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HT4993

2019/1/3 12:12:33
詳細(xì)介紹

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