General Description
The MAX5065/MAX5067 dual-phase, PWM controllers provide high-output-current capability in a compact package with a minimum number of external components. The MAX5065/MAX5067 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.

Features
♦ +4.75V to +5.5V or +8V to +28V Input Voltage Range
♦ Adjustable VOUT
   +0.6V to +3.3V (MAX5065)
   +0.8V to +3.3V (MAX5067)
♦ Up to 60A Output Current
♦ Internal Voltage Regulator for a +12V or +24V Power Bus
♦ Programmable Adaptive Output Voltage Positioning
♦ True Differential Remote Output Sensing
♦ 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
♦ Limits Reverse-Current Sinking in Paralleled Modules
♦ Integrated 4A Gate Drivers
♦ Selectable Fixed Frequency 250kHz or 500kHz Per
   Phase (Up to 1MHz for Two Phases)
♦ External Frequency Synchronization from 125kHz to 600kHz
♦ Internal PLL with Clock Output for Paralleling
   Multiple DC-DC Converters
♦ Thermal Protection
♦ 28-Pin SSOP Package (MAX5065)
♦ 44-Pin Thin QFN Package (MAX5067)

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