FAN1537 Ver la hoja de datos (PDF) - Fairchild Semiconductor
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FAN1537 Datasheet PDF : 8 Pages
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PRODUCT SPECIFICATION
FAN1537
Electrical Characteristics (Operating Conditions: VIN ≤ 7V, TJ=25°C unless otherwise specified.)
The • denotes specifications which apply over the specified operating temperature range of 0°C to 125°C junction temperature.
Parameter
Output Voltages
Conditions
10mA ≤ IOUT ≤ 1A
4.75V ≤ VIN ≤ 7V
Output Voltage
3.3V Output, VIN = 4.5V, IOUT = 1A
Time to Output Voltages Valid From VIN ≥ 4.75V
Reference Voltage, VREF
Line Regulation1,2
(both outputs)
Load Regulation1,2
(both outputs)
10mA ≤ IOUT ≤ 1A
4.75V ≤ VIN ≤ 7V
4.75V ≤ VIN ≤ 7V, IOUT = 10mA
VIN = 4.75V, 10mA ≤ IOUT ≤ 1A
Dropout Voltage
(3.3V output)
∆VOUT = 1%, IOUT = 1A
Current Limit
(both outputs)
VIN = 5V
Minimum Load Current
(both outputs)
4.75V ≤ VIN ≤ 7V
Quiescent Current
Ripple Rejection3
(both outputs)
VIN = 7V
f = 120Hz, COUT = 22µF Tantalum,
VIN = 5V, IOUT = 1A
Long-Term Stability
TA = 125°C, 1000 hrs.
RMS Output Noise (% of VOUT) TA = 25°C, 10Hz ≤ f ≤ 10kHz
Thermal Resistance, Junction to SO-8
Case
TO-252 DPAK
SPAK
Thermal Shutdown
Thermal Shutdown Hysteresis Junction Temperature
Min. Typ. Max. Units
V
1.764 1.8 1.836
• 1.742 1.8 1.858
2.450 2.500 2.550
• 2.420 2.500 2.580
3.234 3.300 3.366
• 3.200 3.300 3.400
• 3.2
V
5 msec
1.225 1.250 1.275 V
• 1.210 1.250 1.290
•
0.005 0.5 %
•
0.05 0.5 %
•
1.100 1.300 V
• 1.3 1.5
A
• 10
mA
•
60
6
15 mA
dB
0.03
0.003
50
3
2
155
10
1.0 %
%
°C/W
°C/W
°C/W
°C
°C
Notes:
1. See thermal regulation specifications for changes in output voltage due to heating effects. Load and line regulation are
measured at a constant junction temperature by low duty cycle pulse testing.
2. Power dissipation is determined by input/output differential and the output current. Guaranteed maximum output power will
not be available over the full input/output voltage range.
3. ESR = 0.2Ω.
4. For adjust only, VOUT = VREF (1 + R1/R2)
REV. 1.1.1 3/20/02
3
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