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ADP125

更新时间： 2024-11-23 06:36:23
品牌 Logo 应用领域
亚德诺 - ADI 稳压器
页数 文件大小 规格书
20页 678K
描述
5.5 V Input, 500 mA, Low Quiescent Current, CMOS Linear Regulators

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ADP125 数据手册

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5.5 V Input, 500 mA, Low Quiescent  
Current, CMOS Linear Regulators  
ADP124/ADP125  
TYPICAL APPLICATION CIRCUITS  
FEATURES  
Input voltage supply range: 2.3 V to 5.5 V  
500 mA maximum output current  
Fixed and adjustable output voltage versions  
1% initial accuracy  
Up to 31 fixed-output voltage options available  
from 1.75 V to 3.3 V  
1
2
3
4
8
7
6
5
VOUT  
VIN  
V
= 3.3V  
V
= 5.5V  
OUT  
IN  
ADP124  
VOUT  
VIN  
C2  
C1  
VOUT  
SENSE  
NC  
EN  
ON  
GND  
OFF  
Adjustable-output voltage range from 0.8 V to 5.0 V  
Very low dropout voltage: 130 mV  
Low quiescent current: 45 μA  
Figure 1. ADP124 with Fixed Output Voltage  
V
OUT  
= 3.3V  
Low shutdown current: <1 μA  
1
2
3
4
8
7
6
5
VOUT  
VIN  
V
= 5.5V  
C1  
IN  
Excellent PSRR performance: 60 dB at 100 kHz  
Excellent load/line transient response  
Optimized for small 1.0 ꢀF ceramic capacitors  
Current limit and thermal overload protection  
Logic controlled enable  
ADP125  
VOUT  
VIN  
C2  
R1  
R2  
NC  
EN  
ADJ  
ON  
GND  
OFF  
Compact 8-lead exposed paddle MSOP package  
Figure 2. ADP 125 with Adjustable Output Voltage  
APPLICATIONS  
Digital camera and audio devices  
Portable and battery-powered equipment  
Automatic meter reading (AMR) meters  
GPS and location management units  
Medical instrumentation  
Point of load power  
GENERAL DESCRIPTION  
The ADP124/ADP125 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 500 mA of  
output current. The low 130 mV dropout voltage at a 500 mA  
load improves efficiency and allows operation over a wide input  
voltage range.  
The ADP124/ADP125 are specifically designed for stable operation  
with tiny 1 ꢀF ceramic input and output capacitors to meet the  
requirements of high performance, space constrained applications.  
The ADP124/ADP125 have an internal soft start that gives a  
constant start-up time of 350 ꢀs. Short-circuit protection and  
thermal overload protection circuits prevent damage in adverse  
conditions. The ADP124/ADP125 are available in an 8-lead  
exposed paddle MSOP package. When compared with the  
standard MSOP package, the exposed paddle MSOP package  
has lower thermal resistance (θJA). The lower thermal resistance  
package allows the ADP124/ADP125 to meet the needs of a  
variety of portable applications while minimizing the rise in  
junction temperature.  
The low 210 μA of quiescent current with a 500 mA load makes the  
ADP124/ADP125 ideal for battery-operated portable equipment.  
The ADP124 is capable of 31 fixed-output voltages from 1.75 V  
to 3.3 V. The ADP125 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.  
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 that may result from its 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 and registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.461.3113  
www.analog.com  
©2009 Analog Devices, Inc. All rights reserved.  
 
 
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