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MAX1817

Maxim
Part Number MAX1817
Manufacturer Maxim
Description Compact / High-Efficiency / Dual-Output Step-Up DC-DC Converter
Published May 6, 2005
Detailed Description 19-1794 Rev 0; 10/00 Compact, High-Efficiency, Dual-Output Step-Up DC-DC Converter General Description The MAX1817 is a...
Datasheet PDF File MAX1817 PDF File

MAX1817
MAX1817

Overview
19-1794 Rev 0; 10/00 Compact, High-Efficiency, Dual-Output Step-Up DC-DC Converter General Description The MAX1817 is a compact, high-efficiency, dual-output step-up converter for portable devices that provides both the main logic supply and the LCD bias.
The device operates from an input voltage of +1.
5V to +5.
5V, allowing the use of 2- or 3-cell alkaline batteries, or 1-cell lithium-ion (Li+) batteries.
The MAX1817’s main regulator supplies 125mA at either a preset 3.
3V or an adjustable 2.
5V to 5.
5V output voltage with up to 88% efficiency.
A 0.
1µA shutdown state also minimizes battery drain.
The MAX1817’s secondary step-up converter provides the LCD bias voltage and is adjustable up to +28V.
Other features include a fast switching frequency to reduce the size of external components and a low quiescent current to maximize battery life.
Both outputs can be independently shut down for improved flexibility.
The MAX1817 is supplied in a compact 10-pin µMAX package.
The MAX1817 evaluation kit (MAX1817EVKIT) is available to speed up design.
Features o Dual Step-Up Converter in a Tiny 10-Pin µMAX Package o Main Output Up to 125mA Load Current Fixed 3.
3V or Adjustable 2.
5V to 5.
5V Up to 88% Efficiency Internal Switch o LCD Output Up to 28V for LCD Bias Internal Switch o Input Voltage Range +1.
5V to +5.
5V o Minimal External Components Required o 0.
1µA Logic-Controlled Shutdown o Low 15µA Quiescent Supply Current MAX1817 ________________________Applications Organizers/Translators PDAs MP3 Players GPS Receivers PART MAX1817EUB Ordering Information TEMP.
RANGE -40°C to +85°C PIN-PACKAGE 10 µMAX Typical Operating Circuit +1.
5V TO +5.
5V Pin Configuration TOP VIEW FB 1 LCD LX LXLCD FBLCD ON ONLCD FBLCD AGND 2 3 4 5 10 OUT 9 LX GND LXLCD N.
C.
MAX1817 8 7 6 LCD ON/OFF ONLCD MAX1817 MAIN ON/OFF ON AGND OUT FB GND MAIN µMAX ________________________________________________________________ Maxim Integrated Products 1 For price, delivery, and to place orders, please co...


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