LM1575, LM2575-N, LM2575HV
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SNVS106E –MAY 1999–REVISED APRIL 2013
LM1575/LM2575/LM2575HV SIMPLE SWITCHER
®
1A Step-Down Voltage Regulator
Check for Samples: LM1575, LM2575-N, LM2575HV
1
FEATURES
DESCRIPTION
The LM2575 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 Range,
driving a 1A load with excellent line and load
– 1.23V to 37V (57V for HV Version) ±4%
regulation. These devices are available in fixed output
voltages of 3.3V, 5V, 12V, 15V, and an adjustable
Max Over
output version.
– Line and Load Conditions
Requiring a minimum number of external
• Specified 1A Output Current
components, these regulators are simple to use and
• Wide Input Voltage Range, 40V up to 60V for
include internal frequency compensation and a fixed-
HV Version
frequency oscillator.
• Requires Only 4 External Components
The LM2575 series offers a high-efficiency
• 52 kHz Fixed Frequency Internal Oscillator
replacement for popular three-terminal linear
• TTL Shutdown Capability, Low Power Standby
regulators. It substantially reduces the size of the
Mode heat sink, and in many cases no heat sink is
required.
• High Efficiency
A standard series of inductors optimized for use with
• Uses Readily Available Standard Inductors
the LM2575 are available from several different
• Thermal Shutdown and Current Limit
manufacturers. This feature greatly simplifies the
Protection
design of switch-mode power supplies.
• P
+
Product Enhancement Tested
Other features include a specified ±4% tolerance on
output voltage within specified input voltages and
APPLICATIONS
output load conditions, and ±10% on the oscillator
• Simple High-Efficiency Step-Down (Buck)
frequency. External shutdown is included, featuring
Regulator
50 μA (typical) standby current. The output switch
includes cycle-by-cycle current limiting, as well as
• Efficient Pre-Regulator for Linear Regulators
thermal shutdown for full protection under fault
• On-Card Switching Regulators
conditions.
• Positive to Negative Converter (Buck-Boost)
Typical Application
(Fixed Output Voltage Versions)
Pin numbers are for the TO-220 package.
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.
2SIMPLE SWITCHER is a registered trademark of Texas Instruments.
3All 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.
