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APE8805A-15Y5P Datasheet(PDF) 4 Page - Advanced Power Electronics Corp. |
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APE8805A-15Y5P Datasheet(HTML) 4 Page - Advanced Power Electronics Corp. |
4 / 7 page 4/7 APE8805A Shutdown Pin Voltage (ON) VSHDN(ON) 1.4 V Shutdown Pin Voltage (OFF) VSHDN(OFF) 0.4 V Shutdown Exit Delay Time ∆T CBP=0.1uF, COUT=1uF, IOUT=30mA 300 µs Note 1:The dropout voltage is defined as VIN-VOUT, which is measured when VOUT drops about 100mV. Note 2:Regulation is measured at a constant junction temperature by using 40ms current pulse and load regulation in the load range from 0mA to 600mA. Application Information The APE8805A is a low dropout linear regulator that could provide 600mA output current at dropout volt- age about 600mV. Current limit and on chip thermal shutdown features provide protection against any combination of overload or ambient temperature that could exceed maximum junction temperature. 1. Output and Input Capacitor The APE8805A regulator is designed to be stable with a wide range of output capacitors. The ESR of the output capacitor affects stability. Larger value of the output capacitor decreases the peak deviations and improves transient response for larger current changes. The capacitor types (aluminum, ceramic, and tant- alum) have different characterizations such as temperature and voltage coefficients. All ceramic capacitors are manufactured with a variety of dielectrics, each with different behavior across temperature and applications. Common dielectrics used are X5R, X7R and Y5V. It is recommended to use 1uF to 10uF X5R or X7R dielectric ceramic capacitors with 30m Ω to 50mΩ ESR range betw- een device outputs and ground for stability. The APE8805A is designed to be stable with low ESR ceramic capacitors and higher values of ca- pacitors and ESR could improve output stability. The ESR of output capacitor is very important because it generates a zero to provide phase lead for loop stability. There are no requirements for the ESR on the input capacitor, but its voltage and temperature coefficient have to be considered for device application environment. 2. Protection Features In order to prevent overloading or thermal con- dition from damaging the device, APE8805A has internal thermal and current limiting functions designed to protect the device. It will rapidly shut off PMOS pass element during overload- ing or over temperature condition. 3. Thermal Consideration The power handling capability of the device will be limited by maximum operation junction temperature. The power dissipated by the device will be estimated by PD = IOUT × (VIN-VOUT). The power dissipation should be lower than the maximum power dissipation listed in “Absolute Maximum Ratings” section. 4. Shutdown Operation The APE8805A is shutdown by pulling the SHDN input low, and turned on by driving the SHDN high. If this function is not used, the SHDN input should be tied to VIN to keep the regu- lator on at all times (the SHDN must not be left floating). Advanced Power Electronics Corp. |
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