It is a monolithic Multifunction Voltage Regulator L4909 ; it contains 3 Regulators (REG1, REG2, REG3) each one with an enable input and a feedback input, to al- low the voltage setting via external resistive divider By STMicroelectronics
L4909 's PackagesL4909 's pdf datasheet

L4909 Pinout, Pinouts
L4909 pinout,Pin out
This is one package pinout of L4909,If you need more pinouts please download L4909's pdf datasheet.

L4909 Application circuits
L4909 circuits
This is one application circuit of L4909,If you need more circuits,please download L4909's pdf datasheet.

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