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GENERAL DESCRIPTION

The HT4993 is a monolithic integrated low-drop fixed voltage regulator 150mA with low current consumption.

The regulating output voltage element consists in a p-channel MOS and the regulation is performed regardless of input voltage transients up to 40V. The high precision of the output voltage is obtained with a pre-trimmed reference voltage. The HT4993 is protected against short circuit and an over- temperature protection switches off the IC in case of extremely high power dissipation.

Reset and watchdog make this device particularly suitable to supply microprocessor systems in automotive applications.

FEATURES

•   Operating DC supply voltage range 5.6V to 31V

•   Output voltage tolerance: ≤ ±2%

•   Low-drop voltage ≤ 400mV

•   Current capability up to 150mA

•   Reset circuit sensing the output voltage down to 1V

•   Programmable reset pulse delay with external capacitor

•   Watchdog

•   Programmable watchdog timer with external capacitor

•   Enable input for enabling/disabling the watchdog functionality

•   Thermal shutdown and short circuit protection

•   Tj operation temperature -40 to +150С

•   Certified by AEC-Q100 standard