MAX5038

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

Application

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


Pinout




Specifications

IN to SGND.............................................................-0.3V to +30V
BST_ to SGND................-0.3V to +35V
DH_ to LX_ ................................-0.3V to [(VBST_ - VLX_) +  0.3V]
DL_ to PGND..............................................-0.3V to (VCC + 0.3V)
BST_ to LX_ ..............................................................-0.3V to +6V
VCC to SGND............................................................-0.3V to +6V
VCC to PGND............................................................-0.3V to +6V
SGND to PGND .....................................................-0.3V to +0.3V
All Other Pins to SGND...............................-0.3V to (VCC + 0.3V) Continuous Power Dissipation (TA = +70°C)
28-Pin SSOP (derate 9.5mW/°C above +70°C) ............762mW
Operating Temperature Range ...........................-40°C to +85°C
Maximum Junction Temperature .....................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C


Description

The MAX5038/MAX5041 dual-phase, PWM controllers provide high-output-current capability in a compact package with a minimum number of external compo- nents. The MAX5038/MAX5041 utilize a dual-phase, average current mode control that enables optimal use of low RDS(ON) MOSFETs, eliminating the need for exter- nal heatsinks even when delivering high output currents.
Differential sensing enables accurate control of the out- put 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 reliabili- ty, 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.