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ADP1720ARMZ-R7

更新时间： 2024-11-26 12:32:59
品牌 Logo 应用领域
亚德诺 - ADI 稳压器
页数 文件大小 规格书
16页 369K
描述
50 mA, High Voltage, Micropower Linear Regulator

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ADP1720ARMZ-R7 数据手册

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50 mA, High Voltage,  
Micropower Linear Regulator  
ADP1720  
TYPICAL APPLICATION CIRCUITS  
FEATURES  
Wide input voltage range: 4 V to 28 V  
Maximum output current: 50 mA  
Low light load current:  
28 μA at 0 μA load  
35 μA at 100 μA load  
ADP1720  
FIXED  
1
2
3
4
8
7
6
5
GND  
IN  
GND  
GND  
GND  
GND  
V
= 28V  
IN  
1µF  
OUT  
EN  
V
= 5V  
OUT  
Low shutdown current: 0.7 μA  
1µF  
Low dropout voltage: 275 mV @ 50 mA load  
Initial accuracy: 0.5ꢀ  
Figure 1. ADP1720 with Fixed Output Voltage, 5.0 V  
Accuracy over line, load, and temperature: 2ꢀ  
Stable with small 1μF ceramic output capacitor  
Fixed 3.3 V and 5.0V output voltage options  
Adjustable output voltage option: 1.225 V to 5.0 V  
Current limit and thermal overload protection  
Logic controlled enable  
ADP1720  
R2  
R1  
ADJUSTABLE  
1
2
3
4
8
7
6
5
ADJ  
IN  
GND  
GND  
GND  
GND  
V
= 12V  
IN  
1µF  
OUT  
EN  
V
=
OUT  
Space-saving thermally enhanced MSOP package  
1.225V(1 + R1/R2)  
1µF  
APPLICATIONS  
Figure 2. ADP1720 with Adjustable Output Voltage, 1.225 V to 5.0 V  
DC-to-DC post regulation  
PCMCIA regulation  
Keep-alive power in portable equipment  
Industrial applications  
GENERAL DESCRIPTION  
The ADP1720 is a high voltage, micropower, low dropout linear  
regulator. Operating over a very wide input voltage range of 4 V  
to 28 V, the ADP1720 can provide up to 50 mA of output current.  
With just 28 μA of quiescent supply current and a micropower  
shutdown mode, this device is ideal for applications that require  
low quiescent current.  
The ADP1720 is optimized for stable operation with small 1 μF  
ceramic output capacitors, allowing for good transient perform-  
ance while occupying minimal board space.  
The ADP1720 operates from –40°C to +125°C and uses current  
limit protection and thermal overload protection circuits to  
prevent damage to the device in adverse conditions.  
The ADP1720 is available in fixed output voltages of 3.3 V and  
5.0 V. An adjustable version is also available, which allows the  
output to be set anywhere between 1.225 V and 5.0 V. An enable  
function that allows external circuits to turn on and turn off the  
ADP1720 output is available. For automatic startup, the enable  
(EN) pin can be connected directly to the input rail.  
Available in a small thermally enhanced MSOP package, the  
ADP1720 provides a compact solution with low thermal resistance.  
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 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  
©2007 Analog Devices, Inc. All rights reserved.  
 
 
 
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