Automotive buck converters

16 July 2014 Power Electronics / Power Management

The MAX20002 and MAX20003 are small, synchronous buck converters with integrated high-side and low-side MOSFETs.

Each device is designed to deliver up to 2 A/3 A with input voltages from 3,5 V to 36 V, while using only 15 μA quiescent current at no load. Voltage quality can be monitored by observing the PGOOD signal and operation is possible in dropout by running at 98% duty cycle, making them ideal for automotive applications.

Made by Maxim Integrated, the devices offer fixed output voltages of 5 V/3,3 V, along with the ability to program the output voltage between 1 V and 10 V. Frequency can be programmed using a resistor from 220 kHz to 2,2 MHz. The chips offer a forced fixed-­frequency mode and skip mode, and include a pin that can be programmed to turn on/off the spread spectrum to aid EMC management.

Targeted at use in distributed DC power systems, navigation and radio head units, and point-of-load automotive applications in, the MAX20002/3 are available in a 5 x 5 mm, 20-pin TQFN package with exposed pad and require very few external components.

For more information contact Arnold Perumal, Avnet Kopp, +27 (0)11 319 8600, arnold.perumal@avnet.eu, www.avnet.co.za

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