LTM8042 Datasheet | Linear Technology

Features n True Color PWM™ with 3000:1 Dimming Ratio n Operates in Boost, Buck Mode or Buck-Boost Mode n Wide Input Voltage Range: Operation from 3V to 30V Transient Protection to 40V n Gate Driver for Optional PWM Dimming with P-channel MOSFET n Adjustable Frequency: 250k Hz to 2MHz n Constant-Current and Constant-Voltage Regulation n Low Shutdown Current: <1μA n Ro HS pliant Package with Gold Pad Finish n Tiny, Low Profile (9mm × 15mm × 2.82mm) Surface Mount LGA Package APPLICATIONS n Display Backlighting n Automotive and Avionic Lighting n Illumination n Scanners L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks and True Color PWM is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. LTM8042/LTM8042-1 µModule Boost LED Driver and Current Source DESCRIPTION The LTM®8042 is a plete µModule® Boost LED Driver specifically designed to drive LEDs up to 1A, while the LTM8042-1 drives up to 350m A. It bines a boost power topology with a unique current loop to operate as a constant-current source. The PWM input provides as much as 3000:1 LED dimming, while 10:1 analog dimming can be acplished by a single resistor or analog voltage applied to the CTL pin. As with any boost topology, the LTM8042/LTM8042-1 has an uninterrupted current path between its input and output and is thus intolerant to a short-circuit or overload from the output to ground. # WHITE LEDS 6 7 8 9 LED CURRENT 1A 350m A 1A 350m A 12VIN LTM8042 LTM8042-1 24VIN LTM8042 LTM8042-1 The LTM8042/LTM8042-1 is packaged in a thermally enhanced, pact overmolded land grid array (LGA) package. The LTM8042/LTM8042-1 is Pb-free and a Ro HS pliant. TYPICAL APPLICATION µModule Boost LED Driver, Driving 8 White LEDs at 1A VIN 16V TO 26V 4.7µF VCC LTM8042 RUN BSTIN/BKLED- LED+ TG PWM BSTOUT/BKIN SYNC TGEN SS RT GND CTL 33.2k f SW = 550k Hz UP TO 26.8V...