IRU1176CP

更新时间： 2024-02-24 17:19:21

品牌	Logo	应用领域
英飞凌 - INFINEON		线性稳压器IC 调节器电源电路输出元件输入元件
页数	文件大小	规格书
6页	48K
描述
7.5A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR WITH SHUTDOWN INPUT

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技术参数
数据手册

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IRU1176CP 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	MODULE	包装说明：	,
针数：	7	Reach Compliance Code：	unknown
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.19	JESD-30 代码：	R-PSSO-G7
JESD-609代码：	e0	长度：	9.395 mm
功能数量：	1	端子数量：	7
工作温度TJ-Max：	125 °C	工作温度TJ-Min：
最大输出电流 1：	7.5 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
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE
峰值回流温度（摄氏度）：	225	认证状态：	Not Qualified
调节器类型：	ADJUSTABLE POSITIVE SINGLE OUTPUT LDO REGULATOR	座面最大高度：	2.28 mm
表面贴装：	YES	技术：	BIPOLAR
端子面层：	TIN LEAD	端子形式：	GULL WING
端子节距：	1.27 mm	端子位置：	SINGLE
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	8 mm
Base Number Matches：	1

IRU1176CP 数据手册

IRU1176

The IRU1176 keeps a constant 1.25V between the VSENSE Panasonic FA series as well as the Nichicon PL series

pin and the VADJ pin. By placing a resistor R1 across insures both stability and good transient response.

these two pins and connecting the VSENSE and VOUT pin

together, a constant current flows through R1, adding to Shutdown Operation

the IADJ current and into the R2 resistor producing a volt- The IRU1176 can be disabled by pulling the SD pin low

age equal to the (1.25/R1)×R2 + IADJ×R2. This voltage using an open collector device such as a low cost 2N3904

is then added to the 1.25V to set the output voltage. general purpose transistor as shown in the application

This is summarized in the above equation. Since the circuit. The current sink of the pin is equal to:

minimum load current requirement of the IRU1176 is

10mA, R1 is typically selected to be a 121Ω resistor so

that it automatically satisfies this condition. Notice that

(VCTRL - 1.4)

ISINK =

Where: R = 50KΩ Typically

since the Iadj is typically in the range of 50µA it adds a Thermal Design

small error to the output voltage and should be consid- The IRU1176 incorporates an internal thermal shutdown

ered when very precise output voltage setting is required. that protects the device when the junction temperature

exceeds the allowable maximum junction temperature.

Load Regulation

Although this device can operate with junction tempera-

Since the IRU1176 has separate pins for the output (VOUT) tures in the range of 150°C, it is recommended that the

and the sense (VSENSE), it is ideal for providing true re- selected heat sink be chosen such that during maxi-

mote sensing of the output voltage at the load. This mum continuous load operation the junction tempera-

means that the voltage drops due to parasitic resistance ture is kept below this number. The example below

such as PCB traces between the regulator and the load shows the steps in selecting the proper surface mount

are compensated for using remote sensing. Figure 4 package.

shows a typical application of the IRU1176 with remote

sensing.

Assuming, the following conditions:

VOUT = 2.7V

VIN = 3.3V

VIN

V IN

VOUT

VCTRL = 5V

IOUT = 2A (DC Avg)

IRU1176

VCTRL

VSENSE

Adj

Calculate the maximum power dissipation using the fol-

lowing equation:

R 1

R 2

PD = IOUT × (VIN - VOUT) +o ^IOUTp × (VCTRL - VOUT)

PD = 2 × (3.3 - 2.7) +o p × (5 - 2.7) = 1.28W

Figure 4 - Schematic showing connection

for best load regulation.

Using table below select the proper package and the

amount of copper board needed.

Stability

The IRU1176 requires the use of an output capacitor as Pkg

part of the frequency compensation in order to make the

Copper

Area

qJA(°C/W)

Max Pd

(TA=25°C)

4.4W

3.7W

3.1W

Max Pd

(TA=45°C)

3.6W

3.0W

2.6W

regulator stable. Typical designs for the microproces- M or P 1.4"X1.4"

sor applications use standard electrolytic capacitors with M or P 1.0"X1.0"

typical ESR in the range of 50 to 100mΩ and an output M or P 0.7"X0.7"

capacitance of 500 to 1000µF. Fortunately as the ca- M or P Pad Size

pacitance increases, the ESR decreases resulting in a

2.4W

2.0W

fixed RC time constant. The IRU1176 takes advantage Note: Above table is based on the maximum junction

of this phenomena in making the overall regulator loop temperature of 1358C.

stable.

As shown in the above table, any of the two packages

For most applications a minimum of 100µF aluminum will do the job. For lower cost applications the Ultra Thin-

electrolytic capacitor such as Sanyo, MVGX series, Pak package is recommended.

Rev. 1.4

03/18/02

www.irf.com

1 2 3 456

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与IRU1176CP相关器件

型号	品牌	描述	获取价格	数据表
IRU1176CPPBF	INFINEON	暂无描述	获取价格
IRU1176CPTR	INFINEON	Adjustable Positive LDO Regulator, 1.25V Min, 5.5V Max, BIPolar, PSSO7, PLASTIC, ULTRA THI	获取价格
IRU1205	INFINEON	300mA ULTRA LOW DROPOUT POSITIVE ADJUSTABLE AND FIXED REGULATORS	获取价格
IRU1205-18	INFINEON	300mA ULTRA LOW DROPOUT POSITIVE ADJUSTABLE AND FIXED REGULATORS	获取价格
IRU1205-18CL	INFINEON	300mA ULTRA LOW DROPOUT POSITIVE ADJUSTABLE AND FIXED REGULATORS	获取价格
IRU1205-18CLPBF	INFINEON	Fixed Positive LDO Regulator, 1.8V, 0.4V Dropout, BIPolar, PDSO5, LEAD FREE, SOT-23, 5 PIN	获取价格

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