LM25007

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SNVS401C – JANUARY 2006 – REVISED FEBRUARY 2013

LM25007 42V, 0.5A Step-Down Switching Regulator

Check for Samples: LM25007

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FEATURES

DESCRIPTION

The LM25007 is a monolithic step-down switching

2

•

Integrated 0.74

Ω N-Channel MOSFET Switch

regulator featuring all of the functions needed to

•

Guaranteed 0.5A Output Current

implement

a

low

cost,

efficient,

power

supply.

•

Ultra-Fast Transient Response

Capable of driving a 0.5A load over a 9V-42V input

voltage range, this device is easy to apply and is

•

Up to 800kHz Operation

provided in the small VSSOP-8 and the thermally

•

No Control Loop Compensation Required

enhanced WSON-8 packages. Ultra-fast transient

•

Vin Feed Forward Provides Constant

response is achieved through the use of a constant

Operating Frequency

on-time architecture with Vin feed forward. This

feature

provides

an

almost

constant

operating

•

2% Accurate 2.5V Feedback from -40°C to

frequency over load and input voltage variations. The

125°C

operating frequency can be adjusted with a single

•

Highly Efficient Operation

resistor. This architecture is easy to use and tolerant

•

Intelligent Current Limit Protection

of component selection. An intelligent current limit is

implemented in the LM25007 with forced off time that

•

External Shutdown Control

is inversely proportional to Vout thus ensuring

•

Thermal Shutdown

recovery from fault conditions. The output voltage

•

VSSOP and Thermally Enhanced WSON

may be set from 2.5V to >30V. To improve efficiency

Packages

in light load applications, the Vcc pin can be

connected to an external voltage source to eliminate

the drop through the internal regulator. Additional

TYPICAL APPLICATIONS

features include: thermal shutdown, Vcc under-

•

12VDC and 24VDC Distributed Rail Systems

voltage lockout, gate drive under-voltage lockout, and

•

24VAC Systems

max duty cycle limiter.

•

Automotive Body Electronics and Telematics

•

Industrial Systems

•

HB-LED Constant Current Source

•

Package:

–

VSSOP-8

–

WSON-8 (4mm x 4mm)

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PRODUCTION DATA information is current as of publication date.

Copyright © 2006–2013, 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.