The L5972D is a step-down monolithic power switching regulator capable of delivering up to 2 A at output voltages from 1.235 V to 35 V. It has been designed using BCDV technology and the power switching element is implemented through a P-channel DMOS transistor. It does not require a bootstrap capacitor, and the duty cycle can range up to 100%. An internal oscillator fixes the switching frequency at 250 kHz. This minimizes the LC output filter. Pulse-by-pulse and frequency foldback over-current protection offer effective protection against short-circuit. Other features are voltage feed-forward, protection against feedback disconnection, and thermal shutdown. The device is housed in a thermally improved SO-8 package (with 4 pins connected to GND so that the thermal resistance junction-to-ambient is reduced to approximately one-half compared with a standard SO-8 package.
The document provides a comprehensive guide for designing applications around the L5972D high efficiency DC-DC converter. It details the device's functional blocks, including its internal oscillator fixed at 250 kHz, pulse-by-pulse and frequency foldback over-current protection, and thermal shutdown features.
| Output current capability | up to 2 A |
|---|---|
| Operating input voltage range | 4.4 V to 36 V |
| Output voltage range | 1.235 V to 35 V |
| Switching frequency | 250 kHz |
The typical value for the resistor connected between this pin and ground is 4.7 k.
No, it does not require a bootstrap capacitor.