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ADP123-EVALZ 데이터시트(PDF) 9 Page - Analog Devices |
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ADP123-EVALZ 데이터시트(HTML) 9 Page - Analog Devices |
9 / 24 page Data Sheet ADP122/ADP123 Rev. E | Page 9 of 24 –100 –90 –80 –70 –60 –50 –40 –30 –20 –10 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) IOUT = 100µA VIN = VOUT + 0.5V VRIPPLE = 50mV CIN = COUT 1µF IOUT = 1mA IOUT = 10mA IOUT = 100mA IOUT = 200mA IOUT = 300mA Figure 21. Power Supply Rejection Ratio vs. Frequency, VOUT= 4.2 V, VIN = 4.7 V –100 –90 –80 –70 –60 –50 –40 –30 –20 –10 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) VOUT = 2.8V, IOUT = 1mA VIN = VOUT + 0.5V VRIPPLE = 50mV CIN = COUT 1µF VOUT = 3.3V, IOUT = 1mA VOUT = 4.2V, IOUT = 1mA VOUT = 2.8V, IOUT = 300mA VOUT = 3.3V, IOUT = 300mA VOUT = 4.2V, IOUT = 300mA Figure 22. Power Supply Rejection Ratio vs. Frequency, Various Output Voltages and Load Currents –100 –90 –80 –70 –60 –50 –40 –30 –20 –10 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) VIN = 3.1V, IOUT = 1mA VRIPPLE = 50mV CIN = COUT 1µF VIN = 3.3V, IOUT = 1mA VIN = 3.8V, IOUT = 1mA VIN = 4.8V, IOUT = 1mA VIN = 3.1V, IOUT = 300mA VIN = 3.3V, IOUT = 300mA VIN = 3.8V, IOUT = 300mA VIN = 4.8V, IOUT = 300mA Figure 23. Power Supply Rejection Ratio vs. Headroom Voltage (VIN − VOUT), VOUT = 2.8 V 0 1 2 3 4 5 10 100 1k 10k 100k FREQUENCY (Hz) VOUT = 2.8V VOUT = 3.3V VOUT = 4.2V Figure 24. Output Noise Spectrum 30 35 40 45 50 55 60 65 70 0.001 0.01 0.1 1 10 100 1000 IOUT (mA) VOUT = 4.2V VOUT = 3.3V VOUT = 2.8V Figure 25. Output Noise vs. Load Current and Output Voltage CH1 200mA Ω B W CH2 50.0mV B W M 40.0µs A CH1 196mA 1 2 T 10.20% VOUT VIN = 3.7V VOUT = 3.3V 1mA TO 300mA LOAD STEP IOUT Figure 26. Load Transient Response, COUT = 1 μF |
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