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.
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● Adjustable output voltage range, 1.2V to 37V +/-4% max over line and load
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● Flexible to configure for different output voltages and applications
● Available in TO-220 and D2PAK packages
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● Different mounting options
● Guaranteed 0.5A output load current
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● High power density designs
● Input voltage range up to 40V
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● Can be used with several input voltage supplies (+12V, +24V, +36V)
● Excellent line and load regulation specifications
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● Provides a stable power supply
● 150 kHz fixed frequency internal oscillator
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● No external component required to set frequency
● TTL shutdown capability
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● Easy to implement low power modes
● Low power standby mode, Iq typically 80 µA
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● Power saving mode
● Uses readily available standard inductors
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● Quick and easy implementation
● Thermal shutdown and current limit
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● Additional protection against faults
