Product category: Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LTC3418
Edited by the Electronicstalk Editorial Team on 08 June 2005
Regulator shrinks the size of 8A
supplies
The LTC3418 is a high-efficiency 4MHz synchronous buck regulator using a constant-frequency current-mode architecture.
Linear Technology has released the LTC3418, a high-efficiency 4MHz synchronous buck regulator using a constant-frequency current-mode architecture It can deliver up to 8A of continuous output current at voltages as low as 0.8V from a 5 x 7mm QFN package
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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It operates from an input voltage of 2.25 to 5.5V, making it ideal for both single cell Li-ion, or NiMH applications, as well as more general purpose 2.5 to 5V fixed rail systems.
Its switching frequency of 4MHz allows the use of tiny low cost capacitors and inductors with less than 1.5mm profile.
High frequency operation also keeps switching noise out of critical wireless and xDSL frequency ranges, making it ideal for xDSL modem, cellular basestation and automotive applications.
The LTC3418 uses internal switches with an on-resistance of only 0.035ohm to deliver efficiencies as high as 95%, while also using low dropout 100% duty cycle operation to allow output voltages equal to the input.
It has an onboard tracking input, to provide easy power sequencing.
No load quiescent current is only 380uA, and less than1uA in shutdown, making it ideal for applications such as automotive power systems that require low standby currents.
For noise sensitive applications, the sync/mode pin can also be configured to skip pulses or provide forced continuous operation to reduce noise and RF interference.
Additional features include a "power good" voltage monitor, external frequency synchronisation capability and thermal protection.
The LTC3418 provides the optimum solution for applications requiring 8A of output current, and where a small solution size and high efficiency are the defining factors.
The LTC3418 is available from stock in a 38-lead, 5 x 7mm QFN package.
Pricing starts at $6.75 each in 1000-piece quantities. Request a free brochure from Linear Technology Corp ...
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