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MP8796B Datasheet(PDF) 44 Page - Monolithic Power Systems

Part # MP8796B
Description  16V, 30A, Scalable, Digital, Synchronous Step-Down Converter with PMBus
PDF  52 Pages
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Manufacturer  MPS [Monolithic Power Systems]
Direct Link  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP8796B Datasheet(HTML) 44 Page - Monolithic Power Systems

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MP8796B – 16V, 30A, SYNCHRONOUS STEP-DOWN CONVERTER WITH PMBUS
MP8796B Rev. 1.0
www.MonolithicPower.com
44
1/19/2020
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2020 MPS. All Rights Reserved.
MFR_CTRL_COMP (D0h)
The MFR_CTRL_COMP command adjusts the loop compensation of the MP8796B.
Bits
Name
Access
Behavior
Default
Description
[7:5]
RESERVED
R/W
Live
000
[4]
Cff
R/W
Live
0
Sets the feed-forward capacitance when the internal
feedback resistor divider is selected.
0: 20pF
1: 50pF
[3:1]
RAMP
R/W
Live
100
Set the internal ramp compensation to stabilize the loop.
Note: The actual ramp amplitude is related to EAh[3]. Refer
to the register EAh description below for details.
EAh[3] = 0 (single-
phase)
EAh[3] = 1 (multi-phase)
000: 5.6mV ramp
000: 8.6mV ramp
001: 9.8mV ramp
001: 15mV ramp
010: 18mV ramp
010: 27mV ramp
011: 30mV ramp
011: 45mV ramp
100: 8.5mV ramp
100: 13mV ramp
101: 15.1mV ramp
101: 23mV ramp
110: 27mV ramp
110: 41mV ramp
111: 44mV ramp
111: 68mV ramp
[0]
Slave Fault
Detection
R/W
Live
1
Enables or disables the slave fault detection function
through the PG pin.
0: Slave-phase fault detection is enabled
1: Slave-phase fault detection is disabled
MFR_CTRL_VOUT (D1h)
The MFR_CTRL_VOUT command adjusts the output voltage behaviors of the MP8796B.
Bits
Name
Access
Behavior
Default
Description
[7]
RESERVED
R/W
Live
0
[6]
Vo
discharge
R/W
Live
1
1: Output voltage discharge at CTRL low
0: No active output voltage discharge
[5:2]
PG delay
R/W
Live
0000
0000: 1ms
0001: 2ms
…
1110: 15ms
1111: 0ms
[1:0]
VO_RANGE
R/W
Live
00
Chooses the internal voltage divider ratio.
00: VREF / VO = 1, VO = 0.4V to 0.672V, LSB = 2mV
01: VREF / VO = 0.5, VO = 0.4V to 1.344V, LSB = 2mV
10: VREF / VO = 0.25, VO = 0.7V to 2.688V, LSB = 2mV
11: VREF / VO = 0.125, VO = 1.3V to 5.376V, LSB = 2mV
The default value of D1h is 0x40.



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