LT1932

PRODUCTION

Constant-Current DC/DC LED Driver in ThinSOT

Part Models: 2
1ku List Price: Starting From $2.15

Viewing:

Overview

Up to 80% Efficiency
Inherently Matched LED Current
Drives Five White LEDs from 2V
Drives Six White LEDs from 2.7V
Drives Eight White LEDs from 3V
Adjustable Control of LED Current
Disconnects LEDs In Shutdown
1.2MHz Fixed Frequency Switching
Uses Tiny Ceramic Capacitors
Uses Tiny 1mm-Tall Inductors
Regulates Current Even When V_IN > V_OUT
Operates with V_IN as Low as 1V
Low Profile (1mm) ThinSOT^™ Package

The LT1932 is a fixed frequency step-up DC/DC converter designed to operate as a constant-current source. Because it directly regulates output current, the LT1932 is ideal for driving light emitting diodes (LEDs) whose light intensity is proportional to the current passing through them, not the voltage across their terminals.

With an input voltage range of 1V to 10V, the device works from a variety of input sources. The LT1932 accurately regulates LED current even when the input voltage is higher than the LED voltage, greatly simplifying battery-powered designs. A single external resistor sets LED current between 5mA and 40mA, which can then be easily adjusted using either a DC voltage or a pulse width modulated (PWM) signal. When the LT1932 is placed in shutdown, the LEDs are disconnected from the output, ensuring a quiescent current of under 1µA for the entire circuit. The device’s 1.2MHz switching frequency permits the use of tiny, low profile chip inductors and capacitors to minimize footprint and cost in space-conscious portable applications.

Applications

Cellular Telephones
Handheld Computers
Digital Cameras
Portable MP3 Players
Pagers

Part Models: 2
1ku List Price: Starting From $2.15

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
LT1932ES6#TRMPBF	6-Lead TSOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1932ES6#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

Can't find the software or driver you need?

Request a Driver/Software

Hardware Ecosystem

Parts	Product Life Cycle	Description
LT3465	PRODUCTION	1.2MHz White LED Step-Up Converters with Built-In Schottky in ThinSOT

Tools & Simulations

LTspice 1

LT1932 Demo Circuit - Constant-Current Step-Up LED Driver (3V to 4 3.6V LED @ 15mA)

Models for the following parts are available in LTspice:

LT1932

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.

Latest Discussions

2 Years Ago

LT1932

Overview

Documentation

Data Sheet 1

Reliability Data 2

Design Note 1

Technical Articles 1

LT Journal 1