Evaluation board based on high-efficiency monolithic synchronous step-down regulator

06-02-2015 | Mouser Electronics | Design & Manufacture

Mouser now stocks the STMicroelectronics STEVAL-ISA159V1 evaluation board
which is based on a high-efficiency monolithic synchronous step-down
regulator, capable of delivering up to 400mA of DC current.

The fixed 3.3V output requires no external resistor divider. The low
consumption mode (LCM) is designed for applications active during car
parking, so it maximizes the efficiency at light load with controlled output
voltage ripple. The low noise mode (LNM) makes the switching frequency
nearly constant over the load current range, serving low noise application
specifications such as vehicle audio / sensors.

The PGOOD open collector output can implement output voltage sequencing
during the power-up phase. The synchronous rectification, designed for high
efficiency at medium-heavy load, and the high switching frequency capability
ensure a compact application size. Pulse-by-pulse current sensing on the
low-side power element implements effective constant current protection.

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