General Description

The MAX17113 multiple-output power-supply controller

generates all the supply rails for thin-film transistor

(TFT) liquid-crystal display (LCD) panels in TVs and

monitors operating from a regulated 12V input. It

includes a step-down and a step-up regulator, a posi-

tive and a negative charge pump, a Dual Mode™ logic-

controlled high-voltage switch control block, and an

adjustable-timing power-good output. The MAX17113

can operate from 8V to 16.5V input voltages and is opti-

mized for LCD TV panel and LCD monitor applications

running directly from 12V supplies.

The step-up and step-down regulators feature internal

power MOSFETs and high-frequency operation allow-

ing the use of small inductors and capacitors, resulting

in a compact solution. Both switching regulators use

fixed-frequency current-mode control architectures,

providing fast load-transient response and easy com-

pensation. A current-limit function for internal switches

and output-fault shutdown protect the step-up and

step-down power supplies against fault conditions. The

MAX17113 provides soft-start functions to limit inrush

current during startup. The MAX17113 provides

adjustable power-up timing.

The positive and negative charge-pump regulators pro-

vide TFT gate-driver supply voltages. Both output volt-

ages can be adjusted with external resistive voltage-

dividers. The switch control block allows the manipula-

tion of the positive TFT gate-driver voltage.

A series p-channel MOSFET is integrated to sequence

through normal startup, and provides True Shutdown™.

The MAX17113 is available in a small (5mm x 5mm),

low-profile (0.8mm), 40-pin thin QFN package and

operates over a -40°C to +85°C temperature range.

Applications

LCD TV Panels

LCD Monitor Panels

Features

o Optimized for 10.8V to 13.2V Input Supply

o 8V to 16.5V Input Supply Range

o Selectable Frequency (450kHz/600kHz)

o Current-Mode Step-Up Regulator

Built-In 24V, 3.3A, 80m

Ω n-Channel MOSFET

High-Accuracy Output Voltage (1%)

True Shutdown

Fast Load-Transient Response

High Efficiency

10ms Internal Soft-Start

o Current-Mode Step-Down Regulator

Built-In 24V, 3A, 100m

Ω n-Channel MOSFET

Fast Load-Transient Response

Adjustable Output Voltage Down to 1.5V

Skip Mode at Light Load (EN2 = AGND)

High Efficiency

3ms Internal Soft-Start

o Adjustable Positive and Negative Charge-Pump

Regulators

o Soft-Start and Timer-Delay Fault Latch for All

Outputs

o Logic-Controlled High-Voltage Integrated

Switches with Adjustable Delay

o Input Undervoltage Lockout and Thermal-

Overload Protection

o 40-Pin, 5mm x 5mm Thin QFN Package

Low-Cost, Multiple-Output

Power Supply for LCD TVs

________________________________________________________________

Maxim Integrated Products

1

Ordering Information

19-4709; Rev 0; 8/09

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.

+

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

*

EP = Exposed pad.

EVALUATION

KIT

AVAILABLE

PART

TEMP RANGE

PIN-PACKAGE

MAX17113ETL+

-40°C to +85°C

40 Thin QFN-EP*

Dual Mode is a trademark of Maxim Integrated Products, Inc.

True Shutdown is a trademark of Maxim Integrated Products, Inc.

Simplified Operating Circuit appears at end of data sheet.

MAX17113

THIN QFN

5mm x 5mm

TOP VIEW

35

36

34

33

12

11

13

14

12

SWI

45

6

7

27

28

29

30

26

24 23

22

SWO

FB1

BST

FB2

DEL1

REF

3

25

37

COMP

FBN

38

39

40

PGOOD

CRST

AGND

AGND

DRVN

CTL

LX1

32

15

LX2

LX1

31

16

17

18

19

20 LX2

89

10

21

PGND

Pin Configuration