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Step-down regulator delivers 12A output at 0.6V

Posted: 06 Sep 2007 ?? ?Print Version ?Bookmark and Share

Keywords:synchronous buck regulator?

Linear Technology Corp. has released the LTC3610 synchronous buck regulator which can deliver up to 12A of continuous output current at voltages as low as 0.6V.

The chip operates from an input voltage of 4V to 24V (28V ABS Max), making it suitable for applications with multicell Li-ion, lead acid batteries or fixed voltage rails up to 24V. Its valley current control architecture delivers very low duty cycle operation at high frequencies with high transient response. The operating frequency is set by an external resistor. Switching frequencies of up to 1MHz allow the utilization of small, low cost ceramic capacitors and low profile inductors.

The LTC3610 uses internal switches with an RDS(ON) of only 12m and 6.5m to deliver efficiencies as high as 95 percent. The LTC3610 can be configured for discontinuous or forced continuous operation. Forced continuous operation reduces noise and RF interference while discontinuous mode provides high efficiency by reducing switching losses at light loads while requiring only 900?A of quiescent current. No load quiescent current is only 15?A. Additional features include a Power Good voltage monitor, adjustable current limit, output overvoltage protection and programmable soft-start.

The LTC3610 is available from stock in a 64-lead, 9mm x 9mm QFN package. Pricing starts at $8.50 in 1,000-piece quantities

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