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LT3048 PDF预览

LT3048

更新时间: 2024-09-25 14:57:31
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
16页 1579K
描述
采用 2mm x 2mm DFN 封装的低噪声偏置发生器

LT3048 数据手册

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LT3048 Series  
Low Noise Bias Generator  
in 2mm × 2mm DFN  
FEATURES  
DESCRIPTION  
The LT®3048 series generate low noise, low ripple bias  
supplies from input voltages of 2.7V to 4.8V.  
n
Generates Low Noise Bias Voltage from Single  
Cell Li-Ion Battery  
Output Current: Up to 40mA  
n
The LT3048 includes a boost regulator and a LDO linear  
regulator. The boost regulator provides power to the  
linear regulator.  
n
Low Output Ripple and Noise: <500µV  
Boost Regulator  
P-P  
n
n
1MHz Operation (LT3048)  
The boost regulator output voltage is regulated to 1.1V  
abovetheLDOoutput, optimizingLDOripplerejectionand  
transientresponse. Fixedfrequencyoperationandcurrent  
mode control allow the use of very small inductors and  
results in low, predictable output ripple.  
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2.2MHz Operation (LT3048-XX)  
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Integrated Schottky Diode  
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Low Dropout Linear Regulator  
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1.235V Feedback Voltage (LT3048)  
Low Noise: <120µV  
0.1% Load Regulation  
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(10Hz to 100kHz)  
RMS  
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The linear regulator in the LT3048 generates a program-  
mable output and the LT3048-XX generate fixed output  
voltages. High power supply ripple rejection combined  
with a low noise internal reference results in less than  
n
n
n
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Fixed 3.3V, 5V, 12V, 15V and Adjustable Output Options  
Short-Circuit and Thermal Protection  
Load Disconnect in Shutdown  
500µV output ripple and noise.  
Available in 2mm × 2mm DFN Package  
P-P  
The LT3048 is available in a 8-lead 2mm × 2mm DFN  
package.  
APPLICATIONS  
All registered trademarks and trademarks are the property of their respective owners.  
n
Sensor Bias  
n
Op Amp Supply  
TYPICAL APPLICATION  
Efficiency  
ꢎꢊꢐꢑ  
ꢇꢈ  
80  
ꢚꢘꢙꢒ ꢁꢂ ꢋꢘꢌꢒ  
70  
60  
50  
ꢋꢘꢙꢐꢕ  
ꢀꢄ  
Bꢀꢁꢂꢃꢁ  
ꢅꢆꢂꢇꢈ  
ꢇꢈ  
ꢎꢐꢕ  
ꢉꢊꢋꢌꢍꢎꢏ  
ꢂꢃꢁ  
ꢎꢏꢒ  
ꢅꢆꢂꢂꢃꢁ  
40  
ꢎꢐꢕ  
ꢎꢔꢕ  
V
(V) I  
(mA)  
ꢎꢟ  
ꢚꢚ  
ꢚꢋ  
IN  
OUT  
ꢂꢕꢕ ꢂꢈ  
ꢓꢈ  
Bꢛꢜ  
30  
20  
10  
0
LDOOUT = 15V  
L = 10µH  
DCR = 650mΩ  
ꢚꢘꢙ  
ꢉꢘꢉ  
ꢉꢘꢞ  
ꢝꢈꢆ  
ꢉꢊꢋꢌ ꢁꢖꢊꢎꢗ  
V
V
V
= 2.7V  
= 3.3V  
= 3.6V  
IN  
IN  
IN  
5
10  
LOAD CURRENT (mA)  
20  
0
25  
15  
3048 TA01b  
Rev B  
1
For more information www.analog.com  

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