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RT8856 View Datasheet(PDF) - Richtek Technology

Part NameDescriptionManufacturer
RT8856 Multi-Phase PWM Controller for CPU Core Power Supply Richtek
Richtek Technology Richtek
RT8856 Datasheet PDF : 23 Pages
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RT8856
VCC SENSE
(500mV/Div)
PGOOD
(1V/Div)
VRON
(5V/Div)
UGATE
(20V/Div)
Power On from VRON
VIN = 12V, VID = 0.9375V
DPRSLPVR = GND, PSI = High, No Load
Time (1ms/Div)
VCC SENSE
(500mV/Div)
PGOOD
(1V/Div)
VRON
(5V/Div)
UGATE
(2V/Div)
Power Off from VRON
VIN = 12V, VID = 0.9375V
DPRSLPVR = GND, PSI = High, No Load
Time (1ms/Div)
VCC SENSE
(100mV/Div)
UGATE1
(20V/Div)
LGATE1
(1V/Div)
VID0
(2V/Div)
CCM VID Change Up
VIN = 12V, VID change from 0.85V to 0.9375V
VCC SENSE
(100mV/Div)
UGATE1
(20V/Div)
DPRSLPVR = GND, PSI = High, No Load
Time (20μs/Div)
LGATE1
(5V/Div)
VID0
(2V/Div)
CCM VID Change Down
VIN = 12V, VID change from 0.9375V to 0.85V
DPRSLPVR = GND, PSI = High, No Load
Time (20μs/Div)
VCC SENSE
(100mV/Div)
UGATE1
(20V/Div)
LGATE1
(5V/Div)
VID0
(2V/Div)
RFM VID Change Down
VIN = 12V, VID change 0.9375V to 0.85V,
DPRSLPVR = High, No Load
VCC SENSE
(50mV/Div)
CCM Load Transient Response
VIN = 12V, VID = 0.95V, ILOAD = 12A to 51A,
DPRSLPVR = GND, PSI = High
Time (40μs/Div)
UGATE1
(20V/Div)
LGATE1
(5V/Div)
Time (4μs/Div)
DS8856-03 June 2011
www.richtek.com
13
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