MAX8758 Maxim Integrated Products, MAX8758 Datasheet

MAX8758

Manufacturer Part Number

MAX8758

Description

Step-Up Regulator

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX8758.pdf (20 pages)

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Bonase Electronics (HK) Co., Limited

Part Number:

MAX8758ETG+

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Bonase Electronics (HK) Co., Limited

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The MAX8758 includes a high-performance step-up regu-

lator, a high-speed operational amplifier, and a logic-

controlled, high-voltage switch-control block with pro-

grammable delay. The device is optimized for thin-film

transistor (TFT) liquid-crystal display (LCD) applications.

The step-up DC-DC regulator provides the regulated sup-

ply voltage for the panel source driver ICs. The converter

is a high-frequency (640kHz/1.2MHz), current-mode regu-

lator with an integrated 14V n-channel power MOSFET.

The high-switching frequency allows the use of ultra-small

inductors and ceramic capacitors. The current-mode con-

trol architecture provides fast transient response to pulsed

loads. The regulator achieves efficiencies over 85% by

bootstrapping the supply rail of the internal gate driver

from the step-up regulator output. The step-up regulator

features undervoltage lockout (UVLO), soft-start, and

internal current limit. The high-current operational amplifier

is designed to drive the LCD backplane (VCOM). The

amplifier features high output current (±150mA), fast slew

rate (7.5V/µs), wide bandwidth (12MHz), and rail-to-rail

inputs and outputs.

The MAX8758 is available in a 24-pin, 4mm x 4mm, thin

QFN package with a maximum thickness of 0.8mm for

ultra-thin LCD panels. The device operates over the

-40°C to +85°C temperature range.

19-3699; Rev 1; 9/05

*EP = Exposed pad.

+Denotes lead-free package.

Pin Configuration appears at end of data sheet.

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

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

MAX8758ETG

MAX8758ETG+

PART

Notebook Displays

LCD Monitors

-40°C to +85°C

________________________________________________________________ Maxim Integrated Products

TEMP RANGE

Ordering Information

General Description

Step-Up Regulator with Switch Control

and Operational Amplifier for TFT LCD

PIN-PACKAGE

24 Thin QFN-EP*

4mm x 4mm

24 Thin QFN-EP*

4mm x 4mm

Applications

♦ 1.8V to 5.5V Input Voltage Range

♦ Input Undervoltage Lockout

♦ 0.5mA Quiescent Current

♦ 640kHz/1.2MHz Current-Mode Step-Up Regulator

♦ High-Speed Operational Amplifier

♦ Dual Mode™, Logic-Controlled, High-Voltage

♦ Thermal-Overload Protection

♦ 24-Pin, 4mm x 4mm, Thin QFN Package

Switch with Programmable Delay

GOFF

Fast Transient Response

High-Accuracy Output Voltage (1.5%)

Built-In 14V, 2.5A, 115mΩ MOSFET

High Efficiency

Programmable Soft-Start

Current Limit with Lossless Sensing

Timer-Delay Fault Latch

±150mA Output Current

7.5V/µs Slew Rate

12MHz, -3dB Bandwidth

Rail-to-Rail Inputs/Outputs

FROM TCON

Simplified Operating Circuit

GON

FREQ

SHDN

COMP

LDO

MODE

CTL

DRN

GON

MAX8758

PGND

SUPB

POSB

NEGB

OUTB

GND

OUT

THR

DLP

SRC

TO VCOM

BACKPLANE

Features

MAIN

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