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ADP3334AR Arkusz danych(PDF) 1 Page - Analog Devices |
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ADP3334AR Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 12 page REV. B 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. 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 companies. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 © 2003 Analog Devices, Inc. All rights reserved. ADP3334 High Accuracy, Low IQ, anyCAP® Adjustable Low Dropout Regulator FEATURES High Accuracy over Line and Load: 0.9% @ 25 C, 1.8% over Temperature 500 mA Current Capability Ultralow Dropout Voltage Requires Only CO = 1.0 F for Stability anyCAP = Stable with Any Type of Capacitor (Including MLCC) Current and Thermal Limiting Low Noise Low Shutdown Current: < 1.0 A (Typ) 2.6 V to 11 V Supply Range 1.5 V to 10 V Output Range –40 C to +85 C Ambient Temperature Range APPLICATIONS Cellular Phones TFT LCD Modules Camcorders, Cameras Networking Systems, DSL/Cable Modems Cable Set-Top Boxes DSP Supplies Personal Digital Assistants GENERAL DESCRIPTION The ADP3334 is a member of the ADP333x family of precision low dropout anyCAP voltage regulators. The ADP3334 operates with an input voltage range of 2.6 V to 11 V and delivers a continuous load current up to 500 mA. The novel anyCAP architecture requires only a very small 1 µF output capacitor for stability, and the LDO is insensitive to the capacitor’s equivalent series resistance (ESR). This makes the ADP3334 stable with any capacitor, including ceramic (MLCC) types for space restricted applications. The ADP3334 achieves exceptional accuracy of ±0.9% at room temperature and ±1.8% over temperature, line, and load. The dropout voltage of the ADP3334 is only 200 mV (typical) at 500 mA. This device also includes a safety current limit, ther- mal overload protection, and a shutdown feature. In shutdown mode, the ground current is reduced to less than 1 µA. The ADP3334 has low quiescent current of 90 µA (typical) in light load situations. FUNCTIONAL BLOCK DIAGRAM THERMAL PROTECTION CC IN ADP3334 OUT GND Q1 BAND GAP REF DRIVER gm FB SD The ADP3334 is available in three different package options: 1. Excellent thermal capability, space saving 3 mm 3 mm LFCSP. 2. Popular low profile MSOP-8. 3. Traditional thermal enhanced SOIC-8. CNR ADP3334 OUT VIN IN GND VOUT ON OFF IN OUT R1 R2 SD CIN 1 F FB COUT 1 F Figure 1. Typical Application Circuit |
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