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IRU1030CDTR PDF预览

IRU1030CDTR

更新时间： 2024-02-08 02:53:11
品牌 Logo 应用领域
英飞凌 - INFINEON 输出元件调节器
页数 文件大小 规格书
11页 67K
描述
Adjustable Positive LDO Regulator, 1.25V Min, 5.5V Max, 1.3V Dropout, PSSO2, PLASTIC, TO-252, DPAK-3

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IRU1030CDTR 技术参数

生命周期：Obsolete零件包装代码：TO-252
包装说明：TO-252,针数：3
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.68
最大回动电压 1：1.3 V最大差分输入-输出电压：7 V
最小差分输入-输出电压：1.3 VJESD-30 代码：R-PSSO-G2
长度：6.604 mm功能数量：1
端子数量：2工作温度TJ-Max：150 °C
工作温度TJ-Min：最大输出电流 1：3 A
最大输出电压 1：5.5 V最小输出电压 1：1.25 V
封装主体材料：PLASTIC/EPOXY封装代码：TO-252
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
认证状态：Not Qualified调节器类型：ADJUSTABLE POSITIVE SINGLE OUTPUT LDO REGULATOR
座面最大高度：2.49 mm表面贴装：YES
端子形式：GULL WING端子节距：2.3 mm
端子位置：SINGLE宽度：6.096 mm
Base Number Matches：1

IRU1030CDTR 数据手册

 浏览型号IRU1030CDTR的Datasheet PDF文件第2页浏览型号IRU1030CDTR的Datasheet PDF文件第3页浏览型号IRU1030CDTR的Datasheet PDF文件第4页浏览型号IRU1030CDTR的Datasheet PDF文件第6页浏览型号IRU1030CDTR的Datasheet PDF文件第7页浏览型号IRU1030CDTR的Datasheet PDF文件第8页 
IRU1030  
Assuming the following specifications:  
Air Flow (LFM)  
0
100  
Thermalloy 6109PB 6110PB  
AAVID  
200  
300  
VIN = 3.3V  
VOUT = 1.5V  
IOUT(MAX) = 2.7A  
TA = 358C  
7141  
7178  
575002 507302 576802B 577102  
The steps for selecting a proper heat sink to keep the Note: For further information regarding the above com-  
junction temperature below 135°C is given as:  
panies and their latest product offerings and application  
support contact your local representative or the num-  
bers listed below:  
1) Calculate the maximum power dissipation using:  
PD = IOUT×(VIN - VOUT)  
AAVID................PH# (603) 528 3400  
Thermalloy..........PH# (214) 243-4321  
PD = 2.7×(3.3 - 1.5) = 4.86W  
2) Select a package from the regulator data sheet and Designing for Microprocessor Applications  
record its junction to case (or tab) thermal resistance. As it was mentioned before the IRU1030 is designed  
specifically to provide power for the new generation of  
Selecting TO-220 package gives us:  
the low voltage processors requiring voltages in the range  
of 2.5V to 3.6V generated by stepping down the 5V  
supply. These processors demand a fast regulator that  
θJC = 2.78C/W  
3) Assuming that the heat sink is black anodized, cal- supports their large load current changes. The worst case  
culate the maximum heat sink temperature allowed: current step seen by the regulator is anywhere in the  
range of 1 to 7A with the slew rate of 300 to 500ns which  
Assume, θcs=0.05°C/W (heat-sink-to-case thermal could happen when the processor transitions from “Stop  
resistance for black anodized)  
Clock” mode to the “Full Active” mode. The load current  
step at the processor is actually much faster, in the or-  
der of 15 to 20ns, however the decoupling capacitors  
placed in the cavity of the processor socket handle this  
transition until the regulator responds to the load current  
TS = TJ - PD×(θJC + θCS)  
TS = 135 - 4.86×(2.7 + 0.05) = 121.78C  
4) With the maximum heat sink temperature calculated levels. Because of this requirement the selection of high  
in the previous step, the heat-sink-to-air thermal re- frequency low ESR and low ESL output capacitors is  
sistance (θSA) is calculated by first calculating the imperative in the design of these regulator circuits.  
temperature rise above the ambient as follows:  
Figure 5 shows the effects of a fast transient on the  
output voltage of the regulator. As shown in this figure,  
∆T = TS - TA = 121.7 - 35 = 86.78C  
DT=Temperature Rise Above Ambient  
∆T 86.7  
the ESR of the output capacitor produces an instanta-  
neous drop equal to the (DVESR=ESR×DI) and the ESL  
effect will be equal to the rate of change of the output  
current times the inductance of the capacitor. (DVESL  
θSA =  
=
= 17.88C/W  
PD  
4.86  
5) Next, a heat sink with lower θSA than the one calcu- =L×DI/Dt). The output capacitance effect is a droop in  
lated in step 4 must be selected. One way to do this the output voltage proportional to the time it takes for the  
is to simply look at the graphs of the “Heat Sink Temp regulator to respond to the change in the current,  
Rise Above the Ambient” vs. the “Power Dissipation” (DVc=Dt×DI/C) where Dt is the response time of the  
and select a heat sink that results in lower tempera- regulator.  
ture rise than the one calculated in the previous step.  
The following heat sinks from AAVID and Thermalloy  
meet this criteria.  
Rev. 1.3  
08/20/02  
www.irf.com  
5
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