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TS39152CM5 Arkusz danych(PDF) 6 Page - Taiwan Semiconductor Company, Ltd |
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TS39152CM5 Arkusz danych(HTML) 6 Page - Taiwan Semiconductor Company, Ltd |
6 / 7 page TS39151/52 6-6 2004/09 rev. A Application Information (continues) Adjustable Regulator Design The adjustable regulator versions (TS39152) is allow to programming the output voltage anywhere between 1.25 and the 16V maximum operating rating of the family. Two resistors are used. Resistors can be quite large up to 1MΩ, because of the very high input impedance and low bias current of the sense comparator, the resistor values are calculated by: R1 = R2 * [(Vout / 1.24) – 1] Where is Vout the desired output voltage. Above application circuit shows component definition. Applications with widely varying load currents may scale the resistors to draw the minimum load current required for proper operation. Error Flag TS39151 versions feature an Error Flag, which looks at the output voltage and signals an error condition when this voltage drops 5% below its expected value. The error flag is an open-collector output that pulls low under fault conditions. It may sink 10mA. Low output voltage signifies a number of possible problems, including an over-current fault (the device is in current limit) and low input voltage. The flag output is inoperative during over temperature shutdown conditions. Enable Input TS39151 and TS39152 versions feature an enable (EN) input that allows ON/OFF control of the device. Special design allows “zero” current drain when the device is disabled–only microamperes of leakage current flow. The EN input has TTL/CMOS compatible thresholds for simple interfacing with logic, or may be directly tied to ≤20V. Enabling the regulator requires approximately 30uA of current. |
Podobny numer części - TS39152CM5 |
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Podobny opis - TS39152CM5 |
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