MP8867GLE datasheet(20/27 Pages) MPS

20 / 27 page

MP8867 – SYNCHRONOUS STEP-DOWN CONVERTER

MP8867 Rev.1.01

www.MonolithicPower.com

2/21/2017

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

2. Reg01 SysCntlreg1

NAME

BITS

DEFAULT

DESCRIPTION

D[7]

2C controlled turn on or turn off of the part. When the external EN is

low, the converter is off, and I

2C shuts down. When EN is high, the EN

bit will take over. The default EN bit is “1.”

GO_BIT

D[6]

Switch bit of the I

2C writing authority output reference command

only.

Set GO_BIT=”1” to enable the I

2C authority writing output

reference. When the command is finished, GO_BIT will auto reset to “0”

to prevent false operation of the VOUT scaling. If the reference

adjustment is within 50mV, GO_BIT will not reset to “0” automatically. In

this case, manually set GO_BIT to “0.” It is recommended to write

GO_BIT=”1” first before writing the output reference voltage.

Slew Rate

D[5:3]

100

D[5:3]

Slew Rate

D[5:3]

Slew Rate

000

64 mV/µs

100

4 mV/µs

001

32 mV/µs

101

2 mV/µs

010

16 mV/µs

110

1 mV/µs

011

8 mV/µs

111

0.5 mV/µs

Switching

Frequency

D[2:1]

500kHz

750KHz

1MHz

1.5MHz

Mode

PFM enable/disable bit.

A “0” enables PFM mode, and a high disables

PFM mode. The default is forced CCM.

3. Reg02 ID1

NAME

BITS

DESCRIPTION

Vendor ID

D[7:4]

1000

IC Revision

D[3:0]

IC revision

4. Reg03 Status

NAME

BITS

DESCRIPTION

Reserved

D[7:5]

Reserved for future use.

Always set to 0.

VID_OK

D[4]

2C controlled voltage adjustment is done. The internal circuit compares the DAC

output with VOUT . If VOUT is in the 90%-110% range of the DAC output, the VID_OK bit

is high, which means the voltage scaling is finished. Otherwise, VID_OK= “0.” VID_OK

compares DAC with VOUT/FB. UV is 90%+-3%, OV is 110%+-3%.

D[3]

Output over-current indication.

When the bit is high, the IC is in hiccup mode.

OTEW

D[2]

Die temperature early warning bit.

When the bit is high, the die temperature is higher

than 120˚C.

D[1]

Over-temperature indication

. When the bit is high, the IC is in thermal shutdown.

D[0]

Output power good indication.

When the bit is high, VOUT power is good. This means

that VOUT is higher than 90% of the designed regulation voltage. See additional details

in the Power Good Indicator section.

MP8867GLE Datasheet(PDF) 20 Page - Monolithic Power Systems

MP8867GLE Datasheet(HTML) 20 Page - Monolithic Power Systems

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27

Datasheet Download

Link URL