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ADP3302 bảng dữ liệu(PDF) 1 Page - Analog Devices |
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ADP3302 bảng dữ liệu(HTML) 1 Page - Analog Devices |
1 / 8 page REV. A 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 ADP3303A One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 1999 High Accuracy anyCAP™ Adjustable 200 mA Low Dropout Linear Regulator FUNCTIONAL BLOCK DIAGRAM Q2 THERMAL PROTECTION gm Q1 CC BANDGAP REF DRIVER ADP3303A OUT IN ERR SD GND FB ADP3303A ERR OUT IN FB R1 C2 1 F VOUT = +5V ON OFF SD GND C1 0.47 F VIN R2 R3 330k EOUT SD Figure 1. Typical Application Circuit FEATURES High Accuracy Over Line and Load: 0.8% @ +25 C, 1.4% Over Temperature Ultralow Dropout Voltage: 150 mV Typical @ 200 mA Requires Only CO = 1 F for Stability anyCAP = Stable with All Types of Capacitors (Including MLCC) Current and Thermal Limiting Low Noise Dropout Detector Low Shutdown Current: 1 A 3.2 V to 12 V Supply Range Adjustable 2.2 V to 10 V Output Range –20 C to +85 C Ambient Temperature Range Thermally Enhanced TSSOP-14 Package APPLICATIONS Cellular Telephones Notebook, Palmtop Computers Battery Powered Systems Portable Instruments Post Regulator for Switching Supplies Bar Code Scanners GENERAL DESCRIPTION The ADP3303A is a member of the ADP330x family of preci- sion low dropout anyCAP voltage regulators. The ADP3303A stands out from conventional LDOs with a novel architecture, an enhanced process and a new package. Its patented design requires only a 1 µF output capacitor for stability. This device is insensitive to output capacitor ESR (Equivalent Series Resis- tance), and is stable with any good quality capacitor, including ceramic types (MLCC) for space restricted applications. The ADP3303A achieves exceptional accuracy of ±0.8% at room temperature and ±1.4% overall accuracy over temperature, line and load variations. The dropout voltage of the ADP3303A is only 150 mV (typical) at 200 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 an external heat sink or large copper surface on the PC board. This keeps PC board real estate to a minimum and makes the ADP3303A very attractive for use in portable equipment. The ADP3303A operates over an input voltage range of 3.2 V to 12 V and delivers a load current in excess of 200 mA. The output voltage can be adjusted from 2.2 V to 10 V using an external resistor divider. It also 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 fea- tures include shutdown and optional noise reduction capabilities. anyCAP is a trademark of Analog Devices Inc. |
Số phần tương tự - ADP3302 |
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Mô tả tương tự - ADP3302 |
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