ncp5381a ON Semiconductor, ncp5381a Datasheet - Page 11

• Manufacturer Part Number: ncp5381a
• Description: 2/3/4 Phase Buck Controller For Vr10 And Vr11 Pentium Iv Processor Applications
• Manufacturer: ON Semiconductor

ELECTRICAL CHARACTERISTICS
Modulators (PWM Comparators)
PWM Outputs
Gate Driver Enable (DRVON)
1. Guaranteed by design. Not tested in production.
Minimum Pulse Width
Magnitude of the PWM Ramp
0% Duty Cycle
100% Duty Cycle
Minimum PWM Linear Duty Cycle
(Note 1)
PWM Comparator Offset Mismatch
(Note 1)
Phase Angle Error
Propagation Delay (Note 1)
Propagation Delay (Note 1)
Output High Voltage
Output Low Voltage
Rise Time
Fall Time
Output Impedance – LO State
G4 Gate Pin Source Current during
Phase Detect
Phase Detection Period
G4 Phase Detect Threshold
Resistance
Output High Voltage
Output Low Voltage
Rise Time
Fall Time
Internal Pulldown Resistance
(0°C < T
A
< 70°C; 0°C < T
Parameter
J
< 85°C; 10.8 V < V
Fs = 400 kHz
COMP voltage when the PWM
outputs remain LO
COMP voltage when the PWM
outputs remain HI
F
Between any 2 phases,
F
Between adjacent phases,
F
Ramp/Comp crossing to Gx high
Ramp/Comp crossing to Gx low
Sourcing 500 mA
Sinking 500 mA
C
C
Resistance to GND (Gx = LO)
Sourcing 500 mA
Sinking 500 mA
C
DVo = 10% to 90%
C
DVo = 10% to 90%
V
S
S
S
CC
L
L
L
L
= 400 kHz
= 400 kHz
= 400 kHz
= 20 pF, DVo = 0.3 to 2.0 V
= 20 pF, DVo = Vmax to 0.7 V
(PCB) = 20 pF,
(PCB) = 20 pF,
CC
< UVLO Threshold
< 13.2 V; All DAC Codes; C
Test Conditions
http://onsemi.com
11
VCC
= 0.1 mF, F
Min
−15
3.3
4.0
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
SW
= 400 kHz, unless otherwise stated)
Typ
1.0
1.2
2.3
4.0
5.3
30
90
20
20
25
10
10
50
70
50
50
25
25
70
−
−
−
Max
100
200
140
4.7
1.0
5.5
40
40
15
−
−
−
−
−
−
−
−
−
−
−
−
−
Units
mV
mV
mV
kW
kW
ns
ns
ns
ns
ns
mA
ms
ns
ns
%
V
V
V
V
W
V
°