MAX15038 Maxim Integrated Products, MAX15038 Datasheet

MAX15038

Manufacturer Part Number

MAX15038

Description

2MHz Step-Down Regulator

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX15038.pdf (19 pages)

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The MAX15038 high-efficiency switching regulator

delivers up to 4A load current at output voltages from

0.6V to 90% of V

making it ideal for on-board point-of-load and postregu-

lation applications. Total output error is less than ±1%

over load, line, and temperature ranges.

The MAX15038 features fixed-frequency PWM mode

operation with a switching frequency range of 500kHz

to 2MHz set by an external resistor. The MAX15038

provides the option of operating in a skip mode to

improve light-load efficiency. High-frequency operation

allows for an all-ceramic capacitor design. The high

operating frequency also allows for small-size external

components.

The low-resistance on-chip nMOS switches ensure high

efficiency at heavy loads while minimizing critical induc-

tances, 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 MAX15038 comes with a high bandwidth (28MHz)

voltage-error amplifier. The voltage-mode control archi-

tecture and the voltage-error amplifier permit a type III

compensation scheme to be utilized to achieve maxi-

mum loop bandwidth, up to 20% of the switching fre-

quency. High loop bandwidth provides fast transient

response, resulting in less required output capacitance

and allowing for all-ceramic-capacitor designs.

The MAX15038 provides two three-state logic inputs to

select one of nine preset output voltages. The preset

output voltages allow customers to achieve ±1% out-

put-voltage accuracy without using expensive 0.1%

resistors. In addition, the output voltage can be set to

any customer value by either using two external resis-

tors at the feedback with a 0.6V internal reference or

applying an external reference voltage to the REFIN

input. The MAX15038 offers programmable soft-start

time using one capacitor to reduce input inrush current.

Pin Configuration appears at end of data sheet.

19-4320; Rev 1; 12/09

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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________________________________________________________________ Maxim Integrated Products

. The IC operates from 2.9V to 5.5V,

General Description

Applications

4A, 2MHz Step-Down Regulator

with Integrated Switches

o Internal 31mΩ R

o Continuous 4A Output Current Over Temperature

o ±1% Output Accuracy Over Load, Line, and

o Operates from 2.9V to 5.5V V

o Adjustable Output from 0.6V to (0.9 x V

o Soft-Start Reduces Inrush Supply Current

o 500kHz to 2MHz Adjustable Switching Frequency

o Compatible with Ceramic, Polymer, and

o Nine Preset and Adjustable Output Voltages

o Monotonic Startup for Safe-Start into Prebiased

o Selectable Forced PWM or Skip Mode for Light

o Overcurrent and Overtemperature Protection

o Output Current Sink/Source Capable with Cycle-

o Open-Drain Power-Good Output

o Lead-Free, 4mm x 4mm, 24-Pin Thin QFN Package

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

* EP = Exposed pad.

2.9V TO 5.5V

MAX15038ETG+

Temperature

Electrolytic Output Capacitors

Outputs

Load Efficiency

by-Cycle Protection

INPUT

DS(ON)

0.6V, 0.7V, 0.8V, 1.0V, 1.2V, 1.5V, 1.8V, 2.0V,

2.5V, and Adjustable

PART

Low-Side MOSFETs

Typical Operating Circuit

CTL2

CTL1

FREQ

REFIN

MODE

DS(ON)

-40°C to +85°C

TEMP RANGE

MAX15038

Ordering Information

GND

High-Side and 24mΩ

PWRGD

COMP

PGND

OUT

BST

Supply

24 Thin QFN-EP*

PIN-PACKAGE

Features

)

OUTPUT

1.8V, 4A

Datasheet pdf - http://www.DataSheet4U.net/

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