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AAT3215IJS-285-T1 Datasheet(PDF) 7 Page - Advanced Analogic Technologies |
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AAT3215IJS-285-T1 Datasheet(HTML) 7 Page - Advanced Analogic Technologies |
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7 / 16 page  AAT3215 150mA CMOS High Performance LDO 3215.2002.03.0.91 7 Functional Description The AAT3215 is intended for LDO regulator appli- cations where output current load requirements range from no load to 150mA. The advanced circuit design of the AAT3215 pro- vides excellent input to output isolation, which allows for good power supply ripple rejection char- acteristics. To optimize for very low output self noise performance, a bypass capacitor pin has been provided to decrease noise generated by the internal voltage reference. This bypass capacitor will also enhance PSRR behavior. The two com- bined characteristics of low noise and high PSRR make the AAT3215 a truly high performance LDO regulator especially well suited for circuit applica- tions which are sensitive to their power source. The LDO regulator output has been specifically optimized to function with low cost, low ESR ceram- ic capacitors. However, the design will allow for operation over a wide range of capacitor types. The device enable circuit is provided to shutdown the LDO regulator for power conservation in portable products. The enable circuit has an additional output capacitor discharge circuit to assure sharp applica- tion circuit turn off upon device shutdown. This LDO regulator has complete short circuit and thermal protection. The integral combination of these two internal protection circuits give the AAT3215 a comprehensive safety system during extreme adverse operating conditions. Device power dissipation is limited to the package type and thermal dissipation properties. Refer to the thermal considerations discussion in the section for details on device operation at maximum output cur- rent loads. Functional Block Diagram Over-Current Protection Voltage Reference Error Amplifier Over-Temperature Protection IN BYP EN GND OUT |
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