MAX8537, MAX8538, MAX8539 Dual-Synchronous Buck Controllers For Point-of-Load, Tracking, And DDR Memory Power Supplies

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 point-of-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 constant-frequency voltage-mode architecture with operating frequencies of 200kHz to 1.4MHz. An internal high- bandwidth (25MHz) Operational Amplifier is used as an error Amplifier to regulate the output voltage. This allows fast transient response, reducing the number of output capacitors. An all-N-FET design optimizes efficiency and cost. The MAX8537 MAX8538 MAX8539 have a 1% accurate reference. The second synchronous buck controller in the MAX8537 MAX8539 and the VTTR Amplifier generate 1/2 VDDQ voltage for VTT and VTTR, and track the VDDQ within 1%.
This family of controllers uses a high-side current-sense architecture for current limiting. ILIM pins allow the setting of an adjustable, lossless current limit for different combinations of load current and RDSON. Alternately, more accurate overcurrent limit is achieved by using a sense resistor in series with the high-side FET Overvoltage protection is achieved by latching off the high-side MOSFET and latching on the low-side MOSFET when the output voltage exceeds 17% of its set output. Independent enable, power-good, and soft-start features enhance flexibility.
By Maxim Integrated Products
Part Manufacturer Description Datasheet Samples
MAX8538EVKIT Maxim Integrated Products Evaluation Kit for the MAX8538
MAX8538EEI+ Maxim Integrated Products Dual Switching Controller, Voltage-mode, 0.07A, 1680kHz Switching Freq-Max, BICMOS, PDSO28, 0.150 INCH, 0.025 INCH PITCH, LEAD FREE, MO-137AF, QSOP-28
MAX8538EEI+T Maxim Integrated Products Dual Switching Controller, Voltage-mode, 0.07A, 1680kHz Switching Freq-Max, BICMOS, PDSO28, 0.150 INCH, 0.025 INCH PITCH, LEAD FREE, MO-137AF, QSOP-28
MAX8538EEI-T Maxim Integrated Products Dual Switching Controller, Voltage-mode, 0.07A, 1680kHz Switching Freq-Max, BICMOS, PDSO28, 0.150 INCH, 0.025 INCH PITCH, MO-137AF, QSOP-28
MAX8538EEI Maxim Integrated Products Dual Switching Controller, Voltage-mode, 0.07A, 1680kHz Switching Freq-Max, BICMOS, PDSO28, 0.150 INCH, 0.025 INCH PITCH, MO-137AF, QSOP-28
MAX8538 's PackagesMAX8538 's pdf datasheet
MAX8538EEIT QSOP
MAX8538EEI QSOP
MAX8538EEI-T QSOP




MAX8538 Pinout, Pinouts
MAX8538 pinout,Pin out
This is one package pinout of MAX8538,If you need more pinouts please download MAX8538's pdf datasheet.

MAX8538 Application circuits
MAX8538 circuits
This is one application circuit of MAX8538,If you need more circuits,please download MAX8538's pdf datasheet.


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