S-8333CAAA-I8T1U Datasheet, PDF (33/44 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
3. Reference data (2)
The data of output current (IOUT) vs. ripple voltage (Vr) characteristics is shown below.
3. 1 VOUT = 13.1 V (RFB1 = 7.5 kΩ, RFB2 = 620 Ω)
(1) fOSC = 1080 kHz, MaxDuty = 73 %
(ROSC = 120 kΩ, RDuty = 180 kΩ)
100
90
80
70
60
50
40
30
20
10
0
0.01
VIN = 5.0 V
0.1 1
10 100 1000
IOUT [mA]
(3) fOSC = 280 kHz, MaxDuty = 73%
(ROSC = 470 kΩ, RDuty = 750 kΩ)
100
90
80
70
60
50
40
30
20
10
0
0.01
VIN = 5.0 V
0.1 1
10 100 1000
IOUT [mA]
(2) fOSC = 650 kHz, MaxDuty = 73%
(ROSC = 200 kΩ, RDuty = 300 kΩ)
100
90
VIN = 5.0 V
80
70
60
50
40
30
20
10
0
0.01 0.1 1
10
IOUT [mA]
3. 2 VOUT = 9.2 V (RFB1 = 8.2 kΩ, RFB2 = 1.0 kΩ)
(1) fOSC = 1080 kHz, MaxDuty = 73%
(ROSC = 120 kΩ, RDuty = 180 kΩ)
100
90
VIN = 3.3 V
80
VIN = 5.0 V
70
60
50
40
30
20
10
0
0.01 0.1 1
10
IOUT [mA]
100 1000
(2) fOSC = 650 kHz, MaxDuty = 73%
(ROSC = 200 kΩ, RDuty = 300 kΩ)
100
90
VIN = 3.3 V
80
VIN = 5.0 V
70
60
50
40
30
20
10
0
0.01 0.1 1
10
IOUT [mA]
(3) fOSC = 280 kHz, MaxDuty = 73%
(ROSC = 470 kΩ, RDuty = 750 kΩ)
100
90
VIN = 3.3 V
80
VIN = 5.0 V
70
60
50
40
30
20
10
0
0.01 0.1 1
10
IOUT [mA]
100 1000
100 1000
100 1000
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