MAX1623EAP+

The MAX1623EAP+ is a 3A, low voltage, step-down regulator with synchronous rectification and internal switches in 20 pin SSOP package. This switch-mode buck regulator with synchronous rectification provides local CPU and bus-termination power in notebook and desktop computers. An internal 55Mohm (typ), 3A PMOS power switch and 60Mohm (typ), 3A NMOS synchronous-rectifier switch deliver continuous load currents up to 3A from a 5V supply with 95% typical efficiency. Output accuracy is ±1%, including line and load regulation. It features constant-off-time, current-mode pulse-width-modulation (PWM) control with switching frequencies as high as 350KHz. An external resistor at TOFF pin sets off-time allowing optimum design flexibility in terms of switching frequency, output switching noise and inductor size. It is used in CPU daughter card supply, DSP supply and desktop computer bus-termination supply.

• Input voltage range from 4.5V to 5.5V
• Operating temperature range from -40°C to +85°C
• Minimal external components
• Pin-selectable fixed 3.3V and 2.5V output voltage
• Typical supply current is 400µA
• Shutdown supply current is <lt/> 1µA
• Constant-off-time PWM operation
• Idle Mode operation at light loads
• Thermal shutdown protection

Applications

Power Management, Consumer Electronics, 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