FAN5068 Datasheet, PDF (6/18 Pages) Fairchild Semiconductor – DDR-1/DDR-2 plus ACPI Regulator Combo

PRODUCT SPECIFICATION
FAN5068
Absolute Maximum Ratings
Absolute maximum ratings are the values beyond which the device may be damaged or have its useful life
impaired. Functional operation under these conditions is not implied.
Parameter
VCC
BOOT, SW, ISNS, HDRV, S3#O
BOOT to SW
All Other Pins
Junction Temperature (T_J)
Storage Temperature
Lead Soldering Temperature, 10 seconds
I(VTT) Peak (Duration < 2ms)
I(VTT) RMS
Min.
–0.3
–20
–65
Typ.
Max.
6.5
28
6.5
VCC+0.3
150
150
300
1.5
1
Units
V
V
V
V
°C
°C
°C
A
A
Recommended Operating Conditions
Parameter
Supply Voltage VCC
I(3.3 ALW)
Ambient Temperature (T_A)
Conditions
Min.
4.5
–10
Typ.
5
Max.
5.5
1.25
85
Units
V
A
°C
Electrical Specifications
Recommended operating conditions, component values per Figure 1 unless otherwise noted.
Parameter
Power Supplies
VCC Current:
S0
S3
S5
VCC UVLO Threshold
5V MAIN UVLO Threshold
Oscillator
Frequency
Ramp Amplitude, pk–pk
Ramp Offset
Reference and Soft Start
Internal Reference Voltage
Soft Start current (I_SS)
SS Discharge on-resistance
Conditions
Min.
LDRV, HDRV Open, FB forced above
regulation point, I(VTT) = 0, EN = 1, S3#I = 1
EN = 1, S3#I = LOW, I(3.3) < 10mA
EN = 0, I(3.3) = 0
Rising VCC
4.0
Falling
3.9
Hysteresis
Rising
4.3
Falling
3.9
Hysteresis
255
Initial ramp after power-up
During PWM / LDO soft start
EN = 0
0.891
Typ.
15
15
2
4.2
4.05
0.150
4.4
4.1
0.300
300
1.8
0.5
0.900
4.5
48
150
Max.
24
24
4
4.4
4.2
4.6
4.2
345
0.909
Units
mA
mA
mA
V
V
V
V
V
V
kHz
V
V
V
µA
Ω
6
REV. 1.0.1 9/9/04