Micrel Semiconductor Announces the MIC2186 DC/DC Controller
A flexible low-voltage dc/dc PWM controller, configurable for boost, SEPIC and Flyback topologies, is now available from Micrel Semiconductor (San Jose, CA). The MIC2186 generates high-voltage, high-current supply rails from the main 3.3V supply, and features an input voltage of 2.9V to 14V, and a built-in, high-power 7A output driver that is capable of driving large MOSFETs. The MIC2186 can boost a 3.3V input, and achieves 5V output at 5A at over 90 percent efficiency.
The switching frequency of the MIC2186 can be selected from 100kHz, 200kHz or 400kHz, depending on the efficiency and noise spectrum requirements of the power supply. The MIC2186 can be synchronized up to 600kHz. The MIC2186 has a maximum duty cycle of 85 percent. A user-selectable option allows the maximum duty cycle to be reduced to 50 percent, permitting the MIC2186 to be used in flyback applications.
The MIC2186BM is available in a SO-16 package, and is priced at $3.50 in 1,000-piece quantities. Samples are available from stock, and production quantities are stock to 12 weeks ARO.
