5-V Low Drop Fixed Voltage Regulator TLE 4299 Features Output voltage 5 V 2% 150 mA Output current Extreme low current consumption typical 65 A in ON state Inhibit function: Below 1 A current consumption P-DSO-8-3, -6, -7, -8, -9 in off mode Early warning Reset output low down to V = 1 V Q Adjustable reset threshold Overtemperature protection Reverse polarity proof Wide temperature range Functional Description P-DSO-14-3, -8, -9, -11, 14 The TLE 4299 is a monolithic voltage regulator with fixed 5-V output, supplying loads up to 150 mA. It is especially designed for applications that may not be powered down while the motor is off. It only needs a quiescent current of typical 65 A. In addition the TLE 4299 GM includes an inhibit function. When the inhibit signal is removed, the device is switched off and the quiescent current is less than 1 A. To achieve proper operation of the -controller, the device supplies a reset signal. The reset delay time is selected application-specific by an external delay capacitor. The reset threshold is adjustable. An early warning signal supervises the voltage at pin SI. The TLE 4299 is pin-compatible to the TLE 4269 and functional similar with the additional inhibit function. The TLE 4299 is designed to supply microcontroller systems even under automotive environment conditions. Therefore it is protected against overload, short circuit and overtemperature. Type Ordering Code Package TLE 4299 G Q67006-A9417 P-DSO-8-3 TLE 4299 GM Q67006-A9441 P-DSO-14-8 Data Sheet 1 Rev. 1.1, 2004-01-01 TLE 4299 Circuit Description The TLE 4299 is a PNP based very low drop linear voltage regular. It regulates the output voltage to V = 5 V for an input voltage range of 5.5 V V 45 V. The control Q I circuit protects the device against potential caused by damages overcurrent and overtemperature. The internal control circuit achieves a 5 V output voltage with a tolerance of 2%. The device includes a power on reset and an under voltage reset function with adjustable reset delay time and adjustable reset switching threshold as well as a sense control/early warning function. The device includes an inhibit function to disable it when the ECU is not used for example while the motor is off. The reset logic compares the output voltage V to an internal threshold. If the output Q voltage drops below this level, the external reset delay capacitor C is discharged. When D V is lower than V , the reset output RO is switched Low. If the output voltage drop is D LD very short, the V level is not reached and no reset-signal is asserted. This feature LD avoids resets at short negative spikes at the output voltage e.g. caused by load changes. As soon as the output voltage is more positive than the reset threshold, the delay capacitor is charged with constant current. When the voltage reaches V the reset UD output RO is set High again. The reset threshold is either the internal defined V voltage (typical 4.6 V) or can be RT lowered by a voltage level at the RADJ input down to 3.5 V. The reset delay time and the reset reaction time are defined by the external capacitor C . The reset function is active D down to V = 1 V. I In addition to the normal reset function, the device gives an early warning. When the SI voltage drops below V , the devices asserts the SI output Low to indicate the logic SI,low and the -processor that this voltage has dropped. The sense function uses a hysteresis: When the SI-voltage reaches the V level, SO is set high again. This feature can be SI,high used as early warning function to notice the -controller about a battery voltage drop and a possible reset in a short time. Of cause also any other voltage can be observed by this feature. The user defines the threshold by the resistor-values R and R . SI1 SI2 For the exact timing and calculation of the reset and sense timing and thresholds, please refer to the application section. Data Sheet 2 Rev. 1.1, 2004-01-01