HT4993
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
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Operating DC supply voltage range 5.6V to 31V
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Output voltage tolerance: ≤ ±2%
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Low-drop voltage ≤ 400mV
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Current capability up to 150mA
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Reset circuit sensing the output voltage down to 1V
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Programmable reset pulse delay with external capacitor
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Watchdog
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Programmable watchdog timer with external capacitor
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Enable input for enabling/disabling the watchdog functionality
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Thermal shutdown and short circuit protection
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Tj operation temperature -40 to +150С
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Certified by AEC-Q100 standard