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LM2599S-5.0 Datasheet

  • LM2599S-5.0

  • SIMPLE SWITCHER Power Converter 150 kHz 3A Step-Down Voltage...

  • 31頁

  • NSC

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LM2599 SIMPLE SWITCHER Power Converter 150 kHz 3A Step-Down Voltage Regulator, with
Features
April 1998
LM2599
SIMPLE SWITCHER
廬
Power Converter 150 kHz 3A
Step-Down Voltage Regulator, with Features
General Description
The LM2599 series of regulators are monolithic integrated
circuits that provide all the active functions for a step-down
(buck) switching regulator, capable of driving a 3A load with
excellent line and load regulation. These devices are avail-
able in fixed output voltages of 3.3V, 5V, 12V, and an adjust-
able output version.
This series of switching regulators is similar to the LM2596
series, with additional supervisory and performance features
added.
Requiring a minimum number of external components, these
regulators are simple to use and include internal frequency
compensation
鈥?/div>
, improved line and load specifications,
fixed-frequency oscillator, Shutdown/Soft-start, error flag de-
lay and error flag output.
The LM2599 series 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 7-lead TO-220 package with several
different lead bend options, and a 7-lead TO-263 Surface
mount package.
A standard series of inductors (both through hole and sur-
face mount types) are available from several different manu-
facturers optimized for use with the LM2599 series. This fea-
ture greatly simplifies the design of switch-mode power
supplies.
Other features include a guaranteed
鹵
4% tolerance on out-
put voltage under all conditions of input voltage and output
load conditions, and
鹵
15% on the oscillator frequency. Ex-
ternal shutdown is included, featuring typically 80 碌A(chǔ)
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
3.3V, 5V, 12V, and adjustable output versions
n
Adjustable version output voltage range, 1.2V to 37V
鹵
4% max over line and load conditions
n
Guaranteed 3A output current
n
Available in 7-pin TO-220 and TO-263 (surface mount)
Package
n
Input voltage range up to 40V
n
150 kHz fixed frequency internal oscillator
n
Shutdown/Soft-start
n
Out of regulation error flag
n
Error output delay
n
Low power standby mode, I
Q
typically 80 碌A(chǔ)
n
High Efficiency
n
Uses readily available standard inductors
n
Thermal shutdown and current limit protection
Applications
n
n
n
n
Simple high-efficiency step-down (buck) regulator
Efficient pre-regulator for linear regulators
On-card switching regulators
Positive to Negative converter
Note:
鈥?/div>
Patent Number 5,382,918.
Typical Application
(Fixed Output Voltage Versions)
DS012582-1
SIMPLE SWITCHER
廬
and
Switchers Made Simple
廬
are registered trademarks of National Semiconductor Corporation.
漏 2000 National Semiconductor Corporation
DS012582
www.national.com

LM2599S-5.0 產(chǎn)品屬性

  • National Semiconductor (TI)

  • 5 V

  • 3 A

  • 173 KHz

  • SMD/SMT

  • TO-263

  • Tube

  • 1

  • 45

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