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BA3257HFP Datasheet(PDF) 2 Page - Rohm |
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BA3257HFP Datasheet(HTML) 2 Page - Rohm |
2 / 2 page Application Circuit Electrical characteristics (Unless otherwise noted; Ta=25˚C, Vcc=5V, R1=R2=5kΩ) Parameter Symbol Min. Typ. Max. Unit Conditions Circuit current Line regulation 1,2 Load regulation 1,2 [3.3V output] Output voltage Dropout voltage Output current [Variable output] Reference voltage Dropout voltage Output current Io1=0mA, Io2=0mA Vcc=4.75 → 14V, Io1=5mA Io2=5mA → 1A Io1=50mA Io1=1A Io2=50mA Io2=1A, R1=8.2kΩ, R2=5kΩ Ib ∆ VLINE1,2 ∆ VLOAD1,2 Vo1 ∆ VD1 Io1 Vref ∆ VD2 Io2 - - - 3.234 - 1.0 1.225 - 1.0 3 5 5 3.300 1.1 - 1.250 1.1 - 5 15 20 3.366 1.3 - 1.275 1.3 - mA mV mV V V A V V A VREF Thermal Shutdown Current Limit Current Limit 1 2 5 4 ADJ ADJ GND VIN VCC VO2 VOUT2=VREF X (1+R1/R2)+IADJ X R1 VO1 3.3V 3.3µF CIN 1µF CO2 1µF CO1 R2 R1 FIN BA3257FP/HFP |
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