The LT3434 is a high voltage power converter suitable for 14V and 42V automotive systems, industrial power systems, distributed power systems, and battery-powered systems. It features a wide input range (3.3V to 60V), 3A peak switch current, 100μA quiescent current, low power mode, and load dump protection.
The LT3434 is a constant‑frequency, current‑mode buck converter designed for high‑efficiency step‑down conversion. It operates from 3.3 V to 60 V input and delivers up to 3 A peak switch current, featuring Burst Mode operation with a quiescent current as low as 0.1 µA.
The device includes a 16‑pin TSSOP package with an exposed pad for thermal management, multiple protection features such as load‑dump protection and thermal shutdown, and pins for synchronization, biasing, and power‑good signaling.
| Input Voltage Range | 2.4 V – 60 V |
|---|---|
| Peak Switch Current | 3 A |
| Switching Frequency | 180 kHz – 230 kHz |
| Maximum Duty Cycle | 92 % |
| Quiescent Current (Burst Mode) | 0.1 µA |
| Shutdown Current | < 1 A |
The LT3434 can tolerate up to 60 V on its input pins.
In Burst Mode the device draws about 0.1 µA of quiescent current.
The LT3434 is supplied in a 16‑lead TSSOP package.
The SHDN pin requires a voltage above 1.3 V to leave shutdown.