Texas Instruments SIMPLE SWITCHER LM2596 Manual

LM2596 SIMPLE SWITCHER

1 Features

• New product available:
– LMR51430 4.5 to 36-V, 3-A, 500-kHz and 1.1-
MHz synchronous converter
• For faster time to market:
– TLVM13630 3 to 36-V, 3-A, 200-kHz to 2.2-MHz
power module
• 3.3-V, 5-V, 12-V, and adjustable output versions
• Adjustable version output voltage range: 1.2-V to
37-V ±4% maximum over line and load conditions
• Available in TO-220 and TO-263 packages
• 3-A output load current
• Input voltage range up to 40 V
• Requires only four external components
• Excellent line and load regulation specifications
• 150-kHz fixed-frequency internal oscillator
• TTL shutdown capability
• Low power standby mode, I
• High efficiency
• Uses readily available standard inductors
• Thermal shutdown and current-limit protection
• Create a custom design using the LM2596 with the
WEBENCH ® Power Designer

2 Applications

• Appliances
• Grid infrastructure
• EPOS
• Home theater
(Fixed Output Voltage Versions)
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
3-A Step-Down Voltage Regulator
, typically 80 μA
Q
Typical Application
SNVS124G – NOVEMBER 1999 – REVISED MARCH 2023
®
Power Converter 150-kHz

3 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 3-A load with excellent line and load
regulation. These devices are available in fixed output
voltages of 3.3 V, 5 V, 12 V, and an adjustable output
version.
Requiring a minimum
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
lower frequency switching regulators. Available in a
standard 5-pin TO-220 package with several different
lead bend options, and a 5-pin TO-263 surface mount
package.
Package Information
PART NUMBER PACKAGE
NDH (TO-220, 5) 14.986 mm × 10.16 mm
LM2596
KTT (TO-263, 5) 10.10 mm × 8.89 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
LM2596
number of external
can be required with
(1)
BODY SIZE (NOM)