LM2587

Product Folder Order Now Technical Documents Tools & Software Support & Community LM2587 SNVS115E – APRIL 2000 – REVISED JUNE 2019 LM2587 4-V To 40-V, 5-A Step-Up Wide VIN Flyback Regulator 1 Features 1 Requires Few External Components Family of Standard Inductors and Transformers NPN Output Switches 5 A, Can Stand Off 65 V Wide Input Voltage Range: 4 V to 40 V Current-mode Operation for Improved Transient Response, Line Regulation, and Current Limit 100-kHz Switching Frequency Internal Soft-Start Function Reduces In-rush Current During Start-up Output Transistor Protected by Current Limit, Undervoltage Lockout, and Thermal Shutdown System Output Voltage Tolerance of ±4% Maximum Over Line and Load Conditions Create a Custom Design Using the LM2587 With the WEBENCH® Power Designer 2 Typical Applications Flyback Regulator Multiple-Output Regulator Simple Boost Regulator Forward Converter 3 Description The LM2587 series of regulators are monolithic integrated circuits specifically designed for flyback, step-up (boost), and forward converter applications. The device is available in 4 different output voltage versions: 3.3 V, 5 V, 12 V, and adjustable. Requiring a minimum number of external components, these regulators are cost effective, and simple to use. Included in the datasheet are typical circuits of boost and flyback regulators. Also listed are selector guides for diodes and capacitors and a family of standard inductors and flyback transfo...