Data Sheet, Rev. 3.4, August 2007 TLE 6711 G/GL Multifunctional Voltage Regulator and Watchdog Automotive Power Multifunctional Voltage Regulator and Watchdog TLE 6711 G TLE 6711 GL Features • • • • • • • • • • • • • • • Step up converter (Boost Voltage) Boost Over- and Under-Voltage-Lockout Step down converter (Logic Voltage) 2% output voltage tolerance Logic Over- and Under-Voltage-Lockout Overtemperature Shutdown Power ON/OFF reset generator Digital window watchdog System Enable Output Ambient operation temperature range -40 °C to 125 °C Wide Supply voltage operation range Very low current consumption Very small PG-DSO-14-1 SMD package Green Product (RoHS Compliant) AEC Qualified P/PG-DSO-14-3, -8, -9, -11, 14 Description P/PG-DSO-20 -1, -6, -7, -9, -14, -15, -17, -18 The TLE 6711 G/GL is a multifunctional power supply circuit especially designed for automotive applications. It delivers a programmable step up voltage (Boost) and a precise 5 V fully short circuit protected output voltage (Buck). The TLE 6711 G/GL contains a power on reset feature to start up the system, an integrated digital window watchdog to monitor the connected microcontroller and a system enable output to indicate the microcontroller window watchdog faults. The device is based on Infineon’s power technology SPT® which allows bipolar and CMOS control circuitry to be integrated with DMOS power devices on the same monolithic circuitry. The very small PG-DSO-14-1 SMD packages meet the application requirements. Furthermore, the build-in features like under- and overvoltage lockout for boost- and buck-voltage and the overtemperature shutdown feature increase the reliability of the TLE 6711 G/GL supply system. Type Package TLE 6711 G PG-DSO-14-1 TLE 6711 GL PG-DSO-20-36 Data Sheet 2 Rev. 3.4, 2007-08-16 TLE 6711 Block Diagram 1 Block Diagram BOFB 12 TLE 6711 G 14 Boost Converter Biasing 13 VBoost 10 VREF 9 BUC 6 Buck Converter 8 7 VInternal 5 R 1 Reset, Window Watchdog and System Enable Reference Current Generator and Oscillator 3 2 11 BOI BOGND BDS VBOOST BUO VCC SEN WDI RO OVL 4 GND Figure 1 Data Sheet AEB02949 Block Diagram (pinning valid for PG-DSO-14-1) 3 Rev. 3.4, 2007-08-16 TLE 6711 Pin Configuration 2 Pin Configuration 2.1 Pin Assignment R RO WDI GND SEN BUC VCC 1 2 3 4 5 6 7 14 13 12 11 10 9 8 BOI BOGND BOFB OVL BDS VBoost BUO AEP02960 Figure 2 Pin Configuration PG-DSO-14-1 (top view) R 1 20 BOI RO 2 19 BOFB WDI 3 18 OVL GND 4 17 GND GND 5 16 GND GND 6 15 GND GND 7 14 GND SEN 8 13 BDS BUC 9 12 VBOOST VCC 10 Figure 3 Data Sheet 11 BUO Pin Configuration PG-DSO-20-36 (top view) 4 Rev. 3.4, 2007-08-16 TLE 6711 Pin Configuration 2.2 Pin Definitions and Functions Pin SO-14 Pin SO-20 Symbol Function 1 1 R Reference Input; an external resistor from this pin to GND determines the reference current and the oscillator frequency 2 2 RO Reset Output; open drain output from reset comparator with an internal pull-up resistor 3 3 WDI Watchdog Input; input for the watchdog control signal from the controller 4 4, 5, 6, 7, GND 14, 15, 16, 17 Ground; analog signal ground 5 8 SEN System Enable Output; open drain output from Watchdog fail-circuit with an internal pull-up resistor 6 9 BUC Buck-Converter Compensation Input; output of internal error amplifier; for loop-compensation connect an external R-C-series combination to GND 7 10 VCC Supply Voltage Output; buck converter output; external blocking capacitor necessary 8 11 BUO Buck Converter Output; source of the integrated power-DMOS 9 12 VBOOST Boost Converter Input; input supply voltage of the IC; coming from the boost converter output voltage; buck converter input voltage 10 13 BDS Buck Driver Supply Input; voltage to drive the buck converter powerstage 11 18 OVL Boost Status Output; open drain output from boost PWM comparator 12 19 BOFB Boost Converter Feedback Input; connect boost voltage divider to this pin; internal reference is the boost feedback threshold VBOFBTH 13 – BOGND Boost-Ground; power signal ground; source of boost converter power-DMOS 14 20 BOI Boost Converter Input; drain of the integrated buck converter power-DMOS Data Sheet 5 Rev. 3.4, 2007-08-16 TLE 6711 General Product Characteristics 3 General Product Characteristics 3.1 Absolute Maximum Ratings Absolute Maximum Ratings 1) Tj = -40 °C to +150 °C; all voltages with respect to ground, positive current flowing into pin (unless otherwise specified) Pos. Parameter Symbol Limit Values Unit Conditions Min. Max. -0.3 46 V – -0.3 46 V – -0.3 46 V – -1 46 V – -0.3 48 V 0 °C < Tj ≤ 150 °C 47 V -40 °C ≤ Tj ≤ 0 °C Voltages 3.1.1 Boost input voltage 3.1.2 Boost output voltage 3.1.3 Boost feedback voltage 3.1.4 Buck output voltage 3.1.5 Buck driver supply voltage VBOI VBOOST VBOFB VBUO VBDS 3.1.6 3.1.7 Buck compensation input voltage 3.1.8 Logic supply voltage 3.1.9 Reset output voltage 3.1.10 System Enable output voltage 3.1.11 Current reference voltage 3.1.12 Watchdog input voltage 3.1.13 OVL output voltage VBUC VCC VRO VSEN VR VWDI VOVL -0.3 6.8 V – -0.3 6.8 V – -0.3 6.8 V – -0.3 6.8 V – -0.3 6.8 V – -0.3 6.8 V – -0.3 6.8 V – Tj Tstg -40 150 °C – -50 150 °C – VHBM -2 2 kV Human Body Model; R = 1.5 kΩ; C = 100 pF Temperatures 3.1.14 Junction Temperature 3.1.15 Storage Temperature ESD Susceptibility 3.1.16 All pins to GND 1) Not subject to production test, specified by design. Attention: Stresses above the ones listed here may cause permanent damage to the device. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Attention: Integrated protection functions are designed to prevent IC destruction under fault conditions described in the data sheet. Fault conditions are considered as “outside” normal operating range. Protection functions are not designed for continuous repetitive operation. Data Sheet 6 Rev. 3.4, 2007-08-16 TLE 6711 General Product Characteristics 3.2 Pos. Operating Range Parameter Symbol Limit Values Unit Conditions Min. Max. VBOI VBOOST -0.3 40 V – 5 35 V VBOOST increasing 3.2.1 Boost input voltage 3.2.2 Boost input voltage; (normal operation) 3.2.3 Boost input voltage; (normal operation) VBOOST 4.5 36 V VBOOST decreasing 3.2.4 Boost input voltage VBOOST -0.3 4.5 V Boost- and BuckConverter OFF 3.2.5 Boost feedback voltage 0 3.0 V – 3.2.6 Buck output voltage -0.6 40 V – 3.2.7 Buck driver supply voltage VBOFB VBUO VBDS -0.3 48 V 0 °C < Tj ≤ 150 °C 47 V -40 °C ≤ Tj ≤ 0 °C 3.2.8 3.2.9 Buck compensation input voltage 3.2.10 Logic supply voltage 3.2.11 Reset output voltage 3.2.12 System Enable output voltage 3.2.13 Watchdog input voltage 3.2.14 Current reference voltage 3.2.15 Junction temperature VBUC VCC VRO VSEN VWDI VR Tj 0 3.0 V – 4.00 6.25 V – -0.3 V – V – 0 VCC + 0.3 VCC + 0.3 VCC + 0.3 V – 0 3.0 V – -40 150 °C – -0.3 Thermal Resistance 3.2.16 Junction ambient PG-DSO-14-1 Rthj-a – 120 K/W – 3.2.17 Junction ambient PG-DSO-20-36 Rthj-a – 65 K/W – Note: In the operating range, the functions given in the circuit description are fulfilled. Data Sheet 7 Rev. 3.4, 2007-08-16 TLE 6711 Circuit Description 4 Circuit Description Below some important sections of the TLE 6711 G/GL are described in more detail. 4.1 Power On Reset In order to avoid any system failure, a sequence of several conditions has to be passed. In case of VCC power down (VCC < VRT for t > tRR) a logic LOW signal is generated at the pin RO to reset an external microcontroller. When the level of VCC reaches the reset threshold VRT, the signal at RO remains LOW for the Power-up reset delay time tRD before switching to HIGH. If VCC drops below the reset threshold VRT for a time extending the reset reaction time tRR, the reset circuit is activated and a power down sequence of period tRD is initiated. The reset reaction time tRR avoids wrong triggering caused by short “glitches” on the VCC-line. < t RR VCC VRT < t RD typ. 4.65 V 1V Start-Up RO H L ON Delay Invalid t RD Power Start-Up ON Delay Started ON Delay Stopped Invalid Invalid t RR Normal t t t RD Failed N Failed Normal AET02950 Figure 4 Reset Function 4.2 Watchdog Operation The watchdog uses one hundred of the oscillator’s clock signal period as a timebase, defined as the watchdog cycle time tCYL. After power-on, the reset output signal at the RO pin (microcontroller reset) is kept LOW for the reset delay time tRD, i.e. 64 cycles. With the LOW to HIGH transition of the signal at RO the device starts the closed window time tCW = 32 cycles. A trigger signal within this window is interpreted as a pretrigger failure according to the figures shown below. After the closed window the open window with the duration tOW is started. The open window lasts at minimum until the trigger process has occurred, at maximum tOW is 32 cycles. A HIGH to LOW transition of the watchdog trigger signal on pin WDI is taken by a trigger. To avoid wrong triggering due to parasitic glitches two HIGH samples followed by two LOW samples (sample period tCYL) are decoded as a valid trigger. If a trigger signal appears at the watchdog input pin WDI during the open window or a power up/down occurs, the watchdog window signal is reset and a new closed window follows. A reset is generated (RO goes LOW) if there is no trigger pulse during the open window or if a pretrigger occurs during the closed window. This reset happens after 64 cycles after the latest valid closed window start time and lasts for further 64 cycles. The triggering is correct also, if the first three samples (two HIGH one LOW) of the trigger pulse at pin WDI are inside the closed window and only the fourth sample (the second LOW sample) is taken in the open window. In addition to the microcontroller reset signal RO the device generates a system enable signal at pin SEN. If RO Data Sheet 8 Rev. 3.4, 2007-08-16 TLE 6711 Circuit Description is HIGH the system enable goes active HIGH with the first valid watchdog trigger pulse at pin WDI. The SEN output goes LOW immediately if a pretrigger, a missing trigger or a power down reset occurs. TWD = 128*tCYL tSR = 64*tCYL tWDR = 64*tCYL tCW=32*tCYL tOW=32*tCYL definition closed window open window definition reset start delay time after window watchdog timeout fOSC=fOSCmax t EOW = end of open window tECW worst case reset duration time after window watchdog time-out Example with: t (CW+OW)min = ( tCW + tOW ) (1 - ∆) tCYL=1ms ∆=10% (oscillator deviation) fOSC=fOSCmin t CWmax = tCW (1+∆ ) t(CW+OW)min =(tCW+tOW)*(1-∆)= =(32+32)x0,9= 57,6ms t OWmin t WD Figure 5 tCWmax = tCW(1+∆)=32*1,1=35,2ms Window Watchdog Definitions 1 Closed window Open window Watchdog trigger signal WDI Valid WDI Indifferent WDI Not valid t ECW Data Sheet Closed window t EOW = Watchdog decoder sample point Figure 6 Open window AET02952 Window Watchdog Definitions 2 9 Rev. 3.4, 2007-08-16 TLE 6711 Circuit Description a) Perfect Triggering after Power on Reset VCC VRT t tRD = 64 Cycles RO t 32 Cycles WDWI CW OW CW OW CW CW t 32 Cycles WDI xx xx xx xx t1 SEN t2 System Failed xx xx t3 t System Enable System Failed t b) Incorrect Triggering tWDR = 64 Cycles tSR = 64 Cycles tSR = 64 Cycles RO t TWD = 128 Cycles WDWI CW OW CW CW OW CW OW OW t WDI 32 Cycles xx x xx x xx x xx 1) 2) xx x xx 3) 4) SEN t 1) Pretrigger 2) Incorrect trigger duration within watchdog open window OW: tHIGH < 2 Cycles 3) Incorrect trigger duration within watchdog open window OW: tLOW < 2 Cycles 4) Missing trigger Figure 7 Data Sheet t Legend: WDWI = Internal Watchdog Window OW = Open Window (trigger signal at WDI) CW = Closed Window (trigger signal at WDI) x = Sample Point AED02945 Window Watchdog Function 10 Rev. 3.4, 2007-08-16 TLE 6711 Circuit Description 4.3 Boost Converter The TLE 6711 G/GL contains a fully integrated boost converter (except the boost-diode), which provides a supply voltage for an energy reserve e.g. an airbag firing system. The regulated boost output voltage VBOOST is programmable by a divider network (external resistors) providing the feedback voltage for the boost feedback pin BOFB. The energy which is stored in the external electrolytic capacitor at VBOOST guarantees accurate airbag firing, even if the battery is disconnected by a car crash. The boost inductance LBO (typ. 100 µH) is PWM-switched by an integrated current limited power DMOS transistor with a programmable (external resistor RR) frequency. An internal bandgap reference provides a temperature independent, on chip trimmed reference voltage for the regulation loop. An error amplifier compares the reference voltage with the boost feedback signal VBOFB from the external divider network (determination of the output boost voltage VBOOST). Application note for programming the output voltage at pin VBOOST: ( R BO1 + R BO2 ) V BOOST = V BOFBTH × ------------------------------------R BO2 (1) With a PWM (Pulse Width Modulation) comparator the output of the error amplifier is compared to a periodic linear ramp, provided by a sawtooth signal of the oscillator connected to pin R. A logic signal with variable pulse width is generated. It passes through the logic circuits (sets the output latch PWM-FF) and driver circuits to the power switching DMOS. The Schmitt-trigger output resets the output flip-flop PWM-FF by NOR 2. The PWM signal is gated by the NAND 2 to guarantee a dominant reset. OV COMP L when NAND 3 OV at VBoost & + - = VthOV 38 V H when Tj > 175 ˚C or OV at VBoost L when Tj > 175 ˚C GND UV COMP VBoost + - VthUV 1 BOI Pin 14 Error-FF L when H when NOR 2 R & Q Error Error 1 R H when Overcurrent = 4V NOR 1 H when VBoost < 4 V Error Gate PWM-FF INV H= & Q OFF 1 Q = S PWM COMP Error-Ramp = + - Error-Signal + - H when Error-Signal < Error-Ramp GND Oscillator R Pin 1 Vmax Vmin Schmitt-trigger 1 Unlock Detector Ramp Vhigh tr tf tr Vlow t tr tf tr t OC COMP + - BOFB Pin 12 & & Error AMP 10 µA VREF NAND 2 Q S I Pullup 2.8 V & & Power D-MOS Gate Driver NAND1 GND H= ON VthOC 18 mV R Sense 14.5 m Ω BOGND Pin 13 OVL Boost Status Pin 11 Low if Battery Disconnected Clock GND H when Outputcurrent > 1.2 A AEB02946 Figure 8 Boost Converter Block Diagram Figure 8 shows the most important waveforms during operation; for low, medium and high loads up to overload condition. The output transistor is switched off immediately if the overcurrent comparator detects an overcurrent level at the power DMOS or if the sense output switches to low induced by a VBOOST undervoltage command. Data Sheet 11 Rev. 3.4, 2007-08-16 TLE 6711 Circuit Description The TLE 6711 G/GL is also protected against several boost loop errors: In case of a feedback interruption a pull-up current source (IFB typ. 0.4 µA), integrated at pin BOFB pulls the voltage at the feedback pin BOFB above the reference voltage. The boost output is switched off by the high error voltage which controls the PWM-Comparator at a zero duty cycle. In the case of a resistive loop error caused by leakage currents to ground, the boost output voltage would increase to very high values. In order to protect the VBOOST input as well as the external load against catastrophic failures, an overvoltage protection is provided which switches the output transistor off as soon as the voltage at pin VBOOST exceeds the internal fixed overvoltage threshold VBOOVOFF = typ. 37 V. Application Note A short circuit from VBOOST to ground will not destroy the IC, however, it may damage the external boost diode or the boost inductance if there is no overcurrent limitation in that path. VC and Error Voltage VError VCP VCV t OCLK H L PWM H L t I BOI I BOLI t I DBO t VBOI t VBOOST VS t Overcurrent Threshold Exceeded Load-Current Increasing with Time; Controlled by the Error Amp Controlled by the Overcurrent Comp AED02672 Figure 9 Data Sheet Most Important Waveforms of the Boost Converter Circuit 12 Rev. 3.4, 2007-08-16 TLE 6711 Circuit Description 4.3.1 Boost Status Output OVL For supervision of the Boost output voltage an open drain DMOS output is used. The output is high impedance in normal operation and low during the warning. The OVL goes LOW if the PWM comparator output (see Figure 8) remains HIGH for clock time period. This occurs when the Error-Signal falls below the minimum value of the Error-Ramp, this mean that Boost voltage falls below a certain threshold voltage. The OVL output used as a warning for insufficient Boost voltage. 4.4 Buck Converter A stabilized logic supply voltage (typ. 5 V) for general purpose is realized in the system by a buck converter. An external buck-inductance LBU is PWM switched by a high side DMOS power transistor with the programmed frequency (pin R). The buck regulator supply is given by the boost converter output VBOOST, in case of a battery power-down the stored energy of the boost converter capacitor is used. Like the boost converter, the buck converter uses the temperature compensated bandgap reference voltage (typ. 2.8 V) for its regulation loop. This reference voltage is connected to the non-inverting input of the error amplifier and an internal voltage divider supplies the inverting input. Therefore the output voltage VCC is fixed due to the internal resistor ratio to typ. 5.0 V. The output of the error amplifier goes to the inverting input of the PWM comparator as well as to the buck compensation output BUC. When the error amplifier output voltage exceeds the sawtooth voltage the output power MOS-transistor is switched on. So the duration of the output transistor conduction phase depends on the VCC level. A logic signal PWM with variable pulse width is generated. VCC OV COMP H when OV at VCC + UV COMP H when UV at VBoost + - VthUV 4V L when Overcurrent GND 200 Ω OC COMP VthOC 18 mV L when Overcurrent VCC Pin 7 = GND GND R Prot1 BUC Pin 6 = VthOV 1.2 V = - R VCC4 10.3kΩ + - R VCC3 39.7kΩ Boost Driver Supply VCC + - R VCC2 28kΩ PWM H when Error- COMP Error-Signal < Signal Error-Ramp ErrorRamp = VREF 2.8 V L when Tj > 175 ˚C GND GND R Error-FF R & R Pin 1 Figure 10 Data Sheet Vmax Vmin tr tf tr Schmitt-trigger 1 t Ramp Vhigh Vlow BDS Pin 10 & H= Q OFF 1 H= ON Power D-MOS Gate Driver NAND 2 Q INV & & S Q BUO Pin 8 & S tr tf tr PWM-FF 1 OFF when H Oscillator R Sense 18 mΩ NOR 1 Output Stage OFF when H + - Error AMP R VCC1 22kΩ VBoost Pin 9 t Q Clock AEB02947 Buck Converter Block Diagram 13 Rev. 3.4, 2007-08-16 TLE 6711 Circuit Description External loop compensation is required for converter stability, and is formed by connecting a compensation resistor-capacitor series-network (RBUC, CBUC) between pin BUC and GND. In the case of overload or short-circuit at VCC (the output current exceeds the buck overcurrent threshold IBUOC) the DMOS output transistor is switched off by the overcurrent comparator immediately. The pulse width is then controlled by the overcurrent comparator as seen before in the boost description. In order to protect the VCC input as well as the external load against catastrophic failures, an overvoltage protection is provided which switches the output transistor off as soon as the voltage at pin VCC exceeds the internal fixed overvoltage threshold VBUOVOFF = typ. 6.0 V. VC and Error Voltage VError VCP VCV t OCLK H L PWM H L t I BUO I BULI t I DBU t VBUO t VBOOST VCC5 t Overcurrent Threshold Exceeded Load-Current Increasing with Time; Controlled by the Error Amp Controlled by the Overcurrent Comp AED02673 Figure 11 Data Sheet Most Important Waveforms of the Buck Converter Circuit 14 Rev. 3.4, 2007-08-16 TLE 6711 Circuit Description 4.5 Electrical Characteristics Note: The listed characteristics are ensured over the operating range of the integrated circuit. Typical characteristics specify mean values expected over the production spread. If not otherwise specified, typical characteristics apply at TA = 25 °C and the given supply voltage. Electrical Characteristics: Current Consumption VCC = 4.75 V to 5.25 V; VBoost = 8 V to 35 V, Tj = -40 °C to +150 °C, RR = 47 kΩ; all voltages with respect to ground, positive current flowing into pin (unless otherwise specified) Pos. Parameter Symbol Limit Values Min. Typ. Max. Unit Conditions ICC = 0 mA; IBoLoad = 0 mA ICC = 200 mA; IBoLoad = 50 mA 4.5.1 Current consumption; see application circuit IBoost – 1.5 4 mA 4.5.2 Current consumption; see application circuit IBoost – 5 10 mA Electrical Characteristics: Under- and Over-Voltage Lockout at VBOOST VCC = 4.75 V to 5.25 V; VBoost = 8 V to 35 V, Tj = -40 °C to +150 °C, RR = 47 kΩ; all voltages with respect to ground, positive current flowing into pin (unless otherwise specified) Pos. Parameter Symbol Limit Values Min. Typ. Max. Unit Conditions 4.5.3 UV ON voltage; boost and buck conv. ON VBOUVON 4.0 4.5 5.0 V VBOOST increasing 4.5.4 UV OFF voltage; boost and buck conv. OFF VBOUVOFF 3.5 4.0 4.5 V VBOOST decreasing 4.5.5 UV Hysteresis voltage 0.2 0.5 1.0 V HY = ON - OFF 34 37 40 V 30 33 36 V VBOOST increasing VBOOST decreasing 1.5 4 10 V HY = OFF - ON 4.5.6 4.5.7 4.5.8 VBOUVHY OV OFF voltage; boost conv. OFF VBOOVOFF OV ON voltage; boost conv. ON VBOOVON OV Hysteresis voltage VBOUVHY Electrical Characteristics: Over-Voltage Lockout at VCC VCC = 4.75 V to 5.25 V; VBoost = 8 V to 35 V, Tj = -40 °C to +150 °C, RR = 47 kΩ; all voltages with respect to ground, positive current flowing into pin (unless otherwise specified) Pos. Parameter Symbol Limit Values Min. 4.5.9 OV OFF voltage; buck conv. OFF 4.5.10 OV ON voltage; buck conv. ON 4.5.11 OV Hysteresis voltage Data Sheet VBUOVOFF 5.5 VBUOVON 5.25 VBUOVHY 0.10 15 Unit Conditions Typ. Max. 6.0 6.5 V 5.75 6.25 V VCC increasing VCC decreasing 0.25 0.50 V HY = OFF - ON Rev. 3.4, 2007-08-16 TLE 6711 Circuit Description Electrical Characteristics: Boost-Converter; BOI, BOFB and VBOOST VCC = 4.75 V to 5.25 V; VBoost = 8 V to 35 V, Tj = -40 °C to +150 °C, RR = 47 kΩ; all voltages with respect to ground, positive current flowing into pin (unless otherwise specified) Pos. Parameter Symbol Limit Values Unit Conditions Min. Typ. Max. 4.5.12 Boost voltage; see application circuit VBOOST 24.0 27.5 31.0 V 5 mA < IBOOST < 100 mA; Tj = 25 °C; 8 V < VBatt < 16 V 4.5.13 Boost Voltage; see application circuit VBOOST 23 – 32 V 5 mA < IBOOST < 100 mA; 8 V < VBatt < 16 V 4.5.14 Efficiency; see. appl. circuit η – 80 – % RBOON – 0.6 0.75 Ω – – 1.4 Ω 1.0 1.3 1.8 A – Feedback threshold voltage RBOON IBOOC VBOFBTH IBOOST = 100 mA Tj = 25 °C; IBOI = 1 A IBOI = 1 A 4.5.15 Power-Stage ON resistance 4.5.16 Power-Stage ON resistance 4.5.17 Boost overcurrent threshold 4.5.18 2.55 2.7 2.85 V Feedback input current IFB -2 -0.4 0 µA VBOI = 12 V; IBOOST = 25 mA 2 V < VBOFB < 4 V 4.5.19 Electrical Characteristics: Buck-Converter; BUO, BDS, BUC and VCC VCC = 4.75 V to 5.25 V; VBoost = 8 V to 35 V, Tj = -40 °C to +150 °C, RR = 47 kΩ; all voltages with respect to ground, positive current flowing into pin (unless otherwise specified) Pos. Parameter Symbol Min. Typ. Max. 4.5.20 Logic supply voltage VCC 4.9 – 4.5.21 Efficiency; see. appl. circuit η – 4.5.22 Power-Stage ON resistance RBUON 4.5.23 Power-Stage ON resistance 4.5.24 Buck overcurrent threshold 4.5.25 Input current on pin VCC 4.5.26 Buck Gate supply voltage; VBGS = VBDS - VBOOST RBUON IBUOC ICC VBGS Data Sheet Limit Values Unit Conditions 5.1 V 1 mA < ICC < 250 mA; see. appl. circuit 85 – % – 0.38 0.5 Ω – – 1.0 Ω ICC = 250 mA; VBoost = 25 V Tj = 25 °C; IBUO = 1 A IBUO = 1 A 0.7 0.95 1.2 A – – 0.2 0.5 mA VCC = 5 V 5 – 10 V – 16 Rev. 3.4, 2007-08-16 TLE 6711 Circuit Description Electrical Characteristics: Reference Input; R (Oscillator; Timebase for Boost- and Buck-Converter, Reset and Watchdog) VCC = 4.75 V to 5.25 V; VBoost = 8 V to 35 V, Tj = -40 °C to +150 °C, RR = 47 kΩ; all voltages with respect to ground, positive current flowing into pin (unless otherwise specified) Pos. 4.5.27 4.5.28 4.5.29 4.5.30 Parameter Symbol Limit Values VR Oscillator frequency fOSC Oscillator frequency fOSC Cycle time for watchdog and reset tCYL Voltage on pin R Unit Conditions Min. Typ. Max. 1.3 1.4 1.5 V – 85 95 105 kHz Tj = 25 °C 75 – 115 kHz – – 1.05 – ms tCYL = 100/fOSC timing Electrical Characteristics: Reset Generator; RO VCC = 4.75 V to 5.25 V; VBoost = 8 V to 35 V, Tj = -40 °C to +150 °C, RR = 47 kΩ; all voltages with respect to ground, positive current flowing into pin (unless otherwise specified) Pos. Parameter Symbol Limit Values Min. Typ. Max. Unit Conditions 4.5.31 Reset threshold; VCC decreasing/increasing VRT 4.50 4.65 4.75 V VRO H to L or L to H transition; VRO remains low down to VCC > 1 V 4.5.32 Reset low voltage VROL – 0.2 0.4 V 4.5.33 Reset low voltage VROL – 0.2 0.4 V 4.5.34 Reset high voltage VROH VCC - – VCC + V IROL = 2 mA; 2.5 V < VCC < VRT IROL = 0.2 mA; 1 V < VCC < VRT IROH = 0 mA 0.1 4.5.35 Reset pull-up current 4.5.36 Reset Reaction time 4.5.37 Power-up reset delay time IRO tRR tRD 0.1 – 240 – µA 0 V < VRO < 4 V 50 100 150 µs – 64 – tCYL VCC < VRT VCC ≥ 4.8 V Electrical Characteristics: Watchdog Generator; WDI VCC = 4.75 V to 5.25 V; VBoost = 8 V to 35 V, Tj = -40 °C to +150 °C, RR = 47 kΩ; all voltages with respect to ground, positive current flowing into pin (unless otherwise specified) Pos. 4.5.38 4.5.39 Parameter H-input voltage threshold L-input voltage threshold 4.5.40 Watchdog period 4.5.41 Start of reset; after watchdog time-out Data Sheet Symbol Limit Values Min. Typ. Max. VWDIH – – 0.7 × VWDIL 0.3 × TWD tSR Unit Conditions V – VCC – – V – – 128 – – 64 – tCYL tCYL VCC ≥ 4.8 V VCC ≥ 4.8 V VCC 17 Rev. 3.4, 2007-08-16 TLE 6711 Circuit Description Electrical Characteristics: Watchdog Generator; WDI (cont’d) VCC = 4.75 V to 5.25 V; VBoost = 8 V to 35 V, Tj = -40 °C to +150 °C, RR = 47 kΩ; all voltages with respect to ground, positive current flowing into pin (unless otherwise specified) Pos. Parameter Symbol Limit Values Min. Typ. Max. Unit Conditions 4.5.42 Reset duration; after watchdog time-out tWDR – 64 – tCYL VCC ≥ 4.8 V 4.5.43 Open window time – 32 – 4.5.44 Closed window time – 32 – 4.5.45 Window watchdog trigger time tOW tCW tWD – 46.4 – tCYL tCYL tCYL VCC ≥ 4.8 V VCC ≥ 4.8 V VCC ≥ 4.8 V Electrical Characteristics: System Enable Output; SEN VCC = 4.75 V to 5.25 V; VBoost = 8 V to 35 V, Tj = -40 °C to +150 °C, RR = 47 kΩ; all voltages with respect to ground, positive current flowing into pin (unless otherwise specified) Pos. Parameter Symbol Limit Values Min. Typ. Max. Unit Conditions 4.5.46 Enable low voltage VSENL – 0.2 0.4 V 4.5.47 Enable low voltage VSENL – 0.2 0.4 V 4.5.48 Enable high voltage VSENH VCC - – VCC + V ISENL = 2 mA; 2.5 V < VCC < VRT ISENL = 0.2 mA; 1 V < VCC < VRT ISENH = 0 mA µA 0 V < VSEN < 4 V 0.1 4.5.49 Enable pull-up current ISEN – 0.1 240 – Electrical Characteristics: Boost Status Output; OVL VCC = 4.75 V to 5.25 V; VBoost = 8 V to 35 V, Tj = -40 °C to +150 °C, RR = 47 kΩ; all voltages with respect to ground, positive current flowing into pin (unless otherwise specified) Pos. Parameter Symbol Limit Values Min. Typ. Max. Unit Conditions 4.5.50 Enable low voltage VOVLL – 0.2 0.4 V IOVLL = 1 mA; 2.5 V < VCC < VRT 4.5.51 Boost feedback threshold voltage VOVLTH 2.3 2.45 2.6 V See application circuit Electrical Characteristics: Thermal Shutdown (Boost and Buck-Converter OFF) VCC = 4.75 V to 5.25 V; VBoost = 8 V to 35 V, Tj = -40 °C to +150 °C, RR = 47 kΩ; all voltages with respect to ground, positive current flowing into pin (unless otherwise specified) Pos. Parameter Symbol Limit Values Min. Typ. Max. Unit Conditions 4.5.52 Thermal shutdown junction temperature TjSD 150 175 200 °C – 4.5.53 Thermal switch-on junction temperature TjSO 120 – 170 °C – 4.5.54 Temperature hysteresis ∆T – 30 – K – Data Sheet 18 Rev. 3.4, 2007-08-16 TLE 6711 Application Information 5 Application Information Note: The following information is given as a hint for the implementation of the device only and shall not be regarded as a description or warranty of a certain functionality, condition or quality of the device. Figure 12 shows the application circuit of the TLE 6711 G/GL with the suggested external parts. D1 L BO D2 CL VBatt ZD1 36 V 10 µF DBO 100 µH I BOLoad CS 220 nF R BO1 CBO1 100 k Ω CBO1 CBO2 4700 µF 220 nF 10 nF BOFB 12 TLE 6711 G R BO2 Boost Converter Biasing 10 k Ω 14 BOI VBOOST 13 BOGND CBOT VBoost 10 BDS 10 nF VREF 9 VBOOST BUC 6 R BUC 47 k Ω CBUC 470 nF 8 BUO 7 VCC 220 µH DBU CBU1 CBU2 100 µF 220 nF 47 k Ω System Enable Output Watchdog Trigger Input Reference Current Generator and Oscillator Reset Window Watchdog and System Enable 3 WDI 10 k Ω 2 RO Reset Output Boost Status Output 11 OVL 4 GND Figure 12 Data Sheet VCC VInternal 5 SEN R 1 RR L BU Buck Converter Device Type Supplier Remarks D1 BAW78C Infineon 200 V; 1 A; SOT-89 D2 BAW78C Infineon 200 V; 1 A; SOT-89 D BO BAW78B Infineon 100 V; 1 A; SOT-89 D BO SS14 multiple Schottky; 40 V; 1 A D BU - - L BO B82442-A1104 EPCOS 100 µH; 0.25 A; 1.28 Ω L BO L BU Do3316P-104 Coilcraft 100 µH; 1.2 A; 0.28 Ω L BU Do3316P-224 Coilcraft 220 µH; 0.8 A; 0.61 Ω Schottky; 100 V; 1 A B82442-H1224 EPCOS 220 µH; 0.24 A; 2.72 Ω AEB02948 Application Circuit (pinning valid for PG-DSO-14-1) 19 Rev. 3.4, 2007-08-16 TLE 6711 Diagrams: Oscillator and Boost/Buck-Converter Performance 6 Diagrams: Oscillator and Boost/Buck-Converter Performance In the following the behaviour of the Boost/Buck-converter and the oscillator is shown. Oscillator Frequency Deviation vs. Junction Temperature Boost Feedback Current vs. Junction Temperature AED02938 10 kHz ∆f OSC 5 I FB Referred to f OSC at Tj = 25 ˚C -300 0 -400 -5 -500 -10 -600 -15 -50 -25 0 AED02939 -200 nA -700 -50 -25 0 25 50 75 100 ˚C 150 25 50 75 100 ˚C 150 Tj Tj Current Consumption vs. Junction Temperature Efficiency Buck vs. Load AED02940 3 mA η I Boost 2.5 2 85 RT, HT Boost ON Buck ON I BO boost = 0 mA I CC = 0 mA 75 1 70 65 25 50 75 100 ˚C 150 Tj Data Sheet CT 80 1.5 0.5 -50 -25 0 AED02942 90 % 50 150 mA 250 I LOAD 20 Rev. 3.4, 2007-08-16 TLE 6711 Diagrams: Oscillator and Boost/Buck-Converter Performance Efficiency Buck vs. Boost Voltage Oscillator Frequency vs. Resistor from R to GND AED02941 95 AED02982 1000 kHz η % fOSC 90 500 VCC = 5 V 85 200 @ Tj = 25 ˚C I Load = 120 mA 80 80 mA 75 50 70 65 100 20 40 mA 5 15 25 10 V 30 5 10 20 50 100 200 VBoost Efficiency Boost vs. Input Voltage η Boost Output Voltage vs. Load AED02943 95 % kΩ 1000 RR AED02944 31 V I Boost = 60 mA VBoost 30 90 HT 85 CT RT 80 28 75 27 70 8 10 12 14 26 V 16 VBatt Data Sheet RT HT CT 29 20 40 60 80 mA 100 I LOAD 21 Rev. 3.4, 2007-08-16 TLE 6711 Diagrams: Oscillator and Boost/Buck-Converter Performance Boost and Logic Output Voltage vs. Junction Temperature AED02983 30 V 29 VBoost 28 Boost and Buck Overcurrent Threshold vs. Junction Temperature I OC AED02985 1.4 A 1.3 I Boost = 50 mA I BOOC (Boost-Converter) 27 1.2 26 1.1 V VCC 1 5.025 5.000 I BUOC (Buck-Converter) I CC = 250 mA 0.9 4.975 4.950 -50 -25 0 25 50 75 100 0.8 -50 -25 0 ˚C 150 Tj 25 50 75 100 ˚C 150 Tj Boost and Buck ON Resistance vs. Junction Temperature AED02984 1000 mΩ R ON 800 R BOON @ I BOI = 1 A 700 600 500 400 R BUON @ I BUO = 1 A 300 200 100 0 -50 -25 0 25 50 75 100 ˚C 150 Tj Data Sheet 22 Rev. 3.4, 2007-08-16 TLE 6711 Package Outlines 7 Package Outlines 1.75 MAX. C 1) 4 -0.2 B 1.27 0.64 ±0.25 0.1 2) 0.41+0.10 -0.06 6±0.2 0.2 M A B 14x 14 8˚MAX. 0.19 +0.06 0.175 ±0.07 (1.47) 0.35 x 45˚ 0.2 M C 8 1 7 1) 8.75 -0.2 A Index Marking 1) Does not include plastic or metal protrusion of 0.15 max. per side 2) Lead width can be 0.61 max. in dambar area GPS01230 2.65 MAX. 0.35 x 45˚ 1.27 0.35 +0.15 0.1 20x 2) 0.2 20x 20 1 0.4 +0.8 0.23 +0.09 7.6 -0.2 1) 8˚ MAX. 2.45 -0.2 PG-DSO-14-1 (Plastic Dual Small Outline Package) 0.2 -0.1 Figure 13 Dimensions in mm 10.3 ±0.3 11 10 12.8 -0.2 1) Index Marking 1) Does not include plastic or metal protrusion of 0.15 max. per side 2) Does not include dambar protrusion of 0.05 max. per side Figure 14 GPS05094 Dimensions in mm PG-DSO-20-36 (Plastic Dual Small Outline Package) Green Product (RoHS compliant) To meet the world-wide customer requirements for environmentally friendly products and to be compliant with government regulations the device is available as a green product. Green products are RoHS-Compliant (i.e Pb-free finish on leads and suitable for Pb-free soldering according to IPC/JEDEC J-STD-020). Data Sheet 23 Rev. 3.4, 2007-08-16 TLE 6711 Revision History 8 Revision History Revision Date Changes 3.4 2007-08-16 Initial version of RoHS-compliant derivate of TLE 6711. Page 2: AEC certified statement added. Page 2 and Page 23: RoHS compliance statement and Green product feature added. Page 2 and Page 23: Packages changed to RoHS compliant version. Disclaimer updated. 3.3 2006-03-16 Page 9: Figure 5 corrected, TWD = 128 tCYL. Page 19: Figure 12 corrected, Inductor type EPCOS B82442-H1224. Data Sheet 24 Rev. 3.4, 2007-08-16 Edition 2007-08-16 Published by Infineon Technologies AG 81726 Munich, Germany © 2007 Infineon Technologies AG All Rights Reserved. Legal Disclaimer The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics. With respect to any examples or hints given herein, any typical values stated herein and/or any information regarding the application of the device, Infineon Technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation, warranties of non-infringement of intellectual property rights of any third party. Information For further information on technology, delivery terms and conditions and prices, please contact the nearest Infineon Technologies Office (www.infineon.com). Warnings Due to technical requirements, components may contain dangerous substances. For information on the types in question, please contact the nearest Infineon Technologies Office. Infineon Technologies components may be used in life-support devices or systems only with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered.