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LT3050

更新时间： 2023-12-20 18:44:55
品牌 Logo 应用领域
亚德诺 - ADI 稳压器
页数 文件大小 规格书
26页 399K
描述
具精准电流限值和诊断功能的 100mA、性稳压器

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中文翻译

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LT3050 数据手册

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LT3050 Series  
100mA, Linear Regulator  
with Precision Current Limit  
and Diagnostic Outputs  
DESCRIPTION  
FEATURES  
th  
The LT®3050 series are micro-power, low noise, low  
dropout voltage (LDO) linear regulators. The devices  
supply 100mA of output current with a dropout voltage of  
340mV. A 10nF bypass capacitor reduces output noise to  
n
Output Current Monitor: 1/100 of I  
OUT  
n
Fault Indicator: Current Limit, Minimum I  
or  
OUT  
Thermal Limit  
n
n
n
n
n
n
n
n
n
n
Output Current: 100mA  
Dropout Voltage: 340mV  
30μV  
in a 10Hz to 100kHz bandwidth and soft-starts  
RMS  
Input Voltage Range: 1.6V to 45V  
the reference. The LT3050’s 45V input voltage rating  
combined with its precision current limit and diagnostic  
functions make the IC an ideal choice for robust, high  
reliability applications.  
Programmable Precision Current Limit: 5ꢀ  
Programmable Minimum I  
Monitor  
(10Hz to 100kHz)  
OUT  
Low Noise: 30μV  
RMS  
Adjustable Output (V = V  
= 0.6V)  
REF  
OUT(MIN)  
AsingleresistorprogramstheLT3050’scurrentlimit,accurate  
to 5ꢀ over a wide input voltage and temperature range.  
A single resistor programs the LT3050’s minimum output  
currentmonitor,usefulfordetectingopen-circuitconditions.  
The current monitor function sources a current equal to  
1/100th of output current. A logic FAULT pin asserts low if  
the LT3050 is in current limit, operating below its minimum  
output current (open-circuit) or is in thermal shutdown.  
Fixed Output Voltages: 3.3V, 5V  
Output Tolerance: 2ꢀ Over Line, Load and Temperature  
Stable with Low ESR, Ceramic Output Capacitors  
(2.2μF minimum)  
n
n
Shutdown Current: <1μA  
Reverse-Battery, Reverse-Output and  
Reverse-Current Protection  
Thermal Limit Protection  
12-Lead 3mm × 2mm DFN and MSOP Packages  
n
n
The LT3050 optimizes stability and transient response  
with low ESR ceramic capacitors, requiring a minimum of  
2.2μF. The LT3050 is available in fixed output voltages of  
3.3V and 5V, and as an adjustable version with an output  
voltage range down to the 0.6V reference.The LT3050 is  
available in the thermally-enhanced 12-Lead 3mm × 2mm  
DFN and MSOP packages.  
APPLICATIONS  
n
Protected Antenna Supplies  
n
Automotive Telematics  
n
Industrial Applications (Trucks, Forklifts, etc.)  
High Reliability Applications  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
n
TYPICAL APPLICATION  
External Current Limit RIMAX = 1.15k  
105  
5V Supply with 100mA Precision Current Limit, 10mA IMIN  
V
OUT  
= 5V  
104  
103  
102  
101  
100  
99  
IN  
OUT  
5V  
12V  
IN  
SHDN  
2.2ꢁF  
V
= 15V  
1ꢁF  
120k  
IN  
V
FAULT  
V
V
= 12V  
LT3050-5  
IN  
IN  
I
MAX  
I
TO ꢁP ADC  
0.1ꢁF  
MON  
1.15k  
10nF  
= 5.6V  
98  
3k  
(THRESHOLD = 100mA)  
(ADC FULL SCALE = 3V)  
97  
I
REF/BYP  
96  
MIN  
11.3k  
0.1ꢁF  
GND  
95  
10nF  
(THRESHOLD = 10mA)  
–75 –50 –25  
0
–25 50 75 100 125 150 175  
3050 TA01  
TEMPERATURE (°C)  
3050 TA01a  
3050fa  
1
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