The MAX5038A/MAX5041A dual-phase, PWM controllers provide high-output-current capability in a compact package with a minimum number of external components. The MAX5038A/MAX5041A utilize a dual-phase, average-current-mode control that enables optimal use of low RDS(ON) MOSFETs, eliminating the need for external heatsinks even when delivering high output currents. Differential sensing enables accurate control of the output voltage, while adaptive voltage positioning provides optimum transient response. An internal regulator enables operation with input voltage ranges of +4.75V to +5.5V or +8V to +28V. The high switching frequency, up to 500kHz per phase, and dual-phase operation allow the use of low-output inductor values and input capacitor values. This accommodates the use of PC board-embedded planar magnetics achieving superior reliability, current sharing, thermal management, compact size, and low system cost. The MAX5038A/MAX5041A also feature a clock input (CLKIN) for synchronization to an external clock, and a clock output (CLKOUT) with programmable phase delay (relative to CLKIN) for paralleling multiple phases. The MAX5038A/MAX5041A also limit the reverse current in case the bus voltage becomes higher than the regulated output voltage. The MAX5038A offers a variety of factory-trimmed preset output voltages (see Selector Guide) and the MAX5041A offers an adjustable output voltage between +1.0V to +3.3V.
The MAX5038A and MAX5041A are dual‑phase, average‑current‑mode PWM controllers designed for high‑output‑current applications such as servers, workstations, and high‑density DC‑DC regulators. They operate from either a +4.75 V to +5.5 V or +8 V to +28 V input range and support up to 60 A output current.
The document provides electrical characteristics, absolute maximum ratings, pin configuration, package information, and PCB layout recommendations to help designers implement the controllers in compact, high‑efficiency power supplies.
| Input Voltage Range | +4.75 V to +5.5 V or +8 V to +28 V |
|---|---|
| Maximum Output Current | Up to 60 A |
| Switching Frequency per Phase | 250 kHz or 500 kHz (up to 1 MHz for two phases) |
| Package Type | 28‑Pin SSOP |
| Operating Temperature Range | -40 °C to +85 °C |
The controllers accept either a +4.75 V to +5.5 V range or a +8 V to +28 V range.
Both devices can deliver up to 60 A of output current.
The device is offered in a 28‑pin SSOP package.
The controllers can be set to 250 kHz or 500 kHz per phase, with up to 1 MHz possible when two phases are used.