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UMW
UMW LM2592HV
2A Step-Down Voltage Regulator
General Description
Features
The LM2592HV series of regulators are monolithic
integrated circuits that provide all the active functions for a
step-down (buck) switching regulator, capable of driving a 2A
load with excellent line and load regulation. These devices
are available in fixed output voltages of 3.3V, 5V, 12V, and an
adjustable output version.
n 3.3V, 5V, 12V, and adjustable output versions
n Adjustable version output voltage range, 1.2V to 57V
±
4% max over line and load conditions
n Available in TO-220 and TO-263 packages
n Guaranteed 2A output load current
n Input voltage range up to 60V
n Requires only 4 external components
n Excellent line and load regulation specifications
n 150 kHz fixed frequency internal oscillator
n TTL shutdown capability
n Low power standby mode, IQ typically 80 µA
n High efficiency
n Uses readily available standard inductors
n Thermal shutdown and current limit protection
Requiring a minimum number of external components, these
regulators are simple to use and include internal frequency
†
compensation , and a fixed-frequency oscillator.
The LM2592HV series operates at a switching frequency
of150 kHz thus allowing smaller sized filter com-pontents
than what would be needed with lower frequency switching
regulators. Available in a standard 5-lead TO-220 package
with several different lead bend options, and a 5-lesd
TO-263 surface mount package.
A standard series of inductors are available from several
different manufacturers optimized for use with the LM2592
series. This feature greatly simplifies the design of
switch-mode power supplies.
Applications
n Simple high-efficiency step-down (buck) regulator
n On-card switching regulators
n Positive to negative converter
±
Other features include a guaranteed 4% tolerance on out-
put voltage under specified input voltage and output load
±
conditions, and 15% on the oscillator frequency. External
shutdown is included, featuring typically 80 µA standby cur-
rent. Self protection features include a two stage frequency
reducing current limit for the output switch and an over
temperature shutdown for complete protection under fault
conditions.
Typical Application (Fixed Output Voltage
Versions)
LM2592HV
5.0
Package Types
TO263-5L
TO220-5L
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