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Dual-Phase, Parallelable, Average Current-Mode Controllers

Product Details

Key Features

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.75
VIN (V) (max) 28
VOUT1 (V) (min) 1
VOUT1 (V) (max) 3.3
IOUT1 (A) (max) 60
Switch Type External
Output Adjust. Method Resistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 500
Package/Pins SSOP/28
Budgetary
Price (See Notes)
7.12
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Simplified Block Diagram

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.75
VIN (V) (max) 28
VOUT1 (V) (min) 1
VOUT1 (V) (max) 3.3
IOUT1 (A) (max) 60
Switch Type External
Output Adjust. Method Resistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 500
Package/Pins SSOP/28
Budgetary
Price (See Notes)
7.12

Key Features

  • +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
  • Thermal Protection
  • 28-Pin SSOP Package

Applications/Uses

  • High-End Desktop Computers
  • Large-Memory Arrays
  • Networking Systems
  • Point-of-Load High-Current/High-Density Telecom DC-DC Regulators
  • RAID Systems
  • Servers and Workstations

Description

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.

Simplified Block Diagram

MAX5038, MAX5041: Pin Configuration MAX5038, MAX5041: Pin Configuration Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .