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LM2596E-12

Description
Switching Regulator/Controller
CategoryPower/power management    The power supply circuit   
File Size1MB,14 Pages
ManufacturerFCI / Amphenol
Download Datasheet Parametric View All

LM2596E-12 Overview

Switching Regulator/Controller

LM2596E-12 Parametric

Parameter NameAttribute value
Objectid110094045
package instruction,
Reach Compliance Codeunknown
ECCN codeEAR99
LM2596
Simple switcher Power Converter 150kHz
3A Step-Down Voltage Regulator
GENERAL DESCRIPTION
The LM2596 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 available in fixed output voltages of 3.3V, 5V,
12V, and an adjustable output version.
Requiring a minimum number of external
components, these regulators are simple to use
and include internal frequency compensation, and a
fixed-frequency oscillator.
The LM2596 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 5-lead TO-220 package with several
different lead bend options, and a 5-lead TO-263
surface mount package.
A standard series of inductors are available from
several different manufacturers optimized for use
with the LM2596 series. This feature greatly
simplifies the design of switch-mode power
supplies.
Other features include a guaranteed
±4%
tolerance
on output voltage under specified input voltage and
output load conditions, and
±15%
on the oscillator
frequency. External shutdown is included, featuring
typically 80 UA standby current. 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.
FEATURES
3.3V, 5V, 12V, and adjustable output versions
Adjustable version output voltage range, 1.2V to 37V
±4%
max over line and load conditions
Available in TO-220 and TO-263 packages
Guaranteed 3A output load current
Input voltage range up to 40V
Requires only 4 external components
Excellent line and load regulation specifications
150 kHz fixed frequency internal oscillator
TTL shutdown capability
Low power standby mode, I
Q
typically 80 UA
High efficiency
Uses
readily available standard inductors
Thermal shutdown and current limit protection
APPLICATIONS
Simple high-efficiency step-down (buck) regulator
On-card switching regulators
Positive to negative converter
TYPICAL APPLICATION
(Fixed Output Voltage Versions)
12V
LM2596
5.0
+ 1
2
C
IN
5
3
680
µ
F
+V
IN
4
L1
+C
220
µ
F
OUT
5.0V
BLOCK DIAGRAM
ON/OFF
V
IN
START
UP
2.5V
+
+
COM
-
-
COM
+
R2
GM
+
AMP
-
Active
capacitor
+
-
150kHz
OSC
OUTPUT
GND
-
+
LATCH
DRIVER
+
FEEDBACK
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