MP8865

– SYNCHRONOUS STEP-DOWN CONVERTER

MP8865 Rev. 1.03

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17

1/18/2018

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If

V_BOOT=

“0,”

the

output

voltage

is

voltage is sensed through VOUT), and the FB

feedback control loop is disabled.

If FB is pulled up to VCC, the chip starts up

directly to the default 0.9V output voltage. In

this case, the output voltage is determined by

The output reference voltage scaling is realized

by adjusting the internal reference voltage

(V_REF), which is the non-inverted input of the

error amplifier. After the MP8865 receives a

valid data byte of the output reference voltage

setting, it searches the corresponding reference

voltage from the truth table and then sends the

rate. The slew rate is determined by 3-bits of

another register, which can be read and write

accordingly.