MAX845EUA+

The MAX845EUA+ is an isolated transformer driver for PCMCIA applications in 8 pin µMAX package. It drives a low-profile centre tapped transformer primary from a 5V or 3.3V DC power supply. The secondary can be wound to provide any isolated positive or negative voltage at powers up to 750mW. The MAX845 consists of an oscillator followed by a toggle flip-flop. The flip-flop generates two 50% duty cycle square waves which are complementary at half the oscillator frequency (450KHz, min). These two signals drive the ground-referenced N-channel power switches. Internal circuitry ensures break-before-make action between the two switches. A low power shutdown disables both the switches and the oscillator, reducing power consumption. Typical applications include PCMCIA modem cards, isolated data acquisition, isolated interface power supply, noise-immunity communications interface, bridging ground differences, process control and low power LAN networks.

• Supply voltage range is 2.5V to 6V
• Operating temperature range from -40°C to 85°C
• Minimum switching frequency is 450KHz
• Ultra low input supply current ripple
• Low power shutdown reduces the supply current to 5μW
• Low output ripple permits miniature output capacitors

Note

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party