TS4268CS50

Preliminary TS 4268 180mA Ultra Low Dropout Voltage Regulator with Reset & Watchdog Function SOP-8 Pin Definition: 1. Input 2. N/C 3. Reset Outpu t 4. Ground 8. Output 7. Watchdog 6 . Ra d j 5. Reset Delay General Description TS4268 is a low dropout voltage regulator. The maximum input voltage is 45 V. It can deliver an output current of at least 180mA. TS4268 is short circuit proof and features temperature protection that disables the circuit in the event of imper missibly 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 TS4268 regulates an input voltage in the range 5.5V ~ 45V. In the event of an output voltage Vout < VRT, a res et 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 adjus ted us ing an external capacitor . The integrated watchdog monitors the connec ted ac tive controller . If there is no positive going edge at the w atchdog input, the reset output is set to low . The reset delay capacitor provides a w ide adjustment range for the pulse repetition time. The w atchdog function is only ac tivated if the load exceeds 8mA. This ensures that a microcontr oller is not activated dur ing pow er-down and the current drain is not increased. Features ● ● ● ● ● ● ● ● ● ● Output voltage tolerance < ± 2 % Very low current consumption Low-drop voltage Watchdog Settable reset threshold Over temperatur e protection Reverse polar ity protection Shor t-circuit proof Suitable for use in automotive electr onics Wide temperature range Ordering Information Part No. TS4268C S50 RL Package SOP-8 Packi ng 2.5Kpcs/ 13” Reel Pin Description Pin No. 1 2 3 4 5 6 7 8 Symbol IN N/C RO GN D RD RADJ WI OU T Pin Descripti on Input Voltage. block to ground directly with ceramic capacitor Not C onnec ted Reset Output. the open collec tor output is connected to the 5V output via an integrated resistor of 30kΩ Ground Reset Delay. connect a capacitor to ground for delay time adjus tment. Reset Switching Threshold. for setting the switching threshold, output to ground with voltage divider. If this input is connected to ground, the reset is tr iggered at an output voltage of 4.5V. Watchdog Input. positive-edge-triggered input for monitoring a microcontroller . Output Voltage. block to ground with 22uF capacitor , ESR