LTC4444-5 Datasheet | Linear Technology

Features n Bootstrap Supply Voltage to 114V n Wide VCC Voltage: 4.5V to 13.5V n Adaptive Shoot-Through Protection n 1.4A Peak Top Gate Pull-Up Current n 1.75A Peak Bottom Gate Pull-Up Current n 1.5Ω Top Gate Driver Pull-Down n 0.75Ω Bottom Gate Driver Pull-Down n 5ns Top Gate Fall Time Driving 1n F Load n 8ns Top Gate Rise Time Driving 1n F Load n 3ns Bottom Gate Fall Time Driving 1n F Load n 6ns Bottom Gate Rise Time Driving 1n F Load n Drives Both High and Low Side N-Channel MOSFETs n Undervoltage Lockout n Thermally Enhanced 8-Pin MSOP Package APPLICATIONS n Distributed Power Architectures n Automotive Power Supplies n High Density Power Modules n Telemunication Systems L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and No RSENSE is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 6677210. High Voltage Synchronous N-Channel MOSFET Driver DESCRIPTION The LTC®4444-5 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. For a similar driver in this product family, please refer to the chart below. PARAMETER Shoot-Through Protection Absolute Max TS MOSFET Gate Drive VCC UV+ VCC UV- LTC4444-5 Yes 100V 4.5V to 13.5V 4V 3.5V LTC4446 No 100V 7.2V to 13.5V 6.6V 6.15V LTC4444 Yes 100V 7.2V to 13.5V 6.6V 6.15V TYPICAL APPLICATION High Input Voltage Buck Converter VCC...