Fast PFET Buck Controller

The CS51033 is a switching controller for use in dc–dc converters. It can be used in the buck topology with a minimum number of external components. The CS51033 consists of a 1.0 A power driver for controlling the gate of a discrete P–channel transistor, fixed frequency oscillator, short circuit protection timer, programmable Soft Start, precision reference, fast output voltage monitoring comparator, and output stage driver logic with latch.

FEATUREs
• 1.0 A Totem Pole Output Driver
• High Speed Oscillator (700 kHz max)
• No Stability Compensation Required
• Lossless Short Circuit Protection
• 2.0% Precision Reference
• Programmable Soft Start
• Wide Ambient Temperature Range:
    ♦ Industrial Grade: –40°C to 85°C
    ♦ Commercial Grade: 0°C to 70°C