IC Integrated Circuit of Simple Switcher Power Converter Voltage Regulator Lm2596s

Product Description

SIMPLE SWITCHER Power Converter 150 kHz 3A Step-Down Voltage Regulator
 
MANUFACTURER
Texas Instruments
 
PRODUCT CATEGORY
DC to DC Converter and Switching Regulator Chip
 
DESCRIPTION
Conv DC-DC 4.5V to 40V Inv/Step Down Single-Out 5V 3A 6-Pin(5+Tab) TO-263 Tube
 
Specifications
Type Inverting|Step Down
Number of Outputs 1
Output Type Fixed
Output Voltage (V) 5
Maximum Output Current (A) 3
Minimum Input Voltage (V) 4.5
Maximum Input Voltage (V) 40
Switching Regulator Yes
Efficiency (%) 80(Typ)
Minimum Operating Temperature (°C) -40
Maximum Operating Temperature (°C) 125
Packaging Tube
Mounting Surface Mount
Package Height (mm) 4.83(Max)
Package Length (mm) 10.67(Max)
Package Width (mm) 9.65(Max)
PCB changed 5
Tab Tab
Standard Package Name TO-263
Supplier Package TO-263
Pin Count 6
Lead Shape Gull-wing
 
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 µA 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, IQ typically 80 µA
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