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
ARM extends into IoT software
October 02, 2014
This year, ARM will release a free, open source operating system for Cortex-M devices and processor-agnostic IoT cloud software ...
Is there a future for the MOST bus?
Beyond programmability: full design observability at runtime
Nikola Tesla's lab could speak to future generations
Macronix rolls out European expansion plan
Intel leads non-iPad tablet processor market
October 01, 2014
Intel, which has been striving to get processor design wins in mobile devices, has made progress in the tablet computer rising ...
Farnell element14 signs global agreement with RECOM Power
Could low-power 3D nanomagnetic logic replace transistors?
Oscilloscope engine plugs into portable Apple products
- Solutions for Millimeter Wave Wireless Backhaul
- Enter Linduino
- A Novel Approach to Industrial Rectifier Systems
- Putting FPGAs to Work in Software Radio Systems Handbook
InterviewIs there a future for the MOST bus?
In no other domain in the car, the technological evolution is advancing more rapidly than in the infotainment sector. Nevertheless, the MOST data networking technology seems to maintain its position as ...
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, Oscium is giving away three of its iMSO-204L dual analogue iOS oscilloscopes, worth USD400 each. Designed with native Lightning compatibility, the iMSO-204L transforms the iPad, iPhone, and iPod touch into an ultra-portable, two-channel oscilloscope.
Since Apple changed its connector, Oscium has been working to bring native compatibility to its customers. The third generation...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.