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Automotive Power

Data Sheet

Rev. 2.1, 2010-11-22

TLE7368

Next Generation Micro Controller Supply

TLE7368G

TLE7368E

TLE7368-2E

TLE7368-3E

Summary of content (41 pages)

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TLE7368 Next Generation Micro Controller Supply TLE7368G TLE7368E TLE7368-2E TLE7368-3E Data Sheet Rev. 2.
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TLE7368 Table of Contents Table of Contents 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 3.1 3.2 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Next Generation Micro Controller Supply 1 TLE7368 Overview Features • • • • • • • • • • • • • • • • • High efficient next generation microcontroller power supply system Wide battery input voltage range < 4.5 V up to 45 V Operating temperature range Tj = -40 °C to +150 °C Pre-regulator for low all over power loss: Integrated current mode Buck converter 5.5 V/2.5 A Post-regulators, e.g. for system and controller I/O supply: – LDO1: 5 V ±2%, 800 mA current limit – LDO2: 3.3 V ±2% or 2.
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TLE7368 Overview Description The TLE7368 device is a multifunctional power supply circuit especially designed for Automotive powertrain systems using a standard 12 V battery. The device is intended to supply and monitor next generation 32-bit microcontroller families (13 µm lithography) where voltage levels such as 5 V, 3.3 V or 1.5/1.2/1.3 V are required. The regulator follows the concept of its predecessor TLE6368/SONIC, where the output of a pre-regulator feeds the inputs of the micro’s linear supplies.
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TLE7368 Block Diagram 2 Block Diagram CCP C2+ C2C1+ C1- INT.BIASING, CHARGE PUMP BST IN PWM CONTROLLER 5.5V SW TLE 7368 FB/L_IN Q_T1 TEMPERATURE SENSE Q_T2 EN_µC EN_IGN ENABLE ≥1 Q_LDO1 5.0V RO_1 RT RO_2 WDI RESET (WINDOW COMPARATOR) TIMING RESET (WINDOW COMPARATOR) IN_LDO2 Q_LDO2 2.6/3.3V SEL_LDO2 1.5/ 1.2/ 1.3V DRV_EXT FB_EXT WINDOW WATCHDOG WDO IN_STBY Q_STBY 1.0/2.6V MON_STBY STANDBY MONITOR SEL_STBY GND_P GND_A Figure 1 Data Sheet Block Diagram 5 Rev. 2.
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TLE7368 Pin Configuration 3 Pin Configuration 3.1 Pin Assignment GND GND_A RT RO_1 1 36 2 35 MON_STBY IN_STBY 3 34 Q_STBY RO_2 4 33 N.C. N.C. 5 32 N.C. IN_LDO2 6 31 DRV_EXT Q_LDO2 7 30 FB_EXT Q_T1 8 29 Q_LDO1 Q_T2 EN_uC 9 10 TLE 7368 G 28 27 FB/L_IN BST EN_IGN 11 26 SW SEL_STBY 12 25 SW C1- 13 24 WDO C2- 14 23 WDI C1+ 15 22 SEL_Q2 C2+ CCP GND_P 16 21 20 17 18 19 N.C.
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TLE7368 Pin Configuration Pin Pin Symbol (TLE7368G) (TLE7368E) Function 6 5 IN_LDO2 LDO2 input; Connect this pin straight to the Buck converter output or add a dropper in between to reduce power dissipation on the chip. 7 6 Q_LDO2 Voltage regulator 2 output; 3.3 V or 2.6 V, depending on the state of SEL_LDO2. Block to GND with capacitor for stable regulator operation; selection of capacitor CQ_LDO2 according to Chapter 4.4 and Chapter 6.
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TLE7368 Pin Configuration Pin Pin Symbol (TLE7368G) (TLE7368E) Function 22 23 SEL_LDO2 Selection input LDO2; Connect to GND to select 2.6 V output voltage for LDO2; Connect straight to Q_LDO2 to select 3.3 V output voltage for LDO2.
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TLE7368 General Product Characteristics 4 General Product Characteristics 4.1 Absolute Maximum Ratings Absolute Maximum Ratings 1) Tj = -40 °C to +150 °C; all voltages with respect to ground. Pos. Parameter Symbol Limit Values Unit Conditions Min. Max. VIN_STBY IIN_STBY -0.3 45 V – – – A Limited internally VSEL_STBY VSEL_STBY ISEL_STBY -0.3 5.5 V – -0.3 6.2 V t < 10 s2) – – A Limited internally VIN VIN IIN VSW - 0.3 45 V – -0.
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TLE7368 General Product Characteristics Absolute Maximum Ratings (cont’d)1) Tj = -40 °C to +150 °C; all voltages with respect to ground. Pos. Parameter Symbol Limit Values Unit Conditions Min. Max. VRO_2 VRO_2 IRO_2 -0.3 5.5 V – -0.3 6.2 V t < 10 s2) – – A Limited internally VRT VRT IRT -0.3 5.5 V – -0.3 6.2 V t < 10 s2) – – A Limited internally -5 40 V VFB/L_IN = 5.5V -5 35 V off mode; VFB/L_IN = 0V – A Limited internally Reset Output RO_2 4.1.24 Voltage 4.1.
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TLE7368 General Product Characteristics Absolute Maximum Ratings (cont’d)1) Tj = -40 °C to +150 °C; all voltages with respect to ground. Pos. Parameter Symbol Limit Values Min. Unit Conditions Max. Feedback and Post-Regulators Input FB/L_IN 4.1.52 Voltage 4.1.53 Voltage 4.1.54 Current VFB/L_IN VFB/L_IN IFB/L_IN VQ_LDO1 - 0.3 18 V – -0.3 18 V – – – A Limited internally VIN_LDO2 VIN_LDO2 IIN_LDO2 VQ_LDO2 - 0.3 18 V – -0.
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TLE7368 General Product Characteristics Note: 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. Note: 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. 4.
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TLE7368 General Product Characteristics 4.4 Electrical Characteristics Electrical Characteristics VIN = VIN_STBY = 13.5 V, Tj = -40 °C to +150 °C, VCCP = 9.0 V; SEL_STBY = Q_STBY; all voltages with respect to ground. Pos. Parameter Symbol Limit Values Unit Conditions Min. Typ. Max. f tr, I 280 370 425 kHz – – 50 – ns 1) Buck Regulator 4.4.1 Switching frequency 4.4.2 Current transition rise/fall time 4.4.3 Power stage on resistance RON, Buck – – 280 mΩ – 4.4.
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TLE7368 General Product Characteristics Electrical Characteristics (cont’d) VIN = VIN_STBY = 13.5 V, Tj = -40 °C to +150 °C, VCCP = 9.0 V; SEL_STBY = Q_STBY; all voltages with respect to ground. Pos. Parameter Symbol Limit Values Unit Conditions Min. Typ. Max. 4.9 – 5.1 V 1 mA < IQ_LDO1 < 700 mA3) 800 – 1600 mA – – 400 mV VQ_LDO1 = 4.0 V IQ_LDO1 = 500 mA; Voltage Regulator Q_LDO1 4.4.16 4.4.17 4.4.
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TLE7368 General Product Characteristics Electrical Characteristics (cont’d) VIN = VIN_STBY = 13.5 V, Tj = -40 °C to +150 °C, VCCP = 9.0 V; SEL_STBY = Q_STBY; all voltages with respect to ground. Pos. Parameter Symbol Limit Values Min. Typ. Max. Unit Conditions SEL_LDO2 = GND; VCCP = 9 V; IQ_LDO2 = 250 mA; VIN = 4.5 V;4)6) 4.4.32 Drop voltage Vdr, Q_LDO2 – – 400 mV 4.4.33 Load regulation ∆VQ_LDO2 – – 65 mV/A 2.6 V mode 1 mA < IQ_LDO2 < 650 mA 4.4.
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TLE7368 General Product Characteristics Electrical Characteristics (cont’d) VIN = VIN_STBY = 13.5 V, Tj = -40 °C to +150 °C, VCCP = 9.0 V; SEL_STBY = Q_STBY; all voltages with respect to ground. Pos. Parameter Symbol Limit Values Min. Typ. Max. Unit Conditions 4.4.51 Power supply ripple rejection PSRRQ_T1 26 – – dB VFB/L_IN = 5.6 V; VFB/L_IN, ripple pp = 150 mV; fFB/L_IN, ripple = 370 kHz; VQ_LDO1 = 5.0 V; IQ_T1 = 100 mA; CQ_T1 = 4.7µF ceramic X7R;1) 4.4.52 Output capacitor 4.
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TLE7368 General Product Characteristics Electrical Characteristics (cont’d) VIN = VIN_STBY = 13.5 V, Tj = -40 °C to +150 °C, VCCP = 9.0 V; SEL_STBY = Q_STBY; all voltages with respect to ground. Pos. 4.4.65 Parameter Load regulation Symbol ∆VQ_ STBY Limit Values Min. Typ. Max. – – 5 Unit Conditions V/A IQ_STBY = 100µA to 10 mA VIN_STBY > 4.5 V; SEL_STBY = Q_STBY VQ_STBY = 1.0V – – 10 V/A IQ_STBY = 100µA to 10 mA VIN_STBY > 4.5 V; SEL_STBY = GND VQ_STBY = 2.6V 4.4.
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TLE7368 General Product Characteristics Electrical Characteristics (cont’d) VIN = VIN_STBY = 13.5 V, Tj = -40 °C to +150 °C, VCCP = 9.0 V; SEL_STBY = Q_STBY; all voltages with respect to ground. Pos. Parameter Symbol Limit Values Min. Unit Conditions Typ. Max. – 4.75 V – 4.90 V VQ_LDO1 decreasing; VFB/L_IN = open; VQ_LDO1 increasing 4.4.79 Undervoltage Reset threshold on Q_LDO1 VURT Q_LDO1, 4.50 4.4.80 Undervoltage Reset threshold on Q_LDO1 VURT Q_LDO1, 4.55 4.4.
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TLE7368 General Product Characteristics Electrical Characteristics (cont’d) VIN = VIN_STBY = 13.5 V, Tj = -40 °C to +150 °C, VCCP = 9.0 V; SEL_STBY = Q_STBY; all voltages with respect to ground. Pos. Parameter Symbol Limit Values Min. Overvoltage Reset threshold on Q_LDO2 VORT Q_LDO2, 3.55 4.4.98 Overvoltage Reset hysteresis VORO_2, hyst 4.4.99 Undervoltage Reset threshold on Q_LDO2 VURT Q_LDO2, 2.485 4.4.97 4.4.100 3.
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TLE7368 General Product Characteristics Electrical Characteristics (cont’d) VIN = VIN_STBY = 13.5 V, Tj = -40 °C to +150 °C, VCCP = 9.0 V; SEL_STBY = Q_STBY; all voltages with respect to ground. Pos. 4.4.112 Parameter Undervoltage Reset headroom on FB_EXT Symbol VFB_EXT VURT FB_EXT, Limit Values Unit Conditions Min. Typ. Max. 40 60 – mV TLE7368-2E VFB/L_IN = 5 V or VQ_LDO2 = 3.3/2.6 V; 15 – 45 mV TLE7368-2E – 1.39 V TLE7368-2E VFB_EXT increasing; – 1.
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TLE7368 General Product Characteristics Electrical Characteristics (cont’d) VIN = VIN_STBY = 13.5 V, Tj = -40 °C to +150 °C, VCCP = 9.0 V; SEL_STBY = Q_STBY; all voltages with respect to ground. Pos. 4.4.128 Parameter Overvoltage Reset reaction time Data Sheet Symbol tOVRR, RO_2 Limit Values Min. Typ. Max. 20 – 80 21 Unit Conditions µs Buck converter operating; Voltage step on FB_EXT from VFB_EXT, nom to VORT FB_EXT, in, max + 20 mV Rev. 2.
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TLE7368 General Product Characteristics Electrical Characteristics (cont’d) VIN = VIN_STBY = 13.5 V, Tj = -40 °C to +150 °C, VCCP = 9.0 V; SEL_STBY = Q_STBY; all voltages with respect to ground. Pos. Parameter Symbol Limit Values Min. Typ. Max. – – – – Unit Conditions Monitoring Block 4.4.129 MON_STBY, Threshold on Q_STBY VMON, Q_STBY, 0.90 VIN_STBY = 3.0 V; SEL_STBY = Q_STBY; VQ_STBY decreasing; de 4.4.
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TLE7368 General Product Characteristics Electrical Characteristics (cont’d) VIN = VIN_STBY = 13.5 V, Tj = -40 °C to +150 °C, VCCP = 9.0 V; SEL_STBY = Q_STBY; all voltages with respect to ground. Pos. Parameter Symbol Limit Values Min. Typ. Max. Unit Conditions Window Watchdog 4.4.136 H-input voltage threshold VWDI, high – – 2.0 V – 4.4.137 L-input voltage threshold VWDI, low 0.8 – – V – 4.4.
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TLE7368 Detailed Internal Circuits Description 5 Detailed Internal Circuits Description In the following the main circuit blocks of the TLE7368, namely the Buck converter, the linear regulators, the trackers, the charge pump, the enable and reset circuits and the watchdog are described in more detail. 5.1 Buck Regulator The TLE7368’s DC to DC converter features all the functions necessary to implement a high efficient, low emission Buck regulator with minimum external components.
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TLE7368 FB/L_IN - Over voltage shutdown Slope control Over temp. shutdown OTSD R S Q & Oscillator Slope compensation Level shifter + Charge pump Under voltage shutdown - - + + C1+ C1- C2+ C2- Level shifter CCP High side driver Bootstrap charger DMOS power stages SW BST Detailed Internal Circuits Description IN Error amplifier - + Current comparator Current sense amplifier - + Figure 3 Buck Converter Block Diagram 5.1.
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TLE7368 Detailed Internal Circuits Description 5.1.4 Charge Pump The charge pump serves as support circuit for the Buck converter’s high side driver supply, the linear regulators drive circuits for low drop operation and the internal device biasing blocks. In order to guarantee full device operation at battery voltages as allow as even 4.5 V, the concept of a voltage tripler is chosen for the charge pump.
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TLE7368 Detailed Internal Circuits Description 5.4 Power Up and Power Down Sequencing In a supply system with multiple outputs the sequence of enabling the individual regulators is important. Especially 32-bit microcontrollers require a defined power up and power down sequencing. Figure 4 shows the details for the power up and power down sequence of the TLE7368. At power up, the first circuit block to be enabled is the charge pump as it is mandatory for the other circuits to operate.
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TLE7368 Detailed Internal Circuits Description VIN VIN, on VIN, off t VCCP VCCP, ok t VBST VBST, on t VSW t VFB/L_IN *) t VQ_LDO1 *) drop depending on application / setup *) t VQ_LDO2 VQ_LDO1 -0.3 < (Q_LDO1-Q_LDO2) < 3.1V *) t VFB_EXT VQ_LDO2 *) -0.3 < ( Q_LDO2 - FB_EXT) Linear regulators not actively discharged at power down; externa Schottky diodes required to meet uC”s sequencing requirements t VQ_T<1,2> VQ_LDO1 *) t Figure 4 Data Sheet Power Sequencing of the TLE7368 28 Rev. 2.
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TLE7368 Detailed Internal Circuits Description 5.5 Stand-by Regulator The intention of the stand-by or keep alive regulator is to supply e.g. external memory even with the main microcontroller supply being disabled. Therefore the state of the stand-by regulator is not controlled by the enable block, but it is active all the time. The stand-by regulator starts to operate as soon as the battery voltage increases above its operating threshold.
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TLE7368 Detailed Internal Circuits Description VFB/L_IN VQ_LDO1 t VORT Q_LDO1, in VORT Q_LDO1, de VURT Q_LDO1, in < tOVRR, RO_1 VRO_1 tRD, RO_1 tRD, RO_1 *) VURT Q_LDO1, de < tUVRR, RO_1 tRD, RO_1 tUVRR, RO_1 tUVRR, RO_1 t t VQ_LDO2 VORT Q_LDO2, in VORT Q_LDO2, de VURT Q_LDO2, in VFB_EXT < tOVRR, RO_2 VURT Q_LDO2, de < tUVRR, RO_2 VORT FB_EXT, in VORT FB_EXT, de VURT FB_EXT, in < tUVRR, RO_2 tRD, RO_2 VRO_2 tRD, RO_2 < tOVRR, RO_2 tRD, RO_2 VURT FB_EXT, de t tRD, RO_2 **) t
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TLE7368 Detailed Internal Circuits Description 5.9 Monitoring Circuit The monitoring block within the TLE7368 detects an undervoltage at the stand-by regulator output and is able to distinguish between two different undervoltage situations. When the stand-by output gets back into regulation after an undervoltage event, the timing on the MON_STBY output signal indicates the kind of undervoltage scenario which has happened before.
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TLE7368 Detailed Internal Circuits Description VIN t VIN_STBY t VQ_STBY VMON, Q_STBY, in VMON, Q_STBY, de < tRR, MON_STBY1 t VRO_1 *) VMON_STBY *) tMON_STBY tRR, MON_STBY Power on reset functionality, with RO_1 low during under voltage at Q_STBY *) Figure 7 Data Sheet t tRR, MON_STBY tRR, MON_STBY Power fail functionality, w/o delay, with RO_1 high during under voltage at Q_STBY t output pulled to e.g. Q_LDO1 by 10kOhm Stand by Monitor Timing Diagram 32 Rev. 2.
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TLE7368 Detailed Internal Circuits Description 5.10 Watchdog Circuit WDO = LOW Always Trigger During Closed Window Ignore Window No Trigger During Open Window Always Trigger Closed Window Open Window No Trigger AEA03533.VSD Figure 8 Window Watchdog State Diagram Principle of Operation: A Window Watchdog is integrated in the TLE7368 to monitor a microcontroller. The Window Watchdog duty cycle consists of an "Open window" and a "Closed window".
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TLE7368 Detailed Internal Circuits Description input WDI. A valid trigger signal is a falling edge from VWDI,high to VWDI,low. After receiving a valid trigger signal within the "Open Window" the watchdog immediately terminates the "Open Window" and enters the "Closed Window" state. The "Closed Window" has a fixed duration tWD,W. During normal operation a trigger signal should not be applied during the "Closed Window.
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TLE7368 Application Information 6 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. C1 C2 CCP BST INT.BIASING, CHARGE PUMP Battery Input IN 5.5V PWM CONTROLLER 5.5V SW TLE 7368 FB/L_IN Q_T1 5V, to sensor TEMPERATURE SENSE Q_T2 from µC from IGN EN_µC EN_IGN ENABLE ≥1 Q_LDO1 5V, to sensor 5V 5.
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TLE7368 Application Information This section intends to give hints for correct set up of the IC, i.e. to avoid misbehavior caused by the influence of other PCB board circuits and shows also how to calculate external components, power loss, etc. 6.
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TLE7368 Application Information 6.4 Setting up the Stand-by Regulator The stand by regulator provides an output current up to 30 mA sourced via linear regulation directly from Battery even when the main regulator is disabled. This low quiescent current regulator is commonly used as supply for stand by memory. The output voltage can be selected as 1.0 V or 2.6 V. For stability of the regulation loop the output Q_STBY should be connected via a ceramic capacitor (470 nF to 2 µF) to GND. 6.4.
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TLE7368 Package Outlines 6.3 5˚ ±3˚ Heatslug 0.1 C 36x 0.95 ±0.15 0.25 M ABC 17 x 0.65 = 11.05 14.2 ±0.3 0.25 B Bottom View 19 36 19 5.9 ±0.1 0.25 +0.13 36 +0.07 -0.02 0.25 1.3 15.74 ±0.1 (Heatslug) B 2.8 3.2 ±0.1 0.65 11 ±0.15 1) 3.5 MAX. 0 +0.1 1.1 ±0.1 3.25 ±0.1 Package Outlines 2) 7 Index Marking 1 x 45˚ 1 18 15.9 ±0.1 1) 10 13.7 -0.2 Data Sheet Heatslug A 1) Does not include plastic or metal protrusion of 0.15 max.
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TLE7368 8˚ MAX. 1.1 7.6 -0.2 1) 0.65 0.7 ±0.2 C 17 x 0.65 = 11.05 0.33 ±0.08 2) 0.23 +0.09 0.35 x 45˚ 2.55 MAX. 3) 0...0.10 STAND OFF 2.45 -0.2 Package Outlines 0.1 C 36x SEATING PLANE 10.3 ±0.3 0.17 M A-B C D 36x D Bottom View A 19 19 Ejector Mark 36 Exposed Diepad 1 Index Marking Ey 36 18 1 18 B Ex 12.8 -0.21) Index Marking Exposed Diepad Dimensions 4) Ex Leadframe Package PG-DSO-36-24, -41, -42 A6901-C001 7 A6901-C003 7 PG-DSO-36-38 A6901-C007 5.
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TLE7368 Revision History 8 Revision History Rev Date Changes 2.1 2010-11-22 • • Final datasheet for TLE7368G, TLE368E, TLE7368-2E and TLE7368-3E No modification of component or change of electrical parameters 2.0 2009-12-16 • • • • • Final datasheet for TLE7368G and TLE7368E Target Datasheet for TLE7368-2E and TLE7368-3E Overview updated Figure 1 and Figure 10 updated Electrical characteristics: LDO_3 for variants TLE7368-2E and TLE7368-3E included 1.
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Edition 2010-11-22 Published by Infineon Technologies AG 81726 Munich, Germany © 2010 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.