This article needs additional citations for. Unsourced material may be challenged and removed. (January 2009) () A buck converter ( step-down converter) is a which steps down voltage (while stepping up current) from its input (supply) to its output (load). It is a class of (SMPS) typically containing at least two semiconductors (a and a, although modern buck converters frequently replace the diode with a second transistor used for synchronous rectification) and at least one energy storage element, a,, or the two in combination. To reduce voltage ripple, filters made of capacitors (sometimes in combination with inductors) are normally added to such a converter's output (load-side filter) and input (supply-side filter).

How to Boost Performance in Synchronous Buck Converter Designs. A synchronous buck converter has MOSFET losses. When paired with external 5-V gate drivers.

Description The LTC4442 is a high frequency gate driver designed to drive two N-channel MOSFETs in a synchronous buck DC/DC converter topology. The powerful driver capability reduces switching losses in MOSFETs with high gate capacitance. The LTC4442 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 LTC4442 activates a shutdown mode that turns off both external MOSFETs. The input logic signal is internally level-shifted to the bootstrapped supply, which may function at up to 42V above ground. The LTC4442 contains undervoltage lockout circuits on both the driver and logic supplies that turn off the external MOSFETs when an undervoltage condition is present.

The LTC4442 and LTC4442-1 have different undervoltage lockout thresholds to accommodate a wide variety of applications. An adaptive shoot-through protection feature is also built-in to prevent power loss resulting from MOSFET cross-conduction current. Hp Designjet 650c Driver Windows 7 X64. The LTC4442/LTC4442-1 are available in the thermally enhanced 8-lead MSOP package. Packaging CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints. • For complete and up to date package information and drawings, please refer to our Part Number Package Code Temp Package Drawing RoHS LTC4442EMS8E-1#PBF MS-8E MS8E E LTC4442EMS8E-1#TRPBF MS-8E MS8E E LTC4442EMS8E#PBF MS-8E MS8E E LTC4442EMS8E#TRPBF MS-8E MS8E E LTC4442IMS8E-1#PBF MS-8E MS8E I LTC4442IMS8E-1#TRPBF MS-8E MS8E I LTC4442IMS8E#PBF MS-8E MS8E I LTC4442IMS8E#TRPBF MS-8E MS8E I. Order Info • Part numbers ending in PBF are. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available.

Please contact LTC marketing for information. • Part numbers containing TR or TRM are shipped in, respectively • Please refer to our or the product datasheet for more details Package Variations and Pricing Part Number Package Temp Price (1-99) Price (1k) * RoHS E $1.79 $1.25 E $1.31 E $1.79 $1.25 E $1.31 I $1.99 $1.39 I $1.45 I $1.99 $1.39 I $1.45 • * The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology.