The L5973D is a step-down monolithic power switching regulator with a minimum switch current limit of 2.5 A, so it is able to deliver more than 2 A DC current to the load depending on the application conditions. The output voltage can be set from 1.235 V to 35 V. The high current level is also achieved thanks to an SO8 package with exposed frame, that allows to reduce the Rth(j-amb) down to approximately 40 °C/W. The device uses an internal P-channel D-MOS transistor (with a typical Rdson of 250 mΩ) as switching element to minimize the size of the external components. An internal oscillator fixes the switching frequency at 250 kHz. Having a minimum input voltage of 4 V only, it is particularly suitable for applications with low input voltage and high output current.
The L5973D from STMicroelectronics is a step-down monolithic power switching regulator with a 2.5 A internal switch and an operating input voltage range of 4 V to 36 V. The output voltage can be set from 1.235 V to 35 V; the internal oscillator fixes the switching frequency at 250 kHz, and the device uses an internal P-channel D-MOS transistor as the switching element.
This datasheet presents pin settings and descriptions, maximum ratings, thermal data, electrical characteristics, typical performance curves, an application circuit with component list and PCB layouts, package mechanical data, order codes and revision history.
| Input voltage range | 4 V to 36 V |
|---|---|
| Output voltage range | 1.235 V to 35 V |
| Internal switch current | 2.5 A |
| Switching frequency | 250 kHz |
| Reference voltage | 3.3 V (±2%) |
| Package | HSOP8 exposed pad |
| Operating junction temperature | -40 to 150 °C |
| MOSFET on resistance | 250 mΩ typical |
The operating input voltage range is 4 V to 36 V.
The output voltage is adjustable from 1.235 V to 35 V.
The internal oscillator fixes the switching frequency at 250 kHz.
It can deliver more than 2 A DC current to the load, depending on application conditions.