LTC4444-5 Datasheet

• Bootstrap Supply Voltage to 114V
• Wide V_CC Voltage: 4.5V to 13.5V
• Adaptive Shoot-Through Protection
• 1.4A Peak Top Gate Pull-Up Current
• 1.75A Peak Bottom Gate Pull-Up Current
• 1.5Ω Top Gate Driver Pull-Down
• 0.75Ω Bottom Gate Driver Pull-Down
• 5ns Top Gate Fall Time Driving 1nF Load
• 8ns Top Gate Rise Time Driving 1nF Load
• 3ns Bottom Gate Fall Time Driving 1nF Load
• 6ns Bottom Gate Rise Time Driving 1nF Load
• Drives Both High and Low Side N-Channel MOSFETs
• Undervoltage Lockout
• Thermally Enhanced 8-Pin MSOP Package

• Distributed Power Architectures
• Automotive Power Supplies
• High Density Power Modules
• Telecommunication Systems

The LTC4444-5 is a high frequency high voltage gate driver that drives two N-channel MOSFETs in a synchronous DC/DC converter with supply voltages up to 100V. This powerful driver reduces switching losses in MOSFETs with high gate capacitance.

The LTC4444-5 is configured for two supply-independent inputs. The high side input logic signal is internally level-shifted to the bootstrapped supply, which may function at up to 114V above ground.

The LTC4444-5 contains undervoltage lockout circuits that disable the external MOSFETs when activated. Adaptive shoot-through protection prevents both MOSFETs from conducting simultaneously.