100-V synchronous N-channel MOSFET drivers operate from -40 to 150 degrees C
February 18, 2011 // Paul Buckley
Linear Technology Corporation has introduced the H-grade version of the LTC4444/-5, a high-speed, high input supply voltage (100 V), synchronous MOSFET gate driver designed to drive upper and lower power N-channel MOSFETs in synchronous rectified converter topologies.
The driver, combined with power MOSFETs and one of Linear Technology’s many DC/DC controllers, forms a complete high efficiency synchronous regulator. The LTC4444H/-5 operates over a junction temperature range of -40 to 150°C, compared to the I-grade version’s -40 to 125°C operating temperature range.
Adaptive shoot-through protection is integrated to minimize dead time while preventing both the upper and lower MOSFETs from conducting simultaneously. These powerful drivers can source up to 1.4 A with a 1.5 Ohm pull-down impedance for driving the top MOSFET and a source current of 1.75 A with a 0.75 Ohm pull-down impedance for the bottom MOSFET, making it ideal for driving high gate capacitance, high current MOSFETs. The LTC4444H/-5 can drive multiple MOSFETs in parallel for higher current applications. Switching losses are minimized by the fast 8 ns rise, 5ns fall time of the top MOSFET and 6 ns rise, 3 ns fall time of the bottom MOSFET when driving a 1,000 pF load.
The LTC4444H/-5 is configured for two supply independent inputs. The high-side input logic signal is internally level-shifted to the bootstrap supply, which can function at up to 114 V above ground. The LTC4444-5 drives both upper and lower MOSFET gates over a range of 4.5 V to 13.5 V and the LTC4444 drives both upper and lower MOSFET gates over a range of 7.2 V to 13 V.
Availability and Pricing
Both parts are available in a thermally enhanced MSOP-8 package. Pricing starts at $2.00 each in 1,000-piece quantities.
More information about the LTC4444/-5 synchronous MOSFET gate driver at
Ten deals that shaped analog, MEMS and sensors in 2014
December 22, 2014
The company merger and acquisition trend that characterized 2013 was still present in 2014 but was, perhaps, slightly less ...
Silicon more-than-Moore to drive MEMS, RF, LEDs
Goepel expands collaboration network in Asia
Alstom partners NTU Singapore to develop microgrid solution
Graphene oxide discovery helps boost rechargeable batteries
Endoscopic measurement method allows quieter, more reliable jet engines
December 21, 2014
A team of scientists from German aerospace research centre DLR has developed an optical measurement method that enables direct ...
Pathway to converting sunlight to electricity is indentified
How industrial IoT will drive the MEMS market indirectly
Successful with phones & drones, Parrot ponders farming
- New life for Embedded systems in the Internet of Things
- Virtualization and the Internet of Things
- RF/Microwave Instrumentation “S” Series Amplifiers
- Application Guide to RF Coaxial Connectors and Cables
InterviewCEO interview: Bosch's IoT startup is all about the system
Thorsten Mueller, CEO of Bosch Connected Devices and Solutions GmbH (Reutlingen, Germany), has been guiding the latest startup subsidiary of Robert Bosch GmbH since 2013 when he started the initiative ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Arrow Electronics is giving away ten BeMicro Max 10 FPGA evaluation boards together with an integrated USB-Blaster, each package being worth 90 Euros, for EETimes Europe's readers to win.
Designed to get you started with using an FPGA, the BeMicro Max 10 adopts Altera's non-volatile MAX 10 FPGA built on 55-nm flash process.
The MAX 10 FPGAs are claimed to revolutionize...MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.