The LT3684 is an adjustable frequency (300kHz to 2.8MHz) monolithic buck switching regulator that accepts input voltages up to 34V (36V maximum).
The LT3684 is an adjustable‑frequency buck switching regulator that accepts input voltages from 3.6 V up to 34 V (36 V max) and delivers up to 2 A of output current. It features a low shutdown current, integrated boost diode, power‑good flag, and a saturating switch with 0.182 Ω on‑resistance. The device operates from 300 kHz to 2.8 MHz, allowing the use of small inductors and capacitors for compact solutions.
Available in 10‑lead MSOP and 3 mm × 3 mm DFN packages with exposed pads, the LT3684 includes pin functions for boost, switch, bias, feedback, and control. Typical applications include automotive battery regulation, portable product power, distributed supply regulation, and industrial supplies.
| Input Voltage Range | 3.6 V to 34 V (36 V max) |
|---|---|
| Maximum Output Current | 2 A |
| Switching Frequency Range | 300 kHz to 2.8 MHz |
| Feedback Reference Voltage | 1.265 V |
| Shutdown Current | < 1 A |
| Switch On‑Resistance | 0.182 Ω |
| Package Types | 10‑pin MSOP and 3 mm × 3 mm DFN |
The device can operate up to 34 V input, with a 36 V absolute maximum rating.
It supports an adjustable switching frequency from 300 kHz to 2.8 MHz.
Both the MSOP and DFN versions have 10 pins, with an exposed pad for grounding.
The shutdown current is less than 1 A.