NCP5388MNR2G datasheet(11/34 Pages) ONSEMI

Part #	NCP5388MNR2G

Description	2/3/4 Phase Buck Controller for VR10 and VR11 Pentium IV Processor Applications

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Manufacturer	ONSEMI [ON Semiconductor]

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NCP5388

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11

ELECTRICAL CHARACTERISTICS

(0°C < TA < 70°C; 0°C < TJ < 85°C; 10.8 V < VCC < 13.2 V; All DAC Codes; CVCC = 0.1 mF, FSW = 400 kHz, unless otherwise stated)

Parameter

Units

Max

Typ

Min

Test Conditions

Modulators (PWM Comparators)

Minimum Pulse Width

Fs = 400 kHz

−

30

40

ns

Magnitude of the PWM Ramp

−

1.0

−

V

0% Duty Cycle

COMP voltage when the PWM

outputs remain LO

−

1.2

−

V

100% Duty Cycle

COMP voltage when the PWM

outputs remain HI

−

2.3

−

V

Minimum PWM Linear Duty Cycle

(Note 1)

FS = 400 kHz

−

90

−

%

PWM Comparator Offset Mismatch

(Note 1)

Between any 2 phases,

FS = 400 kHz

−

40

mV

Phase Angle Error

Between adjacent phases,

FS = 400 kHz

−15

−

15

°

Propagation Delay (Note 1)

Ramp/Comp crossing to Gx high

−

20

−

ns

Propagation Delay (Note 1)

Ramp/Comp crossing to Gx low

−

20

−

ns

PWM Outputs

Output High Voltage

Sourcing 500 mA

3.3

4.0

4.7

V

Output Low Voltage

Sinking 500 mA

−

25

100

mV

Rise Time

CL = 20 pF, DVo = 0.3 to 2.0 V

−

10

−

ns

Fall Time

CL = 20 pF, DVo = Vmax to 0.7 V

−

10

−

ns

Output Impedance – LO State

Resistance to GND (Gx = LO)

−

50

−

W

G4 Gate Pin Source Current during

Phase Detect

−

70

−

mA

Phase Detection Period

−

50

−

ms

G4 Phase Detect Threshold

Resistance

−

1.0

kW

Gate Driver Enable (DRVON)

Output High Voltage

Sourcing 500 mA

4.0

5.3

5.5

V

Output Low Voltage

Sinking 500 mA

−

50

200

mV

Rise Time

CL (PCB) = 20 pF,

DVo = 10% to 90%

−

25

−

ns

Fall Time

CL (PCB) = 20 pF,

DVo = 10% to 90%

−

25

−

ns

Internal Pulldown Resistance

VCC < UVLO Threshold

−

70

140

kW

1. Guaranteed by design. Not tested in production.

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NCP5388MNR2G Datasheet(PDF) 11 Page - ON Semiconductor

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