Product category:
Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LTC4442/-1
Edited by the Electronicstalk Editorial
Team on 03 March 2008
Driver deals with heavyweight MOSFETs
High-speed synchronous MOSFET driver is designed to drive upper and lower N-channel power MOSFETs in a synchronous rectified convertor topology.
The LTC4442/-1 is a high-speed synchronous MOSFET driver designed to drive upper and lower N-channel power MOSFETs in a synchronous rectified convertor topology This Linear Technology driver can be combined with a number of the company's DC/DC controllers to form a complete high-efficiency synchronous regulator that can be used as a step-down or step-up DC/DC convertor
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
Related stories
Card power chip meets smart and SIM standards
The LTC4557 is a dual SIM/smart-card power supply and level translator, which provides both 1.8 and 3V SIM power and digital signal level shifting from a 3 x 3mm QFN package.
RF mixers take transformers onboard
Linear Technology has released two new high linearity up-converting RF active mixers with integrated RF transformers.
This powerful driver can sink up to 5A and source up to 2.4A, making it ideal for driving high-gate-capacitance high-current MOSFETs.
The LTC4442/-1 can also drive multiple MOSFETs in parallel for higher current applications.
The fast 12ns rise time, 8ns fall time of the top MOSFET and 12ns rise time, 5ns fall time of the bottom MOSFET, when driving a 3000pF load, minimise switching losses.
Adaptive shoot-through protection is integrated to prevent both the upper and lower MOSFETs from conducting simultaneously, minimising dead time.
The LTC4442/-1 has a tristate PWM input for power stage shutdown that is compatible with all multiphase controllers employing a tristate output feature.
In addition, it has a separate supply for the input logic to match the signal swing of the controller IC and has an undervoltage lockout circuit on both the driver and logic supplies.
Furthermore, this part drives both upper and lower MOSFET gates over a 6.2 to 9.5V range and operates up to a 38V supply voltage.
The -1 version has a higher VCC undervoltage lockout of 6.2 instead of 3.2V, intended to drive standard 5V logic N-channel MOSFETs.
The LTC4442/-1 is offered in a thermally enhanced MSOP-8 package, operating over the -40 to +85C temperature range, priced starting at US $1.25 for 1000-piece quantities. Request a free brochure from Linear Technology Corp ...
• Linear Technology Corp: contact details and other news
• Email this article to a colleague
• Register for the free Electronicstalk email newsletter
• Electronicstalk Home Page
Search the Pro-Talk network of sites
