ts 4268 180ma fixed - voltage ultra low ldo 1 / 7 version: b07 sop - 8 general description t s4268 is a 5v low - drop fixed - voltage regulator. the maximum input voltage is 45 v. it can deliver an output current of at least 180ma. t s4268 is short - circuit proof and features temperature protecti on 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 t s4268 regula tes an input voltage in the range 5.5v ~ 45v. in the event of an output voltage vout < v rt , a reset signal is generated. the wiring of the reset switching threshold input enables the value of v rt 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 repeti tion time. the watchdog function is only activated if the load exceeds 8ma. 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 over temperature. features output voltage tolerance < |