MAX1878

PRODUCTION

Dual-Output Step-Down and LCD Step-Up Power Supply for PDAs

Data Sheet (Rev. 2) Product Selection Table

Part Models: 2
1ku List Price: Starting From $2.00

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Overview

Evaluation Kit Available to Speed Designs
Two Output Voltages
- Main Output: 1.25V to V_IN
- LCD Output: Up to 28V
2.0V to 5.5V Input Range
Low 19µA Quiescent Supply Current
1µA Shutdown Supply Current
High Switching Frequency for Small External Components
Small 0.75mm High 4mm x 4mm 12-Pin TQFN Package

The MAX1878 dual power supply contains a step-down and step-up DC-DC converter in a small 12-pin TQFN package for use in PDAs. The step-down DC-DC converter delivers over 500mA to an output as low as 1.25V for logic power. The step-up DC-DC converter delivers over 15mA and an output as high as 28V for a liquid crystal display (LCD). With an input voltage from 2.0V to 5.5V the MAX1878 is intended for use in systems powered by a 2-cell alkaline or 1-cell lithium-ion (Li+) battery.

Fast switching frequency allows the use of small inductors and capacitors, and the low 19µA typical quiescent current allows high efficiency when the system is in standby mode. Each output can be independently enabled.

The MAX1878 is available in a small 0.75mm high 4mm x 4mm 12-pin TQFN package and requires no external FETs. The MAX1878 evaluation kit is available to speed designs.

Applications

GPS Receivers
MP3 Players
Organizers/Translators
Personal Digital Assistants (PDAs)

Part Models: 2
1ku List Price: Starting From $2.00

Documentation

Data Sheet 1

MAX1878: Dual-Output Step-Down and LCD Step-Up Power Supply for PDAs Data Sheet (Rev.2) 06/29/2011

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
MAX1878ETC+	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX1878ETC+T	Thin Quad Flatpack, No Leads	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 20, 2016 - 1612 ASSEMBLY
		pcn_1612
MAX1878ETC+	PRODUCTION
MAX1878ETC+T	PRODUCTION

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 6
MAX1677	PRODUCTION	Compact, High-Efficiency, Dual-Output Step-Up and LCD Bias DC-DC Converter
MAX1605	PRODUCTION	30V Internal Switch LCD Bias Supply
MAX1606	PRODUCTION	28V Internal Switch LCD Bias Supply with True Shutdown™
MAX1692	PRODUCTION	Low-Noise, 5.5V Input, PWM Step-Down Regulator

MAX1733	PRODUCTION	Low-Voltage, Step-Down DC-DC Converters in SOT23
MAX1734	PRODUCTION	Low-Voltage, Step-Down DC-DC Converters in SOT23

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