IRU1050CD

更新时间： 2024-01-06 05:03:54

品牌	Logo	应用领域
英飞凌 - INFINEON		稳压器
页数	文件大小	规格书
12页	77K
描述
5A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR

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技术参数
数据手册

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IRU1050CD 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	SFM
包装说明：	TO-220,	针数：	3
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.82
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 V	JESD-30 代码：	R-PSFM-T3
JESD-609代码：	e3	功能数量：	1
端子数量：	3	工作温度TJ-Max：	150 °C
工作温度TJ-Min：		最大输出电流 1：	5 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-220
封装形状：	RECTANGULAR	封装形式：	FLANGE MOUNT
峰值回流温度（摄氏度）：	250	认证状态：	Not Qualified
调节器类型：	ADJUSTABLE POSITIVE SINGLE OUTPUT LDO REGULATOR	表面贴装：	NO
端子面层：	MATTE TIN OVER NICKEL	端子形式：	THROUGH-HOLE
端子位置：	SINGLE	处于峰值回流温度下的最长时间：	30
Base Number Matches：	1

IRU1050CD 数据手册

IRU1050

Assuming the following specifications:

Air Flow (LFM)

100 200

300

400

VIN = 5V

Thermalloy

AAVID

6021PB 6021PB 6073PB 6109PB 7141D

534202B 534202B 507302 575002 576802B

VOUT = 3.5V

IOUT(MAX) = 4.6A

TA = 358C

Note: For further information regarding the above com-

The steps for selecting a proper heat sink to keep the panies and their latest product offerings and application

junction temperature below 1358C is given as:

support contact your local representative or the num-

bers listed below:

1) Calculate the maximum power dissipation using:

AAVID.................PH# (603) 528 3400

Thermalloy...........PH# (214) 243-4321

PD = IOUT×(VIN - VOUT)

PD = 4.6×(5 - 3.5) = 6.9W

Designing for Microprocessor Applications

2) Select a package from the regulator data sheet and As it was mentioned before, the IRU1050 is designed

record its junction to case (or tab) thermal resistance. specifically to provide power for the new generation of

the low voltage processors requiring voltages in the range

Selecting TO-220 package gives us:

of 2.5V to 3.6V generated by stepping down the 5V sup-

ply. These processors demand a fast regulator that sup-

ports their large load current changes. The worst case

θJC = 2.78C/W

3) Assuming that the heat sink is black anodized, cal- current step seen by the regulator is anywhere in the

culate the maximum heat sink temperature allowed: range of 1 to 7A with the slew rate of 300 to 500ns which

could happen when the processor transitions from “Stop

Assume, θcs=0.05°C/W (heat-sink-to-case thermal Clock” mode to the “Full Active” mode. The load current

resistance for black anodized)

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

levels. Because of this requirement the selection of high

TS = TJ - PD×(θJC + θCS)

TS = 135 - 6.9×(27 + 0.05) = 1168C

4) With the maximum heat sink temperature calculated frequency low ESR and low ESL output capacitor is

in the previous step, the heat-sink-to-air thermal re- imperative in the design of these regulator circuits.

sistance (θSA) is calculated by first calculating the

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,

the ESR of the output capacitor produces an instanta-

neous drop equal to the (∆VESR=ESR×∆I) and the ESL

effect will be equal to the rate of change of the output

current times the inductance of the capacitor. (∆VESL

=L×∆I/∆t). The output capacitance effect is a droop in

∆T = TS - TA = 116 - 35 = 818C

DT = Temperature Rise Above Ambient

6.9

∆T

θSA =

= 11.78C/W

5) Next, a heat sink with lower θSA than the one calcu- the output voltage proportional to the time it takes for

lated in Step 4 must be selected. One way to do this the regulator to respond to the change in the current,

is to simply look at the graphs of the “Heat Sink Temp (∆Vc=∆t×∆I/C) where ∆t is the response time of the

Rise Above the Ambient” vs. the “Power Dissipation” regulator.

and select a heat sink that results in lower tempera-

ture rise than the one calculated in previous step.

The following heat sinks from AAVID and Thermalloy

meet this criteria.

Rev. 1.8

08/20/02

www.irf.com

1 2 3 456 7 8...12

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与IRU1050CD相关器件

型号	品牌	描述	获取价格	数据表
IRU1050CDPBF	INFINEON	Adjustable Positive LDO Regulator, 1.25V Min, 5.5V Max, 1.3V Dropout, PSSO2, PLASTIC, TO-2	获取价格
IRU1050CDTR	INFINEON	Adjustable Positive LDO Regulator, 1.25V Min, 5.5V Max, 1.3V Dropout, PSSO2, PLASTIC, TO-2	获取价格
IRU1050CM	INFINEON	5A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR	获取价格
IRU1050CMPBF	INFINEON	Adjustable Positive LDO Regulator, 1.25V Min, 5.5V Max, 1.3V Dropout, PSSO2, PLASTIC, TO-2	获取价格
IRU1050CMTR	INFINEON	Adjustable Positive LDO Regulator, 1.25V Min, 5.5V Max, 1.3V Dropout, PSSO2, PLASTIC, TO-2	获取价格
IRU1050CP	INFINEON	5A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR	获取价格

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