Linear Technology Corp. (LTC, Milpitas, CA) announced the new LTC3414, a high-efficiency, 4MHz, synchronous buck regulator using a constant-frequency, current-mode architecture. The LTC3414 can deliver up to 4A of continuous output current at voltages as low as 0.8V from a thermally enhanced TSSOP-20 package.
The LTC3414 operates from an input voltage of 2.25V to 5.5V, making it suitable for single-cell, lithium-ion or nickel-metal hydride batteries, as well as more general-purpose, fixed rail systems. The LTC3414's switching maximum frequency of 4MHz allows the utilization of low-cost capacitors and inductors with less than a 1.5mm profile. High-frequency operation eliminates switching noise from critical wireless and xDSL frequency ranges, making it suitable for xDSL modems, cellular base stations and automotive applications.
The LTC3414 integrates internal MOSFET switches with an RDS(on) of only 0.067 Ohm to deliver efficiencies as high as 95%. It also utilizes low dropout, 100%, duty cycle operation to allow output voltages equal to VIN. No-load quiescent current is only 64µA, and less than 1µA in shutdown. The LTC3414 utilizes selectable Burst Mode® operation to reduce gate charge losses. Additional features include a power-good voltage monitor, external synchronization capability and thermal protection.
The LTC3414 is available from stock in a 20-lead, thermally enhanced, TSSOP package. Pricing starts at $4.95 each in 1,000-piece quantities.
