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RT9164A-28GG 参数 Datasheet PDF下载

RT9164A-28GG图片预览
型号: RT9164A-28GG
PDF下载: 下载PDF文件 查看货源
内容描述: 1A固定和可调低压差正稳压器 [1A Fixed and Adjustable Low Dropout Positive Voltage Regulators]
分类和应用: 稳压器
文件页数/大小: 14 页 / 207 K
品牌: RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
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RT9164A  
R
Parasitic  
P
RT9164A  
VIN VOUT  
ADJ  
Line Resistance  
VIN  
R1  
(Connect R1 to VOUT  
or case)  
R
L
R2  
Connect R2 to load  
Figure 6. Best Load Regulation Using Adjustable  
Output Regulator  
Thermal Protection  
RT9164A has thermal protection which limits junction  
temperature to 150°C. However, device functionality is only  
guaranteed to a maximum junction temperature of +125°C.  
The power dissipation and junction temperature for RT9164A  
are given by  
PD = (VIN - VOUT) x IOUT  
TJUNCTION = TAMBIENT + (PD x θJA)  
Note: TJUNCTION must not exceed 125°C  
Current Limit Protection  
RT9164A is protected against overload conditions. Current  
protection is triggered at typically 1.8A.  
Thermal Consideration  
The RT9164A series contain thermal limiting circuitry  
designed to protect itself from over-temperature conditions.  
Even for normal load conditions, maximum junction  
temperature ratings must not be exceeded.As mention in  
thermal protection section, we need to consider all sources  
of thermal resistance between junction and ambient. It  
includes junction-to-case, case-to-heat-sink interface, and  
heat sink thermal resistance itself.  
Junction-to-case thermal resistance is specified from the  
IC junction to the bottom of the case directly below the  
die. Proper mounting is required to ensure the best possible  
thermal flow from this area of the package to the heat  
sink. The case of all devices in this series is electrically  
connected to the output. Therefore, if the case of the device  
must be electrically isolated, a thermally conductive spacer  
is recommended.  
DS9164A-13 August 2007  
www.richtek.com  
11  
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