LM2594: Buck Regulator, Switching, 0.5 A

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
  • Available in TO-220 and D2PAK packages
  • Guaranteed 0.5A output load current
  • Input voltage range up to 40V
  • Excellent line and load regulation specifications
  • 150 kHz fixed frequency internal oscillator
  • TTL shutdown capability
  • Low power standby mode, Iq typically 80 µA
  • Uses readily available standard inductors
  • Thermal shutdown and current limit
Benefits
  • Flexible to configure for different output voltages and applications
  • Different mounting options
  • High power density designs
  • Can be used with several input voltage supplies (+12V, +24V, +36V)
  • Provides a stable power supply
  • No external component required to set frequency
  • Easy to implement low power modes
  • Power saving mode
  • Quick and easy implementation
  • 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
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
150 KHz 0.5A Step-Down Switching RegulatorLM2594/D (555.0kB)0
Evaluation Board Documents (8)
Document TitleDocument ID/SizeRevisionRevision Date
LM2594APDBCKGEVB Bill of Materials ROHS CompliantLM2594APDBCKGEVB_BOM_ROHS.PDF (31.0kB)0
LM2594APDBCKGEVB Gerber Layout Files (Zip Format)LM2594APDBCKGEVB_GERBER.ZIP (19.0kB)1
LM2594APDBCKGEVB SchematicLM2594APDBCKGEVB_SCHEMATIC.PDF (10.0kB)1
LM2594APDBCKGEVB Test ProcedureLM2594APDBCKGEVB_TEST_PROCEDURE.PDF (165.0kB)1
LM2594ASCBCKGEVB Bill of Materials ROHS CompliantLM2594ASCBCKGEVB_BOM_ROHS.PDF (32.0kB)1
LM2594ASCBCKGEVB Gerber Layout Files (Zip Format)LM2594ASCBCKGEVB_GERBER.ZIP (16.0kB)1
LM2594ASCBCKGEVB SchematicLM2594ASCBCKGEVB_SCHEMATIC.PDF (10.0kB)1
LM2594ASCBCKGEVB Test ProcedureLM2594ASCBCKGEVB_TEST_PROCEDURE.PDF (95.0kB)1
Package Drawings (2)
Document TitleDocument ID/SizeRevision
8 LEAD PDIP626-05 (35.0kB)P
SOIC-8 Narrow Body751-07 (62.6kB)AK
Evaluation/Development Tool Information
ProductStatusComplianceShort Description
LM2594APDBCKGEVBActivePb-freeStep-Down Switching Regulator Evaluation Board
LM2594ASCBCKGEVBActivePb-freeStep-Down Switching Regulator Evaluation Board
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
LM2594DADJGLast ShipmentsPb-free Halide freeSOIC-8751-071Tube98
LM2594DADJR2GActivePb-free Halide freeSOIC-8751-071Tape and Reel2500$1.2
LM2594PADJGLast ShipmentsPb-free Halide freePDIP-8626-05NATube50
Specifications
ProductTopologyControl ModeVCC Min (V)VCC Max (V)VO Typ (V)IO Typ (A)Efficiency (%)fSW Typ (kHz)
LM2594DADJR2GStep-DownVoltage Mode4.5401.23 to 370.585150
150 KHz 0.5A Step-Down Switching Regulator (555.0kB) LM2594
LM2594APDBCKGEVB BOM ROHS LM2594APDBCKGEVB
LM2594APDBCKGEVB GERBER LM2594APDBCKGEVB
LM2594APDBCKGEVB SCHEMATIC LM2594APDBCKGEVB
LM2594APDBCKGEVB TEST PROCEDURE LM2594APDBCKGEVB
LM2594ASCBCKGEVB BOM ROHS LM2594ASCBCKGEVB
LM2594ASCBCKGEVB GERBER LM2594ASCBCKGEVB
LM2594ASCBCKGEVB SCHEMATIC LM2594ASCBCKGEVB
LM2594ASCBCKGEVB TEST PROCEDURE LM2594ASCBCKGEVB
SOIC-8 Narrow Body CM1216
8 LEAD PDIP NE592
LM2594