LT3518HUF#PBF - 

LED Driver, Buck-Boost, 3V to 30V input, 1 Output, 2.5 MHz switch-freq., 45V/2.3 A out, QFN-16

LT3518HUF#PBF - LED Driver, Buck-Boost, 3V to 30V input, 1 Output, 2.5 MHz switch-freq., 45V/2.3 A out, QFN-16

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Product Information

Boost, Buck, Buck-Boost
MSL 1 - Unlimited
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Product Overview

The LT3518HUF#PBF is a current mode DC/DC Converter with an internal 2.3A, 45V switch specifically designed to drive LEDs. The LT3518 operates as a LED driver in boost, buck mode and buck-boost mode. It combines a traditional voltage loop and unique current loop to operate as a constant-current source or constant-voltage source. Programmable switching frequency allows optimization of the external components for efficiency or component size. The switching frequency of the LT3518 can be synchronized to an external clock signal. The LED current is externally programmable with a 100mV sense resistor. The external PWM input provides 3000:1 LED dimming. The CTRL pin provides further 10:1 dimming ratio.
  • Open LED protection
  • Gate driver for PMOS LED disconnect
  • Constant-current and constant-voltage regulation
  • <1µA Low shutdown current
  • 100mV High-side current sense


LED Lighting, Automotive, Avionics, Consumer Electronics


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Alternatives Available

1432694 - Led Driver, 1 Output, Boost, Buck, Buck-Boost, 3V-30V in, 2.5MHz switch, 7V/1.5A out, QFN-16

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