4

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FAN5631/FAN5632 Rev. 1.0.2

Electrical Characteristics

Notes:

4. The short circuit protection is designed to protect against pre-existing short circuit conditions, i.e. assembly shorts

operation are inherently limited by the ON-resistance of the internal FET. Since this resistance is in the range of 1

Ω,

in some cases thermal shutdown may occur. However, immediately following the first thermal shutdown event, the

Parameter

Conditions

Min.

Typ.

Max.

Units

Input Under-Voltage Lockout

2

V

No Load Supply Current

No switching

60

µA

Output Voltage

FAN5631, SEL to HIGH

1.5

V

FAN5631, SEL to LOW

1.2

FAN5632, SEL to HIGH

1.5

FAN5632, SEL to LOW

Variable between

1.5 and 1.2

Output Voltage Accuracy

1mA

≤ I

-5

+5

%

Load Regulation

0mA

≤ I

0.25

1

mV/mA

Line Regulation

0.2

4

mV/V

Shutdown Supply Current

0.1

1

µA

Output Short Circuit Current (Note 4)

25

mA

Peak Efficiency

90

%

V

Oscillator Frequency

1.7

MHz

Thermal Shutdown Threshold

150

°C

Thermal Shutdown Threshold Hysteresis

15

°C

1.3

V

0.4

V

Enable Logic Input Current

-1

1

µA

1.3

V

0.4

V

-1

1

µA

1.6

mS