LTC4442/LTC4442-1 High Speed Synchronous N-Channel MOSFET Drivers FEATURES DESCRIPTION Wide V Range: 6V to 9.5V The LTC 4442 is a high frequency gate driver designed CC 38V Maximum Input Supply Voltage to drive two N-channel MOSFETs in a synchronous buck Adaptive Shoot-Through Protection DC/DC converter topology. The powerful driver capabil- 2.4A Peak Pull-Up Current ity reduces switching losses in MOSFETs with high gate 5A Peak Pull-Down Current capacitance. 8ns TG Fall Time Driving 3000pF Load The LTC4442 features a separate supply for the input 12ns TG Rise Time Driving 3000pF Load logic to match the signal swing of the controller IC. If the Separate Supply to Match PWM Controller input signal is not being driven, the LTC4442 activates a Drives Dual N-Channel MOSFETs shutdown mode that turns off both external MOSFETs. Undervoltage Lockout The input logic signal is internally level-shifted to the Thermally Enhanced MSOP Package bootstrapped supply, which may function at up to 42V above ground. APPLICATIONS The LTC4442 contains undervoltage lockout circuits on Distributed Power Architectures both the driver and logic supplies that turn off the external High Density Power Modules MOSFETs when an undervoltage condition is present. The LTC4442 and LTC4442-1 have different undervoltage lockout thresholds to accommodate a wide variety of ap- plications. An adaptive shoot-through protection feature is also built-in to prevent power loss resulting from MOSFET cross-conduction current. The LTC4442/LTC4442-1 are available in the thermally enhanced 8-lead MSOP package. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION LTC4442 Driving 3000pF Capacitive Loads Synchronous Buck Converter Driver INPUT (IN) 5V/DIV V V IN CC 6V 32V BOOST BOTTOM LTC4442 GATE (BG) V TG LOGIC 5V/DIV V TS CC TOP GATE V OUT (TG-TS) PWM IN BG 5V/DIV GND 4442 TA01a 4442 TA01b 10ns/DIV 4442fb 1LTC4442/LTC4442-1 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) Supply Voltage V ......................................................... 0.3V to 10V CC V .................................................... 0.3V to 10V LOGIC BOOST TS ........................................... 0.3V to 10V TOP VIEW TG 1 8 BOOST IN Voltage .................................................. 0.3V to 10V TS 2 9 7 V CC BOOST Voltage .......................................... 0.3V to 42V GND 6 BG 3 V LOGIC GND 4 5 IN TS Voltage ..................................................... 5V to 38V MS8E PACKAGE TS + V ....................................................................42V CC 8-LEAD PLASTIC MSOP T = 125C, = 40C/W Driver Output TG (with Respect to TS) ....... 0.3V to 10V JMAX JA EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB Driver Output BG ........................................ 0.3V to 10V 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 LTC4442EMS8E PBF LTC4442EMS8E TRPBF LTCTJ 8-Lead Plastic MSOP 40C to 85C LTC4442IMS8E PBF LTC4442IMS8E TRPBF LTCTJ 8-Lead Plastic MSOP 40C to 85C LTC4442EMS8E-1 PBF LTC4442EMS8E-1 TRPBF LTCXR 8-Lead Plastic MSOP 40C to 85C LTC4442IMS8E-1 PBF LTC4442IMS8E-1 TRPBF LTCXR 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: