FAN5078 Datasheet, PDF (8/16 Pages) Fairchild Semiconductor – DDR/ACPI Regulator Combo

Electrical Specifications (Continued)
Parameter
PWM Output Driver
HDRV Output Resistance
LDRV Output Resistance
PGOOD output
Lower Threshold
Upper Threshold
PGOOD Output Low
Leakage Current
3.3V LDO
Regulation
VTT Regulator
VDDQ IN Current
VREF IN to VTT
Differential Output Voltage
VTT Current Limit
VTT Leakage Current
VTT SNS Input Resistance
VTT PGOOD Threshold
Conditions
Sourcing
Sinking
Sourcing
Sinking
as % of set point, 2μS noise filter
as % of set point, 2μS noise filter
IPGOOD = 1.5 mA
VPULLUP = 5V
I(3.3) from 0-1.25A, VCC > 4.75V
S0 mode, I_VTT=0
I_VTT = 0, T_A=25°C
I_VTT = ± 1.25A (pulsed)
Pulsed (300mS max.)⁽¹⁾
EN = LOW
VTT SNS to GND
Measured at VTT SNS
Drop-Out Voltage
Control Functions
EN, S4ST# Input Threshold
S3#I Input Threshold
S3#I, EN, S4ST# Input Current
Over-Temperature Shutdown
Over-Temperature Hysteresis
S3#O Output Low R_DS(ON)
S3#O Output High Leakage
SBSW Pull-down Resistance
SBSW Pull-up Resistance
SBUSB# Pull-down
Resistance
SBUSB# pull-up resistance
SBSW, SBUSB# Output
Current
I_VTT = ± 1.5A
V(S3#O) = 12V
5V MAIN OK
5V MAIN OK
5V MAIN < UVLO
Notes:
1. Guaranteed by design and characterization, not tested in production.
© 2006 Fairchild Semiconductor Corporation
8
FAN5078 Rev. 1.0.0 • 05/11/06
Min. Typ. Max. Units
1.8
3
Ω
1.8
3
Ω
1.8
3
Ω
1.2
2
Ω
86
92
%
108
115
%
0.5
V
1
µA
3.2
3.3
3.4
V
35
70
mA
-20
20
mV
-40
40
±1.5
±3
±4
A
-20
20
µA
110
KΩ
80
110 % VTT
REF
-0.8
0.8
V
1.0
1.25
1.55
V
1.3
1.5
1.7
V
-1
1
µA
150
°C
25
°C
170
300
Ω
1
5
µA
150
200
Ω
900
1200
Ω
150
200
Ω
550
750
Ω
500
nA
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