to 5.5V

•

Over voltage protection

•

Output voltage range of 0.6V to 4.5V

•

2.0A output current

APPLICATIONS

•

High Switching Frequencies

•

Local 5V to Vcore Step-Down Converters

–

1.6MHz (LM2832X)

•

Core Power in HDDs

–

0.55MHz (LM2832Y)

•

Set-Top Boxes

–

3.0MHz (LM2832Z)

•

USB Powered Devices

•

150m

Ω PMOS switch

•

DSL Modems

•

0.6V, 2% Internal Voltage Reference

•

Internal soft-start

DESCRIPTION

The LM2832 regulator is a monolithic, high frequency, PWM step-down DC/DC converter in a 6 Pin LLP and a 8

Pin eMSOP package. It provides all the active functions to provide local DC/DC conversion with fast transient

response and accurate regulation in the smallest possible PCB area. With a minimum of external components,

the LM2832 is easy to use. The ability to drive 2.0A loads with an internal 150 m

Ω PMOS switch using state-of-

the-art 0.5 µm BiCMOS technology results in the best power density available. The world-class control circuitry

allows on-times as low as 30ns, thus supporting exceptionally high frequency conversion over the entire 3V to

5.5V input operating range down to the minimum output voltage of 0.6V. Switching frequency is internally set to

550 kHz, 1.6 MHz, or 3.0 MHz, allowing the use of extremely small surface mount inductors and chip capacitors.

Even though the operating frequency is high, efficiencies up to 93% are easy to achieve. External shutdown is

included, featuring an ultra-low stand-by current of 30 nA. The LM2832 utilizes current-mode control and internal

compensation to provide high-performance regulation over a wide range of operating conditions. Additional

features include internal soft-start circuitry to reduce inrush current, pulse-by-pulse current limit, thermal

shutdown, and output over-voltage protection.

Typical Application Circuit

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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

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

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2006, 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.