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Status

Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 252kB) Download   E-Mail

Description

The MAX1947 is a compact, high-efficiency, step-up DC-DC converter that regulates output voltages from 1.8V to 3.3V to power µP/DSP cores, memory, and I/O rails in 1- and 2-cell alkaline/NiMH/NiCd battery-powered systems. It features an internal 800mA switch and synchronous rectifier to achieve up to 94% efficiency and to eliminate the need for an external Schottky diode. High-frequency switching (up to 2MHz) results in low ripple and small external components, while automatic pulse skipping at light loads reduces supply current to just 70µA for extended battery life. Maxim's proprietary True Shutdown™ reduces supply current to just 2µA and fully discharges the output to ground. The converter is offered in fixed-output voltages of 1.8V, 2.5V, 3.0V, and 3.3V, requiring no feedback or compensation network. A 75ms RESET-bar output flag provides for power-on reset (POR) and undervoltage detection. The MAX1947 is available in a space-saving 8-pin TDFN package.

An evaluation kit is available:  MAX1947EVKIT  

Key Features		Applications/Uses
Low Input (0.7V) and Output (1.8V) Voltage Capability Internal Synchronous Rectifier High 94% Efficiency Fixed Output Voltages: 1.8V, 2.5V, 3V, and 3.3V Up to 2MHz Switching Allows Small External Components and Low Output Ripple Automatic Pulse Skipping at Light Loads for Extended Battery Life Low 70µA (typ) Operating Supply Current (Measured at OUT) Low 2µA Logic-Controlled Shutdown True Shutdown Fully Discharges Output to Ground Uses Only Small Ceramic Capacitors 75ms active-low RESET Output Flag		Cordless Phones Digital Still Cameras MP3 Players, Pagers, and CD Players Other Battery-Powered Systems PDAs and Organizers Portable Medical Equipment Wireless Mice/Keyboards

Diagram

Typical Operating Circuit

Evaluation Kits

MAX1947EVKIT

Reliability Reports

Show FIT data for: MAX1947 Request Reliability Report for: MAX1947

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: 1-12 of 12

MAX1947	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1947ETA18+			Active	TDFN-EP;8 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0059 (PDF) Use pkgcode/variation: T833+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1947ETA25+			Active	TDFN-EP;8 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0059 (PDF) Use pkgcode/variation: T833+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1947ETA30+			Active	TDFN-EP;8 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0059 (PDF) Use pkgcode/variation: T833+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1947ETA33+			Active	TDFN-EP;8 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0059 (PDF) Use pkgcode/variation: T833+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1947ETA18-T			Active	TDFN-EP;8 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0059 (PDF) Use pkgcode/variation: T833-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1947ETA25-T			Active	TDFN-EP;8 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0059 (PDF) Use pkgcode/variation: T833-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1947ETA30-T			Active	TDFN-EP;8 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0059 (PDF) Use pkgcode/variation: T833-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1947ETA33-T			Active	TDFN-EP;8 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0059 (PDF) Use pkgcode/variation: T833-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1947ETA18+T			Active	TDFN-EP;8 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0059 (PDF) Use pkgcode/variation: T833+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1947ETA25+T			Active	TDFN-EP;8 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0059 (PDF) Use pkgcode/variation: T833+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1947ETA30+T			Active	TDFN-EP;8 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0059 (PDF) Use pkgcode/variation: T833+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1947ETA33+T			Active	TDFN-EP;8 pin;9.6 mm² Outline Drawing: 21-0137 (PDF) Land Pattern: 90-0059 (PDF) Use pkgcode/variation: T833+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

Topmark Coding: MAX1947 New Product Press Release 2004-07-12  Product Ad: MAX1947

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