STMicroelectronics L5981 Manuals

The L5981 is a 1A step-down switching regulator with 1.5A (min.) current limited embedded power MOSFET, so it is able to deliver in excess of 1A DC current to the load depending on the application condition. The input voltage can range from 2.9V to 18V, while the output voltage can be set starting from 0.6V to VIN. Having a minimum input voltage of 2.9V, the device is suitable also for 3.3V bus. Requiring a minimum set of external components, the device includes an internal 250kHz switching frequency oscillator that can be externally adjusted up to 1MHz. The VFQFPN8 package with exposed pad allows reducing the RthJA down to approximately 60°C/W.

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.