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S-8337ACDB-P8T1G Datasheet(PDF) 29 Page - Seiko Instruments Inc |
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S-8337ACDB-P8T1G Datasheet(HTML) 29 Page - Seiko Instruments Inc |
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29 / 51 page  STEP-UP, 1.2 MHz HIGH-FREQUENCY, PWM CONTROL SWITCHING REGULATOR CONTROLLER Rev.4.0_01 S-8337/8338 Series 29 3. Example of External Parts Dependence Characteristics fOSC vs. ROSC (VIN = 3.3 V) 1600 1400 1200 1000 800 600 400 200 0 0 100 200 300 400 500 600 ROSC [k Ω] fOSC [kHz] Ta = –40°C Ta = 25°C Ta = 85°C fOSC vs. ROSC (VIN = 5.0 V) 1600 1400 1200 1000 800 600 400 200 0 0 100 200 300 400 500 600 ROSC [k Ω] fOSC [kHz] Ta = –40°C Ta = 25°C Ta = 85°C 100 90 80 70 60 50 40 30 20 10 0 MaxDuty [%] MaxDuty vs. RDuty/ROSC (ROSC = 200 kΩ, VIN = 3.3 V) 0 0.5 1 1.5 2 2.5 3 3.5 RDuty/ROSC 4 4.5 5 Ta = –40°C Ta = 25°C Ta = 85°C 100 90 80 70 60 50 40 30 20 10 0 MaxDuty [%] MaxDuty vs. RDuty/ROSC (ROSC = 200 kΩ, VIN = 5.0 V) 00.5 1 1.5 2 2.5 3 3.5 RDuty/ROSC 4 4.5 5 Ta = –40°C Ta = 25°C Ta = 85°C tPRO vs. CSP (VIN = 3.3 V) 350 300 250 200 150 100 50 0 0 0.1 0.2 0.3 0.4 0.5 CSP [ μF] tPRO [ms] Ta = –40°C Ta = 25°C Ta = 85°C tPRO vs. CSP (VIN = 5.0 V) 350 300 250 200 150 100 50 0 00.1 0.2 0.3 0.4 0.5 CSP [ μF] tPRO [ms] Ta = –40°C Ta = 25°C Ta = 85°C |
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