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 Three enable pin controlled standby regulators: REG1: 5 V / 600 mA controlled by the EN1 input REG2: 3.3 V / 200 mA controlled by the EN2/3 input REG3: 1.9 V / 150 mA controlled by the EN2/3 input Four mode pin controlled switched regulators: REG4: 8.5 V / 350 mA REG5: 5 V / 1.8 A REG6: 3.3 V / 1.2 A REG7: 2.4 V to 10 V / 2 A adjustable using external resistor divider One mode pin controlled power switch 2.2 A continuous and 3 A surge, with delayed lower current limit so as to be less sensitive to inrush currents One independent ignition buffer (inverted output, open-collector) with good input protection against high transients A storage capacitor is included to provide back-up supply for the standby regulators in the event of loss of battery supplyTDA3683 Philips Semiconductors Multiple voltage regulator with switch and ignition buffer A hold output (3-state) which can be used to communicate to a microcontroller in the event of an internal or external fault condition, such as: Low supply indication in Standby mode One or more switched regulators (except REG7) out of regulation Power switch output short-circuited to ground Load dump, thermal pre-warning and thermal shutdown Reset outputs (push-pull output stage) can be used to call a microcontroller in a smooth way (adjustable delay) at the rst power-up Two supply pins that can withstand load dump pulses and negative supply voltages the second supply pin (connected to REG5 and REG6) can be supplied from a separate external voltage (e.g. DC-to-DC downconverter) to reduce power dissipation All regulator and power switch outputs are short-circuit proof to ground and supply lines the dissipation is limited in this condition since all regulators (except REG3) and power switch have a foldback current protection incorporated The TDA3683 has three modes of operation: Sleep: all outputs disabled (very low quiescent current) Standby: one or more standby regulators enabled (low quiescent current) On: all outputs enabled The standby regulators (including the reset function) and the ignition buffer also function during load dump and thermal shutdown the switched regulators and power switch will be disabled during these conditions Hysteresis is incorporated on internal switching levels The TDA3683 is protected against Electrostatic Discharge (ESD) on all pins DBS23 package with low thermal resistance and exible leads. 3. Quick reference data Table 1: Quick reference data Symbol Parameter Conditions Min Typ Max Unit Supplies V supply voltage 1 operating 9 14.4 18 V P1 reverse polarity non-operating - - 18 V regulators 1, 2 and 3 on 4.0 14.4 50 V jump start t 10 minutes - - 30 V load dump protection t 50 ms - - 50 V t 2.5 ms r V supply voltage 2 operating 6.5 14.4 18 V P2 reverse polarity non-operating - - 18 V regulators 1, 2 and 3 on 0 - 50 V jump start t 10 minutes - - 30 V load dump protection t 50 ms - - 50 V t 2.5 ms r I total quiescent supply V , V and V < 0.8 V - 5 30 A q(tot) EN1 EN2/3 MODE current V and V < 0.8 V - 300 450 A MODE IGNIN V and V > 2.4 V EN1 EN2/3 T junction temperature operating - 40 - +150 C j TDA3683 2 Koninklijke Philips Electronics N.V. 2005. All rights reserved. Product data sheet Rev. 02 7 October 2005 2 of 31