LM5022 Datasheet | National Semiconductor

Description The LM5022 is a high voltage low-side N-channel MOSFET controller ideal for use in boost and SEPIC regulators. It contains all of the features needed to implement single ended primary topologies. Output voltage regulation is based on current-mode control, which eases the design of loop pensation while providing inherent input voltage feed-forward. The LM5022 includes a start-up regulator that operates over a wide input range of 6V to 60V. The PWM controller is designed for high speed capability including an oscillator frequency range up to 2 MHz and total propagation delays less than 100 ns. Additional features include an error amplifier, precision reference, line under-voltage lockout, cycle-by-cycle current limit, slope pensation, soft-start, external synchronization capability and thermal shutdown. The LM5022 is available in the MSOP-10 package. Features - - - - - - - - - - - Internal 60V Startup Regulator 1A Peak MOSFET Gate Driver VIN Range 6V to 60V Duty Cycle Limit of 90% Programmable UVLO with Hysteresis Cycle-by-Cycle Current Limit External Synchronizable (AC-coupled) Single Resistor Oscillator Frequency Set Slope pensation Adjustable Soft-start MSOP-10 Package Applications - Boost Converter - SEPIC Converter Typical Application © 2007 National Semiconductor Corporation .national. Connection Diagram 10-Lead MSOP NS Package Number MUB10A Ordering Information Part Number LM5022MM LM5022MMX NS Package Drawing MUB10A MUB10A Supplied As 1000 Units on Tape and Reel 3500 Units on Tape and Reel Pin Descriptions Pin(s) 1 2 Name VIN FB Description Source input voltage Feedback pin Error amplifier output and PWM parator input Application Information Input to the start-up regulator. Operates from 6V to 60V. Inverting input to the internal voltage error amplifier. The noninverting input of the error amplifier connects to a 1.25V reference. The control loop pensation ponents connect between this pin and the FB...