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General Description

The MAX15040 high-efficiency switching regulator

delivers up to 4A load current at output voltages from

0.6V to (0.9 x V

). The device operates from 2.4V to

3.6V, making it ideal for on-board point-of-load and

postregulation applications. Total output-voltage accu-

racy is within ±1% over load, line, and temperature.

The MAX15040 features 1MHz fixed-frequency PWM

mode operation. The high operating frequency allows

for small-size external components.

The low-resistance on-chip nMOS switches ensure high

efficiency at heavy loads while minimizing critical parasitic

inductances, making the layout a much simpler task with

respect to discrete solutions. Following a simple layout

and footprint ensures first-pass success in new designs.

The MAX15040 incorporates a high-bandwidth

(> 15MHz) voltage-error amplifier. The voltage-mode

control architecture and the voltage-error amplifier per-

mit a Type III compensation scheme to achieve maxi-

mum loop bandwidth, up to 200kHz. High loop

bandwidth provides fast transient response, resulting in

less required output capacitance and allowing for all-

ceramic capacitor designs.

The MAX15040 features an output overload hiccup pro-

tection and peak current limit on both high-side (sourc-

ing current) and low-side (sinking and sourcing current)

MOSFETs, for ultra-safe operations in case of high out-

put prebias, short-circuit conditions, severe overloads,

or in converters with bulk electrolytic capacitors.

The MAX15040 features an adjustable output voltage.

The output voltage is adjustable by using two external

resistors at the feedback or by applying an external ref-

erence voltage to the REFIN/SS input. The MAX15040

offers programmable soft-start time using one capacitor

to reduce input inrush current. A built-in thermal shut-

down protection assures safe operation under all condi-

tions. The MAX15040 is available in a 2mm x 2mm,

16-bump (4 x 4 array), 0.5mm pitch WLP package.

Applications

Server Power Supplies

Point-of-Load

ASIC/CPU/DSP Core and I/O Voltages

DDR Power Supplies

Base-Station Power Supplies

Telecom and Networking Power Supplies

RAID Control Power Supplies

Features

o Internal 15mΩ R

DS(ON)

MOSFETs

o Continuous 4A Output Current

o ±1% Output-Voltage Accuracy Over Load, Line,

and Temperature

o Operates from 2.4V to 3.6V Supply

o Adjustable Output from 0.6V to (0.9 x V

)

o Adjustable Soft-Start Reduces Inrush Supply

Current

o Factory-Trimmed 1MHz Switching Frequency

o Compatible with Ceramic, Polymer, and

Electrolytic Output Capacitors

o Safe Startup into Prebias Output

o Enable Input/Power-Good Output

o Fully Protected Against Overcurrent and

Overtemperature

o Overload Hiccup Protection

o Sink/Source Current in DDR Applications

o 2mm x 2mm, 16-Bump (4 x 4 Array), 0.5mm Pitch

WLP Package

MAX15040

High-Efficiency, 4A, Step-Down Regulator with

Integrated Switches in 2mm x 2mm Package

________________________________________________________________

Maxim Integrated Products

Ordering Information

19-4426; Rev 2; 7/10

EVALUATION KIT

AVAILABLE

PART TEMP RANGE PIN-PACKAGE

M AX 15040E WE + - 40°C to + 85°C 16 WLP

Denotes a lead(Pb)-free/RoHS-compliant package.

Pin Configuration appears at end of data sheet.

OUTPUT

INPUT

2.4V TO 3.6V

BST

GND

COMP

PWRGD

REFIN/SS

GND

MAX15040

Typical Operating Circuit

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

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MAX15040 1

Resumo do Conteúdo

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General DescriptionThe MAX15040 high-efficiency switching regulatordelivers up to 4A load current at output voltages from0.6V to (0.9 x VIN). The devi

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MAX15040High-Efficiency, 4A, Step-Down Regulator withIntegrated Switches in 2mm x 2mm Package10 ______________________________________________________

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MAX15040High-Efficiency, 4A, Step-Down Regulator withIntegrated Switches in 2mm x 2mm Package_________________________________________________________

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MAX15040High-Efficiency, 4A, Step-Down Regulator withIntegrated Switches in 2mm x 2mm PackageInput-Capacitor SelectionThe input capacitor reduces the

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MAX15040The zero-cross frequency of the closed-loop, fC, shouldbe between 10% and 20% of the switching frequency, fS (1MHz). A higher zero-cross frequ

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MAX15040High-Efficiency, 4A, Step-Down Regulator withIntegrated Switches in 2mm x 2mm Package14 ______________________________________________________

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MAX15040High-Efficiency, 4A, Step-Down Regulator withIntegrated Switches in 2mm x 2mm PackageMaxim cannot assume responsibility for use of any circuit

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MAX15040High-Efficiency, 4A, Step-Down Regulator withIntegrated Switches in 2mm x 2mm Package2 _______________________________________________________

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MAX15040High-Efficiency, 4A, Step-Down Regulator withIntegrated Switches in 2mm x 2mm Package_________________________________________________________

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EFFICIENCY vs. OUTPUT CURRENTMAX15040 toc01OUTPUT CURRENT (A)EFFICIENCY (%)15060708090100400.1 10VDD = VIN = 3.3VVOUT = 1.2VVOUT = 1.8VVOUT = 1.5VVOUT

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MAX15040High-Efficiency, 4A, Step-Down Regulator withIntegrated Switches in 2mm x 2mm Package_________________________________________________________

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MAX15040High-Efficiency, 4A, Step-Down Regulator withIntegrated Switches in 2mm x 2mm Package_________________________________________________________

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MAX15040High-Efficiency, 4A, Step-Down Regulator withIntegrated Switches in 2mm x 2mm Package8 _______________________________________________________

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MAX15040C90.1µFOPTIONALC122µFOUTPUT1.8V/4AINPUT2.4V TO 3.6VC30.1µFBSTLXINVDDFBCOMPC1233pFC11820pFR45.1kΩR520kΩPWRGDL10.47µHC80.033µFC222µFC40.01µFC104

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Rainbow-electronics MAX15040 Manual do Utilizador

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