MP8843 datasheet(17/22 Pages) MPS

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MP8843 – 6V, 3A, SYNCHRONOUS, STEP-DOWN SWITCHER WITH I

2C INTERFACE

MP8843 Rev. 1.0

www.MonolithicPower.com

7/15/2016

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

Figure 2: MP8843 Control Interface

2C Address

The I2C slave address of the MP8843 is 0xD0H /

0xD1H. If another slave address is needed,

please contact the factory.

Table 2: I

2C Slave Address

Hex

W 0xD0

R 0XD1

Address

0x68

2C Enable

The MP8843’s EN can start up and shut down

the convertor. The I2C’s EN can also control the

convertor. The Reg00 VSEL D7 bit is I2C-control

enabled. When writing D7 = 0, the convertor is

off. When writing D7 = 1, the convertor is on.

Both the external EN and I2C EN can control the

converter. The converter works only when both

EN pins are high.

Output Voltage Select

The

MP8843

output

voltage

I2C

programmable. There is no need to set

feedback resistors to obtain a different output

voltage. The default output voltage is 0.9031V,

but can be set from 0.6V to 1.1V in 3.9mV steps

by the I2C. Change the output voltage with the

following steps:

1. Write the Go bit (Reg02 SyCntlreg2 [D5]) to

1. This action means the output voltage can

be set to another value that is not the default

Vo voltage.

2. Write the output reference bit (Reg00 VSEL

[D6:D0]). The output voltage can be

changed according to Table 1.

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