Micrel Inc. announced the availability of the MIC2875 / MIC2876, two 2 MHz boost converters capable of delivering up to 2 A output in only 122 mm squared of board space with a minimum of just three tiny external components required. These low-profile and highly efficient regulators (up to 95 percent) are ideally suited for operating from a single cell lithium battery and providing power to applications such as USB on-the-go (OTG) and HDMI hosts, tablets, and smartphones. These devices offer bi-directional true load disconnect to prevent current flow between the input and output when the regulator is disabled. The solutions also support bypass mode operation when the input voltage exceeds the set output voltage. Under light loads, the device reduces the switching frequency to extend battery life. The MIC2875/MIC2876 are available in volume with 1,000 quantities pricing starting at $0.55/$0.52, respectively.
An anti-ringing switch minimizes EMI issues during discontinuous mode. The MIC2876 also features a minimum switching frequency of 45 kHz during light load operation to optimize the performance of the boost regulator to meet the low-noise requirements for audio applications.
The MIC2875/MIC2876 are available either with 4.75 V, 5.0 V, 5.25 V, and 5.5 V fixed output voltages or adjustable output voltage. These parts are fully protected against overcurrent and thermal conditions. The devices are specified with a junction temperature range from –40 °C to +125 °C.
