This is a 1.25MHz step-down switching regulator with high efficiency, low dropout voltage and low static current
The LT1765 family provides a constant‑frequency, current‑mode buck converter capable of delivering up to 3 A continuous load current. It operates at a fixed 1.25 MHz switching frequency and includes features such as synchronizable external clock input, low‑dropout shutdown, and fast transient response.
The device is offered in adjustable (LT1765) and fixed‑output versions (‑1.8, ‑2.5, ‑3.3, ‑5 V). Pin functions, typical performance graphs, and package options are detailed for designers, with recommended input and output capacitor selections to minimize ripple and EMI.
| Maximum Switch Current Limit | 3 A min / 4 A typ / 6 A max |
|---|---|
| Maximum Input Voltage | 25 V |
| SYNC Pin Current | 1 mA |
The device is rated for a maximum input voltage of 25 V.
The SYNC pin draws up to 1 mA of current.
The SHDN pin turns off the regulator and reduces input drain current to a few microamperes.
It can handle up to 3 A continuous, with a maximum rating of 6 A.