• Internal 60-V Start-Up Regulator

• 1-A Peak MOSFET Gate Driver

• VIN Range: 6 V to 60 V (Operates Down to 3 V AfterStart-Up)

• Duty Cycle Limit of 90%

• Programmable UVLO With Hysteresis

• Cycle-by-Cycle Current Limit

• External Synchronizable (AC-Coupled)

• Single Resistor Oscillator Frequency Set

• Slope Compensation

• Adjustable Soft Start

• 10-Pin VSSOP Package

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The LM5022 device is a high-voltage, low-side, N-channel MOSFET controller ideal for usein boost and SEPIC regulators. It contains all of the features required to implement single-endedprimary topologies. Output voltage regulation is based on current-mode control, which eases thedesign of loop compensation while providing inherent input voltage feedforward. The LM5022 includesa start-up regulator that operates over a wide input range of 6 V to 60 V. The PWM controller isdesigned for high-speed capability including an oscillator frequency range up to 2.2 MHz and totalpropagation delays less than 100 ns. Additional features include an error amplifier, precisionreference, line undervoltage lockout, cycle-by-cycle current limit, slope compensation, soft start,external synchronization capability, and thermal shutdown. The LM5022 is available in the 10-pinVSSOP package.