FAN5631(2006) 查看數據表（PDF） - Fairchild Semiconductor
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FAN5631 Datasheet PDF : 11 Pages
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Electrical Characteristics
VIN = 2.2V to 5.5V, IOUT = 1mA, CIN = 10µF, COUT = 10µF, CB = 1µF, TA = -40°C to +85°C, unless otherwise
noted. Typical values are at TA = 25°C.
Parameter
Conditions
Min.
Typ.
Max. Units
Input Under-Voltage Lockout
2
V
No Load Supply Current
No switching
60
µA
Output Voltage
FAN5631, SEL to HIGH
1.5
V
FAN5631, SEL to LOW
1.2
FAN5632, SEL to HIGH
1.5
FAN5632, SEL to LOW
Variable between
1.5 and 1.2
Output Voltage Accuracy
1mA ≤ IOUT ≤ 150mA,
-5
VIN = 2.7V to 5.5V
+5
%
Load Regulation
0mA ≤ IOUT ≤ 150mA, VIN = 3.6V
0.25
1 mV/mA
Line Regulation
IOUT = 0.1mA
0.2
4
mV/V
Shutdown Supply Current
VEN = 0V
0.1
1
µA
Output Short Circuit Current (Note 4)
VOUT ≤ 150mV
25
mA
Peak Efficiency
90
%
VIN at Configuration Change
Oscillator Frequency
Thermal Shutdown Threshold
VIN decreasing
VIN = 3.6V, IOUT = 150mA
2.22 x VOUT
1.7
150
V
MHz
°C
Thermal Shutdown Threshold Hysteresis
15
°C
Enable Logic Input High Voltage, VIH
Enable Logic Input Low Voltage, VIL
Enable Logic Input Current
1.3
V
0.4
V
-1
1
µA
VSEL Logic Input High Voltage, VIH
VSEL Logic Input Low Voltage, VIL
VSEL Logic Input Current
VOUT Turn On Time
1.3
V
0.4
V
-1
1
µA
1.6
mS
Notes:
4. The short circuit protection is designed to protect against pre-existing short circuit conditions, i.e. assembly shorts
that exist prior to device power-up. The short circuit current limit is 25mAAverage. Short circuit currents in normal
operation are inherently limited by the ON-resistance of the internal FET. Since this resistance is in the range of 1Ω,
in some cases thermal shutdown may occur. However, immediately following the first thermal shutdown event, the
short circuit condition will be treated as pre-existing, and the load current will reduce to 25mAAverage.
4
FAN5631/FAN5632 Rev. 1.0.2
www.fairchildsemi.com
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