MPQ4559

– 1.5A, 2MHz, 55V STEP-DOWN CONVERTER AEC-Q100 QUALIFIED

MPQ4559 Rev. 1.01

www.MonolithicPower.com

10

6/9/2013

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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 MPQ4559 oscillating frequency is set by an

from:

FREQ

S

100000

R

(k

Ω) =

- 5

f (kHz)