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ADP222ACPZ-1827-R7 Arkusz danych(PDF) 1 Page - Analog Devices |
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ADP222ACPZ-1827-R7 Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 24 page Dual, 300 mA Output, Low Noise, High PSRR Voltage Regulators Data Sheet ADP222/ADP223/ADP224/ADP225 Rev. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2011 Analog Devices, Inc. All rights reserved. FEATURES Input voltage range: 2.5 V to 5.5 V Small, 8-lead, 2 mm × 2 mm LFCSP package Initial accuracy: ±1% High PSRR: 70 dB at 10 kHz, 60 dB at 100 kHz, 40 dB at 1 MHz Low noise: 27 µV rms at VOUT = 1.2 V, 50 µV rms at VOUT = 2.8 V Excellent transient response Low dropout voltage: 170 mV at 300 mA load 65 µA typical ground current at no load, both LDOs enabled Fixed output voltage from 0.8 V to 3.3 V (ADP222/ADP224) Adjustable output voltage range from 0.5 V to 5.0 V (ADP223/ADP225) Quick output discharge (QOD)—ADP224/ADP225 Overcurrent and thermal protection APPLICATIONS Portable and battery-powered equipment Portable medical devices Post dc-to-dc regulation Point of sale terminals Credit card readers Automatic meter readers Wireless network equipment TYPICAL APPLICATION CIRCUITS EN1 VOUT1 VIN EN2 GND 6 4 3 2 ADJ2 VOUT2 1 8 5 7 ADJ1 ADP223/ ADP225 R1 R4 R2 ON OFF ON OFF VIN = 4.2V + C1 1µF + C3 1µF + C2 1µF VOUT1 = 2.8V VOUT2 = 2.0V R3 Figure 1. ADP223/ADP225 EN1 VOUT1 VIN EN2 GND 6 4 3 2 SENSE2 VOUT2 1 8 5 7 SENSE1 ADP222/ ADP224 ON OFF ON OFF VIN = 4.2V + C1 1µF + C3 1µF + C2 1µF VOUT2 = 3.3V VOUT1 = 1.5V Figure 2. ADP222/ADP224 GENERAL DESCRIPTION The 300 mA, adjustable dual output ADP223/ADP225 and fixed dual output ADP222/ADP224 combine high PSRR, low noise, low quiescent current, and low dropout voltage in a voltage regulator that is ideally suited for wireless applications with demanding performance and board space requirements. The ADP222/ADP224 are available with fixed outputs voltages from 0.8V to 3.3V. The adjustable output ADP223/ADP225 may be set to output voltages from 0.5 V to 5.0 V. The low quiescent current, low dropout voltage, and wide input voltage range of the ADP222/ADP223/ADP224/ADP225 extend the battery life of portable devices. The ADP222/ADP223/ADP224/ADP225 maintain power supply rejection greater than 60 dB for frequencies as high as 100 kHz while operating with a low headroom voltage. The ADP222/ADP223/ADP224/ADP225 offer much lower noise performance than competing LDOs without the need for a noise bypass capacitor. Overcurrent and thermal protection circuitry prevent damage in adverse conditions. The ADP224 and ADP225 are identical to the ADP222 and ADP223, respectively, but with the addition of a quick output discharge (QOD) feature. The ADP222/ADP223/ADP224/ADP225 are available in a small 8-lead, 2 mm × 2 mm LFCSP package and are stable with tiny 1 µF, ±30% ceramic output capacitors, resulting in the smallest possible board area for a wide variety of portable power needs. |
Podobny numer części - ADP222ACPZ-1827-R7 |
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Podobny opis - ADP222ACPZ-1827-R7 |
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