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Status

Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 272kB) Download   E-Mail

Description

The MAX1744/MAX1745 are step-down DC-DC controllers capable of handling up to 36V inputs. These parts use a proprietary current-limited control scheme for excellent light- and full-load efficiency, while their 330kHz (max) switching frequency permits small external components for space-critical applications. Operation to 100% duty cycle permits the lowest possible dropout voltage. The MAX1744 contains an internal feedback network that provides a pin-selectable output voltage of either 3.3V or 5V. The MAX1745 uses an external feedback network to generate an adjustable output voltage between 1.25V and 18V. The MAX1744/MAX1745 are available in a space-saving 10-pin µMAX® package.

An evaluation kit is available:  MAX1744EVKIT, MAX1745EVKIT  

Key Features		Applications/Uses
High-Voltage Operation (up to 36VIN) Efficiency > 90% Output Power Capability Exceeds 50W 10-Pin µMax Package Low-Dropout Voltage 100% (max) Duty Cycle 90µA Quiescent Current 4µA Shutdown Current Up to 330kHz Switching Frequency Output Voltage 5V or 3.3V (MAX1744) Adjustable 1.25V to 18V (MAX1745) Current-Limited Control Scheme		Automotive Electronics FireWire®/IEEE 1394™ Industrial Control Systems Telecom Systems Wall-Cube-Powered Devices

Diagram

Typical Operating Circuit

Application Notes

Application Note 912: Turn-On Switching Loss of An Asynchronous Buck Converter - MAX1744, MAX1745 Application Note 1845: Choosing the Right DC-DC Converter for Automotive Applications - MAX1745

Evaluation Kits

MAX1744EVKIT, MAX1745EVKIT

Reliability Reports

Reliability Report: MAX1744.pdf MAX1745.pdf Show FIT data for: MAX1744 MAX1745

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: 1-22 of 22

MAX1744	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1744AUB+T			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10CN+1*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1744AUB+			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10CN+1*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1744AUB/V+			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10CN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1744AUB/V+T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1744EUB/V+			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10CN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1744EUB/V+T			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10CN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1744AUB			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10CN-1*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX1744AUB-T			Active	Land Pattern: Not Available	-40°C to +125°C	See data sheet
MAX1744EUB			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10CN-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1744EUB-T			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10CN-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1744EUB+			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10CN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1744EUB+T			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10CN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1745	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1745AUB+			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10CN+1*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1745AUB+T			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10CN+1*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1745EUB/V+T			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10CN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1745EUB/V+			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10CN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1745AUB			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10CN-1*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX1745AUB-T			Active	Land Pattern: Not Available	-40°C to +125°C	See data sheet
MAX1745EUB			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10CN-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1745EUB-T			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10CN-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1745EUB+			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10CN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1745EUB+T			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10CN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

New Product Press Release 2000-09-22  Product Ad: Download MAX1744Power Supply Cookbook

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