The LTC ®1433/LTC1434 are monolithic pulse width modulated step-down DC/DC converters. By utilizing current mode switching techniques, they provide excellent AC and DC load and line regulation.
The LTC1433 and LTC1434 are monolithic pulse‑width‑modulated step‑down DC/DC converters designed for high efficiency (up to 93%) and low quiescent current. They operate over a wide input range and include internal P‑channel MOSFETs, a low‑battery detector, and a programmable output voltage.
The document includes detailed electrical characteristics, pin descriptions, functional diagrams, typical performance curves, and application guidelines such as component selection, inductor sizing, and frequency synchronization. Package dimensions and a typical application circuit are also provided.
| Input Voltage Range | 3V to 13.5V |
|---|---|
| Maximum Output Current | 450 mA |
| Efficiency | Up to 93 % |
| Quiescent Current | 470 pA |
| Shutdown Current | 15 µA |
The devices operate from 3 V up to 13.5 V input.
They can deliver up to 450 mA of output current.
The quiescent current is only 470 pA.
They achieve a high efficiency of up to 93 %.