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

Description

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

MAX5038A

Step-Down

4.75

1.2
1.5
1.8
2.5
3.3

Yes

250
500

Yes

MAX5041A

3.3

See All Switch-Mode DC-DC Power Supplies (418)

Ordering Information

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-12 of 12

MAX5038A

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX5038AEAI12

SSOP;28 pin;82 mm²
Dwg: 21-0056C (PDF)
Use pkgcode/variation: A28-1*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX5038AEAI33-T

-40°C to +85°C

See data sheet

MAX5038AEAI33

SSOP;28 pin;82 mm²
Dwg: 21-0056C (PDF)
Use pkgcode/variation: A28-1*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX5038AEAI25-T

-40°C to +85°C

See data sheet

MAX5038AEAI25

SSOP;28 pin;82 mm²
Dwg: 21-0056C (PDF)
Use pkgcode/variation: A28-1*

-40°C to +85°C

See data sheet
Materials Analysis

MAX5038AEAI18-T

-40°C to +85°C

See data sheet

MAX5038AEAI18

SSOP;28 pin;82 mm²
Dwg: 21-0056C (PDF)
Use pkgcode/variation: A28-1*

-40°C to +85°C

See data sheet
Materials Analysis

MAX5038AEAI15-T

-40°C to +85°C

See data sheet

MAX5038AEAI15

SSOP;28 pin;82 mm²
Dwg: 21-0056C (PDF)
Use pkgcode/variation: A28-1*

-40°C to +85°C

See data sheet
Materials Analysis

MAX5038AEAI12-T

-40°C to +85°C

See data sheet

MAX5041A

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX5041AEAI

SSOP;28 pin;82 mm²
Dwg: 21-0056C (PDF)
Use pkgcode/variation: A28-1*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX5041AEAI-T

-40°C to +85°C

See data sheet

Related Products

MAX5038, MAX5041 Dual-Phase, Parallelable, Average Current-Mode Controllers