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LM2594: Buck Regulator, Switching, 0.5 A

Datasheet: 0.5 A, Step-Down Switching Regulator
Rev. 0 (555.0kB)
Product Overview
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The LM2594 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 1A 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 LM2594 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 8-lead PDIP package and 8-lead SOIC surface mount package.

A standard series of inductors are available from several different manufacturers optimized for use with the LM2594 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 LM2596 for 3.0A and LM2595 for 1.0A.
Features   Benefits
     
  • Adjustable output voltage range, 1.2V to 37V +/-4% max over line and load
 
  • Flexible to configure for different output voltages and applications
  • Available in TO-220 and D2PAK packages
 
  • Different mounting options
  • Guaranteed 0.5A output load current
 
  • High power density 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
LM2594APDBCKGEVB Active
Pb-free
Step-Down Switching Regulator Evaluation Board
LM2594ASCBCKGEVB 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.
LM2594DADJG Obsolete 
Pb-free
Halide free
LM2594 SOIC-8 751-07 1 260 Tube 98  
LM2594DADJR2G Active
Pb-free
Halide free
LM2594 SOIC-8 751-07 1 260 Tape and Reel 2500 $0.791
LM2594PADJG Obsolete 
Pb-free
Halide free
LM2594 PDIP-8 626-05 NA Tube 50  
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : 13 to 16
PandS   (2020-09-14 00:00) : >1K
Market Leadtime (weeks) : Contact Factory

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
LM2594DADJR2G  
 $0.791 
Pb
H
 Active   
Step-Down
Voltage Mode
4.5
40
1.23 to 37
0.5
85
150
SOIC-8
Case Outlines
751-07    626-05   
LM2594: Buck Regulator, Switching, 0.5 A
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Featured Video
Step-Down Switching Regulator Evaluation Board - LM2594ADPBCKEVB
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