LM2594: Buck Regulator, Switching, 0.5 A

Description: The LM2594 series of Buck Switching Regulators are...
  • 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
  • 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
  • Simple high-efficiency step-down (buck) regulator
  • On-card switching regulators
  • Positive to negative converter
  • End Products
  • LCD-TV SMPS
  • Technical Documentation & Design Resources
    Evaluation/Development Tool Information
    Product Change Notification
    Availability and Samples
    LM2594DADJG
  • Status: Last Shipments
  • Compliance: Pb-free Halide free 
  • Description: Buck Regulator, Switching, 0.5 A
  • Package Type: SOIC-8
  • Package Case Outline: 751-07
  • MSL: 1
  • Container Type: TUBE
  • Container Qty: 98
  • LM2594DADJR2G
  • Status: Active
  • Compliance: Pb-free Halide free 
  • Description: Buck Regulator, Switching, 0.5 A
  • Package Type: SOIC-8
  • Package Case Outline: 751-07
  • MSL: 1
  • Container Type: REEL
  • Container Qty: 2500
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  • LM2594PADJG
  • Status: Last Shipments
  • Compliance: Pb-free Halide free 
  • Description: Buck Regulator, Switching, 0.5 A
  • Package Type: PDIP-8
  • Package Case Outline: 626-05
  • MSL: NA
  • Container Type: TUBE
  • Container Qty: 50
  • Applications
    Specifications
  • Topology: Step-Down 
  • Control Mode: Voltage Mode 
  • VCC Min (V): 4.5 
  • VCC Max (V): 40 
  • VO Typ (V): 1.23 to 37 
  • IO Typ (A): 0.5 
  • Efficiency (%): 85 
  • fSW Typ (kHz): 150 
  • Package Type: SOIC-8 
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