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LM2590HV-AQ Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LM2590HV-AQ
Description  SIMPLE SWITCHER짰Power Converter 150 kHz 1A Step-Down Voltage Regulator, with Features
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2590HV-AQ Datasheet(HTML) 1 Page - National Semiconductor (TI)

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LM2590HV-AQ
SIMPLE SWITCHER®Power Converter 150 kHz 1A
Step-Down Voltage Regulator, with Features
General Description
The LM2590HV-AQ regulator is a monolithic integrated cir-
cuit which provides all the active functions for a step-down
(buck) switching regulator, and is capable of driving a 1 Amp
load
with
excellent
line
and
load
regulation.
The
LM2590HV-AQ is available in fixed output voltages of 3.3V,
5.0V, as well as an adjustable output version.
The LM2590HV-AQ switching regulator is similar to the
LM2591HV with additional supervisory and performance fea-
tures.
Requiring a minimum number of external components, these
regulators are simple to use and include internal frequency
compensation, improved line and load specifications, fixed-
frequency oscillator, Shutdown/Soft-start, output error flag
and flag delay.
The LM2590HV-AQ operates at a switching frequency of
150 kHz thus allowing smaller sized filter components than
what would be needed with lower frequency switching regu-
lators. Available in a standard 7-lead TO-220 package with
several different lead bend options, and a 7-lead TO-263
Surface mount package.
Other features include a guaranteed ±4% tolerance on out-
put voltage under all conditions of input voltage and output
load conditions, and ±15% on the oscillator frequency. Ex-
ternal shutdown is included, featuring typically 90 µA
standby current. Self protection features include a two stage
current limit for the output switch and an over temperature
shutdown for complete protection under fault conditions.
Features
n
Reliability Qualification for Automotive
n
3.3V, 5V, and adjustable output versions
n
Adjustable version output voltage range, 1.2V to 57V
±4% max over line and load conditions
n
Guaranteed 1A output load current
n
Available in 7-pin TO-220 and TO-263 (surface mount)
Package
n
Input voltage range up to 60V
n
150 kHz fixed frequency internal oscillator
n
Shutdown/Soft-start
n
Out of regulation error flag
n
Error flag delay
n
Low power standby mode, I
Q typically 90 µA
n
High Efficiency
n
Thermal shutdown and current limit protection
Applications
n
Simple high-efficiency step-down (buck) regulator
n
Efficient pre-regulator for linear regulators
n
On-card switching regulators
n
Positive to Negative converter
Note: † Patent Number 5,382,918.
Typical Application (Fixed Output Voltage Versions)
20097101
SIMPLE SWITCHER® and Switchers Made Simple® are registered trademarks of National Semiconductor Corporation.
May 2004
© 2004 National Semiconductor Corporation
DS200971
www.national.com


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