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Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 732kB) Download   E-Mail

Description

The MAX1775 is a dual, step-down DC-DC converter that generates both the main (+3.3V at over 2A) and core (+1.8V at up to 1.5A) supplies for a complete power solution for PDAs, subnotebooks, and other hand-held devices. The main output is adjustable from +1.25V to +5.5V. The core output is adjustable from 1V to 5V. Both switching converters operate at up to 1.25MHz for small external components and use synchronous rectifiers to achieve efficiencies up to 95%. Operation with up to 100% duty cycle provides the lowest possible dropout voltage to extend useful battery life. The MAX1775 accepts inputs from +2.7V up to +28V, allowing use with many popular battery configurations as well as AC-DC wall adapters. Digital soft-start reduces battery current surges at power-up. Both the main and core converters have separate shutdown inputs. The MAX1775 comes in a small 16-pin QSOP package. The MAX1775 evaluation kit is available to help reduce design time.

An evaluation kit is available:  MAX1775EVKIT  

Key Features		Applications/Uses
Dual, High-Efficiency, Synchronous Rectified Step-Down Converter Main Power Adjustable from +1.25V to +5.5V Over 2A Load Current Up to 95% Efficiency Core Power Adjustable from 1V to 5V Internal Switches Up to 1.5A Load Current Up to 92% Efficiency 100% (max) Duty Cycle Up to 1.25MHz Switching Frequency Input Voltage Range from +2.7V to +28V 170µA Quiescent Current 5µA Shutdown Current Digital Soft-Start Independent Shutdown Inputs		Handheld Computers Internet Access Tablets PDAs POS Terminals Subnotebooks

Diagram

Typical Operating Circuit

Evaluation Kits

MAX1775EVKIT

Reliability Reports

Show FIT data for: MAX1775 Request Reliability Report for: MAX1775

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

MAX1775	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1775EEE			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16-5*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1775EEE-T			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16-5*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1775EEE+			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1775EEE+T			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

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