LM2596 DC/DC Converter Datasheet

LM2596 Datasheet, PDF, Equivalent


Part Number

LM2596

Description

3A PWM Buck DC/DC Converter

Manufacture

CYStech

Total Page 12 Pages
Datasheet
Download LM2596 Datasheet


LM2596
Spec. No. : C548F5
CYStech Electronics Corp. Issued Date : 2007.12.11
Revised Date :
Page No. : 1/12
150kHz, 3A PWM Buck DC/DC Converter
LM2596-XXE5/F5
Description
The LM2596-XXE5/F5 series of regulators are monolithic ICs that provide all active functions for a step-down
(buck) switching regulator, capable of driving 3A load with excellent line and load regulation. These devices are
available in fixed output voltage 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-XXE5/F5 series operates at a switching frequency of 150kHz, thus allowing smaller sized filter
components than what would be needed with lower frequency switching regulators. Available in standard 5-lead
TO-220 and TO-263 packages with several different lead bend options. A standard series of inductors are available
from several different manufacturers optimized for use with the LM2596-XXE5/F5 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 80μA 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, 1.3V to 37V±4% max over line and load conditions
150kHz±15% fixed switching frequency
TTL shutdown capability
Operating voltage can be up to 40V
Output load current:3A
TO220-5L and TO263-5L packages
Low power standby mode.
Thermal shutdown and current limit protection.
High efficiency
Built-in switching transistor on chip
Requires only 4 external components
Use readily available standard inductors
Applications
Simple high-efficiency step-down (buck) regulator.
Positive to negative converter (Buck-Boost).
On-card switching regulators.
LM2596-XXE5/F5
CYStek Product Specification

LM2596
Pin Assignment
Spec. No. : C548F5
CYStech Electronics Corp. Issued Date : 2007.12.11
Revised Date :
Page No. : 2/12
Block Diagram
Ordering Information
LM2596-XXE5/F5
CYStek Product Specification


Features Spec. No. : C548F5 CYStech Electronics C orp. Issued Date : 2007.12.11 Revised D ate : Page No. : 1/12 150kHz, 3A PWM Bu ck DC/DC Converter LM2596-XXE5/F5 Desc ription The LM2596-XXE5/F5 series of re gulators are monolithic ICs that provid e all active functions for a step-down (buck) switching regulator, capable of driving 3A load with excellent line and load regulation. These devices are ava ilable in fixed output voltage of 3.3V, 5V, 12V and an adjustable output versi on. Requiring a minimum number of exter nal components, these regulators are si mple to use and include internal freque ncy compensation and a fixedfrequency o scillator. The LM2596-XXE5/F5 series op erates at a switching frequency of 150k Hz, thus allowing smaller sized filter components than what would be needed wi th lower frequency switching regulators . Available in standard 5-lead TO-220 a nd TO-263 packages with several differe nt lead bend options. A standard series of inductors are available from several different manufacturer.
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