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S-8340A56AFT-T2-G Datasheet(PDF) 11 Page - Seiko Instruments Inc |
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S-8340A56AFT-T2-G Datasheet(HTML) 11 Page - Seiko Instruments Inc |
11 / 55 page STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER Rev.4.0_01 S-8340/8341 Series 11 (3) 300 kHz, Output Voltage Fixed Type (C Type) Table 7 (Ta = 25 °C unless otherwise specified) Parameter Symbol Conditions Min. Typ. Max. Unit Measurement Circuit Output voltage*1 VOUT(E) VIN = VOUT(S) × 0.6, IOUT = VOUT(S)/50 Ω VOUT(S) × 0.98 VOUT(S) VOUT(S) × 1.02 V 1 Input voltage VIN − − − 6 V 1 Oscillation start voltage VST No external parts. The voltage is applied to VOUT. − − 0.9 V 2 Current consumption 1 ISS1 VOUT = VOUT(S) × 0.95, EXT pin open S-834xC25 − 34 − 210 430 μA 2 S-834xC35 − 44 − 270 520 μA 2 S-834xC45 − 54 − 350 650 μA 2 S-834xC55 − 60 − 440 740 μA 2 Current consumption 2 ISS2 VOUT = VOUT(S) + 0.5 V, EXT pin open − 110 185 μA 2 Current consumption at shutdown ISSS VOUT = VOUT(S) × 0.95, VON/OFF = 0 V − − 3.0 μA 2 EXT pin output current IEXTH VEXT = VOUT(E) − 0.2 V S-834xC25 − 34 −13 −24 − mA − S-834xC35 − 44 −17 −30 − mA − S-834xC45 − 54 −21 −34 − mA − S-834xC55 − 60 −23 −37 − mA − IEXTL VEXT = 0.2 V S-834xC25 − 34 32 56 − mA − S-834xC35 − 44 42 69 − mA − S-834xC45 − 54 50 78 − mA − S-834xC55 − 60 56 85 − mA − Line regulation ΔVOUT1 VIN = VOUT(S) × 0.4 to VOUT(S) × 0.6 IOUT = VOUT(S)/50 Ω − VOUT(S) × 0.5% VOUT(S) × 1% V 1 Load regulation ΔVOUT2 VIN = VOUT(S) × 0.6, 10 μA ≤ IOUT ≤ VOUT(S)/40 Ω − VOUT(S) × 0.5% VOUT(S) × 1% V 1 Output voltage temperature coefficient*2 ΔVOUT ΔTa•VOUT VIN = VOUT(S) × 0.6, IOUT = VOUT(S)/50 Ω Ta = −40 to +85°C − ±100 − ppm/ °C1 Oscillation frequency fOSC VOUT = VOUT(S) × 0.95 Measure waveform at the EXT pin 255 300 345 kHz 2 Maximum duty ratio MaxDuty VIN = VOUT(S) × 0.95 Measure waveform at the EXT pin 73 82 89 % 2 PWM/PFM switching duty ratio (S-8341 Series C type) PFMDuty VIN = VOUT(E) − 0.1 V, under no load 15 21 31 % 1 Current limit detection voltage VSENSE VOUT = VOUT(S) × 0.95 Judge oscillation at the EXT pin or oscillation stop at “L” 90 120 150 mV 2 ON/OFF pin input voltage VSH VOUT = VOUT(S) × 0.95 Judge oscillation at the EXT pin. 0.8 − − V 2 VSL VOUT = VOUT(S) × 0.95 Judge oscillation stop at the EXT pin. − − 0.3 V 2 ON/OFF pin input leakage current ISH VOUT = 6 V, VON/OFF = 6 V −0.1 − 0.1 μA 2 ISL VOUT = 6 V, VON/OFF = 0 V −0.1 − 0.1 μA 2 Soft-start time tSS VIN = VOUT(S) × 0.6, CSS = 4700 pF, IOUT = VOUT(S)/50 Ω, S-8340Cxx 6.0 14.3 28.0 ms 1 Measure time until oscillation occurs at EXT pin. S-8341Cxx 6.0 17.2 28.0 ms 1 Efficiency EFFI VIN = VOUT(S) × 0.6, S-834xC25 − 34 − 83 − % 1 IOUT = VOUT(S)/50 Ω S-834xC35 − 44 − 85 − % 1 S-834xC45 − 54 − 87 − % 1 S-834xC55 − 60 − 87 − % 1 |
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