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L4903 Datasheet(PDF) 2 Page - STMicroelectronics |
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L4903 Datasheet(HTML) 2 Page - STMicroelectronics |
2 / 8 page BLOCK DIAGRAM SCHEMATIC DIAGRAM PIN FUNCTIONS N ° Name Function 1 Input 1 Low Quiescent Current 50mA Regulator Input 2 Input 2 100mA Regulator Input. 3 Timing Capacitor If Reg. 2 is switched-ON the delay capacitor is charged with a 10 µA constant current. When Reg. 2 is switched-OFF the delay capacitor is discharged. 4 GND Common Ground 5 Disable Input A high level (> VDT) disables output Reg. 2. 6 Reset Output When pin 3 reaches 5V the reset output is switched low. Therefore tRD =Ct ( 5V 10 µA ); tRD (ms) = Ct (nF). 7 Output 2 5V – 100mA Regulator Output. Enabled if Vo 1> VRT. DISABLE INPUT < VDT and VIN 2 >VIT. If Reg. 2 is switched-OFF the C02 capacitor is discharged. 8 Output 1 5V – 50mA regulator output with low leakage in switch-OFF condition. L4903 2/8 |
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