LM2596 SIMPLE SWITCHER® 4.5V to 40V, 3A Low Component Count Step-Down Regulator | TI.com

LM2596 (ACTIVE)

SIMPLE SWITCHER® 4.5V to 40V, 3A Low Component Count Step-Down Regulator

SIMPLE SWITCHER® 4.5V to 40V, 3A Low Component Count Step-Down Regulator - LM2596
 

Recommended alternative parts

  • LM43603  -  3.5 to 36V, 3A Synchronous Step-Down Voltage Regulator - Higher efficiency, Low Quiescent Current, Smaller Solution Size
  • LMR14030  -  4 to 40V, 3.5A 2.2MHz Step-Down Voltage Regulator - Low Quiescent Current, Smaller Solution Size
  • LMR23630  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. 

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 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 required with lower frequency switching regulators. Available in a standard 7-pin TO-220 package with several different lead bend options, and a 7-pin 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 ±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 overtemperature shutdown for complete protection under fault conditions.

Features

  • 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 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

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Parametrics Compare all products in Buck Converter (Integrated Switch)

 
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Regulated Outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
LM2596 LM43603 LMR14030 LMR23630
4.5     3.5     4     4.5    
40     36     40     36    
3.3     1     1     1    
37     28     36     30    
3     3     3.5     3    
1     1     1     1    
110     200     200     200    
173     2200     2500     2200    
5     0.027     0.04     0.075    
Enable     Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification
Tracking    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Tracking
UVLO Adjustable    
Enable
Frequency Synchronization
Light Load Efficiency
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
Voltage Mode     Current Mode     Current Mode     Current Mode    
100     99     98     97    
-40 to 125     -40 to 125     -40 to 125     -40 to 125    
Catalog     Catalog     Catalog     Catalog    
DDPAK/TO-263
TO-220    
HTSSOP
SON    
SO PowerPAD     SO PowerPAD
SON    
New! Interactive Design
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WEBENCH® Designer LM2596

  Min   Max Range
Vin  V 4.5 to 40.0V
Vout  V 1.23 to 40V
Iout  A ≤ 3A
Ambient Temp  °C -40 to 125°C


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