MAX15050EWE+T Maxim Integrated Products, MAX15050EWE+T Datasheet

Switching Converters, Regulators & Controllers WLP 16 PIN 2.7MM egulator with Integr

MAX15050EWE+T

Manufacturer Part Number

MAX15050EWE+T

Description

Switching Converters, Regulators & Controllers WLP 16 PIN 2.7MM egulator with Integr

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX15050EWET.pdf (15 pages)

Specifications of MAX15050EWE+T

Output Current

4 A

Input Voltage

2.9 V to 5.5 V

Switching Frequency

1 MHz

Operating Temperature Range

- 40 C to + 85 C

Mounting Style

SMD/SMT

Duty Cycle (max)

96 %

Package / Case

WLP-16

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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The MAX15050/MAX15051 high-efficiency switching reg-

ulators deliver up to 4A load current at output voltages

from 0.6V to (0.9 x V

to 5.5V, making them ideal for on-board point-of-load

and postregulation applications. Total output-voltage

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

The MAX15050/MAX15051 feature 1MHz fixed-frequen-

cy PWM operation. The MAX15050 features pulse-skip

mode to improve light-load efficiency. The MAX15050

soft-starts in a monotonic mode and then operates in

the forced PWM mode or pulse-skip mode depending

on the output load current condition. The MAX15051

soft-starts in the monotonic mode and operates in the

forced PWM mode. 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 MAX15050/MAX15051 incorporate a high-bandwidth

(> 26MHz) voltage-error amplifier. The voltage-mode control

architecture and the voltage-error amplifier permit a type III

compensation scheme to achieve maximum loop band-

width, up to 200kHz. High loop bandwidth provides fast

transient response, resulting in less required output capaci-

tance and allowing for all-ceramic capacitor designs.

The MAX15050/MAX15051 feature an output overload

hiccup protection and peak current limit on both high-

side and low-side MOSFETs. These features provide for

ultra-safe operation in the cases of short-circuit condi-

tions, severe overloads, or in converters with bulk elec-

trolytic capacitors.

The MAX15050/MAX15051 feature an adjustable output volt-

age. The output voltage is adjustable by using two external

resistors at the feedback or by applying an external reference

voltage to the REFIN/SS input. The MAX15050/MAX15051

offer programmable soft-start time using one capacitor to

reduce input inrush current. A built-in thermal shutdown pro-

tection assures safe operation under all conditions. The

MAX15050/MAX15051 are available in a 2mm x 2mm,

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

19-4915; Rev 2; 3/10

with Integrated Switches in 2mm x 2mm Package

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.

Server Power Supplies

Point-of-Load

ASIC/CPU/DSP Core

and I/O Voltages

DDR Power Supplies

Base-Station Power

Supplies

High-Efficiency, 4A, 1MHz, Step-Down Regulators

________________________________________________________________ Maxim Integrated Products

). The devices operate from 2.9V

General Description

Telecom and

Networking Power

Supplies

RAID Control Power

Supplies

Portable Applications

Applications

o Internal 18mΩ R

o Pulse-Skip Mode for High-Efficiency Light Load

o Continuous 4A Output Current

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

o Operates from 2.9V to 5.5V 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

o Safe Startup Into Prebias Output

o Enable Input/Power-Good Output

o Fully Protected Against Overcurrent and

o Overload Hiccup Protection

o Sink/Source Current for DDR Applications

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

Pin Configuration appears at end of data sheet.

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

M A X1 5 0 5 0 E WE +

M A X1 5 0 5 1 E WE +

2.9V TO 5.5V

(MAX15050)

and Temperature

Electrolytic Output Capacitors

Overtemperature

WLP Package

INPUT

PART

REFIN/SS

Typical Operating Circuit

MAX15050

MAX15051

DS(ON)

TEMP RANGE

- 40°C to + 85°C

GND

Ordering Information

PWRGD

COMP

GND

BST

MOSFETs

PIN-

PACKAGE

16 WLP

Features

)

OUTPUT

MODE

SKIP

Yes

Related parts for MAX15050EWE+T

MAX15050EWE+T Summary of contents

Page 1

... I/O Voltages Supplies DDR Power Supplies Portable Applications Base-Station Power Supplies ________________________________________________________________ Maxim Integrated Products 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. o Internal 18mΩ Pulse-Skip Mode for High-Efficiency Light Load (MAX15050) o Continuous 4A Output Current o ± ...

Page 2

High-Efficiency, 4A, 1MHz, Step-Down Regulators with Integrated Switches in 2mm x 2mm Package ABSOLUTE MAXIMUM RATINGS IN, PWRGD to GND..................................................-0. GND ..................-0.3V to the lower of + COMP, FB, REFIN/SS to GND ....................-0.3V ...

Page 3

High-Efficiency, 4A, 1MHz, Step-Down Regulators with Integrated Switches in 2mm x 2mm Package ELECTRICAL CHARACTERISTICS (continued 5V 2.2µ -40°C to +85°C, typical values are VDD A PARAMETER COMP ...

Page 4

Page 5

High-Efficiency, 4A, 1MHz, Step-Down Regulators with Integrated Switches in 2mm x 2mm Package (V = 5V, output voltage = 1.8V LOAD EFFICIENCY vs. LOAD CURRENT V = 3.3V (MAX15051) IN 100 2.5V OUT V ...

Page 6

High-Efficiency, 4A, 1MHz, Step-Down Regulators with Integrated Switches in 2mm x 2mm Package (V = 5V, output voltage = 1.8V LOAD SOFT-START WAVEFORM MAX15050 toc10 400µs/div RMS INPUT CURRENT DURING SHORT CIRCUIT vs. INPUT VOLTAGE 0. ...

Page 7

High-Efficiency, 4A, 1MHz, Step-Down Regulators with Integrated Switches in 2mm x 2mm Package (V = 5V, output voltage = 1.8V LOAD CASE TEMPERATURE vs. AMBIENT TEMPERATURE 100 LOAD -20 -40 ...

Page 8

High-Efficiency, 4A, 1MHz, Step-Down Regulators with Integrated Switches in 2mm x 2mm Package SHUTDOWN EN CONTROL BIAS GENERATOR VOLTAGE REFERENCE SOFT-START REFIN/SS FB COMP COMP CLAMPS 8 _______________________________________________________________________________________ V DD UVLO CIRCUITRY 3.3V (LDO) CURRENT-LIMIT COMPARATOR SHDN CONTROL LOGIC THERMAL ...

Page 9

High-Efficiency, 4A, 1MHz, Step-Down Regulators with Integrated Switches in 2mm x 2mm Package INPUT 2. 22µF 0.1µF C5 2.2µF ON OFF C8 0.033µF Figure 1. All-Ceramic Capacitor Design with V Detailed Description The MAX15050/MAX15051 high-efficiency, voltage- ...

Page 10

High-Efficiency, 4A, 1MHz, Step-Down Regulators with Integrated Switches in 2mm x 2mm Package turns off when the ramp voltage exceeds the V signal or the current-limit threshold is exceeded. The low-side switch then turns on for the remainder of the ...

Page 11

High-Efficiency, 4A, 1MHz, Step-Down Regulators with Integrated Switches in 2mm x 2mm Package Setting the Output Voltage The MAX15050/MAX15051 output voltage is adjustable from 0. connecting FB to the center IN tap of a resistor-divider ...

Page 12

High-Efficiency, 4A, 1MHz, Step-Down Regulators with Integrated Switches in 2mm x 2mm Package The peak-to-peak inductor current (I − OUT = I x − × Use these equations for initial output-capacitor selec- ...

Page 13

High-Efficiency, 4A, 1MHz, Step-Down Regulators with Integrated Switches in 2mm x 2mm Package π π ...

Page 14

High-Efficiency, 4A, 1MHz, Step-Down Regulators with Integrated Switches in 2mm x 2mm Package Soft-Starting Into a Prebiased Output The MAX15050/MAX15051 can soft-start into a prebi- ased output without discharging the output capacitor. In safe prebiased startup, both low-side and high-side ...

Page 15

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 © 2010 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...

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