The document introduces a step-down switching regulator from STMicroelectronics with a DC output current of up to 1A. It has an input voltage range of 2.9V to 18V and an adjustable output voltage from 0.6V to 16V. The product features a switching frequency of 250kHz, programmable up to 1MHz. It also includes internal soft-start and inhibit functions, low dropout operation with 100% duty cycle, zero-load current operation, and over-current and thermal protection.
The EVAL5981 is a demonstration board designed for the L5981 step-down switching regulator, providing a fully functional design with an output current of up to 1 A. The board supports an input voltage range of 2.9 V to 18 V and allows the output voltage to be adjusted from 0.6 V to 16 V. It features a default output voltage of 3.3 V set by an external resistor divider.
| Output current | 1 A |
|---|---|
| Input voltage range | 2.9 V to 18 V |
| Output voltage range | 0.6 V to 16 V |
| Switching frequency | 250 kHz to 1 MHz |
| Default output voltage | 3.3 V |
The board features an external resistor divider designed for an output voltage of 3.3 V.
Yes, the output voltage can be set to a level from 0.6 V up to the rated voltage of the output capacitor (16 V).