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AME1117BCGTZ PDF预览

AME1117BCGTZ

更新时间: 2024-02-14 04:01:53
品牌 Logo 应用领域
安茂微 - AME 稳压器电源电路
页数 文件大小 规格书
19页 161K
描述
1A Low Dropout Positive Voltage Regulator

AME1117BCGTZ 技术参数

是否Rohs认证: 不符合生命周期:Contact Manufacturer
包装说明:, SOT-223Reach Compliance Code:compliant
风险等级:5.67可调性:FIXED
标称回动电压 1:1.2 V最大绝对输入电压:18 V
最大电网调整率:0.0036%最大负载调整率:0.018%
输出次数:1端子数量:3
工作温度TJ-Max:70 °C工作温度TJ-Min:
最大输出电流 1:1 A标称输出电压 1:1.8 V
封装主体材料:PLASTIC/EPOXY封装等效代码:SOT-223
认证状态:Not Qualified子类别:Other Regulators
表面贴装:YES技术:BIPOLAR
最大电压容差:2%Base Number Matches:1

AME1117BCGTZ 数据手册

 浏览型号AME1117BCGTZ的Datasheet PDF文件第7页浏览型号AME1117BCGTZ的Datasheet PDF文件第8页浏览型号AME1117BCGTZ的Datasheet PDF文件第9页浏览型号AME1117BCGTZ的Datasheet PDF文件第11页浏览型号AME1117BCGTZ的Datasheet PDF文件第12页浏览型号AME1117BCGTZ的Datasheet PDF文件第13页 
AME, Inc.  
1A Low Dropout  
Positive Voltage Regulator  
AME1117  
nApplication Description  
1. Output Voltage Adjustment  
3. Current Limit Protection  
Like most regulators, the AME1117 regulates the out-  
put by comparing the output voltage to an internally gen-  
erated reference voltage. On the adjustable version, the  
VREF is available externally as 1.25V between VOUT and  
ADJ. The voltage ratio formed by R1 and R2 should be  
set to conduct 10mA (minimum output load). The output  
voltage is given by the following equation:  
AME1117 is protected against overload conditions. Cur-  
rent protection is triggered at typically 1.5A.  
4. Stability and Load Regulation  
AME1117 requires a capacitor from VOUT toGND to pro-  
vide compensation feedback to the internal gain stage.  
This is to ensure stability at the output terminal. Typi-  
cally, a 10mF tantalum or 50mF aluminum electrolytic is  
sufficient.  
R2  
VOUT = VREF ( 1 +  
) + IADJ x R2  
R1  
On fixed versions of AME1117, the voltage divider is  
provided internally.  
(Note: It is important that the ESR for this capacitor does not ex-  
ceed 0.5W.)  
The output capacitor does not have a theoretical upper  
limit and increasing its value will increase stability. COUT  
= 100mF or more is typical for high current regulator de-  
sign.  
VIN  
VOUT  
IN  
OUT  
ADJ  
VREF  
R1  
C1  
For the adjustable version, the best load regulation is  
accomplished when the top of the resistor divider (R1) is  
connected directly to the output pin of the AME1117.  
When so connected, RP is not multiplied by the divider  
ratio.  
IADJ  
55mA  
R2  
For fixed output versions, the top of R1 is internally  
connected to the output. The ground pin can be connected  
to the low side of the load in order to eliminate ground  
loop errors.  
R2  
R1  
) + IADJ x R2  
VOUT = VREF (1+  
2. Thermal Protection  
RP  
Parasitic  
Line Resistance  
AME1117 has thermal protection which limits junction  
temperature to 150oC. However, device functionality is  
only guaranteed to a maximum junction temperature of  
+125oC.  
VIN  
IN  
OUT  
ADJ  
R1  
(Connect R1 to case)  
RL  
The power dissipation and junction temperature for  
AME1117 is given by  
R2  
PD = (VIN - VOUT) x IOUT  
TJUNCTION = TAMBIENT + ( PD x qJA)  
Note: TJUNCTION must not exceed 125oC  
Connect  
R2 to load  
Rev.S.02  
10  

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