VIN

SW

BST

LM5010A

VCC

SS

RON/SD

6V - 75V

Input

C1

R2

R1

C2

L1

C3

C4

D1

C6

RTN

ISEN

SGND

FB

SHUTDOWN

R3

LM5010A

LM5010A-Q1

www.ti.com

SNVS376E – OCTOBER 2005 – REVISED FEBRUARY 2013

High-Voltage 1-A Step-Down Switching Regulator

Check for Samples: LM5010A, LM5010A-Q1

1

FEATURES

APPLICATIONS

2

•

Wide 6V to 75V Input Voltage Range

•

Non-Isolated Telecommunications Regulator

•

Valley Current Limiting At 1.25A

•

Secondary Side Post Regulator

•

Programmable Switching Frequency Up To 1

•

Automotive Electronics

MHz

DESCRIPTION

•

Integrated 80V N-Channel Buck Switch

The LM5010A Step-Down Switching Regulator is an

•

Integrated High Voltage Bias Regulator

enhanced version of the LM5010 with the input

•

No Loop Compensation Required

operating range extended to 6V minimum. The

•

Ultra-Fast Transient Response

LM5010A features all the functions needed to

implement a low cost, efficient, buck regulator

•

Nearly Constant Operating Frequency With

capable of supplying in excess of 1A load current.

Line and Load Variations

This high voltage regulator integrates an N-Channel

•

Adjustable Output Voltage

Buck Switch, and is available in thermally enhanced

•

2.5V, ±2% Feedback Reference

WSON-10 and HTSSOP-14 packages. The constant

on-time

regulation

scheme

requires

no

loop

•

Programmable Soft-Start

compensation

resulting

in

fast

load

transient

•

Thermal Shutdown

response and simplified circuit implementation. The

•

LM5010AQ is AEC-Q100 Grade 1 and 0

operating frequency remains constant with line and

qualified

load

variations

due

to

the

inverse

relationship

between the input voltage and the on-time. The valley

•

Packages

current limit detection is set at 1.25A. Additional

–

WSON-10 (4 mm x 4 mm)

features include: VCC under-voltage lock-out, thermal

–

HTSSOP-14

shutdown, gate drive under-voltage lock-out, and

maximum duty cycle limiter.

–

Both Packages Have Exposed Thermal Pad

For Improved Heat Dissipation

Basic Step-Down Regulator

1

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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 © 2005–2013, 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.