MAX5037A VRM 9.0/VRM 9.1, Dual-Phase, Parallelable, Average-Current-Mode Controller

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The MAX5037A dual-phase, PWM controller provides high-output-current capability in a compact package with a minimum number of external components. The MAX5037A utilizes a dual-phase, average-current-mode control that enables optimal use of low R_DS(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 MAX5037A also features 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 MAX5037A also limits the reverse current in case the bus voltage becomes higher than the regulated output voltage.

The MAX5037A operates over the extended temperature range (-40°C to +85°C) and is available in 44-pin MQFP or thin QFN packages. Refer to the MAX5038A/MAX5041A and MAX5065/MAX5067 data sheets for either a fixed output voltage controller or an adjustable output voltage controller in an SSOP or thin 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
Internal 5-Bit DAC VID Control (VRM 9.0/VRM 9.1 Compliant, 0.8% Accuracy)
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 High-Output-Current 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
Power-Good Output
Phase Failure Detector (Patent Pending)
Overvoltage and Thermal Protection
44-Pin MQFP or Thin QFN Packages

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

Key Specifications: Step-Down Switching Regulators

Part Number

V_IN (min) (V)

V_IN (max) (V)

Min. V_OUT (V)

Max. V_OUT (V)

I_OUT (A)

Output Adj. Method

Operating Current, I_CC (max) (mA)

Number of DC-DC Outputs

Operating Freq. (kHz)

Package

Price^**

MAX5037A

4.75

1.1

1.85

Digital/VID

500

MQFP/44
THIN QFN/44

$2.33 @ 1k

See All Step-Down Switching Regulators (223)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.