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FAN5182 Folha de dados(PDF) 6 Page - Fairchild Semiconductor

Nome de Peças FAN5182
Descrição Electrónicos  Adjustable Output, 1-, 2-, or 3-Phase Synchronous Buck Controller
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Fabricante Electrônico  FAIRCHILD [Fairchild Semiconductor]
Página de início  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN5182 Folha de dados(HTML) 6 Page - Fairchild Semiconductor

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© 2005 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5182 • Rev. 1.1.3
6
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) Output Voltage: Normal Mode
EN > 2.0V, RILIMIT = 250kΩ
2.9
3.0
3.1
V
VILIMIT(SD) Output Voltage: In Shutdown
EN < 0.8V, IILIMIT = -100µA
400
mV
IILIMIT(NM)
Output Current: Normal Mode
EN > 2.0V, RILIMIT = 250kΩ
12
µA
Maximum Output Current
60
µA
VCL
Current Limit Threshold
VCSREF - VCSCOMP , RILIMIT = 250kΩ
105
125
145
mV
Current Limit Setting Ratio
VCL/IILIMIT
10.4
mV/µA
VDELAY(NM) Delay Normal Mode Voltage
RDELAY = 250kΩ
2.9
3.0
3.1
V
VDELAY(OC) Delay Over-Current Threshold
RDELAY = 250kΩ
1.7
1.8
1.9
V
tDELAY
Latch-Off Delay Time
(3)
RDELAY = 250kΩ, CDELAY = 12nF
1.5
ms
Soft-Start
IDELAY(SS)
Output Current, Soft-Start Mode
During Start-up Delay < 2.4V
15
20
25
µA
tDELAY(SS)
Soft-Start Delay Time
(3)
RDELAY = 250kΩ, CDELAY = 12nF
500
µs
Enable Input
VIL(EN)
Input Low Voltage
0.8
V
VIH(EN)
Input High Voltage
2.0
V
Input Hysteresis Voltage
100
mV
IIN(EN)
Input Current
-1
+1
µA
Power-Good Comparator
VPWRGD(UV) Under-Voltage Threshold
Relative to FBRTN
600
660
720
mV
VPWRGD(OV) Over-Voltage Threshold
Relative to FBRTN
880
940 1000
mV
VOL(PWRGD) Output Low Voltage
IPWRGD(SINK) = 4mA
225
400
mV
Power-Good Delay Time
200
ns
VCROWBAR Crowbar Trip Point
Relative to FBRTN
0.970 1.050 1.105
V
Crowbar Reset Point
Relative to FBRTN
550
650
750
mV
tCROWBAR
Crowbar Delay Point
(3)
Over-voltage to PWM Going Low
400
ns
PWM Outputs
VOL(PWM)
Output Low Voltage
IPWM(SINK) = 400µA
160
500
mV
VOH(PWM)
Output High Voltage
IPWM(SOURCE) = -400µA
4.0
5
V
Supply
DC Supply Current
5
10
mA
VUVLO
UVLO Threshold Voltage
VCC rising
6.5
6.9
7.3
V
UVLO Hysteresis
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.


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