TDA3683

TDA3683 Multiple voltage regulator with switch and ignition buffer Rev. 02 — 7 October 2005 Product data sheet 1. General description The TDA3683 is a multiple output voltage regulator with a power switch and an ignition buffer. Several protections and diagnostic options are incorporated in this design. The TDA3683 is primarily developed to cover the complete power supply requirements in car radio applications. The standby regulators (regulators 1, 2 and 3) are especially designed to supply digital circuitry that has to be permanently connected e.g. Controller Area Network (CAN) bus, Digital Signal Processor (DSP) core and the microcontroller. In combination with the reset delay capacitor (pin RDC1 or pin RDC2/3) and the reset function (pin RST1 or pin RST2/3), a proper start-up sequence for a microcontroller is guaranteed. The storage capacitor (pin STC) makes the standby regulator outputs insensitive for short battery drops (e.g. during engine start-up). The switched regulators (regulators 4, 5, 6 and 7) are intended to be used as supply for the tuner, logic, sound processor and CD / tape control. The power switch (pin PSW) can be used for switching the electrically powered antenna, display unit and CD / tape drives. The ignition buffer is intended to produce a clean logic output signal when a polluted ignition key signal is used as input. 2. Features s Three enable pin controlled standby regulators: x REG1: 5 V / 600 mA controlled by the EN1 input x REG2...