Product category:
Power Supply ICs and Controllers
News Release from: Vishay Siliconix | Subject: Little Foot Plus drivers
Edited by the Electronicstalk Editorial
Team on 17 June 2003
Drivers integrate MOSFETs with drive
circuitry
Five new Little Foot Plus driver products are designed to simplify the use of N-channel MOSFETs in high-frequency buck regulators.
Siliconix has released five new Little Foot Plus driver products designed to simplify the use of N-channel mosfets in high-frequency buck regulators With efficiencies better or comparable to competing implementations in the MLF/QFN/Power Block packages, these new devices in the Little Foot SO16 feature a 38% or smaller standard footprint, simplifying design, assembly, soldering, and layout
This article was originally published on Electronicstalk on 17 Jun 2003 at 8.00am (UK)
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The N-channel Si4738CY (20V), Si4770CY (20V), Si4724CY (30V), Si4732CY (30V) and Si4768CY (30V) synchronous mosfets with integrated driver circuitry are designed to extend battery life and/or enable more efficient use of power.
Applications will include high-frequency, multiphase DC/DC switch-mode power supplies for CPU core, graphics control, chipset, and auxiliary power in systems including desktop computers, servers, workstations, notebook computers and tablet PCs, and point-of-load (POL) applications for fixed telecomms systems.
With optimised on-resistance values and "shoot-through" protection for low-side operation, and gate-to-drain Q optimisation for high-side operation, the new devices provide high efficiency while enabling an integrated board layout with significant space savings over discrete solutions.
By integrating two mosfets and a driver in a compact SO16 package, the Vishay Siliconix devices released today offer reduced gate-drive losses and higher switching frequencies while simplifying board layout and allowing designers to implement less-complicated controller solutions.
The Si4724CY also features an integrated Schottky diode, further reducing the number of components required on the printed circuit board.
Each device features a switching frequency of up to 700kHz+, driver impedance of 1or 3ohm, and operation down to 4.5V, as well as break-before-make action and undervoltage lockout.
Samples and production quantities of the new Little Foot Plus driver products are available now with lead times of 10 to 12 weeks for larger orders.
Pricing for US delivery in 100,000-piece quantities ranges from $2.10 to $2.92.
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