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AME8822AEET260Z 数据表(PDF) 10 Page - Analog Microelectronics |
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AME8822AEET260Z 数据表(HTML) 10 Page - Analog Microelectronics |
10 / 21 page AME 10 High PSRR, 250mA CMOS LDO AME8822 Rev.F.04 The AME8822 is stable with an output capacitor to ground of 1 μF or larger. Ceramic capacitors have the low- est ESR, and will offer the best AC performance. Con- versely, Aluminum Electrolytic capacitors exhibit the high- est ESR, resulting in the poorest AC response. A second capacitor is recommended between the in- put and ground to stabilize V IN. The input capacitor should be at least 1 μF to have a beneficial effect. Detailed Description External Capacitors Enable The Enable Pin is normally pull-high. When activated pulled low, the PMOS pass transistor shuts off, and all internal circuits are powered down. In this state, the stand by current is less than 1 μA. This pin can’ t be floating. The AME8822 family of CMOS regulators contain a PMOS pass transistor, voltage reference, error amplifier, over-current protection, and thermal shutdown. The P-channel pass transistor receives data from the error amplifier, over-current shutdown, and thermal pro- tection circuits. During normal operation, the error ampli- fier compares the output voltage to a precision reference. Over-current and thermal shutdown circuits become ac- tive when the junction temperature exceeds 150oC, or the current exceeds 250mA. During thermal shutdown, the output voltage remains low. Normal operation is re- stored when the junction temperature drops below 130oC. The AME8822 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress. |
类似零件编号 - AME8822AEET260Z |
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类似说明 - AME8822AEET260Z |
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