LTC1872

PRODUCTION

Constant Frequency Current Mode Step-Up DC/DC Controller in SOT-23

Part Models: 2
1ku List Price: Starting From $2.30

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Overview

High Efficiency: Up to 90%
High Output Currents Easily Achieved
Wide V_IN Range: 2.5V to 9.8V
V_OUT Limited Only by External Components
Constant Frequency 550kHz Operation
Burst Mode^™ Operation at Light Load

Current Mode Operation for Excellent Line and Load Transient Response
Low Quiescent Current: 270µA
Shutdown Mode Draws Only 8µA Supply Current
±2.5% Reference Accuracy
Tiny 6-Lead SOT-23 Package

The LTC1872 is a constant frequency current mode step-up DC/DC controller providing excellent AC and DC load and line regulation. The device incorporates an accurate undervoltage lockout feature that shuts down the LTC1872 when the input voltage falls below 2.0V.

The LTC1872 boasts a ±2.5% output voltage accuracy and consumes only 270µA of quiescent current. For applications where efficiency is a prime consideration, the LTC1872 is configured for Burst Mode operation, which enhances efficiency at low output current.

In shutdown, the device draws a mere 8µA. The high 550kHz constant operating frequency allows the use of a small external inductor.

The LTC1872 is available in a small footprint 6-lead SOT-23.


	Burst Mode
LTC1872	Yes
LTC1872B	No

Applications

Lithium-Ion-Powered Applications
Cellular Telephones
Wireless Modems
Portable Computers
Scanners

Part Models: 2
1ku List Price: Starting From $2.30

Documentation

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
LTC1872ES6#TRMPBF	6-Lead TSOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1872ES6#TRPBF	6-Lead TSOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

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

Software Resources

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC1872
LTC1872B

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.