TLE6711

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 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). P/PG-DSO-20 -1, -6, -7, -9, -14, -15, -17, -18 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 TLE 6711 G TLE 6711 GL Data Sheet 2 Package PG-DSO-14-1 PG-DSO-20-36 Rev. 3.4, 2007-08-16 TLE 6711 Block Diagram 1 Block Diagram TLE 6711 G BOFB 12 14 Boost Converter BOI BOGND BDS 13 10 Biasing VBoost VREF 9 BUC 6 Buck Converter VBOOST BUO 8 7 VInternal 5 Reference Current Generator and Oscillator Reset, Window Watchdog and System Enable VCC SEN 3 R 1 WDI 2 RO 11 4 GND OVL AEB02949 Figure 1 Block Diagram (pinning valid for PG-DSO-14-1) Data Sheet 3 Rev. 3.4, 2007-08-16 TLE 6711 Pin Configuration 2 2.1 Pin Configuration Pin Assignment R RO WDI GND SEN BUC VCC 1 2 3 4 5 6 7 14 13 12 11 10 9 8 AEP02960 BOI BOGND BOFB OVL BDS VBoost BUO Figure 2 Pin Configuration PG-DSO-14-1 (top view) R RO WDI GND GND GND GND SEN BUC 1 2 3 4 5 6 7 8 9 20 BOI 19 BOFB 18 OVL 17 GND 16 GND 15 GND 14 GND 13 BDS 12 VBOOST 11 BUO VCC 10 Figure 3 Pin Configuration PG-DSO-20-36 (top view) Data Sheet 4 Rev. 3.4, 2007-08-16 TLE 6711 Pin Configuration 2.2 Pin SO-14 1 2 3 4 Pin Definitions and Functions Pin SO-20 1 2 3 Symbol R RO WDI Function Reference Input; an external resistor from this pin to GND determines the reference current and the oscillator frequency Reset Output; open drain output from reset comparator with an internal pull-up resistor Watchdog Input; input for the watchdog control signal from the controller Ground; analog signal ground 4, 5, 6, 7, GND 14, 15, 16, 17 8 9 10 11 12 13 18 19 – 20 SEN BUC 5 6 7 8 9 10 11 12 13 14 System Enable Output; open drain output from Watchdog fail-circuit with an internal pull-up resistor Buck-Converter Compensation Input; output of internal error amplifier; for loop-compensation connect an external R-C-series combination to GND Supply Voltage Output; buck converter output; external blocking capacitor necessary Buck Converter Output; source of the integrated power-DMOS Boost Converter Input; input supply voltage of the IC; coming from the boost converter output voltage; buck converter input voltage Buck Driver Supply Input; voltage to drive the buck converter powerstage Boost Status Output; open drain output from boost PWM comparator Boost Converter Feedback Input; connect boost voltage divider to this pin; internal reference is the boost feedback threshold VBOFBTH Boost-Ground; power signal ground; source of boost converter power-DMOS Boost Converter Input; drain of the integrated buck converter power-DMOS VCC BUO VBOOST BDS OVL BOFB BOGND BOI Data Sheet 5 Rev. 3.4, 2007-08-16 TLE 6711 General Product Characteristics 3 3.1 General Product Characteristics 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. Voltages 3.1.1 3.1.2 3.1.3 3.1.4 3.1.5 3.1.6 3.1.7 3.1.8 3.1.9 3.1.10 3.1.11 3.1.12 3.1.13 3.1.14 3.1.15 3.1.16 Buck compensation input voltage Logic supply voltage Reset output voltage System Enable output voltage Current reference voltage Watchdog input voltage OVL output voltage Junction Temperature Storage Temperature All pins to GND Boost input voltage Boost output voltage Boost feedback voltage Buck output voltage Buck driver supply voltage Parameter Symbol Min. Limit Values Max. 46 46 46 46 48 47 6.8 6.8 6.8 6.8 6.8 6.8 6.8 150 150 2 V V V V V V V V V V V V V °C °C kV – – – – 0 °C < Tj ≤ 150 °C -40 °C ≤ Tj ≤ 0 °C – – – – – – – – – Human Body Model; R = 1.5 kΩ; C = 100 pF Unit Conditions VBOI VBOOST VBOFB VBUO VBDS VBUC VCC VRO VSEN VR VWDI VOVL Tj Tstg VHBM -0.3 -0.3 -0.3 -1 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -40 -50 -2 Temperatures ESD Susceptibility 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. 3.2.1 3.2.2 3.2.3 3.2.4 3.2.5 3.2.6 3.2.7 3.2.8 3.2.9 3.2.10 3.2.11 3.2.12 3.2.13 3.2.14 3.2.15 3.2.16 3.2.17 Operating Range Parameter Boost input voltage Boost input voltage; (normal operation) Boost input voltage; (normal operation) Boost input voltage Boost feedback voltage Buck output voltage Buck driver supply voltage Buck compensation input voltage Logic supply voltage Reset output voltage System Enable output voltage Watchdog input voltage Current reference voltage Junction temperature Junction ambient PG-DSO-14-1 Junction ambient PG-DSO-20-36 Symbol Min. Limit Values Max. 40 35 36 4.5 3.0 40 48 47 3.0 6.25 V V V V V V V V V V V V V V °C K/W K/W – -0.3 5 4.5 -0.3 0 -0.6 -0.3 0 4.00 -0.3 -0.3 0 0 -40 – – Unit Conditions VBOI VBOOST VBOOST VBOOST VBOFB VBUO VBDS VBUC VCC VRO VSEN VWDI VR Tj Rthj-a Rthj-a VBOOST increasing VBOOST decreasing Boost- and BuckConverter OFF – – 0 °C < Tj ≤ 150 °C -40 °C ≤ Tj ≤ 0 °C – – – – – – – – – VCC + 0.3 VCC + 0.3 VCC + 0.3 3.0 150 120 65 Thermal Resistance 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 4.1 Circuit Description Power On Reset Below some important sections of the TLE 6711 G/GL are described in more detail. 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. VCC typ. 4.65 V 1V Start-Up RO H L Power ON Delay < t RR < t RD VRT ON Delay Started Invalid ON Delay Stopped Invalid t Invalid t RD Start-Up Normal t RR Failed N Failed t RD Normal t 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 tCW=32*tCYL definition closed window tWDR = 64*tCYL tOW=32*tCYL open window definition reset start delay time after window watchdog timeout reset duration time after window watchdog time-out worst case fOSC=fOSCmax tECW t EOW = end of open window t (CW+OW)min = ( tCW + tOW ) (1 - ∆) Example with: tCYL=1ms ∆=10% (oscillator deviation) t(CW+OW)min =(tCW+tOW)*(1-∆)= =(32+32)x0,9= 57,6ms tCWmax = tCW(1+∆)=32*1,1=35,2ms fOSC=fOSCmin t CWmax = tCW (1+∆ ) t OWmin t WD Figure 5 Window Watchdog Definitions 1 Closed window Open window Watchdog trigger signal Open window Closed window WDI Valid Indifferent Not valid t ECW t EOW AET02952 WDI WDI = Watchdog decoder sample point Figure 6 Window Watchdog Definitions 2 Data Sheet 9 Rev. 3.4, 2007-08-16 TLE 6711 Circuit Description a) Perfect Triggering after Power on Reset VCC VRT tRD = 64 Cycles RO t 32 Cycles WDWI CW OW CW OW CW 32 Cycles WDI xx xx SEN System Failed b) Incorrect Triggering tWDR = 64 Cycles xx xx xx xx CW t t t1 t2 t3 t System Failed System Enable t tSR = 64 Cycles RO tSR = 64 Cycles TWD = 128 Cycles WDWI CW OW CW OW CW OW CW OW t t WDI 32 Cycles xx 1) x 2) xx x x 3) xx xx 4) xx x xx SEN t 1) Pretrigger 2) t Legend: WDWI = Internal Watchdog Window OW = Open Window (trigger signal at WDI) CW = Closed Window (trigger signal at WDI) x = Sample Point AED02945 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 Window Watchdog Function Data Sheet 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 GND UV COMP + + - L when Tj > 175 ˚C H when Tj > 175 ˚C or OV at VBoost Error Gate Error-FF L when H when NOR 2 R&Q Error Error 1 PWM-FF INV H= & Q OFF 1 H= ON Gate Driver & S Q OC COMP + - VBoost VthUV 4V H when VBoost < 4 V H when Overcurrent NOR 1 1 BOI Pin 14 R = Power D-MOS NAND1 & S Error AMP + - GND & Q NAND 2 & I Pullup 10 µA BOFB Pin 12 PWM COMP + - VthOC 18 mV = Error-Signal Error-Ramp VREF 2.8 V = H when Error-Signal < Error-Ramp 14.5 m Ω BOGND Pin 13 R Sense GND Oscillator R Pin 1 Schmitt-trigger 1 Ramp Vhigh Unlock Detector Vmax Vmin OVL Boost Status Pin 11 Low if Battery Disconnected tr tf tr Vlow t tr tf tr t 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. and VC Error Voltage VError VCP VCV OCLK H L PWM H L t t t I BOI I BOLI I DBO t VBOI VBOOST VS t t Overcurrent Threshold Exceeded Load-Current Increasing with Time; Controlled by the Error Amp Controlled by the Overcurrent Comp AED02672 Figure 9 Most Important Waveforms of the Boost Converter Circuit Data Sheet 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 39.7kΩ R VCC3 - R VCC4 10.3kΩ BUC Pin 6 = = VthOV 1.2 V R Prot1 200 Ω VCC Pin 7 L when Overcurrent Error AMP + - VCC R VCC1 22kΩ R VCC2 28kΩ PWM H when Error- COMP Error-Signal < Signal Error-Ramp ErrorRamp + - NOR 1 Output Stage OFF when H 1 R PWM-FF & H= Q OFF INV 1 H= ON Gate Driver & S Q BUO Pin 8 Power D-MOS = VREF 2.8 V GND GND L when Tj > 175 ˚C Error-FF R & Q OFF when H NAND 2 & Oscillator R Pin 1 Schmitt-trigger 1 & S Q Vmax Vmin tr tf tr t Ramp Vhigh Vlow tr tf tr t Clock AEB02947 Figure 10 Buck Converter Block Diagram Data Sheet 13 + - GND GND + - OV COMP H when OV at VCC + UV COMP H when UV at VBoost = VthUV 4V L when Overcurrent VBoost Pin 9 18 mΩ OC COMP VthOC 18 mV R Sense GND Boost Driver Supply BDS Pin 10 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. and VC Error Voltage VError VCP VCV OCLK H L PWM H L t t t I BUO I BULI I DBU t VBUO VBOOST t VCC5 t Overcurrent Threshold Exceeded Load-Current Increasing with Time; Controlled by the Error Amp Controlled by the Overcurrent Comp AED02673 Figure 11 Most Important Waveforms of the Buck Converter Circuit Data Sheet 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. 4.5.1 4.5.2 Parameter Current consumption; see application circuit Current consumption; see application circuit Symbol Min. Limit Values Typ. 1.5 5 Max. 4 10 mA mA – – Unit Conditions IBoost IBoost ICC = 0 mA; IBoLoad = 0 mA ICC = 200 mA; IBoLoad = 50 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. 4.5.3 4.5.4 4.5.5 4.5.6 4.5.7 4.5.8 Parameter UV ON voltage; boost and buck conv. ON UV OFF voltage; boost and buck conv. OFF UV Hysteresis voltage Symbol Min. Limit Values Typ. 4.5 4.0 0.5 37 33 4 Max. 5.0 4.5 1.0 40 36 10 V V V V V V 4.0 Unit Conditions VBOUVON VBOOST increasing VBOOST decreasing HY = ON - OFF VBOUVOFF 3.5 0.2 34 30 1.5 VBOUVHY OV OFF voltage; boost conv. OFF VBOOVOFF OV ON voltage; boost conv. ON VBOOVON OV Hysteresis voltage VBOUVHY VBOOST increasing VBOOST decreasing HY = OFF - ON 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. 4.5.9 4.5.10 4.5.11 Parameter OV OFF voltage; buck conv. OFF OV ON voltage; buck conv. ON OV Hysteresis voltage Symbol Min. Limit Values Typ. 6.0 5.75 0.25 Max. 6.5 6.25 0.50 V V V Unit Conditions VBUOVOFF 5.5 VBUOVON 5.25 VBUOVHY 0.10 VCC increasing VCC decreasing HY = OFF - ON Data Sheet 15 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. 4.5.12 Parameter Boost voltage; see application circuit Boost Voltage; see application circuit Efficiency; see. appl. circuit Power-Stage ON resistance Power-Stage ON resistance Boost overcurrent threshold Feedback threshold voltage Feedback input current Symbol Min. Limit Values Typ. 27.5 Max. 31.0 V 5 mA < IBOOST < 100 mA; Tj = 25 °C; 8 V < VBatt < 16 V 5 mA < IBOOST < 100 mA; 8 V < VBatt < 16 V 24.0 Unit Conditions VBOOST 4.5.13 VBOOST 23 – 32 V 4.5.14 4.5.15 4.5.16 4.5.17 4.5.18 4.5.19 η – – – 1.0 2.55 -2 80 0.6 – 1.3 2.7 -0.4 – 0.75 1.4 1.8 2.85 0 % Ω Ω A V µA RBOON RBOON IBOOC VBOFBTH IFB IBOOST = 100 mA Tj = 25 °C; IBOI = 1 A IBOI = 1 A – VBOI = 12 V; IBOOST = 25 mA 2 V < VBOFB < 4 V 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. 4.5.20 Parameter Logic supply voltage Symbol Min. Limit Values Typ. – Max. 5.1 V 1 mA < ICC < 250 mA; see. appl. circuit 4.9 Unit Conditions VCC 4.5.21 4.5.22 4.5.23 4.5.24 4.5.25 4.5.26 Efficiency; see. appl. circuit Power-Stage ON resistance Power-Stage ON resistance Buck overcurrent threshold Input current on pin VCC Buck Gate supply voltage; VBGS = VBDS - VBOOST η – – – 0.7 – 5 85 0.38 – 0.95 0.2 – – 0.5 1.0 1.2 0.5 10 % Ω Ω A mA V RBUON RBUON IBUOC ICC VBGS ICC = 250 mA; VBoost = 25 V Tj = 25 °C; IBUO = 1 A IBUO = 1 A – VCC = 5 V – Data Sheet 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 Voltage on pin R Symbol Min. 1.3 85 75 – Limit Values Typ. 1.4 95 – 1.05 Max. 1.5 105 115 – V kHz kHz ms – Unit Conditions VR Oscillator frequency fOSC Oscillator frequency fOSC Cycle time for watchdog and reset tCYL timing T j = 25 ° C – tCYL = 100/fOSC 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. 4.5.31 Parameter Reset threshold; VCC decreasing/increasing Symbol Min. Limit Values Typ. 4.65 Max. 4.75 V 4.50 Unit Conditions VRT VRO H to L or L to H transition; VRO remains low down to VCC > 1 V IROL = 2 mA; 2.5 V < VCC < VRT IROL = 0.2 mA; 1 V < VCC < VRT IROH = 0 mA 0 V < VRO < 4 V 4.5.32 4.5.33 4.5.34 4.5.35 4.5.36 4.5.37 Reset low voltage Reset low voltage Reset high voltage Reset pull-up current Reset Reaction time Power-up reset delay time VROL VROL VROH IRO tRR tRD – – 0.2 0.2 – 240 100 64 0.4 0.4 V V V µA µs VCC 0.1 – 50 – VCC + 0.1 – 150 – 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 4.5.40 4.5.41 Parameter H-input voltage threshold L-input voltage threshold Watchdog period Start of reset; after watchdog time-out Symbol Min. Limit Values Typ. – – 128 64 Max. 0.7 × V V – – – 0.3 × Unit Conditions VWDIH VWDIL TWD tSR VCC – – – VCC – – tCYL tCYL VCC ≥ 4.8 V VCC ≥ 4.8 V Data Sheet 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. 4.5.42 4.5.43 4.5.44 4.5.45 Parameter Reset duration; after watchdog time-out Open window time Closed window time Window watchdog trigger time Symbol Min. Limit Values Typ. 64 32 32 46.4 Max. – – – – – – – – Unit Conditions tWDR tOW tCW tWD tCYL tCYL tCYL tCYL VCC ≥ 4.8 V 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. 4.5.46 4.5.47 4.5.48 4.5.49 Parameter Enable low voltage Enable low voltage Enable high voltage Enable pull-up current Symbol Min. Limit Values Typ. 0.2 0.2 – 240 Max. 0.4 0.4 V V V µA – – Unit Conditions VSENL VSENL VSENH ISEN VCC 0.1 – VCC + 0.1 – ISENL = 2 mA; 2.5 V < VCC < VRT ISENL = 0.2 mA; 1 V < VCC < VRT ISENH = 0 mA 0 V < VSEN < 4 V 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. 4.5.50 4.5.51 Parameter Enable low voltage Boost feedback threshold voltage Symbol Min. Limit Values Typ. 0.2 2.45 Max. 0.4 2.6 V V – 2.3 Unit Conditions VOVLL VOVLTH IOVLL = 1 mA; 2.5 V < VCC < VRT 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. 4.5.52 4.5.53 4.5.54 Parameter Thermal shutdown junction temperature Thermal switch-on junction temperature Temperature hysteresis Symbol Min. Limit Values Typ. 175 – 30 Max. 200 170 – °C °C K – – – 150 120 – Unit Conditions TjSD TjSO ∆T 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 D2 L BO 100 µH DBO I BOLoad VBatt CL 10 µF ZD1 36 V CS 220 nF CBO1 10 nF TLE 6711 G BOFB 12 Boost Converter 100 k Ω CBO1 CBO2 4700 µF 220 nF 10 k Ω R BO1 R BO2 VBOOST 14 BOI 13 BOGND Biasing VBoost CBOT 10 BDS 10 nF 9 VBOOST VREF BUC 6 Buck Converter L BU 8 BUO 7 VCC 220 µH DBU R BUC 47 k Ω CBUC 470 nF CBU1 100 µF CBU2 220 nF VCC System Enable Output Watchdog Trigger Input VInternal 5 SEN Reference Current Generator and Oscillator Reset Window Watchdog and System Enable 3 WDI 10 k Ω R1 2 RO 47 k Ω RR Reset Output Boost Status Output 11 OVL 4 GND Device Type D1 D2 D BO D BO D BU L BO L BO L BU L BU BAW78C BAW78C BAW78B SS14 - Supplier Remarks Infineon 200 V; 1 A; SOT-89 Infineon 200 V; 1 A; SOT-89 Infineon 100 V; 1 A; SOT-89 multiple Schottky; 40 V; 1 A Schottky; 100 V; 1 A B82442-A1104 EPCOS 100 µH; 0.25 A; 1.28 Ω Do3316P-104 Coilcraft 100 µH; 1.2 A; 0.28 Ω B82442-H1224 EPCOS 220 µH; 0.24 A; 2.72 Ω Do3316P-224 Coilcraft 220 µH; 0.8 A; 0.61 Ω AEB02948 Figure 12 Application Circuit (pinning valid for PG-DSO-14-1) Data Sheet 19 Rev. 3.4, 2007-08-16 TLE 6711 Diagrams: Oscillator and Boost/Buck-Converter Performance 6 Diagrams: Oscillator and Boost/Buck-Converter Performance Boost Feedback Current vs. Junction Temperature -200 nA -300 AED02939 In the following the behaviour of the Boost/Buck-converter and the oscillator is shown. Oscillator Frequency Deviation vs. Junction Temperature 10 kHz 5 Referred to f OSC at Tj = 25 ˚C AED02938 ∆f OSC I FB 0 -400 -5 -500 -10 -600 -15 -50 -25 0 25 50 75 100 ˚C 150 -700 -50 -25 0 25 50 75 100 ˚C 150 Tj Tj Current Consumption vs. Junction Temperature 3 mA 2.5 Boost ON Buck ON I BO boost = 0 mA I CC = 0 mA AED02940 Efficiency Buck vs. Load 90 % 85 RT, HT CT AED02942 I Boost η 2 80 1.5 75 1 70 0.5 -50 -25 0 25 50 75 100 ˚C 150 65 50 150 mA 250 Tj I LOAD Data Sheet 20 Rev. 3.4, 2007-08-16 TLE 6711 Diagrams: Oscillator and Boost/Buck-Converter Performance Efficiency Buck vs. Boost Voltage 95 AED02941 Oscillator Frequency vs. Resistor from R to GND 1000 kHz 500 AED02982 η% 90 fOSC VCC = 5 V 85 200 @ Tj = 25 ˚C 80 I Load = 120 mA 80 mA 100 75 50 70 40 mA 20 65 5 15 25 V 30 10 5 10 20 50 100 200 VBoost kΩ 1000 RR Efficiency Boost vs. Input Voltage 95 % 90 HT AED02943 Boost Output Voltage vs. Load 31 V AED02944 η I Boost = 60 mA VBoost 30 85 RT 80 CT 29 RT HT CT 28 75 27 70 8 10 12 14 V 16 26 20 40 60 80 mA 100 VBatt I LOAD Data Sheet 21 Rev. 3.4, 2007-08-16 TLE 6711 Diagrams: Oscillator and Boost/Buck-Converter Performance Boost and Logic Output Voltage vs. Junction Temperature 30 V 29 28 27 26 AED02983 Boost and Buck Overcurrent Threshold vs. Junction Temperature 1.4 A 1.3 AED02985 VBoost I OC I Boost = 50 mA I BOOC (Boost-Converter) 1.2 1.1 VCC V 5.025 5.000 4.975 4.950 -50 -25 0 25 50 75 100 ˚C 150 1 I BUOC (Buck-Converter) I CC = 250 mA 0.9 0.8 -50 -25 0 25 50 75 100 ˚C 150 Tj Tj Boost and Buck ON Resistance vs. Junction Temperature 1000 mΩ 800 AED02984 R ON 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 0.35 x 45˚ 1.75 MAX. 0.175 ±0.07 (1.47) C 4 -0.2 1.27 0.41+0.10 2) -0.06 14 B 0.1 0.2 M A B 14x 8 6±0.2 0.64 ±0.25 0.2 M C 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 8˚MAX. 1) 0.19 +0.06 Dimensions in mm Figure 13 PG-DSO-14-1 (Plastic Dual Small Outline Package) 2.65 MAX. 0.35 x 45˚ 7.6 -0.2 1) 2.45 -0.2 0.2 -0.1 1.27 0.35 +0.15 2) 0.4 +0.8 10.3 ±0.3 0.1 20x 0.2 20x 20 11 1 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 GPS05094 0.23 +0.09 Dimensions in mm Figure 14 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 8˚ MAX. Rev. 3.4, 2007-08-16 TLE 6711 Revision History 8 Revision History Changes Revision Date 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. 2006-03-16 Page 9: Figure 5 corrected, TWD = 128 tCYL. Page 19: Figure 12 corrected, Inductor type EPCOS B82442-H1224. 3.3 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.