MORNSUN K7805-500R3
0.5A Non-Isolated DC-DC Buck (Step-Down) Switching Regulator
FAE Distributor's Review
The K78 series is one of our most popular problem-solvers. Engineers love it because it's a simple, drop-in replacement for inefficient LM7805 linear regulators. With efficiency up to 96%, it generates significantly less heat, eliminating the need for a heatsink. This saves space, cost, and improves overall system reliability. It's a fantastic upgrade for any design still using linear regulators for point-of-load conversion.
Key Specifications
| Output Current | 0.5A |
| Output Voltage | 5V |
| Input Voltage | 6.5-36VDC |
| Efficiency | Up to 96% |
| Operating Temp. | -40℃ to +85℃ |
| Package | SIP3 (LM78xx Pin-out) |
| Heatsink Required? | No |
Frequently Asked Questions
Is this really a drop-in replacement for an LM7805?
Yes, it has the same 3-pin layout (Input, Ground, Output) and can be used in most circuits designed for an LM7805 without any PCB changes. However, as a switching regulator, it may require small input/output capacitors for stability, as detailed in the datasheet.
What is the main advantage over a linear regulator?
Efficiency. A linear regulator burns the excess voltage as heat. A K78 converts it. For example, converting 24V to 5V at 0.5A, an LM7805 would dissipate over 9.5 Watts of heat (requiring a large heatsink), while the K78 would dissipate less than 0.2 Watts.