General Description

The MAX17024 pulse-width modulation (PWM) con-

troller provides high efficiency, excellent transient

response, and high DC-output accuracy needed for

stepping down high-voltage batteries to generate low-

voltage core or chipset/RAM bias supplies in notebook

computers. The output voltage can be controlled using

the dynamic REFIN, which supports input voltages

between 0 to 2V. The REFIN adjustability combined

with a resistive voltage-divider on the feedback input

allows the MAX17024 to be configured for any output

Maxim’s proprietary Quick-PWM™ quick-response, con-

stant-on-time PWM control scheme handles wide

input/output voltage ratios (low-duty-cycle applications)

with ease and provides 100ns “instant-on” response to

load transients while maintaining a relatively constant

switching frequency. Strong drivers allow the MAX17024

to efficiently drive large synchronous-rectifier MOSFETs.

The controller senses the current across the sense

resistor series with the synchronous rectifier to achieve

highly accurate valley current-limit protection.

The MAX17024 includes a voltage-controlled soft-start

and soft-shutdown to limit the input surge current, pro-

vide a monotonic power-up (even into a precharged

output), and provide a predictable power-up time. The

controller also includes output undervoltage and ther-

mal-fault protection.

The MAX17024 is available in a tiny 14-pin, 3mm x

3mm TDFN package. For space-constrained applica-

tions, refer to the MAX17016 single step-down with 26V

internal MOSFETs capable of supporting 10A continu-

ous load. The MAX17016 is available in a small 40-pin,

6mm x 6mm TQFN package.

Applications

Notebook Computers

I/O and Chipset Supplies

GPU Core Supply

DDR Memory—VDDQ or VTT

Point-of-Load Applications

Step-Down Power Supply

Features

o Quick-PWM with Fast Transient Response

o Supports Any Output Capacitor

No Compensation Required with

Polymers/Tantalum

Stable with Ceramic Output Capacitors Using

External Compensation

o Precision 2V ±10mV Reference

o Dynamically Adjustable Output Voltage

Feedback Input Regulates to 0 to 2V REFIN

Voltage

o 26V Maximum Input Voltage Rating

o Resistively Programmable Switching Frequency

o Undervoltage/Thermal Protection

o Voltage Soft-Start and Soft-Shutdown

o Monotonic Power-Up with Precharged Output

o Power-Good Window Comparator

Single Quick-PWM Step-Down

Controller with Dynamic REFIN

________________________________________________________________

Maxim Integrated Products

1

MAX17024

GND

TDFN

(3mm x 3mm)

TOP VIEW

24

5

13

11

10

1

14

3

12

6

9

7

8

Pin Configuration

19-1040; Rev 0; 10/07

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.

EVALUATION

KIT

AVAILABLE

Quick-PWM is a trademark of Maxim Integrated Products, Inc.

Ordering Information

Note: This device is specified over the -40°C to +85°C operating

temperature range.

+

Denotes a lead-free package.

*

EP = Exposed paddle.

PART

PIN-PACKAGE

PKG

CODE

TOP

MARK

MAX17024ETD

14 TDFN-EP* 3mm x 3mm

T1433-1

ADO