TLE4265 Datasheet | Siemens Semiconductor Group

5-V Low-Drop Voltage Regulator TLE 4265 Bipolar IC Features q q q q q q q q q Output voltage tolerance ≤ ± 2 % Low-drop voltage Very low standby current consumption Overtemperature protection Reverse polarity protection Short-circuit proof Setable reset threshold Wide temperature range Suitable for use in automotive electronics P-TO220-5-1 Type TLE 4265 TLE 4265S Ordering Code Q67000-A9138 Q67000-A9277 Package P-TO220-5-1 P-TO220-5-2 P-TO220-5-2 Functional Description TLE 4265 is a 5-V low-drop voltage regulator in a TO220-5 package. Maximum input voltage is 45 V. It can produce an output current of > 200 m A. The IC is shortcircuit-proof and thermal protected. Application The IC regulates an input voltage VI in the range 6 V < VI < 45 V to VQrated = 5.0 V. A reset signal is generated for an output voltage VQ of < 4.5 V. The reset delay can be set with an external capacitor. This voltage regulator is especially suitable for microprocessor applications in automobiles. Semiconductor Group 1998-11-01 TLE 4265 Pin Configuration (top view) P-TO220-5-1 P-TO220-5-2 VΙ GND VQ QRES DRES AEP01492 Pin Definitions and Functions Pin 1 2 3 4 5 Symbol Function Input voltage; block direct on IC with ceramic capacitor to GND Reset output; open-collector output connected to output across resistor of 30 kΩ Ground Reset delay; wire with capacitor to GND for setting delay 5-V output voltage; block to GND with 22-µF capacitor QRES GND DRES Semiconductor Group 1998-11-01 TLE 4265 Circuit Description The control amplifier pares a highly precise reference voltage, produced by resistor alignment, to a voltage that is proportional to the output voltage and drives the base of the series transistor via a buffer. A saturation control, a function of the load current, prevents any over-saturating of the power element. If the output voltage drops below 4.5 V, the external reset-delay capacitor is discharged by the reset generator. If the...