LTC4449EDCB#PBF Datasheet PDF - Linear Technology

●The LTC4449EDCB#PBF is a high frequency Gate Driver that is designed to drive two N-Channel MOSFETs in a synchronous DC/DC converter. The powerful rail-to-rail driver capability reduces switching losses in MOSFETs with high gate capacitance. The LTC4449 features a separate supply for the input logic to match the signal swing of the controller IC. If the input signal is not being driven, the LTC4449 activates a shutdown mode that turns off both external MOSFETs. The input logic signal is internally level-shifted to the bootstrapped supply, which functions at up to 42V above ground. The LTC4449 contains under-voltage lockout circuits on both the driver and logic supplies that turn off the external MOSFETs when an under-voltage condition is present. An adaptive shoot-through protection feature is also built-in to prevent the power loss resulting from MOSFET cross-conduction current.

● Adaptive shoot-through protection

● Under-voltage lockout

● Rail-to-rail output drivers

● Separate supply to match PWM controller

● Drives dual N-channel MOSFET

● 3.2A Peak pull-up current

● 4.5A Peak pull-down current

● 8ns TG Rise time driving 3000pF load

● 7ns TG Fall time driving 3000pF load