MAX5066 Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications

Description

The MAX5066 is a two-phase, configurable single- or dual-output buck controller with an input voltage range of 4.75V to 5.5V or from 5V to 28V. Each phase of the MAX5066 is designed for 180° operation. A mode pin allows for a dual-output supply or connecting two phases together for a single-output, high-current supply. Each output channel of the MAX5066 drives n-channel MOSFETs and is capable of providing more than 25A of load current. The MAX5066 uses average current-mode control with a switching frequency up to 1MHz per phase where each phase is 180° out of phase with respect to the other. Out-of-phase operation results in significantly reduced input capacitor ripple current and output voltage ripple in dual-phase, single-output voltage applications. Each buck regulator output has its own high-performance current and voltage-error amplifier that can be compensated for optimum output filter L-C values and transient response.

The MAX5066 offers two enable inputs with accurate turn-on thresholds to allow for output voltage sequencing of the two outputs. The device's switching frequency can be programmed from 100kHz to 1MHz with an external resistor. The MAX5066 can be synchronized to an external clock. Each output voltage is adjustable from 0.61V to 5.5V. Additional features include thermal shutdown, "hiccup mode" short-circuit protection. Use the MAX5066 with adaptive voltage positioning for applications that require a fast transient response, or accurate output voltage regulation.

The MAX5066 is available in a thermally enhanced 28-pin TSSOP package capable of dissipating 1.9W. The device is rated for operation over the -40°C to +85°C extended, or -40°C to +125°C automotive temperature range.

Key Features

Applications/Uses

4.75V to 5.5V or 5V to 28V Input
Dual-Output Synchronous Buck Controller
Configurable for Two Separate Outputs or One Single Output
Each Output is Capable of Up to 25A Output Current
Average Current-Mode Control Provides Accurate Current Limit
180° Interleaved Operation Reduces Size of Input Filter Capacitors
Limits Reverse Current Sinking When Operated in Parallel Mode
Each Output is Adjustable from 0.61V to 5.5V
Independently Programmable Adaptive Voltage Positioning
Independent Shutdown for Each Output
100kHz to 1MHz per Phase Programmable Switching Frequency
Oscillator Frequency Synchronization from 200kHz to 2MHz
Hiccup Mode Overcurrent Protection
Overtemperature Shutdown
Thermally Enhanced 28-Pin TSSOP Package Capable of Dissipating 1.9W
Operates Over -40°C to +85°C or -40°C to +125°C Temperature Range

	Graphic Cards
	High-End Desktop Computers
	Networking Systems
	Point-of-Load High-Current/High-Density
	RAID Systems
	Telecom DC-DC Regulators

Key Specifications: Switch-Mode DC-DC Power Supplies

Part Number

Topology

V_IN (min) (V)

V_IN (max) (V)

Number of DC-DC Outputs

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

Internal Power Switch(es)

Synchronous Rectifier

Industry Qualified

Package

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

Price^**

MAX5066

Step-Down

4.75

0.61

5.5

Yes

Automotive - General

TSSOP/28

$2.18 @ 1k

See All Switch-Mode DC-DC Power Supplies (421)

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.

Ordering Information

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
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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: 1-8 of 8

MAX5066

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX5066AUI

TSSOP;28 pin;64 mm²
Dwg: 21-0108F (PDF)
Use pkgcode/variation: U28E-4*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX5066AUI+

TSSOP;28 pin;64 mm²
Dwg: 21-0108F (PDF)
Use pkgcode/variation: U28E+4*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX5066AUI+T

TSSOP;28 pin;64 mm²
Dwg: 21-0108F (PDF)
Use pkgcode/variation: U28E+4*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX5066AUI-T

-40°C to +125°C

See data sheet

MAX5066EUI

TSSOP;28 pin;64 mm²
Dwg: 21-0108F (PDF)
Use pkgcode/variation: U28E-4*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX5066EUI-T

TSSOP;28 pin;64 mm²
Dwg: 21-0108F (PDF)
Use pkgcode/variation: U28E-4*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX5066EUI+

TSSOP;28 pin;64 mm²
Dwg: 21-0108F (PDF)
Use pkgcode/variation: U28E+4*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX5066EUI+T

TSSOP;28 pin;64 mm²
Dwg: 21-0108F (PDF)
Use pkgcode/variation: U28E+4*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

More Information

	New Product Press Release 2005-06-02
	Product Ad: Download

Related Products

MAX5065, MAX5067 Dual-Phase, +0.6V to +3.3V Output Parallelable, Average-Current-Mode Controllers
MAX5060, MAX5061 0.6V to 5.5V Output, Parallelable, Average-Current-Mode DC-DC Controllers