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
A tech correction is coming
November 30, 2015
A tech correction is coming. The only remaining question marks are when it will happen and how bad it will be. Let's take ...
Delayed roadmap set for debut at TSensors Summit
Tower buys Maxim's Texas wafer fab
Deterministic motor control with FPGAs
LG Display plans multi-billion dollar OLED plant investment
Hybrid sensor spots cable fires before they start burning
November 27, 2015
Scientists of KIT and Karlsruhe University of Applied Sciences have developed hybrid sensors that can detect smoldering cable ...
Smart buildings, smartphones will drive IR detector market
Private ID as a service leverages smartphone-enabled biometrics
Like Micron, SK Hynix rejects Chinese advances
- Battery Size Matters
- Software-Defined Radio Handbook - 11th edition
- Multichemistry Buck Battery Charger Controller
- Automotive Circuit Protection using Littelfuse Automotive TVS Diodes
InterviewCEO interview: InvenSense's Abdi on expanding MEMS horizons
InvenSense Inc. is a MEMS company that has epitomized a fabless approach to a sector that is still highly reliant on a thorough grasp of the manufacturing and packaging processes. We interviewed CEO Behrooz ...
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, Microsemi is giving away two SmartFusion2 dual-axis motor control starter kits, worth 9 each, for EETimes Europe's readers to win.
The kit will let you try out Microsemi's deterministic motor control solution, compliant with industry coding standards for developing safe and reliable software for embedded applications.
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.