LT3519EMS-2#PBF

LT3519-2 is a fixed frequency step-up DC/DC converter designed to drive LEDs. It feature an internal 45V, 750mA low side switch and Schottky diode. Combining a traditional voltage feedback and a unique rail-to-rail current sense feedback allows this converter to operate as a constant-voltage source or constant-current source. Internal compensation simplifies applications. This device feature rail-to-rail LED current sense pins that provide the most flexibility in choosing a converter configuration to drive the LEDs. The LED current is externally programmable with a sense resistor. The external PWM provides up to 3000:1 PWM dimming and the CTRL input provides analogue dimming. It is widely used in application such as automotive, industrial, constant current source, current limited constant voltage source etc.

• VIN operating voltage range is 3V to 30V
• VIN supply current is 0.1μA typical
• Rail-to-rail LED current sense from 0V to 45V
• Switch current limit is 980mA typical
• Switch VCESAT is 300mV typical
• Internal schottky diode, constant-current and constant-voltage regulation
• Open LED protection and open LED status pin, programmable undervoltage lockout with hysteresis
• Internal compensation, CTRL pin provides analogue dimming
• Operating temperature is -40°C to 125°C
• Package style is 16-lead plastic MSOP

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party