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LM2596 датащи(PDF) 1 Page - First Components International |
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LM2596 датащи(HTML) 1 Page - First Components International |
1 / 14 page 1 GENERAL DESCRIPTION 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 3A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, 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 needed with lower frequency switching regulators. Available in a standard 5-lead TO-220 package with several different lead bend options, and a 5-lead 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 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 UA 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. FEATURES • 3.3V, 5V, 12V, and adjustable output versions • Adjustable version output voltage range, 1.2V to 37V • ±4% max over line and load conditions • Available in TO-220 and TO-263 packages • Guaranteed 3A output load current • Input voltage range up to 40V • 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 UA • High efficiency • Uses readily available standard inductors • Thermal shutdown and current limit protection APPLICATIONS • Simple high-efficiency step-down (buck) regulator • On-card switching regulators • Positive to negative converter TYPICAL APPLICATION (Fixed Output Voltage Versions) BLOCK DIAGRAM +VIN LM2596 5.0 + CIN 680 F µ L1 220 F µ COUT + 12V 1 2 3 4 5 5.0V + - + - 150kHz OSC Active capacitor AMP + - LATCH DRIVER COM COM - + - + START UP + + GM R2 2.5V FEEDBACK ON/OFF V IN OUTPUT GND LM2596 Simple switcher Power Converter 150kHz 3A Step-Down Voltage Regulator |
Аналогичный номер детали - LM2596 |
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Аналогичное описание - LM2596 |
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