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HT71A5044 Datasheet(PDF) 4 Page - Holtek Semiconductor Inc |
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HT71A5044 Datasheet(HTML) 4 Page - Holtek Semiconductor Inc |
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4 / 6 page  Application Circuits HT71AXXXX Rev. 1.00 4 December 29, 2009 V O U T G N D V I N 2 V I N 1 V D E T V D D V S E N 4 7 0 k W C O U T 2 . 2 m F C I N 2 . 2 m F Functional Description The HT71Axxxx devices are a series of combined regu- lator and detector devices. The voltage regulator part of the devices have very low dropout voltage and low cur- rent consumption and can supply up to 30mA of output current. The output voltage is available in both 3.3V and 5V types. An input voltage of up to 12V can be accepted on their input pin. The voltage detector part of the devices can detect an externally supplied voltage on its sense pin. This exter- nally supplied voltage will be compared with a fixed in- ternal reference voltage which can have a range of fixed voltages ranging from 2.4V to 4.4V. When the external sense voltage falls below the detect voltage the detector output will switch low. The detector output is an open drain NMOS type therefore users must connect an ex- ternal pull-high resistor for correct operation. The volt- age detectors consist of a high-precision and low power consumption standard voltage source as well as a com- parator, hysteresis circuit, and an output driver. CMOS technology ensures low power consumption. Although designed primarily as fixed voltage detectors, these de- vices can be used with external components to detect user specified threshold voltages. |
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Similar Description - HT71A5044 |
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