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CS51033GDR8
Fast PFET Buck Controller
CS51033
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.
The high frequency oscillator allows the use of small inductors and
output capacitors, minimizing PC board area and systems cost. The
programmable Soft Start reduces current surges at start up. The short
circuit protection timer significantly reduces the PFET duty cycle to
approximately 1/30 of its normal cycle during short circuit conditions.
The CS51033 is available in an 8–Lead SO package.
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
