ncp5381a ON Semiconductor, ncp5381a Datasheet - Page 12

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

ELECTRICAL CHARACTERISTICS
VR_RDY (Power Good) Output
VR_FAN AND VR_HOT
1. Guaranteed by design. Not tested in production.
Saturation Voltage
Rise Time
Output Voltage at Power−up (Note 1)
High – Output Leakage Current
Upper Threshold Voltage
Rising Delay
Falling Delay
NTC Pin Bias Current
VR_FAN Upper Voltage Threshold
VR_FAN Lower Voltage Threshold
VR_FAN Hysteresis
VR_FAN Output Voltage at Powerup
(Note 1)
VR_FAN Output Saturation Voltage
VR_FAN Output Leakage Current
VR_HOT Upper Voltage Threshold
VR_HOT Lower Voltage Threshold
VR_HOT Hysteresis
VR_HOT Output Voltage at Powerup
(Note 1)
VR_HOT Saturation Output Voltage
VR_HOT Output Leakage Current
(0°C < T
A
< 70°C; 0°C < T
Parameter
J
< 85°C; 10.8 V < V
I
External pullup of 1.0 kW to 1.25 V,
C
DVo = 10% to 90%
External VR_RDY pullup resistor of
2.0 kW to 5.0 V,
t
100 ms ≤ t
VR_RDY = 5.5 V via 1.0 K
VCORE increasing,
DAC = 1.3 V
VCORE increasing
VCORE decreasing
0 V < NTC < 5.0 V
Fraction of VREF voltage above
which VR_FAN output pulls low
Fraction of VREF voltage below
which VR_FAN output is open
External Pullup resistor of 2.0 kW to
5.0 V,
t
100 ms ≤ t
I
High Impedance State,
VR_FAN = 5.0 V
Fraction of VREF voltage above
which VR_HOT output pulls low
Fraction of VREF voltage below
which VR_HOT output is open
External Pullup resistor of 2.0 kW to
5.0 V,
t
100 ms ≤ t
I
High Impedance State,
VR_HOT = 5.0 V
SINK
R_VCC
R_VCC
SINK
R_VCC
SINK
LOAD
CC
= 10 mA
= 4.0 mA
= 4.0 mA
= 20 pF,
≤ 3 x t
≤ 3 x t
≤ 3 x t
< 13.2 V; All DAC Codes; C
R_VCC
R_VCC
R_VCC
Test Conditions
R_5V
R_5V
R_5V
http://onsemi.com
≤ 20 ms
≤ 20 ms
≤ 20 ms
,
,
,
12
VCC
= 0.1 mF, F
0.3518
0.2892
0.2732
0.2107
−1.0
Min
210
210
0.3
−
−
−
−
−
−
−
−
−
−
−
−
SW
= 400 kHz, unless otherwise stated)
0.3625
0.3025
0.2815
0.2190
1.40
Typ
300
240
240
5.0
−
−
−
−
−
−
−
−
−
−
−
0.3737
0.2897
0.2272
0.3112
Max
150
270
270
0.4
1.0
1.0
2.0
1.0
1.0
0.3
1.0
1.0
0.3
1.0
−
−
mV below
Units
DAC
mV
mV
ms
ns
mA
ms
mA
mA
mA
V
V
V
V
V
V