The MAX5098A is a dual-output, high-switching-frequency DC-DC converter with integrated N-channel switches that can be used either in high-side or low-side configuration. Each output can be configured either as a buck converter or a boost converter. In the buck configuration, this device delivers up to 2A from converter 1 and 1A from converter 2. The MAX5098A also integrates a 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 converters operate over a wide operating voltage range from 4.5V to 19V. The MAX5098A 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 (up to 2.2MHz) also allows this device to operate outside the AM band for automotive applications. This device utilizes voltage-mode control for stable operation and external compensation, thus the loop gain is tailored to optimize component selection and transient response. This device can be synchronized to an external clock fed at the SYNC input. Also, a clock output (CK) is provided.
The MAX5098A is a dual‑output, high‑frequency DC‑DC converter that can operate in buck or boost mode for each output. It delivers up to 2 A on converter 1 and 1 A on converter 2, and includes an internal load‑dump protection circuit capable of handling transients up to 80 V for automotive use.
The device operates from 4.5 V to 19 V input, offers programmable switching frequencies from 200 kHz to 2.2 MHz, and is available in a thermally‑enhanced 32‑pin TQFN‑EP package rated for –40 °C to +125 °C. Features include digital soft‑start, individual enable pins, open‑drain power‑good outputs, and synchronization capabilities.
| Input Voltage Range | 4.5 V to 19 V |
|---|---|
| Switching Frequency Range | 200 kHz to 2.2 MHz |
| Load‑Dump Protection Voltage | 80 V |
| Operating Temperature Range | -40 °C to +125 °C |
| Efficiency (example condition) | 76 % at V+ = 12 V, Vout2 = 3.3 V, Iout2 = 0.75 A |
The converter can be programmed up to 2.2 MHz.
It includes load‑dump protection capable of handling up to 80 V transients.
It is rated for –40 °C to +125 °C.