FAN1538 Fairchild Semiconductor, FAN1538 Datasheet - Page 3

• Manufacturer Part Number: FAN1538
• Description: Dual Channel 1A Low Dropout Linear Regulator with UVLO and Soft-start
• Manufacturer: Fairchild Semiconductor

PRODUCT SPECIFICATION
Electrical Specifications
(Operating Conditions: VIN = 5V, TJ=25°C unless otherwise specified)
The • denotes specifications which apply over the full operating temperature range.
REV. 1.0.2 12/17/03
Thermal Shutdown
Parameter
V1 Output Voltage
V2 Output Voltage (FAN1538A)
V2 Minimum Output Voltage
(FAN1538B)
Reference Voltage (FAN1538B)
(FB)
FB Pin Bias Current
Line Regulation
(Both Outputs)
Load Regulation
(Both Outputs)
Current Limit
(Both Outputs)
Minimum Load Current
(Both Outputs)
Quiescent Current
Ripple Rejection
(Both Outputs)
Under-Voltage Lockout (See Diagram1)
VIN Rising threshold
VIN Falling threshold
V1 & V2 delay start time
V1 softstart slew rate
V2 softstart slew rate
V1 & V2
Shut down Temperature
Thermal hysteresis
VIN = 3.8V
Input
Voltage
Diagram 1: UVLO and Softstart Timing
Conditions
10mA
4.50V
10mA
4.50V
10mA
4.50V
10mA<Iout<1A
4.50V
4.50V
Iout = 10mA
VIN=5.0V
10mA
VIN = 5V
4.50V
VIN = 5V
F = 60Hz, Cout = 22µF
VIN = 5V, Iout =100mA
VIN > UVLO Rising Threshold
R1 = 1250 & R2 = 250 ohms
VIN < 3.4
150 s
Iout
VIN
Iout
VIN
Iout
VIN
VIN
VIN
Iout
VIN
1A
7V
1A
7V
1A
7V
7V
7V
1A
7V
VIN
Time
V3.3
V1.5
•
•
•
•
•
•
•
•
•
•
•
•
VIN = 3.3V
3.234
3.200
2.450
2.420
1.400
1.225
1.210
Min.
1.1
3.4
3.0
10
60
3.300
3.300
2.500
2.500
1.250
1.250
0.005
Typ.
0.05
150
250
550
165
1.5
3.8
3.3
40
6
3.366
3.400
2.550
2.580
1.275
1.290
Max.
0.5
0.5
4.2
3.6
0.5
15
1
FAN1538
Units
mA
mA
µA
dB
%
%
s/V
V
V
V
V
A
V
V
V
s/V
C
C
s
3