MAX1972EEE+

The MAX1972EEE+ is a dual, 180° out-of-phase, 1.4MHz, 750mA step down regulator with POR and RSI/PFO in 16 pin QSOP package. It is a dual-output current mode PWM buck regulators operate from 2.6V to 5.5V input and deliver a minimum of 750mA on each output. It operates at a fixed 1.4MHz to reduce output inductor and capacitor size and cost. Switching the regulators 180° out-of-phase also reduces the input capacitor size and cost. Ceramic capacitors can be used for input and output. The output voltages are programmable from 1.2V to VIN using external feedback resistors, or can be preset to 1.8V or 3.3V for output 1 and 1.5V or 2.5V for output 2. When one output is higher than 1.2V, the second can be configured down to sub-1V levels. Output accuracy is better than ±1% over variations in load, line and temperature. Internal soft-start reduces inrush current during start-up.

• Current mode, 1.4MHz fixed frequency PWM operation
• ±1% output accuracy over load, line and temperature ranges
• 750mA output current
• Power-on reset delay of 175ms
• Power fail output
• Operation outside xDSL band
• Ultra compact design with smallest external components
• All ceramic capacitor application
• Soft-start reduces inrush current
• Operating temperature range from -40°C to +85°C
• Copper Gigabit SFP and GBIC Modules; Dual LDO Replacement; USB-Powered Devices; XDSL Modems; xDSL Routers

Applications

Power Management, Communications & Networking

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