S-8333CAAA-I8T1U Datasheet, PDF (25/44 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. Example of External Parts Dependence Characteristics
fOSC vs. ROSC (VIN = 3.3 V)
1600
1400
Ta = -40°C
1200
1000
800
Ta = 25°C
Ta = 85°C
600
400
200
0
0 100 200R_OS3_C00[k_W]400 500 600
MaxDuty vs. RDuty / ROSC (ROSC = 200 kΩ, VIN = 3.3 V)
100
90
80
70
60
Ta = 40C
Ta = 25C
Ta = 85C
50
40
30
20
10
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
RDuty / ROSC
tPRO vs. CSP (VIN = 3.3 V)
350
300
250
200
150
100
50
0
0
0.1 0.2 0.3
CSP [F]
Ta = 40C
Ta = 25C
Ta = 85C
0.4 0.5
25