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LM2596: Buck Regulator, Switching, 3.0 A

Datasheet: 3.0 A, Step-Down Switching Regulator
Rev. 0 (449.0kB)
Product Overview
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The LM2596 series of Buck Switching 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.

Requiring a minimum number of external components, these Buck Switching 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 D2PAK 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. See LM2595 for 1.0A and LM2594 for 0.5A.
Features   Benefits
     
  • Adjustable output voltage range, 1.2V to 37V +/-4% max over line and load conditions
 
  • Flexible to configure for different output voltages and applications
  • Available in TO-220 and D2PAK packages
 
  • Different mounting options
  • Guaranteed 3A output load current
 
  • High power designs
  • Input voltage range up to 40V
 
  • Can be used with several input voltage supplies (+12V, +24V, +36V)
  • Excellent line and load regulation specifications
 
  • Provides a stable power supply
  • 150 kHz fixed frequency internal oscillator
 
  • No external component required to set frequency
  • TTL shutdown capability
 
  • Easy to implement low power modes
  • Low power standby mode, Iq typically 80 µA
 
  • Power saving mode
  • Uses readily available standard inductors
 
  • Quick and easy implementation
  • Thermal shutdown and current limit
 
  • Additional protection against faults
Applications   End Products
  • Simple high-efficiency step-down (buck) regulator
  • On-card switching regulators
  • Positive to negative converter
 
  • LCD-TV SMPS
Evaluation/Development Tool Information
Product Status Compliance Short Description Action
LM2596ADPBCKGEVB Active
Pb-free
Step-Down Switching Regulator Evaluation Board
LM2596ATPBCKGEVB Active
Pb-free
Step-Down Switching Regulator Evaluation Board
Availability & Samples
Specifications
Application Diagram
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
LM2596DSADJG Active
Pb-free
Halide free
LM2596 D2PAK-5 936A-02 1 260 Tube 50 $0.988
LM2596DSADJR4G Active
Pb-free
Halide free
LM2596 D2PAK-5 936A-02 1 260 Tape and Reel 800 $1.0281
LM2596TADJG Obsolete 
Pb-free
Halide free
LM2596 TO-220-5 314D-04 NA Tube 50  
LM2596TVADJG Active
Pb-free
Halide free
LM2596 TO-220-5 314B-05 NA Tube 50 $1.0197
Market Leadtime (weeks) : 13 to 16
Avnet   (2020-08-19 00:00) : >1K
FutureElectronics   (2020-08-19 00:00) : <1K
Market Leadtime (weeks) : 13 to 16
FutureElectronics   (2020-08-19 00:00) : >10K
Market Leadtime (weeks) : Contact Factory
PandS   (2020-09-14 00:00) : <100
Market Leadtime (weeks) : 17 to 20

Product
Description
Pricing ($/Unit)
Compliance
Status
Topology
Control Mode
VCC Min (V)
VCC Max (V)
VO Typ (V)
IO Typ (A)
Efficiency (%)
fSW Typ (kHz)
Package Type
LM2596DSADJG  
 $0.988 
Pb
H
 Active   
Step-Down
Voltage Mode
4.5
40
1.25 to 37
3
85
150
D2PAK-5
LM2596DSADJR4G  
 $1.0281 
Pb
H
 Active   
Step-Down
Voltage Mode
4.5
40
1.25 to 37
3
85
150
D2PAK-5
LM2596TVADJG  
 $1.0197 
Pb
H
 Active   
Step-Down
Voltage Mode
4.5
40
1.25 to 37
3
85
150
TO-220-5
Case Outlines
314D-04    314B-05    936A-02   
LM2596: Buck Regulator, Switching, 3.0 A
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Featured Video
Step-Down Switching Regulator Evaluation Board - LM2596ADPBCKGEVB
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