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ADP122AUJZ-1.8-R7 PDF预览

ADP122AUJZ-1.8-R7

更新时间： 2024-11-26 12:29:07
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亚德诺 - ADI 稳压器
页数 文件大小 规格书
24页 611K
描述
5.5 V Input, 300 mA, Low Quiescent Current, CMOS Linear Regulator

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ADP122AUJZ-1.8-R7 数据手册

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5.5 V Input, 300 mA, Low Quiescent  
Current, CMOS Linear Regulator  
Data Sheet  
ADP122/ADP123  
FEATURES  
TYPICAL APPLICATION CIRCUITS  
Input voltage supply range: 2.3 V to 5.5 V  
300 mA maximum output current  
Fixed and adjustable output voltage versions  
Very low dropout voltage: 85 mV at 300 mA load  
Low quiescent current: 45 µA at no load  
Low shutdown current: <1 µA  
V
= 2.3V TO 5.5V  
V
= 1.8V  
IN  
OUT  
1
5
VIN  
VOUT  
C
C
IN  
OUT  
1µF  
ADP122  
1µF  
2
3
GND  
ON  
4
EN  
NC  
OFF  
Initial accuracy: 1% accuracy  
Figure 1. ADP122 with Fixed Output Voltage (TSOT Version)  
Up to 31 fixed-output voltage options available from  
1.75 V to 3.3 V  
V
= 2.3V TO 5.5V  
V
= 0.5V(1 + R1/R2)  
IN  
OUT  
Adjustable-output voltage range  
0.8 V to 5.0 V (ADP123)  
1
5
VIN  
VOUT  
C
1µF  
C
IN  
OUT  
1µF  
ADP123  
R1  
Excellent PSRR performance: 60 dB at 100 kHz  
Excellent load/line transient response  
Optimized for small 1.0 μF ceramic capacitors  
Current limit and thermal overload protection  
Logic controlled enable  
2
3
GND  
ON  
4
EN  
ADJ  
OFF  
R2  
Compact packages: 5-lead TSOT and 6-lead 2 mm × 2 mm LFCSP  
Figure 2. ADP123 with Adjustable Output Voltage (TSOT Version)  
APPLICATIONS  
VOUT = 1.8V  
VIN = 2.3V TO 5.5V  
1
6
VOUT  
NC  
VIN  
NC  
EN  
C1  
1µF  
C2  
1µF  
Digital camera and audio devices  
Portable and battery-powered equipment  
Automatic meter reading (AMR) meters  
GPS and location management units  
Medical instrumentation  
2
3
5
4
GND  
GND  
ON  
GND  
OFF  
GND  
ADP122  
TOP VIEW  
(Not to Scale)  
Point-of-sale equipment  
NC = NOT CONNECT. THIS PIN CAN BE LEFT FLOATING  
OR CONNECTED TO GROUND.  
GENERAL DESCRIPTION  
The ADP122/ADP123 are low quiescent current, low dropout  
linear regulators. They are designed to operate from an input  
voltage between 2.3 V and 5.5 V and to provide up to 300 mA of  
output current. The low 85 mV dropout voltage at a 300 mA load  
improves efficiency and allows operation over a wide input  
voltage range.  
Figure 3. ADP122 with Fixed Output Voltage (LFCSP Version)  
VOUT = 0.5V (1 + R1/R2)  
VIN = 2.3V TO 5.5V  
1
2
3
6
VOUT  
ADJ  
VIN  
NC  
EN  
C1  
1µF  
C2  
1µF  
R1  
5
4
GND  
GND  
R2  
ON  
GND  
GND  
OFF  
GND  
ADP123  
TOP VIEW  
(Not to Scale)  
The low 170 μA of quiescent current at full load makes the ADP122  
ideal for battery-operated portable equipment.  
NC = NOT CONNECT. THIS PIN CAN BE LEFT FLOATING  
OR CONNECTED TO GROUND.  
The ADP122 is capable of 31 fixed output voltages from 1.75 V  
to 3.3 V. The ADP123 is the adjustable version of the device and  
allows the output voltage to be set between 0.8 V and 5.0 V by  
an external voltage divider.  
Figure 4. ADP123 with Adjustable Output Voltage (LFCSP Version)  
The ADP122/ADP123 have an internal soft start that gives a  
constant start-up time of 350 µs. Short-circuit protection and  
thermal overload protection circuits prevent damage in adverse  
conditions. The ADP122/ADP123 are available in a tiny, 5-lead  
TSOT package and 6-lead LFCSP package for the smallest  
footprint solution to meet a variety of portable applications.  
The ADP122/ADP123 are specifically designed for stable operation  
with tiny 1 µF ceramic input and output capacitors to meet the  
requirements of high performance, space constrained applications.  
Rev. E  
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  
rightsof third parties that may result fromits use. Specifications subject to change without notice. No  
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.  
Trademarks andregisteredtrademarks are the property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
www.analog.com  
Fax: 781.461.3113 ©2009–2012 Analog Devices, Inc. All rights reserved.  
 
 
 
 
 
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