LTC4418CUF#TRPBF

LTC4418 is a dual channel prioritized powerpath controller. It connects one of two valid power supplies to a common output based on priority and validity. Priority is defined by pin assignment, with V1 assigned the higher priority and V2 the lower priority. A power supply is defined as valid when its voltage has been within its overvoltage (OV) and undervoltage (UV) window continuously for at least the configured validation time. If the highest priority valid input falls out of the OV/UV window, the channel is immediately disconnected and the other valid input is connected to the common output. This device incorporates fast non-overlap switching circuitry to prevent both reverse and cross conduction while minimizing output droop. It is widely used in application such as industrial handheld instruments, high availability systems, battery backup systems, servers and computer peripherals etc.

• Selects highest priority supply from two inputs
• Blocks reverse and cross conduction currents
• Wide operating voltage range is 2.5V to 40V
• 42V protection against reverse connection, cascadable for additional input supplies
• 60V tolerant V1, V2 input, adjustable overvoltage/undervoltage hysteresis
• Adjustable input validation time, ±1.5% input overvoltage/undervoltage protection
• Fast switchover minimizes output voltage droop
• Supply current is 26µA typical
• Operating temperature is 0°C to 70°C
• Package style is 20-lead plastic QFN

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