IR3843WMPbF is an integrated and highly efficient DC/DC synchronous Buck regulator with wide input voltage range, wide output voltage range, continuous 2A load capability, integrated bootstrap diode, etc.
The IR3843WMPbF is a fully integrated, high‑efficiency synchronous buck regulator with a wide input voltage range (1.5 V‑16 V) and programmable switching frequency up to 1.5 MHz. It offers features such as integrated bootstrap diode, programmable over‑current protection, soft‑start, and thermal shutdown.
The document includes a block diagram, detailed pin functions, recommended operating conditions, electrical specifications, typical performance curves, and mechanical data such as the 5 mm × 6 mm Power QFN package and stencil design guidelines.
| Input Voltage Range | 1.5 V to 16 V |
|---|---|
| Output Voltage Range | 0.7 V to 0.9 × Vin |
| Switching Frequency | 225 kHz to 1.650 MHz (up to 1.5 MHz programmable) |
| Maximum Output Current | 2 A (continuous) |
| Package | 5 mm × 6 mm Power QFN |
| Thermal Shutdown Temperature | 140 °C |
The device operates with an input voltage from 1.5 V to 16 V.
The switching frequency is programmable up to 1.5 MHz via external components.
The regulator can deliver up to 2 A of continuous output current.
It is supplied in a 5 mm × 6 mm Power QFN package.