ncp5381a ON Semiconductor, ncp5381a Datasheet - Page 13

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

ELECTRICAL CHARACTERISTICS
Soft−Start
Enable Input
Current Limit
Overvoltage Protection
Undervoltage Protection
VID Inputs
1. Guaranteed by design. Not tested in production.
SS Pin Source Current
SS Pin Source Current
Soft−Start Ramp Time
SS Pin Discharge Voltage
Soft−Start Discharge Time
VR11 V
VR11 Dwell Time at V
Enable High Input Leakage Current
Upper Threshold
Lower Threshold
Total Hysteresis
Enable Delay Time
Disable Delay Time
Current Sense Inputs to I
(Note 1)
ILIM Pin Input Bias Current
ILIM Pin Working Voltage Range
(Note 1)
ILIM Input Offset Voltage (Note 1)
Overvoltage Threshold (Note 1)
UVLO Start Threshold
UVLO Stop Threshold
UVLO Hysteresis
Upper Threshold
Lower Threshold
Input Bias Current
Delay before Latching VID Change
(VID De−Skewing)
(0°C < T
BOOT
A
< 70°C; 0°C < T
Parameter
Threshold Voltage
BOOT
LIM
J
(Note 1)
< 85°C; 10.8 V < V
Gain
ENABLE = HI, V
ENABLE = HI, V
VR11 SS mode only
C
PIN
ENABLE = LO
From ENABLE = LO to V
max Discharge Voltage,
C
EN = 3.0 V
V
V
V
Enable transitioning HI to start of SS
voltage rise
Enable transitioning Low to
DRVON = Low
20 mV < (CSx−CSxN) < 60 mV
T
(all CS channels together)
V
V
V
V
Measured from the 1 st edge of a VID
change
A
UPPER
LOWER
UPPER
ILIM
UPPER
LOWER
VIDX
SS
SS
= 25°C
= 1.1 V
CC
= 0.01 mF, DRVON = HI to V
= 0.01 mF
= 2.0 V
= 1.25 V
< 13.2 V; All DAC Codes; C
– V
Test Conditions
LOWER
http://onsemi.com
SS PIN
SS PIN
< 1.1 V
> 1.15 V,
SS PIN
13
<
SS
VCC
= 0.1 mF, F
DAC+160
0.80
0.67
Min
125
−50
400
400
1.5
0.5
5.7
0.3
8.2
7.2
50
70
−
−
−
−
−
−
−
−
−
−
SW
= 400 kHz, unless otherwise stated)
DAC+180
1.081
0.85
0.75
Typ
225
100
100
5.0
2.2
5.0
1.5
6.0
0.1
9.0
8.0
1.0
−
−
−
−
−
−
−
−
−
DAC+200
1000
Max
0.90
0.83
900
130
200
800
500
3.0
3.0
6.3
1.0
2.0
9.5
8.5
50
10
50
−
−
−
−
−
−
Units
V/V
mV
mV
mV
mV
mV
mV
ms
ms
mA
mA
ms
ms
mA
ns
mA
nA
ns
V
V
V
V
V
V
V