IRU1050CD

更新时间： 2024-02-19 01:30:12

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

Output Voltage Setting

regulator and the load is gained up by the factor of (1+R2/

The IRU1050 can be programmed to any voltages in the R1), or the effective resistance will be RP(eff)=RP×(1+R2/

range of 1.25V to 5.5V with the addition of R1 and R2 R1). It is important to note that for high current applica-

external resistors according to the following formula:

tions, this can represent a significant percentage of the

overall load regulation and one must keep the path from

the regulator to the load as short as possible to mini-

mize this effect.

VOUT = VREF× 1+

+IADJ×R2

( )

Where:

PARASITIC LINE

RESISTANCE

VREF = 1.25V Typically

IADJ = 50µA Typically

VIN

Vin

VOUT

R1 and R2 as shown in Figure 3:

IRU1050

VOUT

VIN

VOUT

Adj

IRU1050

Adj

VREF

R 1

R 2

IADJ = 50uA

Figure 4 - Schematic showing connection

for best load regulation.

Figure 3 - Typical application of the IRU1050

for programming the output voltage.

Stability

The IRU1050 keeps a constant 1.25V between the out- The IRU1050 requires the use of an output capacitor as

put pin and the adjust pin. By placing a resistor R1 across part of the frequency compensation in order to make the

these two pins a constant current flows through R1, add- regulator stable. Typical designs for microprocessor ap-

ing to the IADJ current and into the R2 resistor producing plications use standard electrolytic capacitors with a

a voltage equal to the (1.25/R1)×R2 + IADJ×R2 which typical ESR in the range of 50 to 100mΩ and an output

will be added to the 1.25V to set the output voltage. capacitance of 500 to 1000µF. Fortunately as the ca-

This is summarized in the above equation. Since the pacitance increases, the ESR decreases resulting in a

minimum load current requirement of the IRU1050 is fixed RC time constant. The IRU1050 takes advantage

10mA, R1 is typically selected to be 121Ω resistor so of this phenomena in making the overall regulator loop

that it automatically satisfies the minimum current re- stable. For most applications a minimum of 100µF alu-

quirement. Notice that since IADJ is typically in the range minum electrolytic capacitor such as Sanyo MVGX se-

of 50µA it only adds a small error to the output voltage ries, Panasonic FA series as well as the Nichicon PL

and should only be considered when a very precise out- series insures both stability and good transient response.

put voltage setting is required. For example, in a typical

3.3V application where R1=121Ω and R2=200Ω the er- Thermal Design

ror due to IADJ is only 0.3% of the nominal set point.

The IRU1050 incorporates an internal thermal shutdown

that protects the device when the junction temperature

exceeds the maximum allowable junction temperature.

Load Regulation

Since the IRU1050 is only a three-terminal device, it is Although this device can operate with junction tempera-

not possible to provide true remote sensing of the output tures in the range of 1508C, it is recommended that the

voltage at the load. Figure 4 shows that the best load selected heat sink be chosen such that during maxi-

regulation is achieved when the bottom side of R2 is mum continuous load operation the junction tempera-

connected to the load and the top side of R1 resistor is ture is kept below this number. The example below shows

connected directly to the case or the VOUT pin of the the steps in selecting the proper regulator heat sink for

regulator and not to the load. In fact, if R1 is connected the worst case current consumption using Intel 200MHz

to the load side, the effective resistance between the microprocessor as the load.

Rev. 1.8

08/20/02

www.irf.com

1 2 345 6 7...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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