S-8333CAAA-I8T1U Datasheet, PDF (21/44 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
 Characteristics (Typical Data)
1. Example of Major Temperature Characteristics (Ta = −40 to +85°C)
ISS1 vs. Ta (VIN = 3.3 V)
800
700
fOSC = 1080 kHz (ROSC = 120 kW)
600
500
fOSC = 650 kHz (ROSC = 200 kW)
400
300
200
fOSC = 280 kHz (ROSC = 470 kW)
100
0
-40 -20 0 20 40 60 80 100
Ta [°C]
IEXTH vs. Ta (VIN = 3.3 V)
-200
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
fOSC = 650 kHz, MaxDuty = 73%
(ROSC = 200 kW, RDuty = 300 kW)
-40 -20 0 20 40 60
Ta [°C]
80 100
IEXTL vs. Ta (VIN = 3.3 V)
200
180
160
140
120
100
80
60
40
20
fOSC = 650 kHz, MaxDuty = 73%
(ROSC = 200 kW, RDuty = 300 kW)
0
-40 -20 0 20 40 60
Ta [°C]
80 100
IFB vs. Ta (VIN = 3.3 V)
0.10
0.08
0.06
0.04
0.02
0
0.02
0.04
0.06
0.08
0.10
40 20 0 20 40 60 80 100
Ta [C]
fOSC vs. Ta (VIN = 3.3 V)
1400
1200
fOSC = 1080 kHz (ROSC = 120 kW)
1000
800
fOSC = 650 kHz (ROSC = 200 kW)
600
fOSC = 280 kHz (ROSC = 470 kW)
400
200
0
-40 -20
0
20 40 60 80 100
Ta [°C]
MaxDuty vs. Ta (VIN = 3.3 V)
100
90
80
MaxDuty = 88.5% (ROSC = 200 kRDuty = 100 k)
70
60
MaxDuty = 73% (ROSC = 200 kRDuty = 300 k)
50
40
30
MaxDuty = 47% (ROSC = 200 kRDuty = 640 k)
20
10
0
40 20 0 20 40 60 80 100
Ta [C]
tSS vs. Ta (VIN = 3.3 V)
25.0
20.0
tSS = 20 ms
15.0
10.0
tSS = 10 ms
5.0
0
40 20 0
20 40 60 80 100
Ta [C]
21