LTC1872B

PRODUCTION

Constant Frequency Current Mode Step-Up DC/DC Controller in ThinSOT

Part Models: 2
1ku List Price: Starting From $2.20

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Overview

Burst Mode^™ Operation Disabled for Lower Output Ripple at Light Loads
High Efficiency: Over 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
Current Mode Operation for Excellent Line and Load Transient Response
Shutdown Mode Draws Only 8µA Supply Current
Low Profile (1mm) ThinSOT^™ Package

The LTC1872B 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 LTC1872B when the input voltage falls below 2.0V.

The LTC1872B provides a ±2.5% output voltage accuracy and consumes only 270µA of quiescent current. In shutdown, the device draws a mere 8µA.

High constant operating frequency of 550kHz allows the use of a small external inductor. The constant frequency operation is maintained down to very light loads, resulting in less low frequency noise generation over a wide load current range.

The LTC1872B is available in a 6-lead low profile (1mm) ThinSOT package. For a Burst Mode operation enabled version of the LTC1872B, please refer to the LTC1872 data sheet.


	Burst Mode
LTC1872	Yes
LTC1872B	No

Applications

Optical Communications
Lithium-Ion-Powered Applications
Cellular Telephones
Wireless Devices
Portable Computers
Scanners

Part Models: 2
1ku List Price: Starting From $2.20

Documentation

Data Sheet 1

LTC1872B: Constant Frequency Current Mode Step-Up DC/DC Controller in ThinSOT Data Sheet 09/17/2015

Reliability Data 1

R402 Reliability Data 03/27/2018

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
LTC1872BES6#TRMPBF	6-Lead TSOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1872BES6#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.

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