+

+

+

BST

RON

RTN

SW

VCC

FB

VIN

VOUT

L1

UVLO

LM5017

9V-100V

1

2

3

4

5

6

8

7

SD

LM5017

www.ti.com

SNVS783D – JANUARY 2012 – REVISED MAY 2013

LM5017 100V, 600mA Constant On-Time Synchronous Buck Regulator

Check for Samples: LM5017

1

FEATURES

PACKAGES

2

•

Wide 9V to 100V Input Range

•

WSON-8

•

Integrated 100V, High and Low Side Switches

•

SO PowerPAD-8

•

No Schottky Required

DESCRIPTION

•

Constant On-time Control

The LM5017 is a 100V, 600mA synchronous step-

•

No Loop Compensation Required

down regulator with integrated high side and low side

•

Ultra-Fast Transient Response

MOSFETs.

The

constant-on-time

(COT)

control

scheme employed in the LM5017 requires no loop

•

Nearly Constant Operating Frequency

compensation, provides excellent transient response,

•

Intelligent Peak Current Limit

and enables very low step-down ratios. The on-time

•

Adjustable Output Voltage from 1.225V

varies inversely with the input voltage resulting in

nearly constant frequency over the input voltage

•

Precision 2% Feedback Reference

range. A high voltage startup regulator provides bias

•

Frequency Adjustable to 1MHz

power for internal operation of the IC and for

•

Adjustable Undervoltage Lockout (UVLO)

integrated gate drivers.

•

Remote Shutdown

A peak current limit circuit protects against overload

•

Thermal Shutdown

conditions. The undervoltage lockout (UVLO) circuit

allows

the

input

undervoltage

threshold

and

APPLICATIONS

hysteresis to be independently programmed. Other

protection features include thermal shutdown and

•

Smart Power Meters

•

Telecommunication Systems

The LM5017 is available in WSON-8 and SO

•

Automotive Electronics

PowerPAD-8 plastic packages.

•

Isolated Bias Supply

Typical Application

1

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 © 2012–2013, 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.