Update: 30 September, 2023
The MAX5099 is a dual output, high switching frequency DC-DC buck converter with an integrated high side switch. The MAX5099 integrates two low side MOSFET drivers to allow each converter to drive an external synchronous rectifier MOSFET. Converter 1 delivers up to 2A output current, and converter 2 can deliver up to 1A of output current. The MAX5099 integrates load dump protection circuitry that is capable of handling load dump transients up to 80V for automotive applications. The load dump protection circuit utilizes an internal charge pump to drive the gate of an external n-channel MOSFET. When an overvoltage or load dump condition occurs, the series protection MOSFET absorbs the high voltage transient to prevent damage to lower voltage components. The DC-DC converter operates over a wide 4.5V to 19V operating voltage range. The MAX5099 operates 180° out of phase with an adjustable switching frequency to minimize external components while allowing the ability to make trade-offs between the size, efficiency, and cost. The high switching frequency also allows these devices to operate outside the AM band for automotive applications. These regulators can be protected against high voltage transients such as a load dump condition by using the integrated overvoltage controller. This device utilizes voltage-mode control for stable operation and external compensation, so that the loop gain is tailored to optimize component selection and transient response.
File format: PDF
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MD5 Checksum: 4F2617423C7E79C6A93A288E725059FC
Publication date: 04 May, 2012
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