MAX17075 Maxim Integrated Products, MAX17075 Datasheet

MAX17075

Manufacturer Part Number

MAX17075

Description

Boost-Regulator

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX17075.pdf (22 pages)

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The MAX17075 includes a high-voltage boost regulator,

one high-current operational amplifier, two regulated

charge pumps, and one MLG block for gate-driver

supply modulation.

The step-up DC-DC converter is a 1.2MHz current-

mode boost regulator with a built-in power MOSFET. It

provides fast load-transient response to pulsed loads

while producing efficiencies over 85%. The built-in

160mΩ (typ) power MOSFET allows output voltages as

high as 18V boosted from inputs ranging from 2.5V to

5.5V. A built-in 7-bit digital soft-start function controls

startup inrush currents.

The gate-on and gate-off charge pumps provide regu-

lated TFT gate-on and gate-off supplies. Both output

voltages can be adjusted with external resistive

voltage-dividers.

The operational amplifier, typically used to drive the

LCD backplane (VCOM), features high-output short-cir-

cuit current (±500mA), fast slew-rate (45V/µs), wide

bandwidth (20MHz), and rail-to-rail outputs.

The MAX17075 is available in a 24-pin thin QFN pack-

age with 0.5mm lead spacing. The package is a square

(4mm x 4mm) with a maximum thickness of 0.8mm for

ultra-thin LCD design. It operates over the -40°C to

+85°C temperature range.

Pin Configuration appears at end of data sheet.

19-4353; Rev 0; 11/08

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.

* EP = Exposed paddle.

+ Denotes a lead-free/RoHS-compliant package.

MAX17075ETG+

Boost Regulator with Integrated Charge Pumps,

Notebook Computer Displays

LCD Monitor Panels

LCD TVs

PART

________________________________________________________________ Maxim Integrated Products

Switch Control, and High-Current Op Amp

-40°C to +85°C

TEMP RANGE

Ordering Information

General Description

Applications

PIN-PACKAGE

24 TQFN-EP*

o 2.5V to 5.5V Input Operating Range

o Current Mode Step-Up Regulator

o High-Current 18V VCOM Buffer

o Regulated Charge Pump for TFT Gate-On Supply

o Regulated Charge Pump for TFT Gate-Off Supply

o Logic-Controlled High-Voltage Switches with

o Soft-Start and Timed Delay Fault Latch for All

o Overload and Thermal Protection

2.5V TO 5.5V

GOFF

Adjustable Delay

Outputs

AVDD

Fast-Transient Response

Built-In 20V, 3A, 0.16Ω n-Channel Power MOSFET

Cycle-by-Cycle Current Limit

87% Efficiency (5V Input to 13V Output)

1.2MHz Switching Frequency

±1% Output Voltage Regulation Accuracy

±500mA Output Short-Circuit Current

45V/µs Slew Rate

20MHz -3dB Bandwidth

Rail-to-Rail Output

TO V

COM

Simplified Operating Circuit

1μF

10Ω

BGND

VCC

OUT

NEG

POS

REF

AGND

FBN

DRVN

BGND

SUP CTL EP

FROM

TCON

MAX17075

COMP

RSTIN

DEL

PGND

DRVP

COM

DRN

SRC

RST

FBP

Features

GON

SYSTEM

FROM

3.3V

MAIN

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