Monolithic Power Systems MPM3805 and MPM3810 step-down switch-mode converter modules

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The MPM3805 and MPM3810 are monolithic step-down switch-mode converter modules with built-in internal power MOSFETs and inductors. The DC/DC modules have a small surface mount and are available in a 2.5 x 3 x 0.9 mm QFN package.

The MPM3805 and MPM3810 achieve 0.5 and 1.2 A continuous output current from a 2.5 to 6 V input voltage and good load and line regulation. Their output voltage can be regulated as low as 0.6 V. Only input, output capacitors and FB resistors are needed to complete the design.

The constant on-time (COT) control scheme provides fast transient response and eases loop stabilisation. Fault-condition protection includes cycle-by-cycle current limiting and thermal shutdown.

Other features include: ultralow IQ of 17 μA; default 3.5 MHz switching frequency; EN and power good for power sequencing; short-circuit protect with hiccup mode.