Power Electronics / Power Management


36 V buck regulator

22 August 2012 Power Electronics / Power Management

Analog Devices introduced the ADP2441, a 36 V, 1 A step-down regulator integrating both low-on-resistance and high-side and low-side power switches to provide compact point-of-load design and more than 94% efficiency.

Under light load conditions, the IC will automatically operate in PSM (pulse-skip mode) to reduce switching losses and improve energy efficiency.

The device supports a wide input range from 4,5 V to 36 V to accommodate a diversity of point-of-load applications including industrial and communication equipment and healthcare electronics. Output voltage is adjustable from 0,6 V to 90% of input voltage.

The new regulator also offers low minimum on-time of 50 ns, saving board space and cost through its suitability for single-stage, high-input to low-output power conversion.

By using a current-mode constant frequency PWM (pulse-width modulation) control scheme, the ADP2441 offers excellent stability and transient response to minimise output voltage ripple. The switching frequency of the regulator can be adjusted from 300 kHz to 1 MHz.

The chip offers precision enable, voltage tracking and power-good features to enable a simple and reliable startup sequence. System reliability and protection are enhanced further through over-current protection, under-voltage lockout and thermal shutdown. Operating over the -40°C to +125°C junction temperature range, the ADP2441 is available in a 3 x 3 mm 12-lead LFCSP package.

Analog Devices’ integrated power management switching regulators are also supported by the ADIsimPower design tools, which simplify selecting components, simulating power supply performance and building evaluation circuits.

For more information contact Andrew Athanasiou, Arrow Altech Distribution, +27 (0)21 555 1884, [email protected], www.arrow.altech.co.za, Avnet Kopp, +27 (0)11 809 6100, [email protected], www.avnet.co.za



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