RT8856 데이터 시트보기 (PDF) - Richtek Technology

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RT8856

Multi-Phase PWM Controller for CPU Core Power Supply

Richtek Technology 

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

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