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LT1963AEST-3.3TR PDF预览

LT1963AEST-3.3TR

更新时间： 2024-11-24 05:43:27
品牌 Logo 应用领域
凌特 - Linear 稳压器
页数 文件大小 规格书
28页 768K
描述
1.5A, Low Noise,Fast Transient Response LDO Regulators

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LT1963AEST-3.3TR 数据手册

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LT1963A Series  
1.5A, Low Noise,  
Fast Transient Response  
LDO Regulators  
FEATURES  
DESCRIPTION  
TheLT®1963Aseriesarelowdropoutregulatorsoptimized  
for fast transient response. The devices are capable of  
supplying 1.5A of output current with a dropout voltage of  
340mV. Operating quiescent current is 1mA, dropping to  
<1μA in shutdown. Quiescent current is well controlled; it  
does not rise in dropout as it does with many other regula-  
tors. In addition to fast transient response, the LT1963A  
regulators have very low output noise which makes them  
ideal for sensitive RF supply applications.  
n
Optimized for Fast Transient Response  
n
Output Current: 1.5A  
n
Dropout Voltage: 340mV  
n
Low Noise: 40μV  
(10Hz to 100kHz)  
RMS  
n
n
n
n
n
n
n
n
n
n
n
n
1mA Quiescent Current  
No Protection Diodes Needed  
Controlled Quiescent Current in Dropout  
Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 3.3V  
Adjustable Output from 1.21V to 20V  
<1μA Quiescent Current in Shutdown  
Stable with 10μF Output Capacitor*  
Stable with Ceramic Capacitors*  
Reverse Battery Protection  
Output voltage range is from 1.21V to 20V. The LT1963A  
regulators are stable with output capacitors as low as  
10μF.Internalprotectioncircuitryincludesreversebattery  
protection, current limiting, thermal limiting and reverse  
currentprotection.Thedevicesareavailableinfixedoutput  
voltages of 1.5V, 1.8V, 2.5V, 3.3V and as an adjustable  
devicewitha1.21Vreferencevoltage.TheLT1963Aregula-  
tors are available in 5-lead TO-220, DD, 3-lead SOT-223,  
8-lead SO and 16-lead TSSOP packages.  
No Reverse Current  
Thermal Limiting  
5-Lead TO-220, DD, 3-Lead SOT-223 and  
8-Lead SO Packages  
APPLICATIONS  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners. Protected by U.S. Patents,  
including 6118263, 6144250.  
n
3.3V to 2.5V Logic Power Supplies  
n
*See Applications Information Section.  
Post Regulator for Switching Supplies  
TYPICAL APPLICATION  
Dropout Voltage  
400  
3.3V to 2.5V Regulator  
350  
300  
250  
200  
150  
100  
50  
2.5V  
1.5A  
IN  
OUT  
+
+
V
> 3V  
10μF*  
10μF*  
IN  
LT1963A-2.5  
SHDN SENSE  
GND  
*TANTALUM,  
CERAMIC OR  
ALUMINUM ELECTROLYTIC  
1963A TA01  
0
0.8 1.0  
0
0.2 0.4 0.6  
1.2 1.4 1.6  
OUTPUT CURRENT (A)  
1963A TA02  
1963afd  
1
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