LTC4446 High Voltage High Side/ Low Side N-Channel MOSFET Driver FEATURES DESCRIPTION n Bootstrap Supply Voltage Up to 114V The LTC 4446 is a high frequency high voltage gate driver n Wide V Voltage: 7.2V to 13.5V that drives two N-channel MOSFETs in a DC/DC converter CC n 2.5A Peak Top Gate Pull-Up Current with supply voltages up to 100V. The powerful driver ca- n 3A Peak Bottom Gate Pull-Up Current pability reduces switching losses in MOSFETs with high n 1.2 Top Gate Driver Pull-Down gate capacitance. The LTC4446s pull-up for the top gate n 0.55 Bottom Gate Driver Pull-Down driver has a peak output current of 2.5A and its pull-down n 5ns Top Gate Fall Time Driving 1nF Load has an output impedance of 1.2. The pull-up for the bot- n 8ns Top Gate Rise Time Driving 1nF Load tom gate driver has a peak output current of 3A and the n 3ns Bottom Gate Fall Time Driving 1nF Load pull-down has an output impedance of 0.55. n 6ns Bottom Gate Rise Time Driving 1nF Load The LTC4446 is con gured for two supply-independent n Drives Both High and Low Side N-Channel MOSFETs inputs. The high side input logic signal is internally n Undervoltage Lockout level-shifted to the bootstrapped supply, which may n Thermally Enhanced 8-Pin MSOP Package function at up to 114V above ground. The LTC4446 contains undervoltage lockout circuits that APPLICATIONS disable the external MOSFETs when activated. n Distributed Power Architectures The LTC4446 is available in the thermally enhanced 8-lead n Automotive Power Supplies MSOP package. n High Density Power Modules The LTC4446 does not have adaptive shoot-through pro- n Telecommunication Systems tection. For similar drivers with adaptive shoot-through L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. protection, please refer to the chart below. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 6677210. PARAMETER LTC4446 LTC4444 LTC4444-5 Shoot-Through Protection No Yes Yes Absolute Max TS 100V 100V 100V MOSFET Gate Drive 7.2V to 13.5V 7.2V to 13.5V 4.5V to 13.5V + V UV 6.6V 6.6V 4V CC V UV 6.15V 6.15V 3.55V CC TYPICAL APPLICATION Two Switch Forward Converter LTC4446 Driving a 1000pF Capacitive Load V IN BINP V CC 36V TO 72V 5V/DIV 7.2V TO 13.5V (100V ABS MAX) BG BOOST 10V/DIV V TG CC LTC4446 TINP PWM1 5V/DIV TINP TS (FROM CONTROLLER IC) TO PWM2 SECONDARY TG-TS BINP BG (FROM CONTROLLER IC) CIRCUIT 10V/DIV GND 4446 TA01b 20ns/DIV 4446 TA01a 4446f 1LTC4446 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) Supply Voltage TOP VIEW TINP 1 8 TS V ......................................................... 0.3V to 14V CC BINP 2 7 TG 9 BOOST TS ........................................... 0.3V to 14V V 3 6 BOOST CC BG 4 5 NC TINP Voltage ................................................. 2V to 14V MS8E PACKAGE BINP Voltage ................................................. 2V to 14V 8-LEAD PLASTIC MSOP BOOST Voltage ........................................ 0.3V to 114V T = 125C, = 40C/W, = 10C/W (NOTE 4) JMAX JA JC EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB TS Voltage ................................................... 5V to 100V Operating Temperature Range (Note 2).... 40C to 85C Junction Temperature (Note 3) ............................. 125C Storage Temperature Range ................... 65C to 150C Lead Temperature (Soldering, 10 sec) .................. 300C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC4446EMS8E PBF LTC4446EMS8E TRPBF LTDPZ 8-Lead Plastic MSOP 40C to 85C LTC4446IMS8E PBF LTC4446IMS8E TRPBF LTDPZ 8-Lead Plastic MSOP 40C to 85C Consult LTC Marketing for parts speci ed with wider operating temperature ranges. *The temperature grade is identi ed by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based nish parts. For more information on lead free part marking, go to: