Sunnyvale, Calif. Maxim Integrated Products has introduced the MAX5098A and MAX5099 dual-output, high-switching-frequency dc/dc converters capable of delivering 2 A and 1 A of output current. Designed to operate directly from a car battery, these converters integrate load-dump protection circuitry to handle transients up to 80 V, and they operate down to 4.5 V to withstand cold-crank conditions.
The MAX5098A/MAX5099 devices feature a 200 kHz to 2.2MHz programmable switching frequency range, allowing them to operate outside of the AM radio band. The wide switching frequency range in combination with robust protection features makes the devices well-suited for automotive applications such as head units, instrument-cluster displays, and car radios.
These dc/dc converters can operate 180 degrees out-of-phase with an adjustable switching frequency. This capability minimizes external component count while allowing the designer to make trade-offs between size, efficiency, and cost. In addition, the MAX5098A/MAX5099 utilize voltage-mode control for stable operation and external compensation so that the loop gain is tailored to optimize component selection and transient response.
Integrating an n-channel MOSFET that can be used in a high-side or low-side configuration, these devices can be configured either as boost or buck converters. The MAX5099 also integrates two low-side MOSFET drivers for synchronous operation.
The MAX5098A/MAX5099 devices are available in a thermally enhanced, 5 x 5-mm, 32-pin TQFN package with an exposed pad. They are fully specified over the -40°C to +125°C automotive temperature range.
Maxim Integrated Products , 1-800-998-8800, www.maxim-ic.com