DC-DC regulator

7 March 2012 Power Electronics / Power Management

The ADP2164 from Analog Devices is a 6,5 V, 4 A output DC-to-DC regulator featuring a conversion efficiency of greater than 96%. The highly integrated device offers an input voltage supply range of 2,7 V to 6,5 V, an output range as low as 0,6 V, and includes low on-resistance switching FETs.

Housed in a compact 4 x 4 mm QFN 16-lead package, the regulator is designed for multirail, point-of-load applications ranging from communication infrastructure to industrial devices that demand small size, fast transient performance and highly accurate voltage regulation. Unlike other 5 V regulators, the maximum input range of the ADP2164 is 6,5 V, which provides additional safety headroom.

The IC features a synchronisation input and selectable phase-shift to minimise input ripple current and reduce input filter design complexity. A precision-enable input, voltage tracking input and power-good feature enable a simple and reliable startup sequence

The ADP2164’s switching frequency can be programmed from 500 kHz to 1,4 MHz or synchronised to an external clock to eliminate beat frequencies between regulators. Two ADP2164 regulators can also be synchronised 180° out of phase to reduce input current ripple and the size of the input capacitance. The regulator is based on a current-mode, fixed-frequency PWM architecture that provides excellent stability and transient response, and is pin-compatible with the ADP2118 5 V 3 A synchronous regulator. Designed for high efficiency multirail applications, the ADP2164 operates over the 40°C to +125°C junction temperature range.

For more information contact Stella Homan, Avnet Kopp, +27 (0)11 809 6100, [email protected], www.avnet.co.za

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