The IR3840W is an easy-to-use, fully integrated and highly efficient DC/DC synchronous Buck regulator. It features greater than 96% maximum efficiency, wide input and output voltage range, continuous 12A load capability, integrated Bootstrap-diode, and other characteristics. It is suitable for server applications, storage applications, and embedded telecom systems.
The IR3840WMPbF is a highly efficient, fully integrated synchronous buck regulator from International Rectifier. It delivers up to 12 A continuous load with a wide input range of 1.5 V‑16 V and an output range of 0.7 V‑0.9 × Vin.
The device features programmable switching frequency (250 kHz‑1.5 MHz), integrated bootstrap diode, precision reference, and extensive protection functions such as thermal shutdown and over‑current limit. It is supplied in a compact 5 mm × 6 mm QFN package suitable for point‑of‑load applications.
| Maximum Efficiency | >96% |
|---|---|
| Input Voltage Range | 1.5 V to 16 V |
| Output Voltage Range | 0.7 V to 0.9 × Vin |
| Continuous Load Current | 12 A |
| Switching Frequency (programmable) | 250 kHz – 1.5 MHz |
| Package | 5 mm × 6 mm Power QFN, 0.9 mm height |
| Operating Junction Temperature | -40 °C to 125 °C |
| Thermal Protection | Thermal shutdown |
The device achieves greater than 96% maximum efficiency.
It operates with an input voltage from 1.5 V to 16 V.
It comes in a 5 mm × 6 mm Power QFN package with a 0.9 mm height.
The switching frequency can be set between 250 kHz and 1.5 MHz.