TLE7272

5-V Low Drop Voltage Regulator TLE 7272 Features • • • • • • • • Output voltage 5 V ±2% Ultra low current consumption: typ. 25µA 300 mA current capability Inhibit input Reset Very low-drop voltage Short-circuit-proof Suitable for use in automotive electronics P-TO252-5-1 Functional Description The TLE 7272 is a monolithic integrated low-drop voltage regulator for load currents up to 300 mA. An input voltage up to 42 V is regulated to VQ,nom = 5.0 V with a precision of ±2%. Due to its integrated reset circuitry featuring power on timing and output voltage monitoring P-TO263-5-1 the IC is well suited as µ-controller supply. The sophisticated design allows to achieve stable operation even with ceramic output capacitors down to 470 nF. The device is designed for the harsh environment of automotive applications. Therefore it is protected against overload, short circuit and overtemperature conditions. Of course the TLE 7272 can be used also in all other applications, where a stabilized 5 V voltage is required. Due to its ultra low stand-by current consumption of typ. 20 µA the TLE 7272 is dedicated for use in applications permanently connected to VBAT. In addition the IC can be switched off via the Inhibit input reducing the current consumption to typ. 5 µA. An integrated output sink current circuitry keeps the voltage at the Output pin Q below 5.5 V even when reverse currents are applied. Thus connected devices are protected from overvoltage damage. For applications requiring extremely low noise levels the Infineon voltage regulator family TLE 42XY and TLE 44XY is more suited than the TLE 7272. A mV-range output noise on the TLE 7272 caused by the charge pump operation is unavoidable due to the ultra low quiescent current concept. Type TLE 7272 D TLE 7272 G Data Sheet Ordering Code Q67006-A9734 Q67006-A9735 1 Package P-TO252-5 P-TO263-5 Rev. 1.0a, 2005-02-08 TLE 7272 Reset The Reset pin informs e.g. the microcontroller in case the output voltage has fallen below the lower threshold VRT of typ. 4.65 V. The hysteresis is typically 100mV. Connecting the regulator to a battery voltage at first the reset signal remains LOW. When the output voltage has reached the reset threshold VRT the reset output RO remains still LOW for the reset delay time trd (typ. 16 ms). Afterwards the reset output turns HIGH. 1 TLE 7272 5 Q Overtemperature Shutdown Bandgap Reference Reset Generator 2 RO 1 4 Inhibit Charge Pump 3 GND AEB03523.VSD Figure 1 Block Diagram Data Sheet 2 Rev. 1.0a, 2005-02-08 TLE 7272 GND I RO INH Q AEP02825_7272 Ι GND Q RO INH IEP02528 Figure 2 Table 1 Pin No. 1 2 I RO Pin Configuration P-TO252-5 (D-PAK), P-TO263-5 (D2-PAK)(top view) Pin Definitions and Functions Symbol Function Input; block to ground directly at the IC with a ceramic capacitor. Reset Output; Open Collector Output with integrated pull-up resistor of typically 30kΩ. Optional external pull-up resistor of ≥ 10 kΩ to pin Q. Ground; Pin 3 internally connected to heatsink. Inhibit Input; low level disables the IC. Integrated pull-down resistor. Output; block to ground with a ceramic capacitor, C ≥ 470 nF. 3 4 5 GND INH Q Data Sheet 3 Rev. 1.0a, 2005-02-08 TLE 7272 Table 2 Parameter Input I Voltage Current Output Q Voltage Voltage Current Absolute Maximum Ratings Symbol Limit Values Min. Max. 45 – 5.5 6.2 – 5.5 6.2 1 45 1 150 150 V mA V V mA V V mA V mA °C °C – – – Unit Test Condition VI II VQ VQ IQ VRO VRO IRO VINH IINH Tj Tstg -0.3 -1 -0.3 -0.3 -1 -0.3 -0.3 -1 -0.3 -1 -40 -50 t < 10 s1) – – Reset Output RO Voltage Voltage Current Inhibit Input INH Voltage Current Temperature Junction temperature Storage temperature – – Observe current limit IINHmax2) – t < 10 s1) – 1) Exposure to these absolute maximum ratings for extended periods (t > 10 s) may affect device reliability. 2) External resistor required to keep the current below the absolute maximum rating when voltages ≥ 5.5 V are applied. Note: Stresses above those listed here may cause permanent damage to the device. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Data Sheet 4 Rev. 1.0a, 2005-02-08 TLE 7272 Table 3 Parameter Input voltage Operating Range Symbol Limit Values Min. Max. 42 150 V °C – – 5.5 -40 Unit Remarks Junction temperature VI Tj Note: In the operating range, the functions given in the circuit description are fulfilled. Table 4 Parameter Junction case Junction ambient Junction ambient 1) area 300 mm2 2) Worst case, regarding peak temperature; zero airflow; mounted on a PCB FR4, 80 area 300 mm2 Thermal Resistance Symbol Limit Values Min. Max. 8 80 55 K/W – K/W TO2521) – – – Unit Remarks K/W TO2632) Worst case, regarding peak temperature; zero airflow; mounted on a PCB FR4, 80 × 80 × 1.5 mm3, heat sink × 80 × 1.5 mm3, heat sink Rthj-c Rthj-a Rthj-a Data Sheet 5 Rev. 1.0a, 2005-02-08 TLE 7272 Application Information Table 5 Parameter Output Q Output voltage Output voltage Electrical Characteristics Symbol Limit Values Min. Typ. Max. 5.0 5.0 – – 20 – 5 250 15 5 60 0.5 – 5.1 5.1 – 800 30 40 9 500 40 20 – – – Unit Measuring Condition VQ VQ 4.9 4.9 320 – – – – – – 40 – 20 – – 470 V V mA mA µA µA µA mV mV mV dB 0.1 mA