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ADP3301AR-3 bảng dữ liệu(PDF) 1 Page - Analog Devices |
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ADP3301AR-3 bảng dữ liệu(HTML) 1 Page - Analog Devices |
1 / 8 page REV. 0 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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a ADP3301 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 World Wide Web Site: http://www.analog.com Fax: 617/326-8703 © Analog Devices, Inc., 1997 GENERAL DESCRIPTION The ADP3301 is a member of the ADP330x family of precision low dropout anyCAP™* voltage regulators. The ADP3301 stands out from the conventional LDOs with a novel architec- ture, an enhanced process and a new package. Its patented design includes a noninverting wideband driver and a stage that permits the use of an internal “pole splitting” capacitor to stabilize the feedback loop with a single output capacitor as small as 0.47 µF. This device is stable with any type of capacitor regardless of its ESR (Equivalent Serial Resistance) value, including ceramic types (MLCC) for space restricted applica- tions. The ADP3301 achieves exceptional accuracy of ±0.8% at room temperature and ±1.4% overall accuracy over tempera- ture, line and load regulations. The dropout voltage of the ADP3301 is only 100 mV (typical) at 100 mA. In addition to the new architecture and process, ADI’s new proprietary thermally enhanced package (Thermal Coastline) can handle 1 W of power dissipation without external heat sink or large copper surface on the PC board. This keeps PC board real estate to a minimum and makes the ADP3301 very attractive for use in portable equipment. High Accuracy anyCAP™* 100 mA Low Dropout Linear Regulator FEATURES High Accuracy (Over Line and Load Regulations at +25 C): 0.8% Ultralow Dropout Voltage: 100 mV Typical @ 100 mA Requires Only CO = 0.47 F for Stability anyCAP™* = Stable with All Types of Capacitors Current and Thermal Limiting Low Noise Dropout Detector Low Shutdown Current: 1 A Several Fixed Voltage Options 3.0 V to 12 V Supply Range –20 C to +85 C Ambient Temperature Range Thermally Enhanced SO-8 Package Excellent Line and Load Regulations APPLICATIONS Cellular Telephones Notebook, Palmtop Computers Battery Powered Systems Portable Instruments Post Regulator for Switching Supplies Bar Code Scanners The ADP3301 operates with a wide input voltage range from 3 V to 12 V and delivers a load current in excess of 100 mA. It features an error flag that signals when the device is about to lose regulation or when the short circuit or thermal overload protection is activated. Other features include shutdown and optional noise reduction capabilities. The ADP330x anyCAP™* LDO family offers a wide range of output voltages and output current levels from 50 mA to 300 mA: ADP3300 (50 mA, SOT-23) ADP3302 (100 mA, Dual Output) ADP3304 (100 mA, Dual Output with Separate Grounds) ADP3303 (200 mA) ADP3306 (300 mA) ADP3301-5.0 5 4 6 3 NR OUT IN 1 2 7 8 ERR R1 330k Ω EOUT C2 0.47µF VOUT = +5V ON OFF GND C1 0.47µF VIN Figure 1. Typical Application Circuit FUNCTIONAL BLOCK DIAGRAM Q2 THERMAL PROTECTION Gm Q1 CC BANDGAP REF DRIVER R1 R2 ADP3301 OUT IN ERR SD GND *anyCAP is a trademark of Analog Devices Inc. |
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