LT3840IFE#PBF

LT®3840 is a high voltage synchronous step-down switching regulator controller capable of operating from a 2.5V to 60V supply. The LT3840’s low quiescent current, when configured for user selectable burst mode operation, helps extend run time in battery-powered systems by increasing efficiency at light loads. The LT3840 uses a constant frequency, current mode architecture. High current applications are possible with large N-channel gate drivers capable of driving multiple low RDS(ON) MOSFETs. An integrated buck-boost switching regulator generates a 7.5V bias supply voltage for MOSFET gate drive and IC power allowing higher efficiency operation over the entire input voltage range and eliminating the need for an external bias voltage. An accurate current limit set point regulates the maximum output current. A current monitor reports the average output current. Typical applications are automotive supplies, industrial systems, distributed DC power systems.

• Integrated buck-boost supply for 7.5V MOSFET gate drive
• Programmable constant-current operation with current monitor output
• Internal OVLO protects for input transients up to 80V
• Accurate input overvoltage and undervoltage threshold
• Programmable soft-start with voltage tracking, power good and output OVP
• VIN supply current is 20µA
• VIN shutdown current is 1µA (VEN=0.3V, TA=25°C)
• FB input bias current is 20nA
• 28-lead plastic TSSOP package
• Temperature rating range from -40°C to 125°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party