MAX8574

High-Efficiency LCD Boost with True Shutdown

First Fully Protected LCD and OLED Supplies in SOT23 Package


Please check latest availability status for a specific part variant.

Description

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.
MAX8570, MAX8571, MAX8572, MAX8573, MAX8574, MAX8575: Typical Application Circuit MAX8570, MAX8571, MAX8572, MAX8573, MAX8574, MAX8575: Typical Application Circuit Enlarge+

Key Features

  • 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

Applications/Uses

  • Cell Phones/Cordless Phones
  • Handy Terminals
  • LCD Bias Generators
  • Organizers
  • Palmtop Computers
  • PDAs and Other Handheld Devices
  • Polymer LEDs (OLED)
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
IOUT1
(A)
Output Adjust. MethodSwitch TypeICC
(mA)
Shutdown Mode Supply Current
(µA)
Shutdown Mode Supply Current
(µA)
DC-DC OutputsPackage/PinsBudgetary
Price
minmaxminmaxtyptypmaxSee Notes
MAX8570 2.75.52.728-0.01ResistorInternal0.0250.0511
SOT23/6
UDFN/6
$1.41 @1k
MAX8571 2.728-0.015Resistor
SOT23/6
$1.41 @1k
MAX8572 1515150.01Preset
SOT23/6
$1.41 @1k
MAX8573 1515150.015Preset
SOT23/6
$1.34 @1k
MAX8574 2.728-0.025Resistor
SOT23/6
$1.41 @1k
MAX8575 1515150.025Preset
SOT23/6
$1.41 @1k
See All Step-Up Switching Regulators (98)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX8571EVKIT: Evaluation Kit for MAX8570, MAX8571, MAX8572, MAX8573, MAX8574, MAX8575

Technical Documents

App Note 4499 Miniature Circuit Converts Negative Inputs to Positive Outputs

Quality and Environmental Data

Request Reliability Report for: MAX8574 
Lead-Free Package Tin (Sn) Whisker Reports
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >

 
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