Linear Technology Corp.
Milpitas, CA 95035
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Ballaster offers 3,000:1 dimming capability for 24 LEDs.
Designed to provide uniform LED brightness, Model LT3003 drives 3 separate strings of LEDs with 3% accurate current matching and up to 350 mA continuous current per LED string. True Color PWM Dimming(TM) enables dimming ratios up to 3,000:1 with logic level signal at PWM pin for all modes without need of external level shifting circuitry. Housed in 10-lead, thermally enhanced, MSOP-10 package,...
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Power Controllers drive P-channel MOSFETs.
Designed to work with slow moving input supplies, PowerPath(TM) LTC4416 provides soft-off feature to minimize droop when supply voltages are changing. Model LTC4416-1 is optimized for rapidly moving input supplies that must be quickly turned off. With voltage range of 3.6-26 V and operating temperature of -40 to +125Ã-
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Buck-Boost DC/DC Converter extends battery run-time.
With input range of 1.8-5.5 V and output of 1.8-5.25 V, synchronous Model LTC3530 is compatible with single-cell Li-Ion or dual-cell alkaline/NiCad/NiMH applications. Unit delivers up to 600 mA of output current to regulated output voltage with inputs above, below, or equal to output. Burst Mode operation requires 40 Ã-µA of quiescent current while shutdown current is less than 1 Ã-µA....
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Step-Down DC/DC Converter delivers 2 A per channel.
Housed in 20-lead TSSOP-20E package, dual current mode Model LT3510 features 2 internal 2.5 A power switches. Each channel is capable of delivering up to 2 A of continuous output current at efficiencies up to 88%. Switching frequency is user-programmable between 250 kHz and 1.5 MHz. With input range of 3.3-25 V, converter can regulate power from 5 and 12 V rails, unregulated wall transformers,...
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Amplifiers optimize distortion power and noise performance.
Integrating precision gain-setting resistors on-chip, Model LT6402 and LT6411 differential amplifiers can be used as high-speed ADC drivers, twisted-pair line drivers, and single-ended to differential signal converters. Model LT6402 has -3 dB bandwidth of 300 MHz, and is available in 6, 12, and 20 dB fixed gain options. With -3 dB bandwidth of 650 MHz and slew rate of 3,300 V/Ã-µs, Model...
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DC/DC Controller uses standard 5 V N-Channel MOSFETs.
In addition to DC/DC step-down synchronous controller, Model LT3740 integrates DC/DC step/up converter for generating its own MOSFET gate drive voltage. Unit converts input supplies from 2.2-22 V to output as low as 0.8 V and at load currents from 2-20 A with 93% typical efficiency. Housed in 16-lead, 5 x 3 mm DFN package, Model LT3740 operates at fixed frequency of 300 kHz and is suitable for...
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Step-Down DC/DC Converter delivers 3 A per channel.
Dual current mode Model LT3501 features two internal 3.5 A power switches, each capable of delivering up to 3 A of continuous output current at efficiencies up to 88%. Housed in TSSOP-20E package, unit features user-programmable switching frequency between 250 kHz and 1.5 MHz. Input range of 3.3-25 V makes Model LT3501 suitable for regulating power from 5 and 12 V rails, unregulated wall...
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Under/Overvoltage Monitor suits tight-space applications.
Supplied in 8-lead ThinSOT(TM) or 3 x 2 mm DFN package, LTC2912 features voltage monitoring inputs with filtering to reject brief glitches and minimize false or noisy triggering. Undervoltage (UV) and overvoltage (OV) trip thresholds, programmed by external resistors, exhibit Ã-
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Delta-Sigma ADC ha 24-bit, 16-channel architecture.
Supplied in 5 x 7 mm QFN package, LTC2499 communicates via I2C-compatible serial interface and features Easy Drive(TM) front-end design that results in zero average differential input current. ADC can be driven directly from bridges, RTDs, thermocouples, and high-impedance sensors, and its rail-to-rail input signals can be directly digitized while maintaining dc accuracy of 2 ppm INL. Internal...
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Boost Converters feature integrated Schottky diode.
Housed in 3 x 2 mm DFN-8 package, Model LT3494 uses 180 mA power switch and delivers over 17 mA of current at 15 V, while Model LT3494A uses 350 mA switch and delivers over 27 mA of current. Input voltage range of 2.3-16 V enables operation from single-cell Li-Ion batteries up to fixed 12 V input rails, delivering outputs to 40 V. Quiescent current of 65 Ã-µA maximizes battery run-time, while...
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