LTC4418 - Dual Channel Prioritized PowerPath Controller
Datasheet Documentation
Press Release


Typical Application

LTC4418 Typical Application
LTC4418 Typical Application


The LTC®4418 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. Multiple LTC4418s, as well as triple channel LTC4417s, can be cascaded to provide switchover between more than two inputs.

The LTC4418 incorporates fast non-overlap switching circuitry to prevent both reverse and cross conduction while minimizing output droop.  The gate driver includes a 6V clamp to protect external MOSFETs. A controlled soft-start feature minimizes start-up inrush current. Open drain VALID outputs indicate the input supplies have been within their OV/UV window for the duration of the validation time. The validation time can be disabled or adjusted using an external capacitor 


4x4 QFN-20

LTC4418 Package Drawing
Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price
LTC4418IUF#PBF QFN 20 I $4.03 $2.82
LTC4418IUF#TRPBF QFN 20 I $4.09 $2.88
LTC4418CUF#TRPBF QFN 20 C $3.56 $2.51
LTC4418CUF#PBF QFN 20 C $3.50 $2.45
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.