INTEGRATED CIRCUITS DATA SHEET TDA3608Q Multiple voltage regulator with switch Preliminary specification File under Integrated Circuits, IC01 1997 Aug 14 Philips Semiconductors Preliminary specification Multiple voltage regulator with switch TDA3608Q FEATURES GENERAL DESCRIPTION General The TDA3608Q is a multiple output voltage regulator with a power switch, intended for use in car radios with or without a microcontroller. It contains: • Two VP-state controlled regulators (regulator 1 and 3) and a power switch • 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. • Regulator 2 and reset operate 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 • A power switch with protections, operated by an enable input • Low reverse current of regulator 2 • Reset and hold outputs that 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. • 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) • A supply pin which can withstand load dump pulses and negative supply voltages • Adjustable reset delay time • High ripple rejection • Regulator 2 that will be switched on at a back-up voltage higher than 6.5 V and off when the output voltage of regulator 2 drops below 1.9 V • Back-up capacitor for regulator 2. • 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. 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 • 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 TDA3608Q 1997 Aug 14 DBS13P DESCRIPTION plastic DIL-bent-SIL power package; 13 leads (lead length 12 mm) 2 VERSION SOT141-6 Philips Semiconductors Preliminary specification Multiple voltage regulator with switch TDA3608Q QUICK REFERENCE DATA SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Supply VP supply voltage operating reverse polarity non-operating regulator 2 on 9.5 14.4 18 V − − −18 V 2.4 14.4 50 V jump start t ≤ 10 minutes − − 30 V load dump protection t ≤ 50 ms; tr ≥ 2.5 ms − − 50 V standby mode − 500 600 µA − − 150 °C Iq(tot) total quiescent supply current Tj junction temperature Voltage regulators VO(REG1) output voltage regulator 1 1 mA ≤ IREG1 ≤ 600 mA 8.15 8.5 8.85 V VO(REG2) output voltage regulator 2 0.5 mA ≤ IREG2 ≤ 300 mA; VP = 14.4 V 4.75 5.0 5.25 V VO(REG3) output voltage regulator 3 1 mA ≤ IREG3 ≤ 400 mA 4.75 5.0 5.25 V ISW = 1 A − 0.45 0.7 V ISW = 1.8 A − 1 1.8 V 3 − − A Power switch Vd IM drop-out voltage peak current 1997 Aug 14 3 Philips Semiconductors Preliminary specification Multiple voltage regulator with switch TDA3608Q BLOCK DIAGRAM handbook, full pagewidth VP ENSW (14.4 V) POWER SWITCH 1 13 (14.2 V/3 A) SW 1 A after 10 ms (short-circuit) 7 TEMPERATURE LOAD DUMP PROTECTION & BACK-UP SWITCH 12 (14.2 V/100 mA) BU BACK-UP CONTROL 11 (5 V/100 mA) REG2 REGULATOR 2 3 REGULATOR 3 & (5 V/400 mA) REG3 4 EN3 2 REGULATOR 1 & EN1 REG1 6 8 TDA3608Q CRES 5 9 10 GND Fig.1 Block diagram. 1997 Aug 14 (8.5 V/600 mA) 4 MGK602 HOLD RES Philips Semiconductors Preliminary specification Multiple voltage regulator with switch TDA3608Q PINNING SYMBOL PIN DESCRIPTION handbook, halfpage VP 1 regulator 1 output REG1 2 3 regulator 3 output REG3 3 EN3 4 enable input regulator 3 EN3 4 RES 5 reset output RES 5 EN1 6 enable input regulator 1 EN1 ENSW 7 enable input power switch 6 HOLD 8 hold output ENSW 7 CRES 9 reset delay capacitor HOLD 8 GND 10 ground CRES 9 VP 1 supply voltage REG1 2 REG3 REG2 11 regulator 2 output BU 12 back-up SW 13 power switch output TDA3608Q GND 10 REG2 11 BU 12 SW 13 MGK601 Fig.2 Pin configuration. 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). FUNCTIONAL DESCRIPTION The TDA3608Q 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 TDA3608Q. 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 drops 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 power switch can also be controlled by means of a separate enable input (pin 7) as shown in Fig.3 for the behaviour of the power switch output. All output pins are fully protected. The regulators are protected against load dump (regulators 1 and 3 will switch off at supply voltages >18 V) and short-circuit (foldback current protection). The power 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 continuous (VP ≤ 18 V). At supply voltages >17 V the power switch is clamped at maximum 16 V (to avoid external connected circuitry being damaged by an overvoltage) and the power switch will switch off at load dump. The charge of the back-up capacitor can be used to supply regulator 2 for a short period when the supply falls down to 0 V (time depends on value of storage capacitor). When regulator 2 and the supply voltage (VP > 4.5 V) are both available, regulators 1 and 3 can be operated by means of enable inputs (pins 6 and 4 respectively). 1997 Aug 14 The total timing diagram is shown in Fig.3. 5 Philips Semiconductors Preliminary specification Multiple voltage regulator with switch handbook, full pagewidth TDA3608Q load dump VP Vbu 6.5 V 5.4 V 4.0 V regulator 2 5.0 V 1.9 V 0V reset delay capacitor reset 5.0 V 3.0 V 0V 6.0 V Back-up Schmitt trigger and reset behaviour load dump 18.0 V VP 9.9 V 4.5 V 4.0 V ≥2.2 V enable regulator 1 ≤2.0 V 8.5 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 power switch output ≥2.2 V ≤2.0 V 0V Power switch behaviour Fig.3 Timing diagrams. 1997 Aug 14 6 MGK603 Philips Semiconductors Preliminary specification Multiple voltage regulator with switch TDA3608Q LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL VP PARAMETER CONDITIONS MIN. MAX. UNIT supply voltage operating − 18 V − −18 V reverse polarity non-operating jump start t ≤ 10 minutes − 30 V load dump protection t ≤ 50 ms; tr ≥ 2.5 ms − 50 V − 62 W Ptot total power dissipation Tstg storage temperature non-operating −55 +150 °C Tamb ambient temperature operating −40 +85 °C Tj junction temperature operating −40 +150 °C THERMAL CHARACTERISTICS SYMBOL PARAMETER Rth(j-c) thermal resistance from junction to case Rth(j-a) thermal resistance from junction to ambient 1997 Aug 14 CONDITIONS in free air 7 VALUE UNIT 2 K/W 50 K/W Philips Semiconductors Preliminary specification Multiple voltage regulator with switch TDA3608Q CHARACTERISTICS VP = 14.4 V; Tamb = 25 °C; see Fig.6; unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Supply VP supply voltage operating Iq 9.5 14.4 18 V 2.4 14.4 18 V regulator 2 on note 1 jump start t ≤ 10 minutes − − 30 V load dump protection t ≤ 50 ms; tr ≥ 2.5 ms − − 50 V quiescent supply current VP = 12.4 V; note 2; IREG2 = 0.1 mA − 500 600 µA VP = 14.4 V; note 2; IREG2 = 0.1 mA − 520 − µA 5.0 V Schmitt trigger power supply for regulator 1, regulator 3 and power switch Vthr rising threshold voltage Vthf falling threshold voltage 3.5 4.0 4.5 V Vhys hysteresis voltage − 0.5 − V 4.0 4.5 Schmitt trigger for regulator 2 Vthr rising threshold voltage 6.0 6.5 7.1 V Vthf falling threshold voltage 1.7 1.9 2.2 V Vhys hysteresis voltage − 4.6 − V Schmitt trigger for enable input (regulator 1, regulator 3 and power switch) Vthr rising threshold voltage 1.7 2.2 2.7 V Vthf falling threshold voltage 1.5 2.0 2.5 V Vhys hysteresis voltage IREG = ISW = 1 mA 0.1 0.2 0.5 V ILI input leakage current VEN = 5 V 1 5 10 µA Schmitt trigger for reset Vthr rising threshold voltage of regulator 2 VP rising; IREG1 = 50 mA; note 3 − VREG2 − 0.15 VREG2 − 0.075 V Vthf falling threshold voltage of regulator 2 VP rising; IREG1 = 50 mA; note 3 4.3 VREG2 − 0.35 − V Vhys hysteresis voltage 0.1 0.2 0.3 V Schmitt trigger for hold Vthr rising threshold voltage of regulator 1 VP rising; note 3 − VREG1 − 0.15 VREG1 − 0.075 V Vthf falling threshold voltage of regulator 1 VP rising; note 3 9.2 VREG1 − 0.35 − V Vhys hysteresis voltage 0.1 0.2 0.3 V 1997 Aug 14 8 Philips Semiconductors Preliminary specification Multiple voltage regulator with switch SYMBOL PARAMETER TDA3608Q CONDITIONS MIN. TYP. MAX. UNIT Reset and hold buffer IsinkL LOW-level sink current VRES/HOLD ≤ 0.8 V 2 − − mA ILO output leakage current VP = 14.4 V; VRES/HOLD = 5 V − − 2 µA tr rise time note 4 − 7 50 µs tf fall time note 4 − 1 50 µs Reset delay Ich charge current 2 4 8 µA Idch discharge current 500 800 − µA Vthr rising threshold voltage 2.5 3.0 3.5 V td delay time 20 35 70 ms C = 47 nF; note 5 Regulator 1 (IREG1 = 5 mA unless otherwise specified) VO(off) output voltage off VO output voltage − 1 400 mV 1 mA ≤ IREG1 ≤ 600 mA 8.15 8.5 8.85 V 11 V ≤ VP ≤ 18 V 8.15 8.5 8.85 V ∆V line regulation 11 V ≤ VP ≤ 18 V − 2 75 mV ∆VL load regulation 1 mA ≤ IREG1 ≤ 600 mA − 20 50 mV Iq quiescent current IREG1 = 600 mA − 25 60 mA SVRR supply voltage ripple rejection fi = 3 kHz; Vi(p-p) = 2 V 60 70 − dB Vd drop-out voltage IREG1 = 550 mA; VP = 8.5 V; note 6 − 0.4 0.7 V Im current limit VREG1 > 7.5 V; note 7 0.65 1.2 − A Isc short-circuit current RL ≤ 0.5 Ω; note 8 250 800 − mA 0.5 mA ≤ IREG2 ≤ 150 mA 4.75 5.0 5.25 V IREG2 = 300 mA; note 9 4.75 5.0 5.25 V Regulator 2 (IREG2 = 5 mA unless otherwise specified) VO output voltage ∆V line regulation ∆VL load regulation SVRR supply voltage ripple rejection 1997 Aug 14 7 V ≤ VP ≤ 18 V 4.75 5.0 5.25 V 18 V ≤ VP ≤ 50 V; IREG2 ≤ 150 mA 4.75 5.0 5.25 V 6 V ≤ VP ≤ 18 V − 2 50 mV 18 V ≤ VP ≤ 50 V − 15 75 mV 1 mA ≤ IREG2 ≤ 150 mA − 20 50 mV 1 mA ≤ IREG2 ≤ 300 mA − − 100 mV fi = 3 kHz; Vi(p-p) = 2 V 60 70 − dB 9 Philips Semiconductors Preliminary specification Multiple voltage regulator with switch SYMBOL Vd PARAMETER drop-out voltage TDA3608Q CONDITIONS MIN. TYP. MAX. UNIT IREG2 = 100 mA; VP = 4.75 V; note 6 − 0.4 0.6 V IREG2 = 200 mA; VP = 5.75 V; note 6 − 0.8 1.2 V IREG2 = 100 mA; VBU = 4.75 V; note 10 − 0.2 0.5 V IREG2 = 200 mA; VBU = 5.75 V; note 10 − 0.8 1.0 V Im current limit VREG2 > 4.5 V; note 7 0.32 0.37 − A Isc short-circuit current RL ≤ 0.5 Ω; note 8 20 100 − mA − 1 400 mV Regulator 3 (IREG3 = 5 mA unless otherwise specified) VO(off) output voltage off VO output voltage 1 mA ≤ IREG3 ≤ 400 mA 4.75 5.0 5.25 V 7 V ≤ VP ≤ 18 V 4.75 5.0 5.25 V ∆V line regulation 7 V ≤ VP ≤ 18 V − 2 50 mV ∆VL load regulation 1 mA ≤ IREG3 ≤ 400 mA − 20 50 mV Iq quiescent current IREG3 = 400 mA − 15 40 mA SVRR supply voltage ripple rejection fi = 3 kHz; Vi(p-p) = 2 V 60 70 − dB Vd drop-out voltage IREG3 = 400 mA; VP = 5.75 V; note 6 − 1 1.5 V Im current limit VREG3 > 4.5 V; note 7 0.45 0.70 − A Isc short-circuit current RL ≤ 0.5 Ω; note 8 100 400 ISW = 1 A; note 11 − 0.45 0.7 V ISW = 1.8 A; note 11 − 1.0 1.8 V mA Power switch Vd drop-out voltage Idc continuous current VP = 16 V, VSW = 13.5 V 1.8 2.0 − A Vcl clamping voltage VP ≥ 17 V 13.5 15.0 16.0 V IM peak current VP = 17 V; notes 12 and 13 3 − − A Vfb fly back voltage behaviour ISW = −100 mA − VP + 3 22 V Isc short-circuit current 0.8 − A VP = 14.4 V; VSW < 1.2 V; note 13 Back-up switch Idc continuous current 0.3 0.35 − A Vcl clamping voltage VP ≥ 16.7 V − − 16 V Ir reverse current VP = 0; VBU = 12.4 V; note 14 − − 900 mA 1997 Aug 14 10 Philips Semiconductors Preliminary specification Multiple voltage regulator with switch TDA3608Q Notes 1. Minimum operating voltage, only if VP has exceeded 6.5 V. 2. The quiescent current is measured in the standby mode. So, the enable inputs of regulators 1, 3 and the switch are grounded and RL(REG2) = ∞ (see Fig.6). 3. The voltage of the regulator sinks as a result of a VP drop. 4. The rise and fall time is measured with a 10 kΩ pull-up resistor and a 50 pF load capacitor. C 3 5. The delay time depends on the value of the capacitor: t d = ------ × V C (th) = C × ( 750 ×10 ) ( ms ) I ch 6. The drop-out voltage of regulators 1, 2 and 3 is measured between VP and REGn. 7. At current limit, IREGmn is held constant (see Fig.4 for behaviour of IREGmn). 8. The foldback current protection limits the dissipated power at short-circuit (see Fig.4). 9. The peak current of 300 mA can only be applied for short periods (t < 100 ms). 10. The drop-out voltage measured between BU and REG2. 11. The drop-out voltage of the power switch is measured between VP and SW. 12. The maximum output current of the power switch is limited to 1.8 A when the supply voltage exceeds 18 V. 13. At short-circuit, Isc of the power switch is held constant to a lower value than the continuous current after a delay of at least 10 ms (see Fig.5). 14. The reverse current of the back-up switch is measured when flowing out of pin VP with VP = 0 V. 1997 Aug 14 11 Philips Semiconductors Preliminary specification Multiple voltage regulator with switch handbook, halfpage TDA3608Q MGK604 8.5 V handbook, halfpage VO(REG2) VO(REG1) MGK655 5.0 V 2V 1V ≥300 mA IREGsc1 IREGsc2 ≥50 mA IREGm1 IREG1 b. Regulator 2. a. Regulator 1. handbook, halfpage VO(REG3) MGK656 5.0 V 1V IREGsc3 ≥200 mA IREGm3 IREG3 c. Regulator 3. Fig.4 Foldback current protection of the regulators. handbook, halfpage MGB758 ≥3 Isw (A) 1.8 t (ms) ≥10 VSW ≥ 5 V. Fig.5 Current protection of the power switch. 1997 Aug 14 IREGm2 IREG2 12 Philips Semiconductors Preliminary specification Multiple voltage regulator with switch TDA3608Q TEST AND APPLICATION INFORMATION Test information handbook, full pagewidth supply voltage C1 220 nF VP power switch output 13 1 (1) R4 2.2 Ω enable input power switch 11 7 1 kΩ C2 220 nF 5V regulator 2 output C3 10 µF VENSW enable input regulator 1 6 2 RL(REG2) 1 kΩ regulator 1 output 10 V C4 10 µF VEN1 enable input regulator 3 TDA3608Q 4 3 regulator 3 output RL(REG1) 1 kΩ 5V C5 10 µF VEN3 reset delay capacitor 9 5 C6 1 µF back-up R1 1 kΩ C8 220 nF RL(REG3) 1 kΩ R2 10 kΩ reset output C7 47 nF Vbu RL(sw) R3 10 kΩ hold output 12 8 10 GND MGK605 (1) Capacitor not required for stability. Fig.6 Test circuit. Application information Table 1 Noise figures NOISE FIGURE(1) NOISE REGULATOR The noise on the supply line depends on the value of the supply capacitor and is caused by a current noise (output noise of the regulators is translated into a current noise by means of the output capacitors). Table 1 shows the noise figure with the corresponding output capacitor for each regulator. The noise is minimal when a high frequency capacitor of 220 nF in parallel with an electrolytic capacitor of 100 µF is connected directly to pins VP and GND. 1997 Aug 14 CO = 10 µF CO = 47 µF CO = 100 µF 1 225 µV 150 µV 135 µV 2 225 µV 150 µV 135 µV 3 255 µV 200 µV 180 µV Note 1. Measured at a bandwidth of 200 kHz. 13 Philips Semiconductors Preliminary specification Multiple voltage regulator with switch TDA3608Q decreased to 73 µF and the ESR is increased to 1.1 Ω. The regulator will remain stable at −30 °C (see Fig.7). STABILITY The regulators are made stable with the external connected output capacitors. The output capacitors can be selected using the graphs of Figs 7 and 8. When an electrolytic capacitor is used, the temperature behaviour of this output capacitor can cause oscillations at low temperature. The next two examples show how an output capacitor value is selected. The regulator 2 is made stable with a 10 µF electrolytic capacitor (ESR = 3 Ω). At −30 °C the capacitor value is decreased to 3 µF and the ESR is increased to 23.1 Ω. The regulator will be instable at −30 °C (see Fig.8). Example 1 Solution The regulator 1 is made stable with an electrolytic output capacitor of 220 µF, Equivalent Series Resistance (ESR) = 0.15 Ω. At −30 °C the capacitor value is Use a tantalum capacitor of 10 µF or a larger electrolytic capacitor. The use of tantalum capacitors is recommended to avoid problems with stability at low temperatures. Example 2 handbook, halfpage handbook, halfpage MBK099 14 maximum ESR MBK100 4 R 12 (Ω) 10 maximum ESR R (Ω) 3 8 stable region 2 stable region 6 4 1 2 minimum ESR 0 1 10 100 0.22 C (µF) Fig.7 1 10 100 C (µF) Curves for selecting value of output capacitor for regulators 1 and 3. 1997 Aug 14 minimum ESR 0 Fig.8 14 Curves for selecting value of output capacitor for regulator 2. Philips Semiconductors Preliminary specification Multiple voltage regulator with switch TDA3608Q PACKAGE OUTLINE DBS13P: plastic DIL-bent-SIL power package; 13 leads (lead length 12 mm) SOT141-6 non-concave Dh x D Eh view B: mounting base side d A2 B j E A L3 L Q c 1 13 e1 Z e bp e2 m w M 0 5 v M 10 mm scale DIMENSIONS (mm are the original dimensions) UNIT A A2 bp c D (1) d Dh E (1) e e1 e2 Eh j L L3 m Q v w x Z (1) mm 17.0 15.5 4.6 4.2 0.75 0.60 0.48 0.38 24.0 23.6 20.0 19.6 10 12.2 11.8 3.4 1.7 5.08 6 3.4 3.1 12.4 11.0 2.4 1.6 4.3 2.1 1.8 0.8 0.25 0.03 2.00 1.45 Note 1. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION REFERENCES IEC JEDEC EIAJ ISSUE DATE 92-11-17 95-03-11 SOT141-6 1997 Aug 14 EUROPEAN PROJECTION 15 Philips Semiconductors Preliminary specification Multiple voltage regulator with switch TDA3608Q The device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the specified maximum storage temperature (Tstg max). If the printed-circuit board has been pre-heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit. SOLDERING Introduction There is no soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and surface mounted components are mixed on one printed-circuit board. However, wave soldering is not always suitable for surface mounted ICs, or for printed-circuits with high population densities. In these situations reflow soldering is often used. Repairing soldered joints Apply a low voltage soldering iron (less than 24 V) to the lead(s) of the package, below the seating plane or not more than 2 mm above it. If the temperature of the soldering iron bit is less than 300 °C it may remain in contact for up to 10 seconds. If the bit temperature is between 300 and 400 °C, contact may be up to 5 seconds. This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our “IC Package Databook” (order code 9398 652 90011). Soldering by dipping or by wave The maximum permissible temperature of the solder is 260 °C; solder at this temperature must not be in contact with the joint for more than 5 seconds. The total contact time of successive solder waves must not exceed 5 seconds. DEFINITIONS Data sheet status Objective specification This data sheet contains target or goal specifications for product development. Preliminary specification This data sheet contains preliminary data; supplementary data may be published later. Product specification This data sheet contains final product specifications. Limiting values Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information Where application information is given, it is advisory and does not form part of the specification. LIFE SUPPORT APPLICATIONS These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such improper use or sale. 1997 Aug 14 16 Philips Semiconductors Preliminary specification Multiple voltage regulator with switch TDA3608Q NOTES 1997 Aug 14 17 Philips Semiconductors Preliminary specification Multiple voltage regulator with switch TDA3608Q NOTES 1997 Aug 14 18 Philips Semiconductors Preliminary specification Multiple voltage regulator with switch TDA3608Q NOTES 1997 Aug 14 19 Philips Semiconductors – a worldwide company Argentina: see South America Australia: 34 Waterloo Road, NORTH RYDE, NSW 2113, Tel. +61 2 9805 4455, Fax. +61 2 9805 4466 Austria: Computerstr. 6, A-1101 WIEN, P.O. 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The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. Printed in The Netherlands 547027/1200/01/pp20 Date of release: 1997 Aug 14 Document order number: 9397 750 02238