The LT3430 is a high voltage, 3A, 200kHz step-down switching regulator with a wide input range, high efficiency, fast transient response, and excellent loop stability.
The LT3430 is a constant‑frequency, current‑mode buck converter that operates from 5.5 V to 60 V input and delivers up to 3 A of output current. It features a 200 kHz switching frequency, low shutdown current (30 pA), and a 1.2 V feedback reference voltage, making it suitable for high‑efficiency power‑supply designs.
Typical applications include industrial and automotive power supplies, portable computers, battery chargers, and distributed power systems. The datasheet provides absolute maximum ratings, electrical characteristics, pin descriptions, block diagram, and layout recommendations for the 16‑lead TSSOP package.
| Input Voltage Range | 5.5 V to 60 V |
|---|---|
| Peak Switch Current | 3 A |
| Switching Frequency | 200 kHz |
| Shutdown Current | 30 pA |
| Feedback Reference Voltage | 1.2 V |
The LT3430 operates from 5.5 V up to 60 V input.
It can deliver a peak switch current of 3 A across all duty cycles.
The device has a shutdown current of 30 pA.
The LT3430 uses a constant 200 kHz switching frequency.