MAX1842EEE+

The MAX1842EEE+ is a 1A/2.7A, 1MHz, step down regulator with synchronous rectification and internal switch in 16 pin QSOP package. The constant-off-time, PWM step down DC to DC converter is ideal for use in 5V and 3.3V to low voltage conversion. The internal 90mohm PMOS power switch and 70mohm NMOS synchronous-rectifier switch easily deliver continuous load currents up to 1A. The MAX1842 produce a preset 2.5V, 1.8V or 1.5V output voltage or an adjustable output from 1.1V to VIN. It uses a unique current-mode, constant-off-time, PWM control scheme which includes Idle Mode™ to maintain high efficiency during light-load operation. The programmable constant-off-time architecture sets switching frequencies up to 1MHz and designed for continuous output current of up to 1A. The MAX1842 has a higher current limit of 3.1A (min) and is intended for applications requiring an occasional burst of output current up to 2.7A.

• ±1% output accuracy
• 95% efficiency
• 600μA (max) operating supply current
• <lt/>1μA shutdown supply current
• Programmable constant-off-time operation
• 1MHz (max) switching frequency
• Idle mode operation at light loads
• Thermal shutdown, 100% duty cycle during low-dropout operation
• Adjustable soft-start inrush current limiting
• Output short-circuit protection, operating temperature range from -40°C to 85°C
• 5V or 3.3V to Low-Voltage Conversion; Chipset Supplies; CPU I/O Ring; Notebook and Subnotebook Computers

Applications

Portable Devices

Warnings

Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.

Notes

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