Small AC-to-DC Converter

June 2, 2005
A dc-to-dc buck converter, the FX5545G108, delivers power density of more than 570 W/cu in. in a 20-port, surface-mount BGA package.

It measures 0.58 X 0.48 in. (4.7 X 12.2 mm) with a maximum height of 0.126 in. (3.2 mm). The device converts 2.5 to 6-V inputs to an output voltage range of 0.9 to 4.5 V with efficiencies up to 95%. The converter is rated for maximum current of 4 A and output power of 15 W, with a 1-mA shutdown current. It adjusts and stabilizes input power in point-of-load applications to a variety of semiconductor devices such as FPGAs, microprocessors, DSPs, and DDR-SDRAMs. The converter also stabilizes, filters, reduces ripple, and shifts dc-voltage levels, or stabilizes battery-voltage outputs at a specific lower voltage. Programmable PWM/PSM controls ensure ultrahigh efficiency, with the converter operating in synchronous rectified PWM mode under full load and shifting into externally controlled pulse-skipping mode under light load conditions. With 100% duty cycle control for PSM operation, the converter acts much like a saturated linear regulator to extract every bit of power from single-cell Li or triple-cell NiCd and NiMH battery packs and thus delivers the highest potential output voltage. It operates in temperatures from 40° to 85°C.

Vishay Intertechnology Inc.
63 Lincoln Highway
Malvern, PA 19355
(402) 563-6866
vishay.com

Sponsored Recommendations

The entire spectrum of drive technology

June 5, 2024
Read exciting stories about all aspects of maxon drive technology in our magazine.

MONITORING RELAYS — TYPES AND APPLICATIONS

May 15, 2024
Production equipment is expensive and needs to be protected against input abnormalities such as voltage, current, frequency, and phase to stay online and in operation for the ...

Solenoid Valve Mechanics: Understanding Force Balance Equations

May 13, 2024
When evaluating a solenoid valve for a particular application, it is important to ensure that the valve can both remain in state and transition between its de-energized and fully...

Solenoid Valve Basics: What They Are, What They Do, and How They Work

May 13, 2024
A solenoid valve is an electromechanical device used to control the flow of a liquid or gas. It is comprised of two features: a solenoid and a valve. The solenoid is an electric...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!