LM25007MMX Datasheet, PDF (1/19 Pages) Texas Instruments – LM25007 42V, 0.5A Step-Down Switching Regulator

LM25007
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SNVS401C – JANUARY 2006 – REVISED FEBRUARY 2013
LM25007 42V, 0.5A Step-Down Switching Regulator
Check for Samples: LM25007
FEATURES
1
•2 Integrated 0.74Ω N-Channel MOSFET Switch
• Guaranteed 0.5A Output Current
• Ultra-Fast Transient Response
• Up to 800kHz Operation
• No Control Loop Compensation Required
• Vin Feed Forward Provides Constant
Operating Frequency
• 2% Accurate 2.5V Feedback from -40°C to
125°C
• Highly Efficient Operation
• Intelligent Current Limit Protection
• External Shutdown Control
• Thermal Shutdown
• VSSOP and Thermally Enhanced WSON
Packages
TYPICAL APPLICATIONS
• 12VDC and 24VDC Distributed Rail Systems
• 24VAC Systems
• Automotive Body Electronics and Telematics
• Industrial Systems
• HB-LED Constant Current Source
• Package:
– VSSOP-8
– WSON-8 (4mm x 4mm)
DESCRIPTION
The LM25007 is a monolithic step-down switching
regulator featuring all of the functions needed to
implement a low cost, efficient, power supply.
Capable of driving a 0.5A load over a 9V-42V input
voltage range, this device is easy to apply and is
provided in the small VSSOP-8 and the thermally
enhanced WSON-8 packages. Ultra-fast transient
response is achieved through the use of a constant
on-time architecture with Vin feed forward. This
feature provides an almost constant operating
frequency over load and input voltage variations. The
operating frequency can be adjusted with a single
resistor. This architecture is easy to use and tolerant
of component selection. An intelligent current limit is
implemented in the LM25007 with forced off time that
is inversely proportional to Vout thus ensuring
recovery from fault conditions. The output voltage
may be set from 2.5V to >30V. To improve efficiency
in light load applications, the Vcc pin can be
connected to an external voltage source to eliminate
the drop through the internal regulator. Additional
features include: thermal shutdown, Vcc under-
voltage lockout, gate drive under-voltage lockout, and
max duty cycle limiter.
1
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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