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Status

Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 956kB) Download   E-Mail

Description

The MAX8728 generates all the supply rails for thin-film transistor (TFT) liquid-crystal display (LCD) panels in TVs and monitors. It includes step-down and step-up regulators, positive and negative charge pumps, and a dual-mode, logic-controlled, high-voltage switch control block. The MAX8728 can operate from input voltages from 7V to 13.2V and is optimized 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 allowing 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 compensation. The positive and negative charge-pump regulators provide TFT gate driver supply voltages. Both output voltages can be adjusted with external resistive voltage-dividers. The MAX8728 is available in a small (5mm x 5mm), low-profile (0.8mm), 32-pin thin QFN package and operates over the -40°C to +85°C temperature range.

An evaluation kit is available:  MAX8728EVKIT  

Key Features		Applications/Uses
Optimized for 10.8V to 13.2V Input Supply 7V to 13.2V Input Supply Range Selectable Frequency (500kHz/1MHz/1.5MHz) Current-Mode Step-Down Regulator 14V Internal n-Channel MOSFET 1.5% Accurate Output Current-Mode Step-Up Regulator 15V Internal n-Channel MOSFET 1% Accurate Output True Shutdown (Output Goes to Zero) 180° Out-of-Phase Switching Adjustable Positive/Negative Charge Pumps Soft-Start and Timer Delay Fault Latch for All Outputs Logic-Controlled, High-Voltage Switches Power-Up and Power-Down Sequences Thermal-Overload Protection		LCD Monitors LCD TVs

Diagram

Simplified Operating Circuit

Evaluation Kits

MAX8728EVKIT

Reliability Reports

Reliability Report: MAX8728.pdf Show FIT data for: MAX8728

Software/Models

none

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-4 of 4

MAX8728	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8728ETJ			Active	TQFN;32 pin;26 mm² Outline Drawing: 21-0140 (PDF) Land Pattern: 90-0012 (PDF) Use pkgcode/variation: T3255-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX8728ETJ+T			Active	TQFN;32 pin;26 mm² Outline Drawing: 21-0140 (PDF) Land Pattern: 90-0012 (PDF) Use pkgcode/variation: T3255+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8728ETJ+			Active	TQFN;32 pin;26 mm² Outline Drawing: 21-0140 (PDF) Land Pattern: 90-0012 (PDF) Use pkgcode/variation: T3255+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8728ETJ-T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet

More Information

New Product Press Release 2006-02-23

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