Maxim Intros MAX5039 and MAX5040 Controller ICs

Maxim Integrated Products Inc. (Sunnyvale, CA) introduced the MAX5039 and MAX5040 voltage-tracking controllers, which provide intelligent control to power systems where two power supplies need to track and limit the voltage difference during power-up and power-down. The MAX5039/MAX5040 integrated circuits are suitable for voltage tracking of I/O and core power supplies for PowerPC®, DSPs and ASICs, preventing latchup and ensuring long-term reliability.

Both the MAX5039 and MAX5040 drive an external n-channel MOSFET connected between the two voltage rails, allowing less than 200mV deviation between input/output and core voltage during power-up and power-down. In addition, the devices detect short-circuit on both supplies, and disable the power supplies in case of a short-circuit condition.

The MAX5039 and MAX5040 operate from a 2.5V to 5.5V supply voltage. They provide tracking for core voltages (VCORE) of 0.8V to 4V and I/O voltages of VCORE to 4V. The MAX5040 has the same functionality as the MAX5039, but also includes an auxiliary comparator for voltage monitoring and a power-good output.

The MAX5039 and MAX5040 are available in 8-pin and 10-pin microMAX packages, respectively, and are rated for operation over the extended industrial temperature range of -40 to +85 degrees C. Prices start at $0.98 for the MAX5039 and $1.14 for the MAX5040 for quantities of 1,000 and more.