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