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ADP3308ART-2.5

更新时间： 2024-11-23 12:47:59
品牌 Logo 应用领域
亚德诺 - ADI 线性稳压器IC调节器电源电路光电二极管输出元件
页数 文件大小 规格书
8页 118K
描述
anyCAP 50 mA Low Dropout Linear Regulator

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ADP3308ART-2.5 数据手册

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anyCAP® 50 mA  
Low Dropout Linear Regulator  
a
ADP3308  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
؎1.2% Accuracy Over Line and Load Regulations  
@ 25؇C  
Ultralow Dropout Voltage: 80 mV Typical @ 50 mA  
Requires Only CO = 0.47 ␮F for Stability  
anyCAP = Stable with All Types of Capacitors  
(Including MLCC)  
Q1  
IN  
OUT  
ADP3308  
CC  
THERMAL  
PROTECTION  
R1  
R2  
ERR/NC  
g
Q2  
DRIVER  
m
Current and Thermal Limiting  
Low Noise  
SD  
Low Shutdown Current: 1 ␮A  
2.8 V to 12 V Supply Range  
BANDGAP  
REF  
–20؇C to +85؇C Ambient Temperature Range  
Several Fixed Voltage Options  
Ultrasmall SOT-23-5 Package  
Excellent Line and Load Regulations  
GND  
APPLICATIONS  
Cellular Telephones  
Notebook, Palmtop Computers  
Battery Powered Systems  
PCMCIA Regulator  
Bar Code Scanners  
Camcorders, Cameras  
GENERAL DESCRIPTION  
ERR/NC  
4
1
The ADP3308 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 LP2980, but offers  
performance advantages. The ADP3308 stands out from the  
conventional 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 Serial Resistance)  
value, including ceramic types for space restricted applications.  
The ADP3308 achieves 1.2% accuracy at room temperature  
and 2.2% overall accuracy over temperature, line and load  
regulations. The dropout voltage of the ADP3308 is only 80 mV  
(typical) at 50 mA. This device also includes a current limit and  
a shutdown feature. In shutdown mode, the ground current is  
reduced to ~1 µA.  
ADP3308-3.3  
5
V
IN  
OUT  
V
= +3.3V  
IN  
OUT  
C2  
0.47␮F  
C1  
0.47␮F  
3
2
ON  
OFF  
SD  
GND  
Figure 1. Typical Application Circuit  
The ADP3308 operates with a wide input voltage range from  
2.8 V to 12 V and delivers a load current in excess of 100 mA.  
The ADP3308 anyCAP LDO offers a wide range of output  
voltages. For 100 mA version, refer to the ADP3309 data sheet.  
anyCAP is a registered trademark of Analog Devices, Inc.  
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  
which may result from its use. No license is granted by implication or  
otherwise under any patent or patent rights of Analog Devices.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781/329-4700  
Fax: 781/326-8703  
World Wide Web Site: http://www.analog.com  
© Analog Devices, Inc., 2000  
12345678

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