S-8333CAAA-I8T1U Datasheet, PDF (30/44 Pages) Seiko Instruments Inc – PWM CONTROL SWITCHING REGULATOR CONTROLLER

STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER
S-8333 Series
Rev.4.2_01
2. Reference data (1)
The data of (a) output current (IOUT) vs. efficiency (η) characteristics and (b) output current (IOUT) vs. output voltage
(VOUT) characteristics is shown below.
2. 1 VOUT = 13.1 V (RFB1 = 7.5 kΩ, RFB2 = 620 Ω)
(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 = 5.0 V
100 1000
(b) IOUT vs. VOUT
13.20
13.15
13.10
13.05
13.00
12.95
12.90
0.01 0.1
1
10
IOUT [mA]
VIN = 5.0 V
100 1000
(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 = 5.0 V
100 1000
(b) IOUT vs. VOUT
13.20
13.15
13.10
13.05
13.00
12.95
12.90
0.01 0.1
1
10
IOUT [mA]
VIN = 5.0 V
100 1000
(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 = 5.0 V
100 1000
(b) IOUT vs. VOUT
13.20
13.15
13.10
13.05
13.00
12.95
12.90
0.01 0.1
1
10
IOUT [mA]
VIN = 5.0 V
100 1000
30