MAX8574

PRODUCTION

High-Efficiency LCD Boost with True Shutdown

First Fully Protected LCD and OLED Supplies in SOT23 Package

Data Sheet (Rev. 3) Product Selection Table

Part Models: 2
1ku List Price: Starting From $1.77

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Overview

15V or Adjustable Output Voltage Up to 28V
Safety Features Protect Against Output Faults
20mA at 20V from a Single Li+ Battery
True Shutdown
87% Efficiency
Up to 800kHz Switching Frequency
Small, 6-Pin SOT23 and µDFN (MAX8570 Only) Packages

The MAX8570 family of LCD step-up converters uses an internal n-channel switch and an internal p-channel output isolation switch. These converters operate from a 2.7V to 5.5V supply voltage and deliver up to 28V at the output.

A unique control scheme provides the highest efficiency over a wide range of load conditions. The internal MOSFET switch reduces external component count and a high switching frequency (up to 800kHz) allows for tiny surface-mount components. Three current-limit options are available. The MAX8570 and MAX8572 use a 110mA current limit to reduce ripple and component size in low-current applications. For high-power requirements, the MAX8574 and MAX8575 use a 500mA current limit and supply up to 20mA at 20V. The MAX8571 and MAX8573 use a 250mA current limit for a compromise between ripple and power. Built-in safety features protect the internal switch and down-stream components from fault conditions.

Additional features include a low quiescent current and a True Shutdown™ mode to save power. The MAX8570/MAX8571/MAX8574 allow the user to set the output voltage between 3V and 28V, and the MAX8572/MAX8573/MAX8575 have a preset 15V output. These step-up converters are ideal for small LCD panels with low current requirements, but can also be used in other applications. The MAX8571 evaluation kit is available to help reduce design time.

Applications

Cell Phones/Cordless Phones
Handy Terminals
LCD Bias Generators
Organizers
Palmtop Computers
PDAs and Other Handheld Devices
Polymer LEDs (OLED)

Part Models: 2
1ku List Price: Starting From $1.77

Documentation

Data Sheet 1

MAX8570-MAX8575: High-Efficiency LCD Boost with True Shutdown Data Sheet (Rev.3) 03/24/2010

Design Note 1

Miniature Circuit Converts Negative Inputs to Positive Outputs 08/09/2010

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX8574EUT+	Small-Outline Transistor Package	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX8574EUT+T	Small-Outline Transistor Package	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Mar 9, 2023 - 2276A WAFER FAB
		pcn_2276a
MAX8574EUT+	PRODUCTION
MAX8574EUT+T	PRODUCTION
Feb 5, 2015 - 1370_CANCELLATION ASSEMBLY
		pcn_1370_cancellation
MAX8574EUT+	PRODUCTION	pcn_1370_cancellation

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Switching Regulators & Controllers 2
MAX1605	PRODUCTION	30V Internal Switch LCD Bias Supply
MAX1606	PRODUCTION	28V Internal Switch LCD Bias Supply with True Shutdown™

Evaluation Kits

Evaluation Kit for MAX8570, MAX8571, MAX8572, MAX8573, MAX8574, MAX8575

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Features and Benefits

18V Output Voltage, Adjustable from V_CC Up to 28V

Built-In Safety Features Protect Against Output Faults

True Shutdown™

87% Efficiency

Up to 800kHz Switching Frequency

0.01µA Shutdown Current

Fully Assembled and Tested

Product Details

The MAX8571 evaluation kit (EV kit) contains a fully assembled and tested circuit for evaluating the MAX8571 step-up converter. This circuit operates with 2.7V to 5.5V input supply and provides a regulated 18V output at up to 10mA. The output voltage is adjustable from V_CC to 28V by changing resistors on the EV kit. The MAX8571 EV kit contains a second unpopulated circuit to accomodate a larger inductor and diode for the higher-current-limited MAX8574 and MAX8575. Either circuit can be used to evaluate any of the parts in the MAX8570 family.

Applications