Products, Materials & Tools | Sep 30, 2010

LTM8042 and LTM8042-1: uModule LED String Drivers with 40VIN Transient Protection

Linear Technology Corporation introduces the LTM8042 and LTM8042-1, DC/DC uModule® LED drivers for strings of up to 8 white LEDs or 9 red LEDs. Capable of operating as boost, buck or buck-boost with 3V to 30V input voltage range, each device is a complete LED driver solution in a 9mm x 15mm x 2.8mm LGA (land grid array) package.

Features:
True Color PWM™ with 3000:1 Dimming Ratio
Operates in Boost, Buck Mode or Buck-Boost Mode
Wide Input Voltage Range:
Operation from 3V to 30V
Transient Protection to 40V
Gate Driver for Optional PWM Dimming with P-channel MOSFET
Adjustable Frequency: 250kHz to 2.5MHz
Constant-Current and Constant-Voltage Regulation
Low Shutdown Current: <1μA
RoHS Compliant Package with Gold Pad Finish
Tiny, Low Profile (9mm × 15mm × 2.82mm) Surface Mount LGA Package

The LTM8042 and LTM8042-1 boast 0.5% output current line regulation accuracy and can withstand up to 40V input transients. The LTM8042 sources up to 1A of current, whereas the LTM8042-1 sources up to 350mA. Each features True Color PWM™ dimming with 3,000:1 ratio or analog dimming with 10:1 ratio. Their compact, robust, and complete solution permit a quick design-to-fabrication of LED string driver circuits in applications such as industrial illumination, backlight displays, scanners, and automotive as well as avionics lighting.

The LTM8042 and LTM8042-1 are switching regulator LED drivers with very accurate output current line regulation, ideal for driving LEDs or for general purpose current sourcing. Inductors, capacitors, regulator IC and compensation circuitry are enclosed and protected in a plastic package resembling an IC. These devices are pin-compatible with each other. For more information, visit www.linear.com/8042.

The LTM8042 and LTM8042-1 are rated for operation from -40ºC to 125ºC, priced starting at $8.59 each in 1000-piece quantities.

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