S-8333CAAA-I8T1U Datasheet, PDF (31/44 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. 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)
(a) IOUT vs. η
100
90
80
70
60
50
40
30
20
10
0
0.01 0.1
1
10
IOUT [mA]
VIN = 3.3 V
VIN = 5.0 V
100 1000
(b) IOUT vs. VOUT
9.30
9.25
9.20
9.15
9.10
9.05
9.00
0.01 0.1
(2) fOSC = 650 kHz, MaxDuty = 73% (ROSC = 200 kΩ, RDuty = 300 kΩ)
(a) IOUT vs. η
100
90
80
70
60
50
40
30
20
10
0
0.01 0.1
1
10
IOUT [mA]
VIN = 3.3 V
VIN = 5.0 V
100 1000
(b) IOUT vs. VOUT
9.30
9.25
9.20
9.15
9.10
9.05
9.00
0.01 0.1
(3) fOSC = 280 kHz, MaxDuty = 73% (ROSC = 470 kΩ, RDuty = 750 kΩ)
(a) IOUT vs. η
100
90
80
70
60
50
40
30
20
10
0
0.01 0.1
1
10
IOUT [mA]
VIN = 3.3 V
VIN = 5.0 V
100 1000
(b) IOUT vs. VOUT
9.30
9.25
9.20
9.15
9.10
9.05
9.00
0.01 0.1
1
10
IOUT [mA]
VIN = 3.3 V
VIN = 5.0 V
100 1000
1
10
IOUT [mA]
VIN = 3.3 V
VIN = 5.0 V
100 1000
1
10
IOUT [mA]
VIN = 3.3 V
VIN = 5.0 V
100 1000
31