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Intelligent Power Switch

R5550K Block Diagram

Intelligent power switch protects a battery line. For example, each IC of the R5550K series has two steps abnormal current detectors and an abnormal voltage detector. In the R5550KxxxA, the first step abnormal current detector for lower current, detecting counter delay is set long, but second step abnormal current detector for higher current, the counter delay is set short.
Therefore, recognition of the momentum permissible current is possible. Not only that, if the preset detector delay time has passed, the switch turns off. But after a certain time, automatically resumed and checking the current again and the same operation repeats until the abnormal cause is removed.

Lineup

Product
Name
ON Resistance Supply
Current
Operating Voltage Range UVLO Detect
Voltage
Output
Current
Current Limit Threshold Output Current Limit Internal
FET
Typ. Typ. Min. Typ. Max. Min. Typ. Max.
R5550 180mΩ  2.6µA  2.3V to 5.25V  1.9V  1A  300mA  460mA  624mA  1130mA  1470mA  1790mA  Pch 

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Product
Name
Detector
Threshold
Current Limit/
Under Voltage Detection
Output Current Limit Protection Package Datasheet
Typ. Delay Time OFF Time ON Time Delay Time OFF Time ON Time
R5550 0.5V 10ms  80ms  2.5ms  1.33ms  80ms  1.33ms  Auto Release DFN(PLP)1010-4F Consumer

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