FSP3303 datasheet(3/10 Pages) FOSLINK

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4 & 6 CHANNEL CHARGE PUMPS FOR WHITE LED BIAS

2007-4-10

3/10

FSP3302/FSP3303

ELECTRICAL CHARACTERISTICS

(Circuit of the below Figure 1, VIN = 3.5V, TA = 25°C unless otherwise specified.)

Parameter

Symbol

Test Conditions

Min.

Typ.

Max.

Unit

Input Supply Range

VIN

2.7

5.2

Supply Current

3.5

Shutdown Supply Current

µA

Full Scale Output Current

IDMAX

VIN = 3V to 5.5V,

4 LED channels active

Output Current Matching

Between any two channels

0.3

Output Current Line Regulation

0.4

%/V

Charge Pump Switching

Frequency

fQP

1000

1200

1700

kHz

Soft-Start Time

tSS

330

µs

Thermal Shutdown Temperature

Hysteresis = 20°C

160

°C

EN/PROG

Logic Low Threshold

VIL

0.5

Logic High Threshold

VIH

1.4

Programming Low Time

tLOW

0.3

µs

Programming Low Time to

Reinitialize DAC after Finish

tLOW1

µs

Programming Minimum High Time

tHIGHMIN

Programming High Time

tHIGH

µs

Finish High Time

tFINISH

500

µs

Off Timeout

tOFF

300

500

µs

Input Current

µA

TYPICAL APPLICATION CIRCUIT

Figure 1

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