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ADP3309ART-33 Datasheet(PDF) 1 Page - Analog Devices |
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ADP3309ART-33 Datasheet(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 ADP3309 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., 1998 anyCAP™ 100 mA Low Dropout Linear Regulator FUNCTIONAL BLOCK DIAGRAM THERMAL PROTECTION DRIVER GM CC IN ADP3309 OUT R1 R2 GND Q1 ERR/NC SD BANDGAP REF Q2 FEATURES 1.2% Accuracy Over Line and Load Regulations @ +25 C Ultralow Dropout Voltage: 120 mV Typical @ 100 mA Requires Only CO = 0.47 F for Stability anyCAP = Stable with All Types of Capacitors (Including MLCC) Current and Thermal Limiting Low Noise Low Shutdown Current: 1 A 3.0 V to 12 V Supply Range –20 C to +85 C Ambient Temperature Range Several Fixed Voltage Options Ultrasmall SOT-23-5 Package Excellent Line and Load Regulations APPLICATIONS Cellular Telephones Notebook, Palmtop Computers Battery Powered Systems PCMCIA Regulator Bar Code Scanners Camcorders, Cameras GENERAL DESCRIPTION The ADP3309 is a member of the ADP330x family of precision low dropout anyCAP voltage regulators. It is pin-for-pin and functionally compatible with National’s LP2981, but offers performance advantages. The ADP3309 stands out from con- ventional LDOs with a novel architecture and an enhanced process. Its patented design requires only a 0.47 µF output capacitor for stability. This device is stable with any type of capacitor regardless of its ESR (Equivalent Series Resistance) value, including ceramic types for space restricted applications. The ADP3309 achieves ±1.2% accuracy at room temperature and ±2.2% overall accuracy over temperature, line and load regulations. The dropout voltage of the ADP3309 is only 120 mV (typical) at 100 mA. This device also includes a current limit and a shutdown feature. In shutdown mode, the ground current is reduced to ~1 µA. The ADP3309 operates with a wide input voltage range from 3.0 V to 12 V and delivers a load current in excess of 100 mA. The ADP3309 anyCAP LDO offers a wide range of output voltages. For a 50 mA version, refer to the ADP3308 data sheet. VOUT = +3.3V VIN + – ADP3309-3.3 OUT ERR/NC ON OFF SD GND IN C2 0.47 F C1 0.47 F + – Figure 1. Typical Application Circuit anyCAP is a trademark of Analog Devices, Inc. |
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