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TLE42794

Low Dropout Fixed Voltage Regulator

Data Sheet, Rev. 1.1, October 2008

Automotive Power

Summary of content (28 pages)

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Data Sheet, Rev. 1.
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Low Dropout Fixed Voltage Regulator 1 TLE42794 Overview Features • • • • • • • • • • • • • • • • Output Voltage 5 V ± 2% Ouput Current up to 150 mA Very low Current Consumption Early Warning Power-on and Undervoltage Reset with Programmable Delay Time Reset Low Down to VQ = 1 V Adjustable Reset Threshold Very Low Dropout Voltage Output Current Limitation Reverse Polarity Protection Overtemperature Protection Suitable for Use in Automotive Electronics Wide Temperature Range from -40 °C up to 150 °C Inpu
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TLE42794 Overview Dimensioning Information on External Components The input capacitor CI is recommended for compensation of line influences. The output capacitor CQ is necessary for the stability of the control loop. Circuit Description The control amplifier compares a reference voltage to a voltage that is proportional to the output voltage and drives the base of the series transistor via a buffer. Saturation control as a function of the load current prevents any oversaturation of the power element.
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TLE42794 Block Diagram 2 Block Diagram Ι Q Error Amplifier Current and Saturation Control Reference Trimming D RO & Reference SO RADJ SI GND Figure 1 Data Sheet AEB01955 Block Diagram 4 Rev. 1.
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TLE42794 Pin Configuration 3 Pin Configuration 3.1 Pin Assignment TLE42794G (PG-DSO-8) Ι SΙ RADJ D 1 2 3 4 8 7 6 5 Q SO RO GND AEP01668 Figure 2 Pin Configuration (top view) 3.
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TLE42794 Pin Configuration 3.3 Pin Assignment TLE42794GM (PG-DSO-14) RADJ D GND GND GND GND RO 1 2 3 4 5 6 7 14 13 12 11 10 9 8 SI Ι GND GND GND Q SO AEP02248 Figure 3 Pin Configuration (top view) 3.
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TLE42794 Pin Configuration 3.5 Pin Assignment TLE42794E (PG-SSOP-14 exposed pad) 5$'Q F ' *1' Q F Q F 52 6, , Q F 4 Q F Q F 62 3LQ&RQILJB6623 YVG Figure 4 Pin Configuration (top view) 3.6 Pin Definitions and Functions TLE42794E (PG-SSOP-14 exposed pad) Table 2 Pin Symbol Function 1 RADJ Reset Threshold Adjust connect an external voltage divider to adjust reset threshold; connect to GND for using internal threshold 2, 5, 6 n.c.
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TLE42794 General Product Characteristics 4 General Product Characteristics 4.1 Absolute Maximum Ratings Absolute Maximum Ratings 1) -40 °C ≤ Tj ≤ 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. VI -40 45 V – VQ -0.3 7 V – VD -0.
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TLE42794 General Product Characteristics 4.2 Pos. Functional Range Parameter 4.2.1 Input Voltage 4.2.2 Output Capacitor’s Requirements for Stability 4.2.3 Junction Temperature Symbol VI CQ ESR(CQ) Tj Limit Values Unit Conditions Min. Max. 5.
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TLE42794 General Product Characteristics 4.3 Pos. Thermal Resistance Parameter Symbol Limit Value Min. Typ. Unit Conditions Max. TLE42794G (PG-DSO-8) 4.3.4 Junction to Soldering Point1) RthJSP RthJA – 80 – K/W measured to pin 5 – 113 – K/W 2) 4.3.6 – 172 – K/W Footprint only3) 4.3.7 – 142 – K/W 300mm2 heatsink area on PCB3) 4.3.8 – 136 – K/W 600mm2 heatsink area on PCB3) 4.3.5 Junction to Ambient 1) TLE42794GM (PG-DSO-14) 4.3.
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TLE42794 Block Description and Electrical Characteristics 5 Block Description and Electrical Characteristics 5.1 Voltage Regulator The output voltage VQ is controlled by comparing a portion of it to an internal reference and driving a PNP pass transistor accordingly. The control loop stability depends on the output capacitor CQ, the load current, the chip temperature and the poles/zeros introduced by the integrated circuit.
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TLE42794 Block Description and Electrical Characteristics 5.2 Electrical Characteristics Voltage Regulator Electrical Characteristics Voltage Regulator VI = 13.5 V, -40 °C ≤ Tj ≤150 °C, all voltages with respect to ground, positive current flowing into pin (unless otherwise specified) Pos. Parameter Symbol Min. Typ. Max. 5.2.1 Output Voltage VQ 4.9 5.0 5.2.2 Output Current Limitation Load Regulation steady-state IQ,max ∆VQ,load 150 5.2.3 -30 5.2.
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TLE42794 Block Description and Electrical Characteristics 5.3 Typical Performance Characteristics Voltage Regulator Output Voltage VQ versus Junction Temperature TJ Output Current IQ versus Input Voltage VI 01_VQ_TJ.VSD 5,2 02_IQ_VI.VSD 300 V Q = 4.8 V I Q = 5 mA V I = 13.
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TLE42794 Block Description and Electrical Characteristics Load Regulation ∆VQ,load versus Output Current IQ Output Capacitor Series Resistor ESR(CQ) versus Output Current IQ 05_DVQ_DIQ.VSD 0 06_ESR_IQ.VSD 100 VI = 13.5 V C Q = 10 µF V I = 13.
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TLE42794 Block Description and Electrical Characteristics 5.4 Current Consumption Electrical Characteristics Voltage Regulator VI = 13.5 V, -40 °C ≤ Tj ≤150 °C, all voltages with respect to ground, positive current flowing into pin (unless otherwise specified) Pos. Parameter Symbol Limit Values Unit Conditions IQ = 100 µA Tj = 25 °C IQ = 100 µA Tj ≤ 85 °C IQ = 10 mA IQ = 50 mA Min. Typ. Max. – 210 280 µA 5.4.2 – 240 300 µA 5.4.3 – 0.7 1 mA 5.4.4 – 3.5 8 mA 5.4.
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TLE42794 Block Description and Electrical Characteristics 5.5 Typical Performance Characteristics Current Consumption Current Consumption Iq versus Output Current IQ (IQ low) Current Consumption Iq versus Output Current IQ 09_IQ_IQ_IQLOW.VSD 1,6 V I = 13.5 V T j = 25 °C 1,4 V I = 13.5 V T j = 25 °C 10 8 1 I q [mA] I q [mA] 1,2 10_IQ_IQ.
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TLE42794 Block Description and Electrical Characteristics 5.6 Reset Function The reset function provides several features: Output Undervoltage Reset: An output undervoltage condition is indicated by setting the Reset Output RO to “low”. This signal might be used to reset a microcontroller during low supply voltage. Power-On Reset Delay Time: The power-on reset delay time trd allows a microcontoller and oscillator to start up.
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TLE42794 Block Description and Electrical Characteristics Reset Output Pull-Up Resistor RRO: The Reset Output RO is an open collector output requiring an external pull-up resistor. In Table “Electrical Characteristics Reset Function” on Page 20 a minimum value for the external resistor RRO is given. Keep in mind to stay within the values specified for the Reset Output RO in Table 4.
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TLE42794 Block Description and Electrical Characteristics VI t t < trr,total VQ VRT 1V t t rd VD V DU V DRL t VRO V RO,low t rd trr,total trd t rr,total t rd t rr,total 1V t Thermal Shutdown Figure 7 Data Sheet Input Voltage Dip Undervoltage Spike at output Overload T i mi n g Di a g ra m_ Re se t . vs Timing Diagram Reset 19 Rev. 1.
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TLE42794 Block Description and Electrical Characteristics Electrical Characteristics Reset Function VI = 13.5 V, -40 °C ≤ Tj ≤ 150 °C, 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 4.65 4.8 V VQ decreasing Output Undervoltage Reset 5.6.1 Default Output Undervoltage Reset VRT Switching Thresholds Output Undervoltage Reset Threshold Adjustment 5.6.
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TLE42794 Block Description and Electrical Characteristics 5.7 Typical Performance Characteristics Reset Power On Reset Delay Time trd versus Junction Temperature Tj 12_TRD_TJ.VSD 35 C D = 100 nF 30 t rd [ms] 25 20 15 10 5 0 -40 0 40 80 120 160 T j [°C] Data Sheet 21 Rev. 1.
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TLE42794 Block Description and Electrical Characteristics 5.8 Early Warning Function The additional sense comparator provides an early warning function: Any voltage (e.g. the input voltage) can be monitored, an undervoltage condition is indicated by setting the comparator’s output to low. Sense Input Voltage VSI, High VSI, Low t Sense Output High Low t AED03049 Figure 8 Sense Timing Diagram Electrical Characteristics Early Warning Function VI = 13.
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TLE42794 Block Description and Electrical Characteristics Electrical Characteristics Early Warning Function VI = 13.5 V, -40 °C ≤ Tj ≤ 150 °C, all voltages with respect to ground, positive current flowing into pin (unless otherwise specified) Pos. Parameter Symbol Limit Values Min. Typ. Max. Unit Conditions VSI < VSI,low VI > 5.5 V RSO,ext = 10 kΩ VI > 5.5 V VSO ≤ 0.4 V Sense Comparator Output 5.8.5 Sense Output Low Voltage VSO,low – 0.1 0.4 V 5.8.
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TLE42794 Package Outlines 6 Package Outlines 0.1 2) 0.41+0.1 -0.06 0.2 8 5 1 4 5 -0.2 1) M B 0.19 +0.06 C 8 MAX. 1.27 4 -0.21) 1.75 MAX. 0.175 ±0.07 (1.45) 0.35 x 45˚ 0.64 ±0.25 6 ±0.2 A B 8x 0.2 M C 8x 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 GPS01181 Figure 9 Data Sheet PG-DSO-8 24 Rev. 1.
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TLE42794 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 0.2 M C 8 1 7 1) 8.75 -0.2 8˚MAX. 0.19 +0.06 0.175 ±0.07 (1.47) 0.35 x 45˚ 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 Figure 10 Data Sheet PG-DSO-14 25 Rev. 1.
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TLE42794 Package Outlines 0.15 M C A-B D 14x 0.64 ±0.25 1 8 1 7 0.2 M D 8x Bottom View 3 ±0.2 A 14 6 ±0.2 D Exposed Diepad B 0.1 C A-B 2x 14 7 8 2.65 ±0.2 0.25 ±0.05 2) 0.08 C 8˚ MAX. C 0.65 0.1 C D 0.19 +0.06 1.7 MAX. Stand Off (1.45) 0 ... 0.1 0.35 x 45˚ 3.9 ±0.11) 4.9 ±0.11) Index Marking 1) Does not include plastic or metal protrusion of 0.15 max.
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TLE42794 Revision History 7 Revision History Revision Date Changes 1.
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Edition 2008-10-09 Published by Infineon Technologies AG 81726 Munich, Germany © 2008 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.