Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Function | Integrated synchronous buck regulator |
| Input range | 1.5 V to 16 V |
| Output current | 12 A continuous class |
| Output range | 0.7 V to 0.9 × VIN |
| Reference | 0.7 V ±1% |
| Switching frequency | Programmable, approximately 225 kHz to 1.65 MHz |
| Bias supply | 4.5 V to 5.5 V |
Product Overview
IR3840MTRPBF is the tape-and-reel orderable of the IR3840 SupIRBuck synchronous step-down regulator. The device integrates high-side and low-side MOSFETs with PWM control, programmable switching frequency, soft-start, current limiting, Power Good and hiccup protection for high-current point-of-load conversion.
The part is a 12 A-class integrated regulator, but practical current depends strongly on PCB copper and exposed-pad thermal design. The 5 mm × 6 mm Power QFN should be laid out from the manufacturer land pattern rather than treated as a generic QFN.
Technical Specifications
| Parameter | Confirmed Information |
|---|---|
| Input voltage | 1.5 V to 16 V |
| Output voltage | 0.7 V to 0.9 × VIN |
| Continuous output current | 12 A class |
| Reference voltage | 0.7 V ±1% |
| Switching frequency | ~225 kHz to 1.65 MHz programmable |
| External bias supply | 4.5 V to 5.5 V |
| Junction temperature range | -40°C to +125°C |
| Thermal shutdown | ~140°C with ~20°C hysteresis |
| Protection | Current limit, hiccup, thermal shutdown |
| Package | 5 mm × 6 mm Power QFN |
Design Considerations
High-current switch-node, input-capacitor and PGND paths should be minimized to control ringing and EMI. The exposed pad requires a dense thermal-via structure into internal or backside copper.
Switching frequency directly trades magnetic size against switching loss. Inductor value, compensation and output capacitance should be designed at the chosen frequency rather than copied from another SupIRBuck device.
Related Engineering Resources
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
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