STMicroelectronics – 36V, 400mA synchronous step-down switching regulator

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The L6984 from STMicroelectronics is a step-down monolithic switching regulator which can supply as much as 400mA to the load.

The L6984’s output voltage is highly adjustable down to as low as 0.9V. It operates from a wide input-voltage range of 4.5V to 36V.

The device can implement both a Low Consumption Mode (LCM) and a Low Noise Mode (LNM). The LCM maximises efficiency at light loads, while keeping the output-voltage ripple low. In LNM the switching frequency is almost constant over the load-current range, enabling noise-sensitive applications to easily filter out switching noise.

Pulse-by-pulse current sensing on the low side provides for constant current protection.

• 13μA shut-down current
• Adjustable switching-frequency range: 250kHz-600kHz
• Constant on-time control scheme
• Thermal shut-down protection

Orderable Part Number: STEVAL-ISA159V1

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