LM2596S-5.0/NOPB

The LM2596 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 3-A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, and an adjustable output version. Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation, and a fixed - frequency oscillator. The LM2596 series operates at a switching frequency of 150 kHz, thus allowing smaller sized filter components than what would be required 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. A standard series of inductors are available from several different manufacturers optimized for use with the LM2596 series. This feature greatly simplifies the design of switch - mode power supplies. Other features include a ±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 overtemperature shutdown for complete protection under fault conditions.

Applications

• Simple High - Efficiency Step - Down (Buck) Regulator
• On - Card Switching Regulators
• Positive to Negative Converter

Key features

• 3.3 - V, 5 - V, 12 - V, and Adjustable Output Versions
• Adjustable Version Output Voltage Range: 1.2 - V to 37 - V ±4% Maximum Over Line and Load Conditions
• Available in TO - 220 and TO - 263 Packages
• 3 - A Output Load Current
• Input Voltage Range Up to 40 V
• Requires Only 4 External Components
• Excellent Line and Load Regulation Specifications
• 150 - kHz Fixed - Frequency Internal Oscillator
• TTL Shutdown Capability
• Low Power Standby Mode, IQ, Typically 80 μA
• High Efficiency
• Uses Readily Available Standard Inductors
• Thermal Shutdown and Current - Limit Protection
• Create a Custom Design Using the LM2596 with the WEBENCH Power Designer