MAX5038A, MAX5041A Dual-Phase, Parallelable, Average-Current-Mode Controllers

QuickView

Technical Documents

Ordering Info

More Information

All

Description

FULL DATA SHEET (PDF, 696kB)

Download

E-Mail

The MAX5038A/MAX5041A dual-phase, PWM controllers provide high-output-current capability in a compact package with a minimum number of external components. The MAX5038A/MAX5041A utilize 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 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 MAX5038A/MAX5041A 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 MAX5038A/MAX5041A also limit the reverse current in case the bus voltage becomes higher than the regulated output voltage. The MAX5038A offers a variety of factory-trimmed preset output voltages (see Selector Guide) and the MAX5041A offers an adjustable output voltage between +1.0V to +3.3V.

The MAX5038A/MAX5041A operate over the extended temperature range (-40°C to +85°C) and are available in a 28-pin SSOP package. Refer to the MAX5037A and MAX5065/MAX5067 data sheets for a VRM 9.0/VRM 9.1- compatible, VID-controlled, adjustable output voltage controller in a 44-pin MQFP/thin QFN or 28-pin SSOP 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
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
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)
Fixed (MAX5038A) or Adjustable (MAX5041A) Output Voltages
External Frequency Synchronization from 125kHz to 600kHz
Internal PLL with Clock Output for Paralleling Multiple DC-DC Converters
Thermal Protection
28-Pin SSOP Package

	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

Key Specifications: Switch-Mode DC-DC Power Supplies

Part Number

Topology

V_IN (min) (V)

V_IN (max) (V)

Number of DC-DC Outputs

Preset V_OUT (V)

Digital/VID Programmed Output

Min. Adjustable V_OUT (V)

Max. Adjustable V_OUT (V)

I_OUT (A)

Operating Current, I_CC (max) (mA)

Fixed Freq/PWM Operation

Operating Freq. (kHz)

Internal Power Switch(es)

Synchronous Rectifier

Package

Smallest Available Package (max w/pins) (mm²)

Price^**

MAX5038A

Step-Down

4.75

1.2
1.5
1.8
2.5
3.3

Yes

250
500

Yes

SSOP/28

$2.10 @ 1k

MAX5041A

3.3

See All Switch-Mode DC-DC Power Supplies (413)

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.