Linear Technology Corp.
Milpitas, CA 95035
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Gauge measures battery capacity in handheld PCs.
Model LTC4150 bi-directional Coulomb counter monitors current through small sense resistor between battery and load or charger circuit. It indicates charge and discharge of battery through series of output pulses over single communication pin that can be counted by microcontroller. Supporting 1- or 2-cell LI-Ion and 3 to 6-cell NiCd or NiMH batteries, unit allows PDAs, cellular phones, and...
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Differential Amplifier is optimized for video applications.
Model LT6552 3.3 V wideband difference amplifier minimizes effects of high-frequency noise pickup, allowing signals to be sent over long lines without corruption by external sources. Common mode rejection is >60 dB at 10 MHz. Unit comes in 3 x 3 mm DFN package and features 75 MHz -3 dB bandwidth, 600 V/Ã-µs slew rate, and Ã-
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Rail-to-Rail Op Amp features 3-12 V operation.
Current feedback amplifier, Model LT6210 offers adjustable supply current that is programmable from 300 Ã-µA to 6 mA with corresponding bandwidth from 10-200 MHz. By changing one resistor, each LT6210 can be configured to attain specific bandwidth and slew rate for given supply current. Unit is offered in 6-lead ThinSOT(TM) package and can be used as video line driver pre-amp, buffer, or...
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Demodulators suit high linearity applications.
Models LT5515 and LT5516 Direct Conversion Quadrature Demodulators integrate signal splitter, 2 high linearity down-converting mixers, local oscillator quadrature generator, and 260 MHz bandwidth output buffers with single-pole, low pass filters on each output. Model LT5515 operates over input frequency of 1.5-2.5 GHz, and Model LT5516 operates with RF input from 0.8-1.5 GHz. Units simplify...
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PWM Controller suited for DC/DC power converters.
Low-profile (1 mm) 6-pin ThinSOT(TM) PWM LTC3803 current mode DC/DC controller works with flyback power supplies with 1-25+ W of output power. With adjustable slope compensation and 40 Ã-µA start-up current, product offers integrated soft-start function and can be powered with inputs from 10-100 V through resistor. Unit operates at constant 200 kHz frequency, provides Ã-
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Synchronous Step-Down Regulator is 96% efficient.
Offered in low-profile, 5-lead ThinSOT(TM) package, LTC3406B-2 synchronous buck regulator delivers up 600 mA of continuous output current. Using constant frequency and current mode architecture, unit operates from input voltage of 2.5-5.5 V. It generates output voltages as low as 0.6 V and has 2.25 MHz switching frequency that keeps noise out of AM radio and xDSL frequency bands. Regulator...
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Battery Charger supports multi-year back-up applications.
Model LTC4064, housed in 5 x 3 mm footprint 10-lead MSOP package, charges to float voltage of 4 V to slow battery aging and capacity degradation during periods of non-use. Unit autonomously performs charging, pre-conditioning, charge termination, re-charging, temperature monitoring, and fault detection. Thermal regulation allows maximum charge current without risk of overheating, while external...
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Synchronous Boost Converter has 5 A switch current.
Low-profile LTC3425 incorporates 4-phase switching topology, operates at frequencies up to 8 MHz, and delivers output voltages of up to 5.25 V from input voltage range of 0.5-4.5 V. It provides up to 3 A continuous output current from 32-lead, 5 x 5 mm QFN package with less than 2 mm profile. Internal switches deliver efficiencies as high as 95%. Automatic or manual Burst ModeÃ-® operation...
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Multi-Display Driver features digital control.
Model LTC3205 is an 800 kHz, low-noise, step-up/step-down fractional charge pump converter that can drive 1-4 LED main display, 1-2 LED sub-display, plus RGB display in 4 x 4 mm QFN package. Each display has digital control with independent dimming and programming via 3-wire serial interface. Input voltage is 2.7-4.5 V. Driven from single cell Li-Ion battery, efficiencies reach 92% while...
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Rail-to-Rail Operational Amplifiers draw less than 1 mA.
Models LT6220 single, LT6221 dual, and LT6222 quad rail-to-rail input and output precision op amps are rated at 60 MHz and can operate from supplies of 2.3-12.6 V. Characteristics include 350 Ã-µV max input offset voltage, 150 nA max input bias current, 82 dB CMRR, and 90 dB voltage gain. Devices have output current capability of 50mA for driving heavy loads. They are rated for 0 to 70Ã-
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