LT3595 - 16 Channel Buck Mode LED Driver


  • 4.5V to 45V Input Supply Range
  • Up to 50mA LED Current per Channel
  • 100mA, 45V Internal Switches
  • 8% Relative LED Current Match at 20mA
  • 16 Independent LED Channels
  • 5000:1 True Color PWM Dimming Range
  • LEDs Disconnected in Shutdown
  • Internal Schottky Diodes
  • Low Quiescent Current
  • 2MHz Switching Frequency
  • RSET Pin Sets Master LED Current
  • Typical Efficiency: 92%
  • Open LED Detection and Thermal Protection
  • 56-Pin 5mm × 9mm × 0.75mm QFN Package

Typical Application

LT3595 Typical Application
LT3595 Typical Application


The LT3595 is a high performance LED Driver designed to drive sixteen independent channels of up to 10 LEDs at currents up to 50mA. Series connection of the LEDs provides identical LED currents resulting in uniform brightness. Power switches, Schottky diodes, and compensation components are all internal, providing a small converter footprint and lower component cost. The high 2MHz switching frequency permits the use of tiny, low profi le inductors and capacitors. A fixed frequency, current mode architecture results in stable operation over a wide range of supply and output voltage.

A single external resistor sets the LED current for all sixteen channels, and dimming is then controlled for each channel by pulse width modulating the individual PWM pins. Relative current matching among the sixteen drivers is 8% and the PWM dimming range is 5000:1. The part is available in a 5mm x 9mm x 0.75mm 56-pin QFN package.


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
LT3595EUHH#PBF 5x9 QFN-56 UHH E 05-08-1727 Yes
LT3595EUHH#TRPBF 5x9 QFN-56 UHH E 05-08-1727 Yes

LT3595 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
LT3595EUHH#PBF 5x9 QFN-56 E $9.93 $6.95 Yes
LT3595EUHH#TRPBF 5x9 QFN-56 E $7.01 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
DC1199A LT3595EUHH Demo Board| 16-Channel Buck Mode LED Driver, 15V ≤ VIN ≤ 45V, VLED up to 12V @ 30mA(x16) $225.00
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Design Tools


LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

To launch a ready to run LTspice demonstration circuit for this part:

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