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AME8821BEEV250Y Datasheet(PDF) 1 Page - Analog Microelectronics |
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AME8821BEEV250Y Datasheet(HTML) 1 Page - Analog Microelectronics |
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1 / 15 page  AME 1 AME8821 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application Rev.A.04 n Typical Application l Guaranteed 250mA Output l 17 µA Quiescent Current l Over-Temperature Shutdown l Over-Current Limitation l Noise Reduction SR Capacitor l Power-Saving Shutdown Mode l Space-Saving SOT-25/TSOT-25 Packages l Factory Pre-set Output Voltages l Enable pin option l ENB active low enable l EN active high enable l All AME's Lead Free Products Meet RoHS Standards The AME8821 family of positive, linear regulators fea- ture low quiescent current (17 µA typ.) with low dropout voltage, making them ideal for battery applications. The space-saving SOT-25/TSOT-25 packages are attractive for “Pocket” and “Hand Held”applications. These rugged devices have both Thermal Shutdown, and Current Limitation to prevent device failure under the “Worst” operating conditions. In application requires a low noise regulated supply. The AME8821 family uses the SR pin to program the output voltage ’s slew rate to control the in-rush current. This is specifically used in the USB application where large load capacitance is present at start-up. The AME8821 also features a logic-enabled sleep mode to shutdown the regulator, reducing quiescent current to 1 µA typical at T A= 25 oC. The AME8821 is stable with an output capacitance of 4.7 µF or larger. n General Description n Features n Applications l Instrumentation l Portable Electronics l Wireless Devices l Cordless Phones l PC Peripherals l Battery Powered Widgets n Function Block Diagram * AME8821A: ENB, AME8821B: EN 4.7 µF + 1 µF AME8821A GND OUT IN ENB SR 0.01 µF V IN 1 µF AME8821B GND OUT IN EN SR 4.7 µF + 0.01 µF V IN AMP Current Limit / Thermal Protection 10K Ω GND SR V IN V OUT V ref R1 R2 * ENB or EN |
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