L4978 is a step down monolithic power switching regulator that delivers 2A output current between 3.3V and 50V. It features a wide input voltage range, adjustable output voltage, and adjustable switching frequency.
The L4978 is a monolithic power switching regulator realized in BCD mixed technology. It delivers up to 2A at a voltage between 3.3V and 50V, selected by an external divider. The device features an internal power D-MOS transistor with a typical Rds(on) of 0.25Ω, enabling high efficiency and switching speeds up to 300kHz.
| Maximum output current | 2A |
|---|---|
| Operating input voltage range | 8V to 55V |
| Output voltage range | 3.3V to 50V |
| Switching frequency | Up to 300kHz |
| Internal reference voltage | 3.3V (±1%) |
| Typical Rds(on) | 0.25Ω |
| Maximum efficiency | 87% |
| Typical switching frequency | 100kHz |
The device operates with an input voltage from 8V to 55V.
The L4978 can deliver up to 2A.
Yes, the device includes a soft-start function to limit inrush current.
The device is available in DIP-8 and SO16W packages.