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LM25011AMYX Folha de dados(PDF) 1 Page - Texas Instruments

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Nome de Peças LM25011AMYX
Descrição Electrónicos  42V 2A Constant On-Time Switching Regulator With Adjustable Current Limit
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Fabricante Electrônico  TI [Texas Instruments]
Página de início  http://www.ti.com
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LM25011AMYX Folha de dados(HTML) 1 Page - Texas Instruments

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LM25011, LM25011-Q1
www.ti.com
SNVS617G – APRIL 2009 – REVISED FEBRUARY 2013
LM25011, LM25011Q, LM25011A, LM25011AQ
42V 2A Constant On-Time Switching Regulator With Adjustable Current Limit
Check for Samples: LM25011, LM25011-Q1
1
FEATURES
Thermal Shutdown
Precision 2% Feedback Reference
2
LM25011Q is an Automotive Grade Product
that is AEC-Q100 Grade 1 Qualified (-40°C to
Package: 10-Pin, VSSOP
+125°C Operating Junction Temperature)
DESCRIPTION
LM25011A Allows Low Dropout Operation at
The
LM25011
Constant
On-time
Step-Down
High Switching Frequency
Switching Regulator features all the functions needed
Input Operating Voltage Range: 6V to 42V
to implement a low cost, efficient, buck bias regulator
Absolute Maximum Input Rating: 45V
capable of supplying up to 2A of load current. This
Integrated 2A N-Channel Buck Switch
high voltage regulator contains an N-Channel Buck
switch, a startup regulator, current limit detection, and
Adjustable Current Limit Allows for Smaller
internal
ripple
control.
The
constant
on-time
Inductor
regulation principle requires no loop compensation,
Adjustable Output Voltage from 2.51V
results in fast load transient response, and simplifies
Minimum Ripple Voltage at VOUT
circuit
implementation.
The
operating
frequency
remains constant with line and load. The adjustable
Power Good Output
valley current limit detection results in a smooth
Switching Frequency Adjustable to 2 MHz
transition from constant voltage to constant current
COT Topology Features:
mode when current limit is reached, without the use
of current limit foldback. The PGD output indicates
Switching Frequency Remains Nearly
the output voltage has increased to within 5% of the
Constant with Load Current and Input
expected
regulation
value.
Additional
features
Voltage Variations
include: Low output ripple, VIN under-voltage lock-
Ultra-Fast Transient Response
out, adjustable soft-start timing, thermal shutdown,
gate drive pre-charge, gate drive under-voltage lock-
No Loop Compensation Required
out, and maximum duty cycle limit.
Stable Operation with Ceramic Output
Capacitors
The LM25011A has a shorter minimum off-time than
the LM25011, which allows for higher frequency
Allows for Smaller Output Capacitor and
operation at low input voltages.
Current Sense Resistor
Adjustable Soft-Start Timing
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 © 2009–2013, 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.


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