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MAX5037EMHMAXIMN/a1avai4.75 to 5.5 V or 8 to 28 V, VRM 9.0, dual-phase, parallelable, average current-mode controller


MAX5037EMH ,4.75 to 5.5 V or 8 to 28 V, VRM 9.0, dual-phase, parallelable, average current-mode controllerApplications♦ Internal PLL with Clock Output for ParallelingServers and WorkstationsMultiple DC-DC ..
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MAX5037EMH
4.75 to 5.5 V or 8 to 28 V, VRM 9.0, dual-phase, parallelable, average current-mode controller
General Description
The MAX5037 dual-phase, PWM controller provides
high-output-current capability in a compact package
with a minimum number of external components. The
MAX5037 utilizes 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 regula-
tor enables operation with either +5V or +12V input volt-
age without the need for additional voltage sources. The
high switching frequency, up to 500kHz per phase, and
dual-phase operation allow the use of low output induc-
tor values and input capacitor values. This accommo-
dates the use of PC board-embedded planar magnetics
achieving superior reliability, current sharing, thermal
management, compact size, and low system cost.
The MAX5037 also features a clock input (CLKIN) for syn-
chronization to an external clock, and a clock output
(CLKOUT) with programmable phase delay (relative to
CLKIN) for paralleling multiple phases.
The MAX5037 operates over the extended industrial
temperature range (-40°C to +85°C) and is available in
44-pin MQFP or thin QFN packages. Refer to the
MAX5038/MAX5041 data sheet for either a fixed output
voltage controller or an adjustable output voltage con-
troller in a 28-pin SSOP package.
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
Features
+4.75V to +5.5V or +8V to +28V Input Voltage
Range
Up to 60A Output CurrentInternal Voltage Regulator for a +12V or +24V
Power Bus
Internal 5-Bit DAC VID Control (VRM 9.0
Compliant, 0.8% Accuracy)
Programmable Adaptive Output Voltage
Positioning
True Differential Remote Output SensingOut-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 High-Output-Current Gate DriversSelectable Fixed Frequency 250kHz or 500kHz Per
Phase (Up to 1MHz for 2 Phases)
External Frequency Synchronization from 125kHz
to 600kHz
Internal PLL with Clock Output for Paralleling
Multiple DC-DC Converters
Power-Good OutputPhase Failure Detector (Patent Pending)Overvoltage and Thermal Protection44-Pin MQFP or QFN Packages
MAX5037
VRM 9.0, Dual-Phase, Parallelable,
Average Current-Mode Controller

19-2552; Rev 3; 4/04
Ordering Information
Pin Configuration appears at end of data sheet.
MAX5037
VRM 9.0, Dual-Phase, Parallelable,
Average Current-Mode Controller
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS

(VCC= VDD= +5V, circuit of Figure 1, TA= -40°C to +85°C, unless otherwise noted. Typical specifications are at TA= +25°C.)
(Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
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 (VDD+ 0.3V)
BST_ to LX_..............................................................-0.3V to +6V
VCCto SGND............................................................-0.3V to +6V
VDDto 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)
44-Pin MQFP (derate 12.7mW/°C above +70°C)........1013mW
44-Pin QFN (derate 27.0mW/°C above +70°C).......2162.2mW
Package Thermal Resistance, θJC(QFN only)..................2°C/W
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
MAX5037
VRM 9.0, Dual-Phase, Parallelable,
Average Current-Mode Controller
ELECTRICAL CHARACTERISTICS (continued)

(VCC= VDD= +5V, circuit of Figure 1, TA= -40°C to +85°C, unless otherwise noted. Typical specifications are at TA= +25°C.)
(Note 1)
MAX5037
VRM 9.0, Dual-Phase, Parallelable,
Average Current-Mode Controller
ELECTRICAL CHARACTERISTICS (continued)

(VCC= VDD= +5V, circuit of Figure 1, TA= -40°C to +85°C, unless otherwise noted. Typical specifications are at TA= +25°C.)
(Note 1)
Note 1:
Specifications from -40°C to 0°C are guaranteed by characterization but not production tested.
Note 2:
CNTR voltage accuracy is defined as the center of the adaptive voltage-positioning window (see Adaptive Voltage
Positioningsection).
Note 3:
Guaranteed by design. Not production tested.
Note 4:
See Peak-Current Comparator section.
MAX5037
VRM 9.0, Dual-Phase, Parallelable,
Average Current-Mode Controller
EFFICIENCY vs. OUTPUT CURRENT AND
INTERNAL OSCILLATOR FREQUENCY

MAX5037 toc01
IOUT (A)
(%)44403632282420161284
EFFICIENCY vs. OUTPUT CURRENT
AND INPUT VOLTAGE
MAX5037 toc02
IOUT (A)
(%)44403632282420161284
EFFICIENCY vs. OUTPUT CURRENT
MAX5037 toc03
IOUT (A)
(%)44403632282420161284
EFFICIENCY vs. OUTPUT CURRENT
AND OUTPUT VOLTAGE
MAX5037 toc04
IOUT (A)
(%)44403632282420161284
EFFICIENCY vs. OUTPUT CURRENT
AND OUTPUT VOLTAGE
MAX5037 toc05
IOUT (A)
(%)44403632282420161284
SUPPLY CURRENT
vs. FREQUENCY AND INPUT VOLTAGE
MAX5037 toc06
FREQUENCY (kHz)
ICC
(mA)
SUPPLY CURRENT
vs. TEMPERATURE AND FREQUENCY
MAX5037 toc07
TEMPERATURE (°C)
(mA)3510-15
SUPPLY CURRENT
vs. TEMPERATURE AND FREQUENCY
MAX5037 toc08
TEMPERATURE (°C)
ICC
(mA)3510-15
SUPPLY CURRENT
vs. LOAD CAPACITANCE PER DRIVER
MAX5037 toc09
CDRIVER (nF)
ICC
(mA)117953
Typical Operating Characteristics
(Circuit of Figure 1, TA= +25°C, unless otherwise noted.)
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