Multiple voltage regulator with battery detection

INTEGRATED CIRCUITS DATA SHEET TDA3606 Multiple voltage regulator with battery detection Product specification Supersedes data of 1997 Jul 15 File under Integrated Circuits, IC01 1998 Jun 16 Philips Semiconductors Product specification Multiple voltage regulator with battery detection FEATURES • One VP-state controlled regulator • Regulator and reset outputs operate during load dump • Supply voltage range of −18 to +50 V • Low quiescent current (battery detection switched off) • High ripple rejection • Dual reset output. PROTECTIONS • Reverse polarity safe (down to −18 V without high reverse current) • Able to withstand voltages up to 18 V at the output (supply line may be short-circuited) • ESD protected on all pins • Load dump protection • Foldback current limit protection for regulator • DC short-circuit safe to ground and VP of regulator output. QUICK REFERENCE DATA SYMBOL Supply VP supply voltage operating jump start load dump protection Iq(tot) VREG VREGd total quiescent supply current Voltage regulator output voltage regulator drop-out voltage 7 V ≤ VP ≤ 18 V 0.5 mA ≤ IREG ≤ 50 mA IREG = 50 mA 4.85 4.8 − 5.0 5.0 − regulator on t ≤ 10 minutes during 50 ms; tr ≥ 2.5 ms standby mode 5.6 − − − 14.4 − − 95 PARAMETER CONDITIONS MIN. TYP. GENERAL DESCRIPTION TDA3606 The TDA3606 is a low power voltage regulator. It contains: 1. One fixed voltage regulator with a foldback current protection, intended to supply a microprocessor that also operates during load dump 2. A reset-signal can be used to interface with the microprocessor 3. Supply pin can withstand load dump pulses and negative supply voltages 4. Defined start-up behaviour; regulator will be switched on at a supply voltage higher than 7.6 V and off when the output voltage of the regulator drops below 2.4 V. MAX. UNIT 25 30 50 120 V V V µA 5.15 5.2 0.4 V V V ORDERING INFORMATION TYPE NUMBER TDA3606T PACKAGE NAME SO8 DESCRIPTION plastic small outline package; 8 leads; body width 3.9 mm VERSION SOT96-1 1998 Jun 16 2 Philips Semiconductors Product specification Multiple voltage regulator with battery detection BLOCK DIAGRAM TDA3606 handbook, full pagewidth VP (14.4 V) 8 LOAD DUMP PROTECTION 7 REGULATOR (5 V/50 mA) REG REFERENCE 4.7 kΩ 5 RES2 & VC 3 4.7 kΩ 6 RES1 TDA3606 REG 1 BATTERY BUFFER 4 GND MGB852 VI(bat) 2 VO(bat) Fig.1 Block diagram. PINNING SYMBOL VI(bat) VO(bat) VC GND RES2 RES1 REG VP PIN 1 2 3 4 5 6 7 8 DESCRIPTION battery input voltage battery detection output voltage reset delay capacitor ground (0 V) reset 2 output reset 1 output regulator output supply voltage handbook, halfpage VI(bat) 1 2 8 7 VP REG RES1 RES2 VO(bat) VC GND TDA3606T 3 4 MGB856 6 5 Fig.2 Pin configuration. 1998 Jun 16 3 Philips Semiconductors Product specification Multiple voltage regulator with battery detection FUNCTIONAL DESCRIPTION The TDA3606 is a voltage regulator intended to supply a microprocessor (e.g. in car radio applications). Because of low voltage operation of the application, a low-voltage drop regulator is used in the TDA3606. This regulator will switch on when the supply voltage exceeds 7.5 V for the first time and will switch off again when the output voltage of the regulator drops below 2.4 V. When the regulator is switched on, the RES1 and RES2 outputs (RES2 can only be HIGH when RES1 is HIGH) will go HIGH after a fixed delay time (fixed by an external delay capacitor) to generate a reset to the microprocessor. TDA3606 RES1 will go HIGH by an internal pull-up resistor of 4.7 kΩ, and is used to initialize the microprocessor. RES2 is used to indicate that the regulator output voltage is within its voltage range. This start-up feature is built-in to secure a smooth start-up of the microprocessor at first connection, without uncontrolled switching of the regulator during the start-up sequence. All output pins are fully protected. The regulator is protected against load dump and short-circuit (foldback current protection). Interfacing with the microprocessor can be accomplished by means of a battery Schmitt-trigger and output buffer (simple full/semi on/off logic applications). The battery output will go HIGH when the battery input voltage exceeds the HIGH threshold level. handbook, full pagewidth 50 V VP 4.35 V regulator 4.35 V 2.4 V reset 1 reset 2 reset delay capacitor on/off switch 2V 2V battery input 2.1 V 2V battery output MGB857 Fig.3 Timing diagrams. 1998 Jun 16 4 Philips Semiconductors Product specification Multiple voltage regulator with battery detection LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL VP operating jump start load dump protection VP VI(bat)p VI(bat)n Ptot Tstg Tamb Tj reverse battery voltage positive pulse voltage at battery input negative pulse voltage at battery input total power dissipation storage temperature operating ambient temperature junction temperature operating PARAMETER supply voltage regulator on t ≤ 10 minutes during 50 ms; tr ≥ 2.5 ms non-operating VP = 14.4 V; RI = 5 kΩ VP = 14.4 V; RI = 5 kΩ Tamb = 25 °C non-operating − − − − − − − −55 −40 −40 25 30 50 −18 50 −100 0.81 +150 +85 +150 CONDITIONS MIN. TDA3606 MAX. V V V V V V W UNIT °C °C °C THERMAL CHARACTERISTICS SYMBOL Rth j-a PARAMETER CONDITIONS VALUE 155 UNIT K/W thermal resistance from junction to ambient in free air QUALITY SPECIFICATION In accordance with “SNW-FQ-611E”. The number of the quality specification can be found in the “Quality Reference Handbook”. The handbook can be ordered using the code 9397 750 00192. 1998 Jun 16 5 Philips Semiconductors Product specification Multiple voltage regulator with battery detection CHARACTERISTICS VP = 14.4 V; Tamb = 25 °C; see Fig.5; unless otherwise specified. SYMBOL Supplies VP supply voltage operating jump start load dump protection Iq quiescent current regulator on; note 1 t ≤ 10 minutes during 50 ms, tr ≥ 2.5 ms VP = 12.4 V; note 2 VP = 14.4 V; note 2 load dump; VP = 50 V Schmitt-trigger for regulator and reset 1 Vthr Vthf Vhys Vthr Vthf Vhys Vthr Vthf Vhys Isink Rpu Reset delay Io Vthr td Battery buffer VOL VOH IOL IOH LOW-level output voltage HIGH-level output voltage LOW-level output current HIGH-level output current II = 0 mA Io = 5 µA; note 5 VOL ≤ 0.8 V VOH ≥ 3 V 0 − 0.2 0.3 0.05 5.0 0.5 1.0 output current rising voltage threshold delay time Cd = 47 nF; note 4 − 1.4 40 0.75 2.0 125 rising supply voltage threshold falling voltage of regulator threshold hysteresis IREG = 5 mA IREG = 30 mA 6.2 2.2 − − 7.5 2.4 2.25 5.1 5.6 − − − − − 14.4 − − 95 100 5 PARAMETER CONDITIONS MIN. TYP. TDA3606 MAX. UNIT 25 30 50 120 − 15 V V V µA µA mA 8.2 2.6 − − V V V V Schmitt-trigger for battery detection rising voltage threshold falling voltage threshold hysteresis 1.95 1.85 − 2.05 1.95 0.1 2.15 2.05 − V V V Schmitt-trigger for reset 2 rising voltage of regulator falling voltage of regulator hysteresis VRES ≤ 0.8 V; note 3 note 3 note 3 4.3 4.2 − 4.45 4.35 0.1 − 4.7 4.6 4.5 − − 5.7 − 2.8 − V V V Reset 1/2 buffer LOW-level sink current internal pull-up resistor 2 3.7 mA kΩ µA V ms 0.8 5.2 − − V V mA mA 1998 Jun 16 6 Philips Semiconductors Product specification Multiple voltage regulator with battery detection SYMBOL Regulator (IREG = 5 mA) Vo output voltage 0.5 mA ≤ IREG ≤ 50 mA 7 V ≤ VP ≤ 18 V 18 V ≤ VP ≤ 50 V; load dump; IREG = 30 mA Io ∆VREG ∆VREGL SVRR VREGd Iclr Iscr Notes 1. Minimum operating voltage, only if VP has exceeded 7.6 V. output current line regulation load regulation supply voltage ripple rejection drop-out voltage current limit short-circuit current load dump; VP > 25 V 7 V ≤ VP ≤ 18 V 0.5 mA ≤ IREG ≤ 30 mA fi = 200 Hz; Vi(p-p) = 2 V; Io = 5 mA IREG = 50 mA; VP = 5 V; note 6 VREG > 4.5 V; note 7 RL ≤ 0.5 Ω; note 8 4.8 4.85 4.75 − − − 55 − 0.1 15 5.0 5.0 5.0 − 3 − 60 0.27 0.27 60 PARAMETER CONDITIONS MIN. TYP. TDA3606 MAX. UNIT 5.2 5.15 5.25 45 50 50 − 0.4 0.6 − V V V mA mV mV dB V A mA 2. The quiescent current is measured in stand-by mode. So, the battery input is connected to a low voltage source and RL = ∞. 3. The voltage of regulator sinks as a result of a supply voltage drop. Cd C d × V thr 4. The delay time can be calculated with the following formula: t d = ∫ ------ dV thr = ---------------------- (ms) I ch I ch 5. Battery output voltage will be equal or less than the output voltage of regulator. 6. The drop-out voltage of regulator is measured between VP and VREG. 7. At current limit, Iclr is held constant (behaviour according to dashed line in Fig.4). 8. The foldback current protection limits the dissipated power at short-circuit (see Fig.4). handbook, halfpage MGB853 5.0 V VREG 1V Iscr ≥50 mA IREG Iclr Fig.4 Foldback current protection. 1998 Jun 16 7 Philips Semiconductors Product specification Multiple voltage regulator with battery detection TEST AND APPLICATION INFORMATION Test information TDA3606 handbook, full pagewidth 7 VP 8 6 VC 3 regulator output 10 µF reset 1 output RL(RES1) RL(REG) 1 kΩ .. 0.5 Ω VP 10 µF (1) TDA3606 5 reset 2 output 1 kΩ battery input voltage 1 VI(bat) 10 µF 2 4 GND MGB808 RL(RES2) 1 kΩ battery output voltage RL(bat) 1 kΩ (1) Capacitor not required for stability. Fig.5 Test circuit. Application information NOISE The noise at the output of the regulator depends on the bandwidth of the regulator, which can be adjusted by means of the output capacitor. In Table 1 the noise figures are given. Table 1 Noise figures NOISE FIGURE (µV)(1) AT OUTPUT CAPACITOR CL (µF) 10 58 250 47 50 200 100 45 180 of 100 µF is connected directly to pins 8 and 4 (supply and ground) the noise is minimized. STABILITY The regulator is stabilized by means of the output capacitor. The value