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S8355 Datasheet(PDF) 17 Page - Seiko Instruments Inc |
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S8355 Datasheet(HTML) 17 Page - Seiko Instruments Inc |
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17 / 72 page  STEP-UP, SUPER-SMALL PACKAGE, 600 kHz, PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER Rev.8.1_01 S-8355/56/57/58 Series 17 (3) 300 kHz Product (F, G and M Types) Table 20 (Ta = 25 °C unless otherwise specified) Item Symbol Condition Min. Typ. Max. Unit Measurement circuit Output voltage VOUT − VOUT(S) × 0.976 VOUT(S) VOUT(S) × 1.024 V 2 Input voltage VIN − − − 10 V 2 Operation start voltage VST1 IOUT = 1 mA − − 0.9 V 2 Oscillation start voltage VST2 No external parts, Voltage applied to VOUT − − 0.8 V 1 Operation holding voltage VHLD IOUT = 1 mA, Judged by decreasing VIN voltage gradually 0.7 − − V 2 Current consumption 1 ISS1 VOUT = VOUT(S) × 0.95 S-835xx15 to 19 − 33.8 56.4 μA 1 S-835xx20 to 29 − 50.3 83.9 μA 1 S-835xx30 to 39 − 68.6 114.4 μA 1 S-835xx40 to 49 − 88.4 147.4 μA 1 S-835xx50 to 59 − 109.4 182.4 μA 1 S-835xx60 to 65 − 131.6 219.3 μA 1 Current consumption 2 ISS2 VOUT = VOUT(S) + 0.5 V S-835xx15 to 19 − 9.7 19.4 μA 1 S-835xx20 to 29 − 9.9 19.7 μA 1 S-835xx30 to 39 − 10.0 20.0 μA 1 S-835xx40 to 49 − 10.2 20.4 μA 1 S-835xx50 to 59 − 10.4 20.7 μA 1 S-835xx60 to 65 − 10.5 21.0 μA 1 Current consumption during shutdown (With shutdown function) ISSS OFF / ON V = 0 V − − 0.5 μA 1 EXT pin output current IEXTH VEXT = VOUT − 0.4 V S-835xx15 to 19 − 4.5 − 8.9 − mA 1 S-835xx20 to 24 − 6.2 − 12.3 − mA 1 S-835xx25 to 29 − 7.8 − 15.7 − mA 1 S-835xx30 to 39 − 10.3 − 20.7 − mA 1 S-835xx40 to 49 − 13.3 − 26.7 − mA 1 S-835xx50 to 59 − 16.1 − 32.3 − mA 1 S-835xx60 to 65 − 18.9 − 37.7 − mA 1 IEXTL VEXT = 0.4 V S-835xx15 to 19 9.5 19.0 − mA 1 S-835xx20 to 24 12.6 25.2 − mA 1 S-835xx25 to 29 15.5 31.0 − mA 1 S-835xx30 to 39 19.2 38.5 − mA 1 S-835xx40 to 49 23.8 47.6 − mA 1 S-835xx50 to 59 27.4 54.8 − mA 1 S-835xx60 to 65 30.3 60.6 − mA 1 Line regulation ΔVOUT1 VIN = VOUT(S) × 0.4 to × 0.6 − 30 60 mV 2 Load regulation ΔVOUT2 IOUT = 10 μA to VOUT(S) / 50 × 1.25 − 30 60 mV 2 Output voltage temperature coefficient OUT OUT V Ta ∆ V ∆ • Ta = −40 to +85°C − ±50 − ppm / °C2 Oscillation frequency fOSC VOUT = VOUT(S) × 0.95 255 300 345 kHz 1 Maximum duty ratio MaxDuty VOUT = VOUT(S) × 0.95 70 78 85 % 1 PWM / PFM switching duty ratio (For S-8356/58 Series) PFMDuty VIN = VOUT(S) − 0.1 V, No-load 10 15 24 % 1 OFF / ON pin input voltage (With shutdown function) VSH Measured oscillation at EXT pin 0.75 − − V 1 VSL1 Judged oscillation stop at EXT pin At VOUT ≥1.5 V − − 0.3 V 1 VSL2 At VOUT <1.5 V − − 0.2 V 1 OFF / ON pin input current (With shutdown function) ISH OFF / ON V = VOUT(S) × 0.95 − 0.1 − 0.1 μA 1 ISL OFF / ON V = 0 V − 0.1 − 0.1 μA 1 Soft start time tSS − 1.5 3.0 6.0 ms 2 Efficiency EFFI − − 85 − % 2 |
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