Electrical Characteristics—FAN1539MPX, FAN1540MPX, FAN1540MMPX,
FAN1540DX (Continued)
Unless otherwise specified, VIN = 4.50V to 7V, Tj = 25˚C, IMAX (FAN1539) = 1.0A, IMAX (FAN1540) = 1.3A.
Boldface limits apply over operating junction temperature range of 0°C ≤ TJ ≤ 125°C.
Test Conditions
Test Limits
Parameter
Quiescent
Current
Quiescent
Current
Thermal
Shutdown
Thermal
Hysteresis
Symbol
IGND
VIN
VIN ≤ 7V
IOUT
2mA ≤ IOUT ≤ IMAX
Min. Typ.
1.0
IGND
VIN = 5V
0mA ≤ IOUT ≤ 50mA
1.0
TjSD
3.0V ≤ VIN ≤ 5.25V
160
THYST
3.0V ≤ VIN ≤ 5.25V
15
Max.
2.0
2.0
Units
mA
mA
°C
°C
Notes:
6. Dropout voltage is defined as the input to output differential voltage at which the output voltage drops 1% below the
nominal value measured at VIN = 5V.
7. Measured within 10Hz to 10kHz bandwidth.
8. Measured at DC, specified at 120 Hz.
9. CIN = 22µF, COUT = 10µF. Both capacitors are low ESR X7R type.
Test Circuit
VIN
CIN
IN
22µF
DUT OUT
GND
10µF
VOUT
COUT
Notes: 1. Use low ESR capacitors.
2. CIN should be placed as close to VIN as possible.
5
FAN1539/FAN1540 Rev. 1.1.1
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