LTC3448 3448f is a high efficiency synchronous step-down regulator with optional linear regulator mode. It has 1.5MHz or 2.25MHz switching frequency and 600mA output current. It supports low output voltage.
The LTC3448 is a monolithic synchronous buck regulator that operates with a constant‑frequency, current‑mode architecture. It delivers up to 600 mA output current, supports 2.5 V‑5.5 V input, and can switch to a low‑dropout linear regulator mode for light loads.
Key features include up to 96 % efficiency, a quiescent supply current of 32 µA in linear mode, shutdown current below 1 pA, and selectable 1.5 MHz or 2.25 MHz switching frequencies. The device is offered in a low‑profile 8‑lead DFN or MSOP package.
| Input Voltage Range | 2.5 V to 5.5 V |
|---|---|
| Maximum Output Current | 600 mA |
| Efficiency | Up to 96 % |
| Shutdown Supply Current | < 1 pA |
The device operates with an input voltage from 2.5 V to 5.5 V.
It can supply up to 600 mA of output current.
The regulator achieves up to 96 % efficiency.
In shutdown, the supply current is less than 1 pA.