The L5972D is a step down monolithic power switching regulator with a minimum switch current limit of 2A so it is able to deliver more than 1.5A DC current to the load depending on the application conditions. The output voltage can be set from 1.235V to 35V. The device uses an internal P-Channel D-MOS tran- sistor (with a typical Rdson of 250mΩ) as switching element to minimize the size of the external compo- nents. An internal oscillator fixes the switching frequency at 250KHz. Having a minimum input voltage of 4.4V only, it is particularly suitable for 5V bus, available in all com- puter related applications. Pulse by pulse current limit with the internal frequen- cy modulation offers an effective constant current short circuit protection.
The L5972D is a monolithic step‑down switching regulator featuring a 2 A internal switch, 250 kHz fixed frequency, and a wide input voltage range of 4.4 V to 36 V. The output voltage is adjustable from 1.235 V to 35 V, making it suitable for consumer, networking, computer, and industrial applications.
The datasheet provides detailed electrical characteristics, thermal data, pin descriptions, mechanical dimensions, and example application circuits, along with a component list and PCB layout for reference.
| Input voltage range | 4.4 V to 36 V |
|---|---|
| Output voltage range | 1.235 V to 35 V |
| Switching frequency | 250 kHz (fixed) |
| Maximum output current (internal switch limit) | 2 A |
| Typical MOSFET on‑resistance (Rds(on)) | 250 mΩ |
| Thermal resistance (junction‑to‑ambient) | 65 °C/W |
| Power dissipation (Tₐₘₚ < 70 °C) | 1.2 W |
The regulator operates from 4.4 V up to 36 V.
The output voltage is adjustable between 1.235 V and 35 V.
The device uses a fixed internal switching frequency of 250 kHz.
The internal switch is rated for a minimum of 2 A, allowing more than 1.5 A to the load under typical conditions.