Power Management LED Driver ICs Step-Up (Boost) LED Drivers

LT2940 - Power and Current Monitor

LT3593 - 1MHz White LED Driver with Output Disconnect and One Pin Current Programming

Features

  • Drives Up to Ten White LEDs from a 3V Supply
  • One Pin Shutdown and Current Programming
  • LEDs Disconnected in Shutdown
  • 32:1 Linear Brightness Control Range
  • VIN Range: 2.7V to 5.5V
  • ±5% Output Current Accuracy at Full Scale
  • Low Shutdown Current: 3μA
  • 1MHz Switching Frequency
  • Requires Only 1μF Output Capacitor
  • Low Profile 6-Lead DFN (2mm × 2mm × 0.75mm) and 6-Lead SOT-23 Packages

Typical Application

LT3593 Typical Application
LT3593 Typical Application

Description

The LT3593 is a step-up DC/DC converter designed to drive up to ten white LEDs in series from a Li-Ion cell. Series connection of the LEDs provides identical LED currents and eliminates the need for ballast resistors. The device features a unique high side LED current sense that enables the part to function as a “one wire current source” where the low side of the LED string can be returned to ground anywhere.

Additional features include output disconnect in shutdown, open LED protection and 1-pin shutdown/LED current control. The CTRL pin is toggled to adjust the LED current via an internal counter and a 5-bit DAC.

The LT3593 switches at 1MHz, allowing the use of tiny external components. Constant frequency switching results in low input noise and a small output capacitor. The LT3593 is available in the 6-lead DFN (2mm × 2mm) as well as the 6-lead SOT-23 packages.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing		 RoHS
LT3593EDC#PBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LT3593EDC#TRMPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LT3593EDC#TRPBF 2x2 DFN-6 DC6 E 05-08-1703 Yes
LT3593ES6#TRMPBF SOT-23 S6 E 05-08-1636 Yes
LT3593ES6#TRPBF SOT-23 S6 E 05-08-1636 Yes


LT3593 Package Drawing
LT3593 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)		 Price
(1k)*		 RoHS
LT3593EDC#PBF 2x2 DFN-6 E $2.00 Yes
LT3593EDC#TRMPBF 2x2 DFN-6 E $2.00 $1.45 Yes
LT3593EDC#TRPBF 2x2 DFN-6 E $2.00 $1.40 Yes
LT3593ES6#TRMPBF SOT-23 E $2.00 $1.45 Yes
LT3593ES6#TRPBF SOT-23 E $2.00 $1.40 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1224A LT3593DCB | 1MHz White LED Driver with Output Disconnect $75.00
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Click here to view our complete list of demo boards

Applications

  • Cell Phones
  • Digital Cameras
  • PDAs, Handheld Computers
  • MP3 Players
  • GPS Receivers

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Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

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