MP8865

– SYNCHRONOUS STEP-DOWN CONVERTER

MP8865 Rev. 1.03

www.MonolithicPower.com

19

1/18/2018

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ADD sets the MP8865 address. The default 7-

bit address of the MP8865 is

“68” (hex) or

“1101000” (binary) if ADD is floated or pulled up

to VCC. The other address of the MP8865 is

“60” (hex) or “1100000” (binary) if ADD is pulled

to ground. When the master sends the address

as an 8-bit value, the 7-bit address should be

followed

by

“0/1”

to

indicate

write/read

operation (see Table 1).

TABLE 1. MP8865 Address

ADD

Address (Hex)

Address (Binary)

A7

A6

A5

A4

A3

A2

A1

A0

(R/W)

Float or Connected to

VCC

D0

1

1

0

1

0

0

0

0

D1

1

1

0

1

0

0

0

1

Connected to GND

C0

1

1

0

0

0

0

0

0

C1

1

1

0

0

0

0

0

1

MP8865 Register Address

The MP8865 contains four registers: register 00

to register 03. Register 00 sets the output

voltage and decides whether the output voltage

is controlled by the FB resistor divider or is set

by

features. Register 02 and 03 are the only read

registers. Register 03 indicates the MP8865

status. The register map is shown in next

section.