The L4977A is a stepdown monolithic power switching regulator delivering 7A at a voltage variable from 5.1 to 40V. It features reset and power fail for microprocessors, feed forward line regulation, soft start, limiting current, and thermal protection.
The L4977A is a stepdown monolithic power switching regulator delivering 7A at an output voltage variable from 5.1V to 40V. Realized with BCD mixed technology, the device uses a DMOS output transistor to obtain very high efficiency and very fast switching times. It is mounted in a 15-lead multiwatt plastic power package and requires few external components.
| Output Current | 7A |
|---|---|
| Output Voltage Range | 5.1V to 40V |
| Switching Frequency | Up to 500KHz |
| Package Type | 15-lead multiwatt plastic power package |
| Reference Voltage | 5.1V ± 2% |
| Maximum Power Dissipation | 30 W |
| Junction Temperature Range | -40 to 150 °C |
The device supports switching frequencies up to 500KHz.
Yes, it includes thermal shutdown which disables circuit operation when the junction temperature reaches about 150°C.