Bay Linear Inspire the Linear Power LM2576 3.0A Step Down Switching voltage Regulator Adjustable & Fix Output Description Features The Bay Linear LM2576 contains fixed and adjustable switching voltage regulators that require a minimum of external components. All circuitry necessary to build a buck-switching regulator is included. The LM2576 is available in 3.3V; 5V, 12V & 15V fixed voltages, or an adjustable version with an output voltage range from 1.23V to 37V. The guaranteed accuracy for specified input and load conditions is 4%. The LM2576 can supply 3A with an excellent load and line regulation. Protection such as cycle-by-cycle current limiting or thermal shutdown has been designed. In standby mode, the current consumption has been minimized (200A). For 1A step-down switching regulators refer to B2575 data sheets Pin Connection * * * * * * * * * * * Guaranteed 3A Output Current High Efficiency Wide Input Voltage, up to 40V 3.3V, 5V, 12V, 15V and Adjustable Output Versions Thermal Shutdown and Current Limit Protection Requires only 4 External Components Low Power Standby Mode < 200A Typical Shutdown Capability (Standby Mode) 52kHz Fixed Frequency Internal Oscillator Uses Standard Inductors Pin-to-Pin Compatible with LM2576 Applications * * * * * Efficient Pre-Regulator for Linear Regulators On-card Switching Regulators Positive to Negative Converter (Buck-Boost) Simple High-efficiency Step-down (Buck) Portable Instruments Ordering Information PIN CONNECTIONS Devices LM2576T-X LM2576S-X LM2576J-X Package Temp. TO-220 TO-263 LPDD -40 C to 125 C -40C to 125 C -40C to 125 C X= Output Voltage (X=3.3V, 5.0V, 12V, 15V or Blank for Adjustable) Consult factory for other fixed voltages. TO-263-5 Package TO-220-5 Package BAY B2576 1 2 3 4 5 BAY B2576 1) VIN 2) VOUT 3) GND 4) FB 1 2 3 4 5 3) GND 4) FB 5) ON/OFF 5) ON/OFF Top View Bay Linear, Inc 1) VIN 2) VOUT Top View 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com LM2576 Absolute Maximum Rating Parameter Maximum Input Voltage Power Dissipation Off Pin Input Voltage Output Voltage Supply Voltage Operating Junction Temperature Range Control Section Power Transistor Storage Temperature Range Lead Temperature (Soldering 10 Sec.) Symbol Value Unit VIN PO 45 Internally Limited -0.3V