MP4559 – 1.5A, 2MHz, 55V STEP-DOWN CONVERTER

MP4559 Rev. 1.01

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10

12/23/2013

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Three events can shut down the chip: EN low,

VIN low and thermal shutdown. In the shutdown

procedure, power MOSFET is turned off first to

avoid any fault triggering. The COMP voltage and

the internal supply rail are then pulled down.

Programmable Oscillator

The MP4559 oscillating frequency is set by an

from:

FREQ

S

100000

R(kΩ)=

- 5

f(kHz)