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LM2576HVT-ADJ 데이터시트(PDF) 1 Page - Texas Instruments

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부품명 LM2576HVT-ADJ
상세설명  SIMPLE SWITCHER짰 3A Step-Down Voltage Regulator
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LM2576, LM2576HV
www.ti.com
SNVS107C – JUNE 1999 – REVISED APRIL 2013
LM2576/LM2576HV Series SIMPLE SWITCHER® 3A Step-Down Voltage Regulator
Check for Samples: LM2576, LM2576HV
1
FEATURES
DESCRIPTION
The LM2576 series of regulators are monolithic
23
3.3V, 5V, 12V, 15V, and Adjustable Output
integrated circuits that provide all the active functions
Versions
for a step-down (buck) switching regulator, capable of
Adjustable Version Output Voltage
driving 3A load with excellent line and load regulation.
Range,1.23V to 37V (57V for HV Version) ±4%
These devices are available in fixed output voltages
Max Over Line and Load Conditions
of 3.3V, 5V, 12V, 15V, and an adjustable output
version.
Specified 3A Output Current
Wide Input Voltage Range, 40V Up to 60V for
Requiring
a
minimum
number
of
external
HV Version
components, these regulators are simple to use and
include internal frequency compensation and a fixed-
Requires Only 4 External Components
frequency oscillator.
52 kHz Fixed Frequency Internal Oscillator
The
LM2576
series
offers
a
high-efficiency
TTL Shutdown Capability, Low Power Standby
replacement
for
popular
three-terminal
linear
Mode
regulators. It substantially reduces the size of the
High Efficiency
heat sink, and in some cases no heat sink is
required.
Uses Readily Available Standard Inductors
Thermal Shutdown and Current Limit
A standard series of inductors optimized for use with
Protection
the LM2576 are available from several different
manufacturers. This feature greatly simplifies the
P+ Product Enhancement Tested
design of switch-mode power supplies.
APPLICATIONS
Other features include a specified ±4% tolerance on
output voltage within specified input voltages and
Simple High-Efficiency Step-Down (Buck)
output load conditions, and ±10% on the oscillator
Regulator
frequency. External shutdown is included, featuring
Efficient Pre-Regulator for Linear Regulators
50
μA (typical) standby current. The output switch
includes cycle-by-cycle current limiting, as well as
On-Card Switching Regulators
thermal shutdown for full protection under fault
Positive to Negative Converter (Buck-Boost)
conditions.
TYPICAL APPLICATION
(Fixed Output Voltage Versions)
Figure 1.
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
SIMPLE SWITCHER is a registered trademark of Texas Instruments.
3
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 1999–2013, 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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