Electrical Characteristics (Continued)
VCC = 12V, FBRTN = GND, • indicates specifications over operating ambient temperature range.(2)
Symbol
Parameter
Conditions
Min. Typ. Max. Units
Current-Limit Comparator
VILIMIT(NM)
VILIMIT(SD)
IILIMIT(NM)
Output Voltage: Normal Mode
Output Voltage: In Shutdown
Output Current: Normal Mode
Maximum Output Current
EN > 2.0V, RILIMIT = 250kΩ
EN < 0.8V, IILIMIT = -100µA
EN > 2.0V, RILIMIT = 250kΩ
• 2.9
•
• 60
3.0 3.1 V
400 mV
12
µA
µA
VCL Current Limit Threshold
Current Limit Setting Ratio
VDELAY(NM) Delay Normal Mode Voltage
VDELAY(OC) Delay Over-Current Threshold
tDELAY Latch-Off Delay Time(3)
Soft-Start
VCSREF - VCSCOMP , RILIMIT = 250kΩ
VCL/IILIMIT
RDELAY = 250kΩ
RDELAY = 250kΩ
RDELAY = 250kΩ, CDELAY = 12nF
105 125 145 mV
10.4
mV/µA
2.9 3.0 3.1 V
1.7 1.8 1.9 V
1.5
ms
IDELAY(SS) Output Current, Soft-Start Mode
tDELAY(SS) Soft-Start Delay Time(3)
Enable Input
During start-up, Delay < 2.4V
RDELAY = 250kΩ, CDELAY = 12nF
• 15 20 25 µA
500
µs
VIL(EN)
VIH(EN)
Input Low Voltage
Input High Voltage
Input Hysteresis Voltage
•
0.8 V
• 2.0
V
100
mV
IIN(EN) Input Current
Power-Good Comparator
• -1
+1 µA
VPWRGD(UV) Under-Voltage Threshold
VPWRGD(OV) Over-Voltage Threshold
VOL(PWRGD) Output Low Voltage
Power-Good Delay Time
Relative to FBRTN
Relative to FBRTN
IPWRGD(SINK) = 4mA
• 600 660 720 mV
• 880 940 1000 mV
•
225 400 mV
200
ns
VCROWBAR Crowbar Trip Point
Crowbar Reset Point
tCROWBAR Crowbar Delay Point(3)
PWM Outputs
Relative to FBRTN
Relative to FBRTN
Over-voltage to PWM going low
• 0.970 1.050 1.105 V
• 550 650 750 mV
400
ns
VOL(PWM)
VOH(PWM)
Supply
Output Low Voltage
Output High Voltage
IPWM(SINK) = 400µA
IPWM(SOURCE) = -400µA
•
160 500 mV
• 4.0
5
V
DC Supply Current
•
5 10 mA
VUVLO
UVLO Threshold Voltage
UVLO Hysteresis
VCC rising
• 6.5 6.9 7.3 V
• 0.7 0.9 1.1 V
Notes:
2. Limits at operating temperature extremes are guaranteed by design, characterization, and statistical quality control.
3. Guaranteed by design, not tested in production.
© 2005 Fairchild Semiconductor Corporation
FAN5182 Rev. 1.1.1
6
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