DatasheetsPDF.com

ADP225 Dataheets PDF



Part Number ADP225
Manufacturers Analog Devices
Logo Analog Devices
Description High PSRR Voltage Regulators
Datasheet ADP225 DatasheetADP225 Datasheet (PDF)

Data Sheet Dual, 300 mA Output, Low Noise, High PSRR Voltage Regulators ADP222/ADP223/ADP224/ADP225 09376-001 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 fr.

  ADP225   ADP225


Document
Data Sheet Dual, 300 mA Output, Low Noise, High PSRR Voltage Regulators ADP222/ADP223/ADP224/ADP225 09376-001 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 VIN = 4.2V + C1 1µF R1 ON OFF ON OFF 1 EN1 ADJ1 8 ADP223/ ADP225 2 EN2 VOUT1 7 R2 VOUT1 = 2.0V + C2 1µF 3 GND VIN 6 4 ADJ2 VOUT2 5 VOUT2 = 2.8V R3 + C3 1µF R4 VIN = 4.2V + C1 1µF ON OFF ON OFF Figure 1. ADP223/ADP225 1 EN1 SENSE1 8 ADP222/ ADP224 2 EN2 VOUT1 7 3 GND VIN 6 4 SENSE2 VOUT2 5 VOUT1 = 1.5V + C2 1µF VOUT2 = 3.3V + C3 1µF 09376-101 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 Figure 2. ADP222/ADP224 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. Rev. E Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2011–2014 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com ADP222/ADP223/ADP224/ADP225 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Typical Application Circuits............................................................ 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Input and Output Capacitor, Recommended Specifications .. 4 Absolute Maximum Ratings............................................................ 5 Thermal Data ................................................................................ 5 Thermal Resistance ...................................................................... 5 ESD Caution.................................................................................. 5 Pin Configuration and Function Descriptions............................. 6 REVISION HISTORY 5/14—Rev. D to Rev. E Changes to Figure 1 .......................................................................... 1 Changes to Figure 64, VOUT1 Equation and Following Text ...... 17 Deleted Paralleling Outputs to Increase Output Current Section and Figure 70................................................................................... 19 Updated Outline Dimensions .......................................


ADP224 ADP225 ADP5054


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)