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| 5-V Low-Drop Voltage Regulator Preliminary Data Features q q q q q q q q q TLE 4258 Bipolar IC Low-drop voltage Low quiescent current Reset output Protection against reverse polarity Overvoltage protection 70 V Short-circuit proof Suited for automotive electronics Inhibit input Wide temperature range P-TO220-7-1 Type TLE 4258 Ordering Code Q67000-A8238 Package P-TO220-7-1 The TLE 4258 is a very low drop voltage regulator which provides two regulated 5-V output voltages. The main regulator can be loaded with 750 mA and is turned on and off by pin 5 (pin 5 unconnected = main regulator off). In addition, the main regulator incorporates a short-circuit current limitation and is turned off in case of overvoltage (VI > VI OFF). The standby regulator can be loaded with 35 mA, it does not incorporate a short-circuit current limitation and remains permanently active at positive input voltage independent of the turn-off functions of the main regulator. If the main regulator output voltage is less than 4.5 V, the reset output is switched to low without delay. As soon as the reset threshold has been exceeded, a delay time to be set by an external capacitor expires and afterwards the reset output switches to high again. If the lines to the controller are long, the oscillating circuit of line inductance and input capacitance C I can be attenuated by a resistor 1 connected in series to C I. Circuit Description The TLE 4258 incorporates a main and standby-control regulator: The amplifiers regulate the output voltage by comparing the output voltage (from the voltage divider) with a highly precise reference voltage. The standby regulator directly controls the base of a PNP series transistor and the main regulator via a buffer that can be turned off with inhibit pulse at pin 5. If the output voltage VQ at pin 7 drops below 4.5 V, a reset signal is released which can only be disabled after a delay time to be set at pin 6. The main output is current-limited and remains active up to the input voltage VI OFF. Semiconductor Group 1 09.94 TLE 4258 Pin Configuration (top view) Pin Definitions and Functions Pin 1 2 Symbol VI Q RES Function Input of voltage regulator Reset output; open-collector output NPN to pin 4. If the output voltage VQ drops below the reset threshold, the output stage becomes conductive. Standby output, connect with a capacitor 10 F Ground; reference potential Inhibit (main regulator ON/OFF), input for turning on/off main regulator, connected to a 22-k series resistor. With open input, the main regulator remains turned off. Reset delay; pin for reset capacitor; the size of this capacitor determines the delay time of the reset signal typ. 175 ms/F. Main regulator output, connected to a capacitor 22 F. 2 3 4 5 Q ST GND INH 6 7 D RES VQ REG Semiconductor Group TLE 4258 Block Diagram Semiconductor Group 3 TLE 4258 Absolute Maximum Ratings TA = - 40 to 150 C Parameter Symbol min. Input (Pin 1) Supply voltage Polarity reversal with test pulse t 2 100 ms see test circuit Load-dump with pulse shape t 2 400 ms see test circuit Slew rate 0 V VI 24 V Slew rate 24 V VI 70 V Current Reset Output (Pin 2) Voltage Current Standby Output (Pin 3) Voltage Current Ground (Pin 4) Current Inhibit (main regulator on/off), (Pin 5) Current Reset delay (Pin 6) Voltage Main regulator output (Pin 7) Voltage VI VQ Current Temperature Junction temperature Storage temperature Operating Range Input voltage Junction temperature Thermal resistance system - air system - case VI Tj R th SA R th SC 4 6 - 40 - - 24 150 65 4 V C K/W K/W Tj Tstg - - 50 150 150 C C I GND I INH VC VQ IQ - - - - - 1.8 Limit Values max. Unit VI VI VI SR SR II - 15 - 70 - - - - 36 - - 70 100 10 2.5 V V V - V/s V/s A VR IR - - 8 10 V mA VST I ST - - 6 50 V mA A mA V V A 7.5 VQ 18 1.8 Semiconductor Group TLE 4258 Characteristics VI = 13.5 V; Tj = 25 C; V5 > 3.5 V (unless otherwise specified) Parameter Symbol Limit Values min. Main Regulator Output voltage VQ 4.85 - 5.15 V 0 mA I Q 750 mA 6 V < VI < VI off - 40 C T j 125 C I Q = 0 mA; I ST = 0 mA I Q = 450 mA; I ST = 0 mA I Q = 750 mA; I ST = 0 mA VI = 5.8 V; I Q = 750 mA; I ST = 0 mA VI > VI off VI > VI off VQ = 0 V; 6 V VI < 13.5 V VI = 4.5 V; I Q = 450 mA VI = 4.5 V; I Q = 750 mA 6 V VI 16 V 0 mA - I Q 750 mA I Q = 75 mA of I Q = 750 mA C Q 50 F IQ = 750 mA; VI = 12 V +1 V cos (2 x 120 Hz x t); SVR = 20 log (1 V/VQ) VI = 0; 0 V VQ 4.85 V typ. max. Unit Test Condition Input current Current consumption without load IQ IQ IQ IQ VI OFF IQ I SC VDr VDr - - - - 25 - 0.75 - - - - - - - - 1 0.3 0.5 - - - 30 150 300 300 - 20 1.8 0.5 0.75 0.2 150 - mA mA mA mA V mA A V V Turn-OFF voltage Output current Short-circuit current Drop voltage Static load regulation Dynamic load regulation Supply voltagerejection VQ/I Q - VQ SVR - 60 mV dB Reverse output current - I QR Temperature drift of output voltage Reset Generator Switching threshold Switching voltage Reverse current Change current Reset delay time VRT VR VR IR Ich t D/CD VQ - - 0.5 5 - 30 0.5 mA mV/K 6 V VI VI off Tj > 50 K 4.4 4.4 - 10 - 4.5 - - - 175 4.6 0.8 VQ 5 30 - V V V A A - VQ < VRT; I R = 10 mA VQ > VRT VR > 4.6 V; 0.5 V < VCd < (0.75 x VQ) ms/F - Semiconductor Group 5 TLE 4258 Characteristics (cont'd) VI = 13.5 V; Tj = 25 C; V5 > 3.5 V (unless otherwise specified) Parameter Standby regulator Output voltage Symbol - VST VST Current consumption without load Drop voltage Static load regulation Supply voltage rejection Reverse current General Ratings Reverse polarity - VQ -IQ - VST - I ST - - - - 0 0 0 0 0.7 0.5 0.7 0.5 200 V mA V mA mV VI = - 15 V VI = - 15 V VI = - 15 V VI = - 15 V 0 mA I ST 35 mA 0 mA I Q 750 mA 6 V VI < VI off - VQ > 3 V; I Q = 0.5 A VQ < 3 V; IQ = 1 mA Z Q = R + (j C) - 1 I QST I QST VDrST VST/I SVR ST ST Limit Values min. - 4.7 4.5 - - - - 60 - typ. - - - - - - 1 - - max. - 5.3 6.0 2 15 0.75 - - 2 Unit - V V mA mA V Test Condition V5 0.5 V 0 mA I ST 35 mA 6 V VI VI off 0 mA I ST 35 mA VI off VI 70 V; t 2 400 ms I Q = 0 mA; I ST = 0 mA I Q = 0 mA; I ST = 35 mA VI = 4.5 V; I ST = 35 mA 6 V VI < VI off 0 mA I ST 35 mA I ST = 35 mA; VI = 12 V + 1 V x cos (2 x 120 Hz x t) VI = 0 V; 0 V VST 4.7 V dB mA - I ST Synchronous operation VST - VQ VST; VQ Necessary series resistance Switching threshold for main regulator Load impedance R5 V5 V5 RQ - 200 - 12 3.5 - - 22 - - 0 24 - 0.5 2 k V V Semiconductor Group 6 TLE 4258 Application Circuit Test Circuit Semiconductor Group 7 TLE 4258 1. Test Pulse for Negative Interference Voltages VI VB = 14 V t 1 = 10 s t 2 = 2 ms VS = 70 V t 3 = 0.5 s to 5 s R i = 10 Semiconductor Group 8 TLE 4258 2. Pulse for Load Dump at V14 VB = 14 V VS = 70 V R i = 0.5 t 1 = 5 ms t 2 = 400 ms Semiconductor Group 9 TLE 4258 Minimum Drop Voltage versus Output Current TC = 25 C; Vi = 4.5 V Current Consumption without Load versus Output Current TC = 25 C Current Consumption without Load versus Input Voltage TC = 25 C Output Voltage versus Input Voltage TC = 25 C Semiconductor Group 10 TLE 4258 Output Voltage versus Temperature Short-Circuit Current versus Input Voltage TC = 25 C Semiconductor Group 11 |
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