TDA3683J

TDA3683J Rev. 01 — 13 December 2004 www.DataSheet4U.com Multiple voltage regulator with switch and ignition buffer Preliminary data sheet 1. General description The TDA3683J 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 TDA3683J 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. CAN bus, DPS core and the microcontroller. In combination with the reset delay capacitor (RDC1 or RDC2/3) and the reset function (RST1 or RST2/3), a proper start-up sequence for a microcontroller is guaranteed. The storage capacitor (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 (PSW) can be used for switching the electrically powered antenna, display unit and CD / tape drives The ignition buffer (IGN) 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: 3.3 V / 200 mA controlled by the EN2/3 in...