Datasheet > MSK5209-HZU

MSK5209-HZU

更新时间： 2023-01-03 10:46:23

品牌	Logo	应用领域
MSK		/
页数	文件大小	规格书
5页	135K
描述
Fixed Mixed LDO Regulator, 2 Output, 10V1, -10V2, Z PACK, BENT UP, 5 PIN

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

MSK5209-HZU 数据手册

APPLICATION NOTES

BYPASS CAPACITORS:

OVERLOAD SHUTDOWN:

For most applications a 47uF, tantalum capacitor should be

attached as close to the regulator's output as possible. This

will effectively lower the regulator's output impedance, improve

transient response and eliminate any oscillations that may be

normally associated with low dropout regulators. Additional

bypass capacitors can be used at the remote load locations to

further improve regulation. These can be either of the tantalum

or the electrolytic variety. Unless the regulator is located very

close to the power supply filter capacitor(s), a 4.7uF minimum

tantalum capacitor should also be added to the regulator's in-

put. An electrolytic may also be substituted if desired. When

substituting electrolytic in place of tantalum capacitors, a good

rule of thumb to follow is to increase the size of the electrolytic

by a factor of 10 over the tantalum value.

The regulators feature both current and thermal overload

protection. When the maximum power dissipation is not ex-

ceeded, the regulators will current limit slightly above their 3

amp rating. As the Vin-Vout voltage increases, however, shut-

down occurs in relation to the maximum power dissipation curve.

If the device heats enough to exceed its rated die junction tem-

perature due to excessive ambient temperature, improper heat

sinking etc., the regulators also shutdown until an appropriate

junction temperature is maintained. It should also be noted

that in the case of an extreme overload, such as a sustained

direct short, the device may not be able to recover. In these

instances, the device must be shut off and power reapplied to

eliminate the shutdown condition.

HEAT SINKING:

To determine if a heat sink is required for your application

and if so, what type, refer to the thermal model and governing

equation below.

LOAD REGULATION:

For best results the ground pin should be connected directly

to the load as shown below. This effectively reduces the ground

loop effect and eliminates excessive voltage drop in the sense

leg. It is also important to keep the output connection between

the regulator and the load as short as possible since this di-

rectly affects the load regulation. If 20 gauge wire were used

as an example, which has a resistance of about .008 ohms per

foot, this would result in a drop of 8mV/ft at 1Amp of load

current. It is also important to follow the capacitor selection

guidelines to achieve best performance. Refer to Figure 2 for

connection diagram.

Governing Equation: Tj = Pd x (R^θjc + Rθcs + Rθsa) + Ta

WHERE

Tj = Junction Temperature

Pd = Total Power Dissipation

R^θj = Junction to Case Thermal Resistance

Rθcs = Case to Heat Sink Thermal Resistance

R^θsa = Heat Sink to Ambient Thermal Resistance

Tc = Case Temperature

Ta = Ambient Temperature

Ts = Heat Sink Temperature

MSK 5202 TYPICAL APPLICATION:

Low Dropout Positive and Negative Power Supply

EXAMPLE:

This example demonstrates an analysis where each regulator is

at one-half of its maximum rated power dissipation, which oc-

curs when the output currents are at 1.5 amps each. The nega-

tive regulator is worst case due to the larger thermal resis-

tance.

Conditions for MSK 5202:

Vin = ±7.0V; Iout = ±1.5A

1.) Assume 45° heat spreading model.

2.) Find regulator power dissipation:

FIGURE 1

Pd = (Vin - Vout)(Iout)

Pd = (7-5)(1.5)

Pd = 3.0W

Avoiding Ground Loops

3.) For conservative design, set Tj = +125°C Max.

4.) For this example, worst case Ta = +90°C.

5.) R^θjc = 4.7°C/W from the Electrical Specification Table.

6.) Rθcs = 0.15°C/W for most thermal greases.

7.) Rearrange governing equation to solve for Rθsa:

Rθsa= ((Tj - Ta)/Pd) - (Rθjc) - (Rθcs)

= (125°C - 90°C)/3.0W - (4.7°C/W) - ( 0.15°C/W)

= 6.8°C/W

The same exercise must be performed for the negative regula-

tor. In this case the result is 6.82°C/W. Therefore, a heat sink

with a thermal resistance of no more than 6.8°C/W must be

used in this application to maintain both regulator circuit junc-

tion temperatures under 125°C.

FIGURE 2

Rev. H 12/10

1 234 5

中文翻译

下载PDF

与MSK5209-HZU相关器件

型号	品牌	获取价格	描述	数据表
MSK5209-TD	MSK	获取价格	Fixed Mixed LDO Regulator, 2 Output, 10V1, -10V2, TOP TAB, BENT DOWN, 5 PIN
MSK5209-TU	MSK	获取价格	Fixed Mixed LDO Regulator, 2 Output, 10V1, -10V2, TOP TAB, BENT UP, 5 PIN
MSK5209ZD	MSK	获取价格	DUAL OUTPUT, FIXED MIXED LDO REGULATOR, SFM5, Z PACK, BENT DOWN, 5 PIN
MSK5209ZS	MSK	获取价格	DUAL OUTPUT, FIXED MIXED LDO REGULATOR, SFM5, Z PACK, STRAIGHT, 5 PIN
MSK5209-ZU	MSK	获取价格	Fixed Mixed LDO Regulator, 2 Output, 10V1, -10V2, Z PACK, BENT UP, 5 PIN
MSK5210	ANAREN	获取价格	DUAL POSITIVE/NEGATIVE, 3 AMP, ULTRA LOW DROPOUT FIXED VOLTAGE REGULATORS
MSK5210	MSK	获取价格	Ultra Low Dropout Voltage
MSK5210-ETD	MSK	获取价格	Fixed Mixed LDO Regulator, 2 Output, 5.2V1, -5.2V2, TOP TAB, BENT DOWN, 5 PIN
MSK5210-ETS	MSK	获取价格	Fixed Mixed LDO Regulator, 2 Output, 5.2V1, -5.2V2, TOP TAB, STRAIGHT, 5 PIN
MSK5210-EZD	MSK	获取价格	Fixed Mixed LDO Regulator, 2 Output, 5.2V1, -5.2V2, Z PACK, BENT DOWN, 5 PIN

与MSK5209-HZU相关文章

LM317T数据手册解读：产品特性、应用、封装与引脚详解
2024-06-14

16
一文带你了解?DB3二极管好坏判断、参数信息、替代推荐
2024-06-14

20
LM358DR数据手册：引脚说明、电气参数及替换型号推荐
2024-06-14

12
OP07CP数据手册解读：引脚信息、电子参数
2024-06-14

17

产品中心

服务支持

精选活动

关于我们

帮助中心

MSK5209-HZU

MSK5209-HZU 数据手册

与MSK5209-HZU相关器件

与MSK5209-HZU相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

MSK5209-HZU

MSK5209-HZU 数据手册

与MSK5209-HZU相关器件

与MSK5209-HZU相关文章

您还可以找

您在本页遇到什么问题？