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FAN1538DBX 数据表(PDF) 3 Page - Fairchild Semiconductor

部件名 FAN1538DBX
功能描述  Dual Channel 1A Low Dropout Linear Regulator with UVLO and Soft-start
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制造商  FAIRCHILD [Fairchild Semiconductor]
网页  http://www.fairchildsemi.com
标志 FAIRCHILD - Fairchild Semiconductor

FAN1538DBX 数据表(HTML) 3 Page - Fairchild Semiconductor

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PRODUCT SPECIFICATION
FAN1538
REV. 1.0.2 12/17/03
3
Electrical Specifications
(Operating Conditions: VIN = 5V, TJ=25°C unless otherwise specified)
The • denotes specifications which apply over the full operating temperature range.
Diagram 1: UVLO and Softstart Timing
Parameter
Conditions
Min.
Typ.
Max.
Units
V1 Output Voltage
10mA
≤ Iout ≤ 1A
4.50V
≤ VIN ≤ 7V
3.234
3.200
3.300
3.300
3.366
3.400
V
V2 Output Voltage (FAN1538A)
10mA
≤ Iout ≤ 1A
4.50V
≤ VIN ≤ 7V
2.450
2.420
2.500
2.500
2.550
2.580
V
V2 Minimum Output Voltage
(FAN1538B)
10mA
≤ Iout ≤ 1A
4.50V
≤ VIN ≤ 7V
1.400
V
Reference Voltage (FAN1538B)
(FB)
10mA<Iout<1A
4.50V
≤ VIN ≤ 7V
1.225
1.210
1.250
1.250
1.275
1.290
V
FB Pin Bias Current
1µA
Line Regulation
(Both Outputs)
4.50V
≤ VIN ≤ 7V
Iout = 10mA
0.005
0.5
%
Load Regulation
(Both Outputs)
VIN=5.0V
10mA
≤ Iout ≤ 1A
0.05
0.5
%
Current Limit
(Both Outputs)
VIN = 5V
1.1
1.5
A
Minimum Load Current
(Both Outputs)
4.50V
≤ VIN ≤ 7V
10
mA
Quiescent Current
VIN = 5V
615
mA
Ripple Rejection
(Both Outputs)
F = 60Hz, Cout = 22µF
VIN = 5V, Iout =100mA
60
dB
Under-Voltage Lockout (See Diagram1)
VIN Rising threshold
3.4
3.8
4.2
V
VIN Falling threshold
3.0
3.3
3.6
V
V1 & V2 delay start time
VIN > UVLO Rising Threshold
150
µs
V1 softstart slew rate
250
µs/V
V2 softstart slew rate
R1 = 1250 & R2 = 250 ohms
550
µs/V
V1 & V2
VIN < 3.4
0.5
V
Thermal Shutdown
Shut down Temperature
165
°C
Thermal hysteresis
40
°C
VIN
V3.3
VIN = 3.3V
V1.5
Time
Input
Voltage
150
µs
VIN = 3.8V


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