Dual-Synchronous Buck Controllers
19-3141; Rev 0; 1/04 EVAALVUAAILTAIOBNLEKIT
Dual-Synchronous Buck Controllers for Point-ofLoad, Tracking, and DDR Memory...
Description
19-3141; Rev 0; 1/04 EVAALVUAAILTAIOBNLEKIT
Dual-Synchronous Buck Controllers for Point-ofLoad, Tracking, and DDR Memory Power Supplies
MAX8537/MAX8538/MAX8539
General Description
The MAX8537/MAX8539 controllers provide a complete power-management solution for both double-data-rate (DDR) and combiner supplies. The MAX8537 and MAX8539 are configured for out-of-phase and in-phase DDR power-supply operations, respectively, and generate three outputs: the main memory voltage (VDDQ), the tracking sinking/sourcing termination voltage (VTT), and the termination reference voltage (VTTR). The MAX8538 is configured as a dual out-of-phase controller for pointof-load supplies. Each buck controller can source or sink up to 25A of current, while the termination reference can supply up to 15mA output.
The MAX8537/MAX8538/MAX8539 use constantfrequency voltage-mode architecture with operating frequencies of 200kHz to 1.4MHz. An internal highbandwidth (25MHz) operational amplifier is used as an error ...
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