The MAX5038/MAX5041 dual-phase, PWM controllers provide high-output-current capability in a compact package with a minimum number of external components. The MAX5038/MAX5041 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 MAX5038/MAX5041 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 MAX5038 offers a variety of factory-trimmed preset output voltages (see Selector Guide) and the MAX5041 offers an adjustable output voltage from +1.0V to +3.3V.
The MAX5038/MAX5041 operate over the extended industrial temperature range (-40°C to +85°C) and are available in a 28-pin SSOP package. Refer to the MAX5037 data sheet for a VRM 9.0-compatible, VID-controlled output voltage controller in a 44-pin MQFP or QFN package.
Key Features
Applications/Uses
+4.75V to +5.5V or +8V to +28V Input Voltage Range
Up to 60A Output Current
Internal Voltage Regulator for a +12V or +24V Power Bus
True Differential Remote Output Sensing
Two Out-Of-Phase Controllers Reduce Input Capacitance Requirement and Distribute Power Dissipation
Average Current-Mode Control
Superior Current Sharing Between Individual Phases and Paralleled Modules
Accurate Current Limit Eliminates MOSFET and Inductor Derating
Integrated 4A Gate Drivers
Selectable Fixed Frequency 250kHz or 500kHz Per Phase (Up to 1MHz for 2 Phases)
Fixed (MAX5038) or Adjustable (MAX5041) Output Voltages
0.5% Accurate Reference (MAX5041B)
External Frequency Synchronization from 125kHz to 600kHz
Internal PLL with Clock Output for Paralleling Multiple DC-DC Converters
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