TLE4268GS Datasheet | Siemens Semiconductor Group

5-V Low-Drop Fixed Voltage Regulator TLE 4268 Features - - - - - - - - - - Output voltage tolerance ≤ ± 2 % Very low current consumption Low-drop voltage Watchdog Settable reset threshold Overtemperature protection Reverse polarity protection Short-circuit proof Suitable for use in automotive electronics Wide temperature range P-DSO-8-1 Type TLE 4268 GS TLE 4268 G Ordering Code Q67006-A9229 Q67006-A9146 Package P-DSO-8-1 (SMD) P-DSO-20-6 (SMD) P-DSO-20-6 Functional Description This device is a 5-V low-drop fixed-voltage regulator. The maximum input voltage is 45 V. It can deliver an output current of at least 180 m A. The IC is short-circuit proof and Features temperature protection that disables the circuit in the event of impermissibly high temperatures. The watchdog function is disabled as a function of the load, so that a controller is not interrupted during sleep mode by a watchdog reset. Application Description The IC regulates an input voltage Vi in the range 5.5 V < Vi < 45 V to Vqrated = 5.0 V. In the event of an output voltage VQ < VRT, a reset signal is generated. The wiring of the reset switching threshold input enables the value of VRT to be reduced. The reset delay time can be adjusted using an external capacitor. The integrated watchdog monitors the connected active controller. If there is no positive-going edge at the watchdog input, the reset output is set to low. The reset delay capacitor provides a wide adjustment range for the pulse repetition time. The watchdog function is only activated if the load exceeds 8 m A. This ensures that a microcontroller is not activated during power-down and the current drain is not increased. The IC is protected against overload and overtemperature. Semiconductor Group 1 1998-11-01 TLE 4268 Pin Configuration (top view) P-DSO-8-1 VΙ N.C. QRES GND 1 2 3 4 8 7 6 5 AEP01954 VQ W SRES DRES Figure 1 Pin Definitions and Functions Pin 1 2 3 4 5 6 7 8 Symbol Function Input voltage Not connected Reset output...