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Status

Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 192kB) Download   E-Mail

Description

The MAX1730 regulated step-down charge pump generates up to 50mA at fixed output voltages of 1.8V or 1.9V from an input voltage in the 2.7V to 5.5V range. Specifically designed to provide high-efficiency logic supplies in applications that demand a compact design, the MAX1730 employs fractional conversion techniques to provide efficiency exceeding that of a linear regulator. The MAX1730 operates at up to 2MHz, permitting the use of small 0.22µF flying capacitors while maintaining low 75µA quiescent supply current. Proprietary soft-start circuitry prevents excessive current from being drawn from the supply during startup, making the MAX1730 compatible with higher impedance sources such as alkaline and lithium-ion cells. The MAX1730 is available in a space-saving 10-pin µMAX® package that is only 1.09mm high and occupies one-half the area of an 8-pin SO.

Key Features		Applications/Uses
> 85% Peak Efficiency 50mA Guaranteed Output Current Dual-Mode 1.8V or 1.9V Output ±3% Output Voltage Accuracy Up to 2MHz Operating Frequency Small 0.22µF Capacitors No Inductor Required 2.7V to 5.5V Input Voltage Range Output Disconnects from Input in Shutdown Mode Small 10-Pin µMAX Package (1.09mm max height)		Handheld Instruments (PDAs, Palmtops) Low-Voltage Logic Supplies PC Cards PDAs Wireless Handsets

Diagram

Typical Operating Circuit

Application Notes

Application Note 1876: Doubler/Inverter Charge Pumps Divide by Two - MAX1730

Reliability Reports

Show FIT data for: MAX1730 Request Reliability Report for: MAX1730

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

MAX1730	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1730EUB			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1730EUB-T			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1730EUB+			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1730EUB+T			Active	µMAX;10 pin;15.4 mm² Outline Drawing: 21-0061 (PDF) Land Pattern: 90-0330 (PDF) Use pkgcode/variation: U10+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

New Product Press Release 2000-02-28

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