Micrel has shrunk its industry-standard quad USB power switches to fit into a narrow 150 mil SOIC package while boosting performance of all four channels. The MIC2027 and MIC2077 are functionally and pin compatible with the industry standard MIC2527 quad USB switch introduced by Micrel two years ago.
Both of the new devices offer enhanced performance, including overcurrent response filter, improved current-limit performance and independent thermal response of the four channels. Their 150 mil SOIC packaging reduces the board space needed to implement a four channel solution.
Improved current limit performance of the MIC2027/2077 decreases power supply requirements by reducing current consumption during a fault. Further savings in power dissipation are achievable with the MIC2077, which features a circuit breaker function that latches the output off if the device enters thermal shutdown.
Separate enable inputs and fault flag outputs are provided for each switch. Fault flags report overcurrent or thermal shutdown conditions. Each channel of the MIC2027/2077 is thermally isolated from the others, ensuring that fault conditions on one channel do not affect the others.
The MIC2027 and MIC2077 are available in 16-pin narrow (150 mil) and wide (300 mil) SOIC packages.
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