© 2006 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FAN5631/FAN5632 Rev. 1.0.2

5

Electrical Characteristic

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Units

Input Under-voltage Lockout

2

V

No-load Supply Current

No Switching

60

µA

FAN5631, SEL to High

1.5

FAN5631, SEL to Low

1.2

FAN5632, SEL to High

1.5

Output Voltage

FAN5632, SEL to Low

Variable

between

1.5 and 1.2

V

Output Voltage Accuracy

1mA

≤ I

5.5V

-5

+5

%

Load Regulation

0mA

≤ I

0.25

mV/mA

Line Regulation

0.2

4.0

mV/V

Shutdown Supply Current

0.1

1.0

µA

Output Short-circuit Current

(3)

25

mA

Peak Efficiency

90

%

V

Oscillator Frequency

1.5

MHz

TSD

Thermal Shutdown Threshold

150

°C

Thermal Shutdown Threshold

Hysteresis

15

°C

Enable Logic Input High

Voltage

1.3

V

Enable Logic Input Low

Voltage

0.4

V

Enable Logic Input Current

-1

1

µA

1.3

V

0.4

V

-1

1

µA

1.6

ms

Note:

3.

The short-circuit protection is designed to protect against pre-existing short-circuit conditions, such as assembly

normal 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. Immediately following the first thermal shutdown