LT3519

LT3519/LT3519-1/LT3519-2 LED Driver with Integrated Schottky Diode FEATURES n Up to 3000:1 True Color PWM™ Dimming n Wide Input Voltage Range Operation from 3V to 30V Transient Protection to 40V n Rail-to-Rail LED Current Sense from 0V to 45V n 45V, 750mA Internal Switch n Internal Schottky Diode n Constant-Current and Constant-Voltage Regulation n Boost, SEPIC, Buck-Boost Mode or Buck Mode Topology n Open LED Protection and Open LED Status Pin n Programmable Undervoltage Lockout with Hysteresis n Fixed Frequency: 400kHz (LT3519), 1MHz (LT3519-1), 2.2MHz (LT3519-2) n Internal Compensation n CTRL Pin Provides Analog Dimming n Low Shutdown Current: <1μA n 16-Lead MSOP Package DESCRIPTION The LT®3519/LT3519-1/LT3519-2 are fixed frequency step-up DC/DC converters designed to drive LEDs. They 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 these converters to operate as a constant-voltage source or constant-current source. Internal compensation simplifies applications. These devices 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 analog dimming. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Techno...