LM2591HVT-3.3 National Semiconductor, LM2591HVT-3.3 Datasheet
![Voltage Regulator IC](/photos/18/98/189891/4243351_sml.jpg)
LM2591HVT-3.3
Manufacturer Part Number
LM2591HVT-3.3
Description
Voltage Regulator IC
Manufacturer
National Semiconductor
Specifications of LM2591HVT-3.3
Output Voltage
3.3VDC
Output Current
1A
No. Of Pins
5
Termination Type
Through Hole
Mounting Type
Through Hole
Peak Reflow Compatible (260 C)
No
Supply Voltage Max
60V
Leaded Process Compatible
No
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
© 2003 National Semiconductor Corporation
LM2591HV
SIMPLE SWITCHER
Step-Down Voltage Regulator
General Description
The LM2591HV series of regulators are monolithic inte-
grated circuits that provide all the active functions for a
step-down (buck) switching regulator, capable of driving a
1A load with excellent line and load regulation. These de-
vices are available in fixed output voltages of 3.3V, 5V, and
an adjustable output version.
This series of switching regulators is similar to the
LM2590HV, but without some of the supervisory and perfor-
mance features of the latter.
Requiring a minimum number of external components, these
regulators are simple to use and include internal frequency
compensation
fixed-frequency oscillator.
The LM2591HV operates at a switching frequency of 150
kHz thus allowing smaller sized filter components 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-lead TO-263 Surface
mount package.
Other features include a guaranteed
put voltage under all conditions of input voltage and output
load conditions, and
ternal shutdown is included, featuring typically 90 µA
standby current. Self protection features include a two stage
Typical Application
SIMPLE SWITCHER
†
®
, improved line and load specifications and a
and Switchers Made Simple
±
15% on the oscillator frequency. Ex-
®
(Fixed Output Voltage Versions)
are registered trademarks of National Semiconductor Corporation.
±
4% tolerance on out-
DS101293
®
Power Converter 150 kHz 1A
current limit for the output switch and an over temperature
shutdown for complete protection under fault conditions.
Features
n 3.3V, 5V, and adjustable output versions
n Adjustable version output voltage range, 1.2V to 57V
n Guaranteed 1A output load current
n Available in 5-pin TO-220 and TO-263 (surface mount)
n Input voltage range up to 60V
n 150 kHz fixed frequency internal oscillator
n On/Off control
n Low power standby mode, I
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
Package
±
Note:
4% max over line and load conditions
†
Patent Number 5,382,918.
Q
typically 90 µA
10129301
www.national.com
July 2003