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LT3030

更新时间： 2024-09-13 12:25:43
品牌 Logo 应用领域
凌特 - Linear 稳压器
页数 文件大小 规格书
20页 584K
描述
Dual 750mA/250mA Low Dropout, Low Noise, Micropower Linear Regulator

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LT3030 数据手册

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LT3030  
Dual 750mA/250mA  
Low Dropout, Low Noise,  
Micropower Linear Regulator  
FeaTures  
DescripTion  
n
Output Current: 750mA/250mA  
TheLT®3030isadual,micropower,lownoise,lowdropout  
linear regulator. The device operates with either common  
or independent input supplies for each channel, over a  
1.8V to 20V input voltage range. Output 1/Output 2 supply  
750mA/250mArespectivelywithatypicaldropoutvoltage  
of 300mV. With an external 10nF bypass capacitor, output  
n
Low Dropout Voltage: 300mV  
Low Noise: 20μV  
n
(10Hz to 100kHz)  
RMS  
n
n
n
n
n
n
Low Quiescent Current: 120μA/75μA  
Wide Input Voltage Range: 1.8V to 20V  
Adjustable Output: 1.220V Reference Voltage  
Shutdown Quiescent Current: <1μA  
Stable with 10µF/3.3µF Minimum Output Capacitor  
Stable with Ceramic, Tantalum or Aluminum  
Electrolytic Capacitors  
noise is only 20μV  
over a 10Hz to 100kHz bandwidth.  
RMS  
Designed for use in battery-powered systems, the low  
120μA/75μA quiescent current makes it an ideal choice.  
In shutdown, quiescent current drops to less than 1μA.  
n
n
n
Precision Threshold for Shutdown Logic or UVLO Function Shutdown control is independent for each channel and  
PWRGD Flag for each Output  
Reverse Battery and Reverse Output-to-Input  
Protection  
Current Limit with Foldback and Thermal Shutdown  
Thermally Enhanced 20-Lead TSSOP and  
28-Lead (4mm × 5mm) QFN Packages  
its precision logic threshold allows for voltage lockout  
functionality. The LT3030 includes a PWRGD flag for each  
channel to indicate output regulation.  
n
n
TheLT3030optimizesstabilityandtransientresponsewith  
low ESR ceramic output capacitors, requiring a minimum  
of only 10μF/3.3μF.  
applicaTions  
Internal circuitry provides reverse-battery protection,  
reverse-current protection, current limiting with foldback  
and thermal shutdown with hysteresis. The adjustable  
output voltage device has a 1.220V reference voltage.  
The LT3030 is offered in the thermally enhanced 20-lead  
TSSOP and 28-lead, low profile (4mm × 5mm × 0.75mm)  
QFN packages.  
n
General Purpose Linear Regulator  
n
Battery-Powered Systems  
n
Microprocessor Core/Logic Supplies  
n
Post Regulator for Switching Supplies  
Tracking/Sequencing Power Supplies  
n
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property  
of their respective owners.  
Typical applicaTion  
2.5VIN to 1.8V/1.5V Application  
Dropout Voltage vs Load Current  
500  
V
IN  
2.5V  
V
OUT1  
T
= 25°C  
IN1  
OUT1  
J
1.8V  
450  
400  
350  
300  
250  
200  
150  
100  
50  
10nF  
10µF  
750mA  
3.3µF  
IN2  
LT3030  
113k  
1%  
SHDN1  
SHDN2  
BYP1  
ADJ1  
237k  
1%  
OUT2  
1M  
1M  
PWRGD1  
PWRGD2  
OUT1  
V
OUT2  
OUT2  
1.5V  
10nF  
3.3µF  
250mA  
54.9k  
1%  
BYP2  
ADJ2  
0
GND  
0
75 150 225 300 375 450 525 600 675 750  
237k  
1%  
3030 TA01a  
OUTPUT CURRENT (mA)  
3030 TA01b  
3030f  
1
For more information www.linear.com/3030  
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