Datasheet

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
SLUS564C − JULY 2003 − REVISED OCTOBER 2008
21
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TYPICAL CHARACTERISTICS
Figure 12
1
10
1
10
100 1 k 10 k 100 k
100
1 k
10 k
100 k
SOFTSTART TIME
vs
SOFTSTART CAPACITANCE
C
SSTRT
− Softstart Capacitance − pF
t
SS
− Softstart Time − µs
V
VIN
= 12 V
T
A
= 25°C
Figure 13
200
0 50 100 150−50
250
450
300
500
400
350
OSCILLATOR FREQUENCY
vs
JUNCTION TEMPERATURE
T
J
− Junction Temperature − °C
f
OSC
− Oscillator Frequency − kHz
V
VIN
= 12 V
f
OSC(HI)
f
OSC(TYP)
f
OSC(LO)
Figure 14
500
0 50 100 150−50
550
750
600
800
700
650
850
900
UNDERVOLTAGE PROTECTION THRESHOLD
vs
JUNCTION TEMPERATURE
T
J
− Junction Temperature − °C
V
UVP
− Undervoltage Protection Trip Voltage − mV
V
VIN
= 12 V
DDR = LO
V
VO1_VDDQ
= 2.5 V
DDR = HI
Figure 15
OVERVOLTAGE PROTECTION THRESHOLD
vs
JUNCTION TEMPERATURE
T
J
− Junction Temperature − °C
V
OVP
− Overvoltage Protection Trip Voltage − mV
800
0 50 100 150−50
900
1300
1000
1400
1200
1100
V
VIN
= 12 V
DDR = LO
V
VO1_VDDQ
= 2.5 V
DDR = HI