S-8333CAAA-I8T1U Datasheet, PDF (23/44 Pages) Seiko Instruments Inc – PWM CONTROL SWITCHING REGULATOR CONTROLLER

STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER
Rev.4.2_01
S-8333 Series
2. Example of Major Power Supply Dependence Characteristics (Ta = 25°C)
ISS1 vs. VIN
1400
1200
1000
800
600
fOSC = 1080 kHz
(ROSC = 120 kW)
fOSC = 650 kHz
(ROSC = 200 kW)
400
200
0
fOSC = 280 kHz
(ROSC = 470 kW)
01 2 34 567
VIN [V]
IEXTH vs. VIN
-200
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
fOSC = 650 kHz, MaxDuty = 73%
(ROSC = 200 kW, RDuty = 300 kW)
01 2 34 567
VIN [V]
IEXTL vs. VIN
200
180
160
140
120
100
80
60
40
20
fOSC =
(ROSC
=652000kHkzW^,,^MRaD^xut^Dy ^u=ty30=07k3W^%)
0
01 2 34 567
VIN [V]
IFB vs. VIN
0.10
0.08
0.06
0.04
0.02
0
0.02
0.04
0.06
0.08
0.10
01 2 34 567
VIN [V]
fOSC vs. VIN
1400
1200 fOSC = 1080 kHz (ROSC = 120 k9)
1000
800 fOSC = 650 kHz (ROSC = 200 k9)
600
400 ^{fOSC = 280 kHz (ROSC = 470 k9)}
200
0
0
1
2
3
4
5
6
7
VIN [V]
MaxDuty vs. VIN
100
90
80
70
60
50
40
30
20
10
0
01
MaxDuty = 88.5% (ROSC = 200 kRDuty = 100 k)
MaxDuty = 73% (ROSC = 200 kRDuty = 300 k)
MaxDuty = 47% (ROSC = 200 kRDuty = 640 k)
2 34 567
VIN [V]
tSS vs. VIN
25.0
20.0
15.0
tSS = 20 ms
10.0
tSS = 10 ms
5.0
0
01 2 34 567
VIN [V]
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