STMicroelectronics L4909
EXTERNALLY ADJUSTABLE MULTIFUNCTION REGULATOR
| Part No. | L4909 |
|---|---|
| Datasheet | L4909 Download |
| Manufacturer |  STMicroelectronics |
| Description | EXTERNALLY ADJUSTABLE MULTIFUNCTION REGULATOR |
| Buy | Stock & Price |
DESCRIPTION
It is a monolithic Multifunction Voltage Regulator; it contains 3 regulators, (REG1, REG2, REG3) each one with an enable input and a feedback input, to allow the voltage setting via external resistive divider. BLOCK DIAGRAM REF THERMAL SHUTDOWN EN1 EN2 EN3 6 7 9 + ENABLE CONTROL + REFERENCE GENERATOR REG1 REG2 REG3 + REF+20% + 3,13 + VINA, VINB + REG1 - 2 1 + VO1 FB1 OC 5 OVER CURRENT CHECK 4 + REG2 - 14 15 + + VO2 FB2 TRIG + REG3 GND 8 + - 11 10 VO3 FB3 D00AU1171 May 2000 1/7 L4909 PIN CONNECTION 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 FB2 VO2 VINB N.C. VO3 FB3 EN3 GND EN2 EN1 OC TRIG VINA VO1 FB1 TAB CONNECTED TO PIN 8 D00AU1153 Table 1. PinDESCRIPTION
No. Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Name FB1 Vo1 VinA TRIG OC EN1 EN2 GND EN3 FB3 Vo3 N.C. VinB Vo2 FB2 REG1 feedback voltage input REG1 output voltage Input DC supply voltage Trigger for external SCR (crowbar protection) Over current warning output REG1 enable input REG2 enable input Analog ground REG3 enable input RE...
