MAX1947

PRODUCTION

Low Input/Output Voltage Step-Up DC-DC Converter with Active-Low RESET

Smallest 1.8V Output Step-Up Converter with True Shutdown for 1-/2-Cell Alkaline Handhelds

Data Sheet (Rev. 2) Product Selection Table

Part Models: 7
1ku List Price: Starting From $2.05

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Part Details

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

Part Models: 7
1ku List Price: Starting From $2.05

Documentation

Data Sheet 1

MAX1947: Low Input/Output Voltage Step-Up DC-DC Converter with Active-Low RESET Data Sheet (Rev.2) 12/06/2006

Technical Articles 4

ISM Transmitter Has Constant Transmitter Power for Varying Supply Voltage 01/09/2012

Important Design Considerations for Digital Thermometers 05/10/2010

Introduction to Hearing Aids and Important Design Considerations 05/10/2010

Important Considerations for Insulin Pump and Portable Medical Designs 05/10/2010

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
MAX1947ETA18+	Thin Dual Flatpack No Leads, Exposed Pad	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX1947ETA25+	Thin Dual Flatpack No Leads, Exposed Pad	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX1947ETA25+T	Thin Dual Flatpack No Leads, Exposed Pad	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX1947ETA30+	Thin Dual Flatpack No Leads, Exposed Pad	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX1947ETA30+T	Thin Dual Flatpack No Leads, Exposed Pad	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX1947ETA33+	Thin Dual Flatpack No Leads, Exposed Pad	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX1947ETA33+T	Thin Dual Flatpack No Leads, Exposed Pad	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 20, 2016 - 1612 ASSEMBLY
		pcn_1612
MAX1947ETA18+	LAST TIME BUY
MAX1947ETA25+	LAST TIME BUY
MAX1947ETA25+T	LAST TIME BUY
MAX1947ETA30+	PRODUCTION
MAX1947ETA30+T	PRODUCTION
MAX1947ETA33+	PRODUCTION
MAX1947ETA33+T	PRODUCTION
Apr 27, 2024 - 2400 ASSEMBLY
		pcn_2400
MAX1947ETA30+	PRODUCTION
MAX1947ETA30+T	PRODUCTION
MAX1947ETA33+	PRODUCTION
MAX1947ETA33+T	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Hardware Ecosystem

Parts	Product Life Cycle	Description
Internal Power Switch Boost Regulators 3
MAX1674	PRODUCTION	High-Efficiency, Low-Supply-Current, Compact, Step-Up DC-DC Converters
MAX1797	PRODUCTION	Low-Supply Current, Step-Up DC-DC Converters with True Shutdown
MAX1722	PRODUCTION	1.5µA I_Q, Step-Up DC-DC Converters in TSOT and µDFN

Evaluation Kits

Evaluation Kit for the MAX1947

Buy Now View Details

Features and Benefits

0.7V to 3.6V Input Voltage Range

1.8V Output Voltage

Up to 270mA Output Current

No Current-Sense Resistor Needed

90% Efficiency

Track Mode when V_IN > V_OUT

Internal MOSFET Switch and Synchronous Rectifier

True Shutdown™

1.2MHz (max) Switching Frequency

Surface-Mount Components

Fully Assembled and Tested

Product Details

The MAX1947 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board demonstrating the low-voltage, skip-mode boost converter. The EV kit provides a 1.8V output voltage capable of sourcing 270mA (typ) load current from a 0.7V to 3.6V input source. The MAX1947 features skip mode to optimize efficiency and battery life. It also contains internal MOSFETs for lower cost and size. The 1.2MHz (max) switching frequency allows the use of small external components. The MAX1947 EV kit is fully assembled and tested. The MAX1947 EV kit can be used to evaluate the MAX1947ETA25, MAX1947ETA30, and MAX1947ETA33 with no PC board modification.

Applications

Cordless Phones
Digital Still Cameras
MP3 Players, Pagers, and CD Players
Other Battery-Powered Systems
PDAs and Organizers
Portable Medical Equipment
Wireless Mice/Keyboards

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