The LT
The LT3840 is a high voltage synchronous step-down switching regulator controller capable of operating from a 2.5V to 60V supply. It features a constant frequency, current mode architecture and includes an integrated buck-boost switching regulator that generates a 7.5V bias supply voltage for MOSFET gate drive and IC power. This eliminates the need for an external bias voltage and allows for higher efficiency operation over the entire input voltage range.
The device includes programmable constant-current operation with a current monitor output, selectable low output ripple Burst Mode operation, and internal protections for input transients up to 80V. It is available in 28-Lead TSSOP and 38-Lead 4mm x 6mm QFN packages.
| Input Supply Range | 2.5V to 60V |
|---|---|
| Integrated Bias Supply | 7.5V |
| Output Voltage | Up to 60V |
| Switching Frequency Range | 50kHz to 1MHz |
| Input Overvoltage Protection | Up to 80V |
| Package Types | 28-Lead TSSOP and 38-Lead QFN |
The LT3840 is capable of operating from a 2.5V to 60V supply.
No, it uses an integrated buck-boost switching regulator to generate the required 7.5V bias supply voltage.
The device is available in 28-Lead TSSOP and 38-Lead 4mm x 6mm QFN packages.