FAN5078D3 查看數據表（PDF） - Fairchild Semiconductor
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FAN5078D3 Datasheet PDF : 18 Pages
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Electrical Specifications
Recommended operating conditions; component values per Figure 1, unless otherwise noted.
Parameter
Power Supplies
S0
VCC Current
S3
S5
VCC UVLO Threshold
5V MAIN UVLO Threshold
5V MAIN Input Resistance
Oscillator
Frequency
Ramp Amplitude, pk–pk(1)
Ramp Offset
Reference and Soft Start
Internal Reference Voltage at 25°C
Reference Temperature Coefficient
ILIM Reference Voltage
Average Soft-Start Current (ISS)
SS Discharge Resistance
SS Complete Threshold
SS Complete Hysteresis
PWM Converter
Load Regulation
FB Bias Current
Under-Voltage Shutdown
Over-Voltage Threshold
ISNS Over-Current Threshold
VDDQ IN Discharge Resistance
COMP Source Current
COMP Sink Current
Error Amp GBW Product(1)
Error Amp DC Gain(1)
Conditions
Min. Typ.
LDRV, HDRV Open, FB forced
above regulation point, I(VTT) = 0,
15
EN=1, S3#I=1
EN=1, S3#I = LOW, I(3.3) < 10mA
15
EN=0, I(3.3) = 0
2
Rising VCC
4.0
4.2
Falling
3.9
4,1
Hysteresis
0.15
Rising
4.3
4.4
Falling
3.9
4.1
Hysteresis
0.30
to GND
35
62
255
300
1.8
0.5
-2μA > IILIM > -18μA
Initial ramp after power-up
During PWM / LDO soft start
EN = 0
0.891
0.882
0.900
20
0.900
4.2
45
150
1.5
50
IOUT from 0 to 15A
as % of set point, 2μs noise filter
as % of set point
RILIM= 56KΩ
EN = 0
VCOMP = 2.5V
VCOMP = 2.5V
-2
-1.8
65
110
-195
20
-1.3
75
115
-170
650
100
5.5
82
Max. Units
24
mA
24
mA
4
mA
4.4
V
4.3
V
V
4.6
V
4.2
V
V
KΩ
345
KHz
V
V
0.909
30
0.918
V
PPM/°C
V
µA
Ω
V
mV
+2
-0.8
80
120
-145
55
%
µA
%
%
µA
Ω
µA
µA
MHz
dB
Continued on the following page…
© 2008 Fairchild Semiconductor Corporation
8
FAN5078D3 • Rev. 1.0.0
www.fairchildsemi.com
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