The LT1506 is a 500kHz step-down switching regulator with a constant switching frequency of 500kHz. It is easily synchronizable and operates with an input as low as 4V. The regulator uses all surface mount components and features a reduced inductor size of 1.8µH. The saturating switch design has a resistance of 0.07Ω and the shutdown current is 20µA. It also includes cycle-by-cycle current limiting. The LT1506 is optimized for lower input voltage applications and has a wide input range of 4V to 15V. It is a current mode topology with high efficiency at high switching frequency. The regulator fits into standard 7-pin DD and fused lead SO-8 packages and provides full cycle-by-cycle short-circuit protection and thermal shutdown. It can be used for both fixed output voltage and adjustable applications.
The LT1506 is a 500 kHz constant‑frequency, current‑mode buck switching regulator designed for low‑voltage input applications. It operates from 4 V to 15 V input and includes built‑in shutdown circuitry that reduces quiescent current to 20 µA.
The device offers adjustable output versions with a feedback pin for voltage setting, as well as fixed‑3.3 V variants. Detailed electrical characteristics, pin functions, typical performance curves, and application schematics are provided for designers.
| Switching Frequency | 500 kHz (constant) |
|---|---|
| Input Voltage Range | 4 V to 15 V |
The LT1506 operates at a constant 500 kHz switching frequency.
It supports an input voltage range from 4 V to 15 V.