STMicroelectronics’ L6983 38V/3A synchronous DC/DC converters exhibit a maximum efficiency of 95%, and are highly integrated with synchronous MOSFETs on-chip to save external components and simplify design. The quiescent current is 17µA, with low current consumption (L6983C) and low-noise (L6983N) variants available. The L6983C enters pulse-skipping mode when the load current is below 0.6A while the L6983N, suitable for noise-sensitive applications, stays in PWM (pulse-width modulation) mode at all loads to minimize electromagnetic disturbances.

With an input voltage range from 3.5V to 38V, L6983 converters can be ordered with 3.3V, 5V, or adjustable output voltage. All L6983 variants feature a Power-Good output pin that can be used for power-up/power-down sequencing, enabling logic circuitry, or as a fault indicator. In addition, integrated feedback-loop compensation, over-voltage protection, and soft-start circuitry simplify the design. The L6983C and L6983N are in production now, packaged in 3mm x 3mm QFN16, from $1.50 for orders over 1000 pieces.

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