Multiple voltage regulator with switch

INTEGRATED CIRCUITS DATA SHEET TDA3605Q Multiple voltage regulator with switch Preliminary specification Supersedes data of 1995 Nov 20 File under Integrated Circuits, IC01 1997 Jul 09 Philips Semiconductors Preliminary specification Multiple voltage regulator with switch FEATURES • Two VP-state controlled regulators (regulator 1 and regulator 3) and a power switch • Regulator 2, reset and ignition buffer operates during load dump and thermal shutdown • Separate control pins for switching regulator 1, regulator 3 and the power switch • Supply voltage range of −18 to +50 V (operating from 11 V) • Low reverse current of regulator 2 • Low quiescent current (when regulator 1, regulator 3, and power switch are switched off) • Hold output (only valid when regulator 1 is switched on) • Reset and hold outputs (open collector outputs) • Adjustable reset delay time • High ripple rejection • Back-up capacitor for regulator 2. PROTECTIONS • Reverse polarity safe (down to −18 V without high reverse current) • Able to withstand voltages up to 18 V at the outputs (supply line may be short-circuited) • ESD protected on all pins • Thermal protection • Local thermal protection for power switch • Load dump protection • Foldback current limit protection for regulators 1, 2 and 3 • Delayed second current limit protection for the power switch (at short-circuit) • The regulator outputs and the power switch are DC short-circuited safe to ground and VP. ORDERING INFORMATION PACKAGE TYPE NUMBER NAME TDA3605Q DBS13P DESCRIPTION GENERAL DESCRIPTION TDA3605Q The TDA3605Q is a multiple output voltage regulator with a power switch, intended for use in car radios with or without a microcontroller. It contains: 1. Two fixed voltage regulators with a foldback current protection (regulator 1 and regulator 3) and one fixed voltage regulator (regulator 2), intended to supply a microcontroller, that also operates during load dump and thermal shutdown. 2. A power switch with protections, operated by an enable input. 3. Reset and hold outputs can be used to interface by the microcontroller. The reset signal can be used to call up the microcontroller and the hold output indicates regulator 1 voltage available and within range. 4. A supply pin which can withstand load dump pulses and negative supply voltage. 5. Regulator 2 will be switched on at a supply voltage >6.5 V and off at a voltage of regulator 2 <1.9 V. 6. Also there is a provision for use of a reserve supply capacitor that will hold enough energy for regulator 2 (5 V continuous) to allow a microcontroller to prepare for loss of voltage. VERSION SOT141-6 plastic DIL-bent-SIL power package; 13 leads (lead length 12 mm) 1997 Jul 09 2 Philips Semiconductors Preliminary specification Multiple voltage regulator with switch QUICK REFERENCE DATA SYMBOL Supply VP supply voltage operating reverse battery regulator 2 on jump start load dump protection Iq(tot) Tj VREG1 VREG2 VREG3 Power switch Vsw(d) IswM drop-out voltage peak current Isw = 1 A Isw = 1.8 A − − 3 junction temperature 0.5 mA ≤ IREG1 ≤ 600 mA 0.5 mA ≤ IREG3 ≤ 400 mA t ≤ 10 minutes during ≤50 ms; tr ≥ 2.5 ms 11 −18 2.4 − − − − PARAMETER CONDITIONS MIN. TDA3605Q TYP. MAX. UNIT 14.4 − 14.4 − − 500 − 18 − 18 30 50 600 150 V V V V V µA °C total quiescent supply current standby mode Voltage regulators output voltage regulator 1 output voltage regulator 2 output voltage regulator 3 9.5 4.75 10.0 5.0 5.0 10.5 5.25 5.25 V V V 0.5 mA ≤ IREG2 ≤ 300 mA; VP = 14.4 V 4.75 0.45 1 − 0.7 1.8 − V V A 1997 Jul 09 3 Philips Semiconductors Preliminary specification Multiple voltage regulator with switch BLOCK DIAGRAM TDA3605Q handbook, full pagewidth VP (14.4 V) 1 POWER SWITCH 13 (14.2 V/3 A) 1 A after 10 ms (short-circuit) Vsw 7 Ven(sw) & TEMPERATURE LOAD DUMP PROTECTION BACK-UP SWITCH 12 (14.2 V/100 mA) Vbu BACK-UP CONTROL 11 REGULATOR 2 (5 V/100 mA) REG2 3 & 4 Ven3 REGULATOR 3 (5 V/400 mA) REG3 2 (10 V/600 mA) REG1 & 6 Ven1 REGULATOR 1 8 Vhold TDA3605Q 5 RES 9 VC 10 GND MGB753 Fig.1 Block diagram. 1997 Jul 09 4 Philips Semiconductors Preliminary specification Multiple voltage regulator with switch PINNING SYMBOL VP REG1 REG3 Ven3 RES Ven1 Ven(sw) Vhold VC GND REG2 Vbu Vsw PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 DESCRIPTION supply voltage regulator 1 output regulator 3 output enable input regulator 3 reset output voltage enable input regulator 1 enable input power switch hold output reset delay capacitor ground (0 V) regulator 2 output back-up power switch output voltage Ven1 Ven(sw) Vhold VC 6 7 8 9 handbook, halfpage TDA3605Q VP REG1 REG3 Ven3 RES 1 2 3 4 5 TDA3605Q GND 10 REG2 11 Vbu 12 Vsw 13 MGB752 Fig.2 Pin configuration. FUNCTIONAL DESCRIPTION The TDA3605Q is a multiple output voltage regulator with a power switch, intended for use in car radios with or without a microcontroller. Because of low-voltage operation of the car radio, low-voltage drop regulators are used in the TDA3605Q. Regulator 2 will switch-on when the back-up voltage exceeds 6.5 V for the first time and will switch-off again when the output voltage of regulator 2 is below 1.9 V (this is far below an engine start). When regulator 2 is switched on and the output voltage of this regulator is within its voltage range, the reset output will be enabled (reset will go HIGH via a pull-up resistor) to generate a reset to the microcontroller. The reset cycles can be extended by an external capacitor at pin 9. The above mentioned start-up feature is built-in to secure a smooth start-up of the microcontroller at first connection, without uncontrolled switching of regulator 2 during the start-up sequence. The charge of the back-up capacitor can be used to supply regulator 2 for a short period when the supply falls to 0 V (time depends on value of storage capacitor). When both regulator 2 and the supply voltage (VP > 4.5 V) are available, regulators 1 and 3 can be operated by means of enable inputs (pins 6 and 4 respectively). 1997 Jul 09 5 Regulator 1 has a hold output (open collector) indicating that the output voltage of this regulator is settled (held HIGH by external pull-up resistor) and when the output voltage of this regulator drops out of regulation (because of supply voltage drop or high load) the hold output will go LOW. The hold output signal is only valid when regulator 1 is enabled by its enable input (pin 6). The power switch can also be controlled by means of a separate enable input (pin 7). All output pins are fully protected. The regulators are protected against load dump (regulator 1 and 3 will switch off at supply voltages >18 V) and short-circuit (foldback current protection). The switch contains a current protection, but this protection is delayed at short-circuit condition for at least 10 ms. During this time the output current is limited to a peak value of at least 3 A and 2 A (DC) (VP ≤ 18 V). At supply voltages >17 V the switch is clamped at maximum 16 V (to avoid external connected circuitry being damaged by an overvoltage) and the switch will switch-off at load dump. The total timing of a semi on/off logic set is shown in Fig.3. Philips Semiconductors Preliminary specification Multiple voltage regulator with switch TDA3605Q handbook, full pagewidth load dump VP Vbu 6.5 V 5.4 V 4.0 V 5.0 V 1.9 V 0V 5.0 V 3.0 V 0V 6.0 V regulator 2 reset delay capacitor reset Back-up Schmitt-trigger and reset behaviour load dump 18.0 V 10.4 V 4.5 V 4.0 V VP ≥2.2 V enable regulator 1 ≤2.0 V 10.0 V regulator 1 0V ≥2.2 V enable regulator 3 ≤2.0 V 5.0 V regulator 3 0V VP and enable Schmitt-trigger load dump 16.9 V VP 4.5 V 4.0 V enable power switch ≥2.2 V ≤2.0 V power switch output 0V Switch behaviour MGB759 Fig.3 Timing diagram. 1997 Jul 09 6 Philips Semiconductors Preliminary specification Multiple voltage regulator with switch LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL VP operating jump start load dump protection VP Ptot Tstg Tamb Tj reverse battery voltage total power dissipation storage temperature ambient temperature junction temperature non-operating operating operating t ≤ 10 minutes during ≤50 ms; tr ≥ 2.5 ms non-operating PARAMETER supply voltage − − − − − −55 −40 −40 18 30 50 CONDITIONS MIN. TDA3605Q MAX. V V V V W UNIT −18 62 +150 +85 +150 °C °C °C THERMAL CHARACTERISTICS SYMBOL Rth j-c Rth j-a PARAMETER thermal resistance from junction to case thermal resistance from junction to ambient in free air VALUE 2 50 UNIT K/W K/W CHARACTERISTICS VP = 14.4 V; Tamb = 25 °C; see Fig.6; unless otherwise specified. SYMBOL Supply VP supply voltage operating regulator 2 on jump start load dump protection Iq quiescent current note 1 t ≤ 10 minutes during ≤50 ms; tr ≥ 2.5 ms VP = 12.4 V; note 2; IR2 = 0.1 mA VP = 14.4 V; note 2; IR2 = 0.1 mA Vthr Vthf Vhys Vthr Vthf Vhys rising voltage threshold falling voltage threshold hysteresis 11 2.4 − − − − 14.4 14.4 − − 500 520 18 18 30 50 600 − V V V V µA µA PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Schmitt-trigger power supply for switch, regulator 1 and regulator 3 4.0 3.5 − 4.5 4.0 0.5 5.0 4.5 − V V V Schmitt-trigger power supply for regulator 2 rising voltage threshold falling voltage threshold hysteresis 6.0 1.7 − 6.5 1.9 4.6 7.1 2.2 − V V V 1997 Jul 09 7 Philips Semiconductors Preliminary specification Multiple voltage regulator with switch TDA3605Q SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Schmitt-trigger for enable input (regulator 1, regulator 3 and switch) Vthr Vthf Vhys ILI Vthr Vthf Vhys Vthr Vthf Vhys ILsink ILO tr tf Reset delay Ich Idch Vthr td charge current discharge current rising voltage threshold delay time C = 47 nF; note 5 2 500 2.5 20 − 1 mA ≤ IREG1 ≤ 600 mA 11 V ≤ VP ≤ 18 V �