LM2593HVSX-ADJ/NOPB

The LM2593HV series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 2-A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3-V, 5-V, and an adjustable output version. This series of switching regulators is similar to the LM2592HV with additional supervisory and performance features. Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation, improved line and load specifications, fixed-frequency oscillator, Shutdown/Soft-start, output error flag, and flag delay. The LM2593HV 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 7-pin TO-220 package with several different lead bend options, and a 7-pin TO-263 surface-mount package. Other features include a specified ±4% tolerance on output voltage under all conditions of input voltage and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring typically 90-μA standby current. Selfprotection features include a two stage current limit for the output switch and an overtemperature shutdown for complete protection under fault conditions.

Applications

• Simple High-Efficiency Step-Down (Buck) Regulators
• Efficient Preregulator for Linear Regulators
• On-Card Switching Regulators
• Positive-to-Negative Converters

Key features

• 3.3-V, 5-V, and Adjustable Output Versions
• Adjustable Version Output Voltage Range: 1.2 V to 57 V ±4% Maximum Over Line and Load Conditions
• Ensured 2-A Output Load Current
• Available in 7-Pin TO-220 and TO-263 (SurfaceMount) Package
• Input Voltage Range up to 60 V
• 150-kHz Fixed Frequency Internal Oscillator
• Shutdown and Soft-Start
• Out-of-Regulation Error Flag
• Error Flag Delay
• Low Power Standby Mode: IQ, Typically 90 μA
• High Efficiency
• Thermal Shutdown and Current-Limit Protection