LINEAR Manuals

The document introduces the LT3464 micropower boost DC/DC converter, which features a small size, low quiescent current, integrated Schottky diode and output disconnect circuit, and provides short-circuit protection. It supports internal reference voltage override function.

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The LT1776 is a wide input range, high efficiency Buck (step-down) switching regulator. It can accept input voltages as high as 60V and contains an output switch rated at 700mA peak current. Current mode control delivers excellent dynamic input supply rejection and short-circuit protection.

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The LTC1155 is a dual high side gate driver that allows the use of low-cost N-channel FETs for high side switching applications. It fully enhances an N-channel MOSFET without the need for external components. Its micropower operation allows use in virtually all systems with maximum efficiency.

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The LT3474 is a fixed frequency step-down DC/DC converter designed to operate as a constant-current source.

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This document introduces the LT ®1182/LT1183/LT1184/LT1184F CCFL/LCD Contrast Switching Regulators products, including the product supported input voltage range, output current, switching frequency, lamp configuration, protection circuit, etc.

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The product is a 18-channel LED driver, supporting 18 20mA LED current sources, and each current source can be independently controlled by I2C interface for brightness, on/off, blinking and gradation.

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The LTC3208 is a highly integrated multidisplay LED controller. It features a high-efficiency, low-noise charge pump that provides power to the MAIN, SUB, RGB, CAM, and AUX LED displays. Dimming and on/off control for all displays are achieved through the I2C serial interface. The MAIN and SUB displays offer 256 brightness levels, while the RGB and CAM displays offer 16 brightness levels.

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The LT1768 is a chip designed to control single or multiple cold cathode fluorescent lamps (CCFL) displays. It uses a unique multi-mode dimming scheme that combines both linear and PWM control functions to maximize lamp life, efficiency, and dimming range. The LT1768 can detect and protect against lamp failures and overvoltage start-up conditions. It is designed to provide maximum flexibility with a minimum number of external components. The LT1768 is a high power application's 1.5A MOSFET driver current mode PWM controller. It contains a 350kHz oscillator, 5V reference, and a current sense comparator with a 100mV threshold. It operates from an 8V to 24V input voltage. The LT1768 also has undervoltage lockout, thermal limit, and a shutdown pin that reduces supply current to 65µA. It is available in a small 16-lead SSOP package.

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The LTC3216 is a low noise, high current charge pump DC/DC converter designed to power high current LEDs. The part includes an accurate programmable current source capable of driving loads up to 1A from a 2.9V to 4.4V input. Low external parts count (two flying capacitors, two programming resistors and two bypass capacitors at VIN and CPO) make the LTC3216 ideally suited for small, battery-powered applications. Built-in soft-start circuitry prevents excessive inrush current during start-up.

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The LTC2485 is a low-power, high-precision, 24-bit, zero-latency ∆Σ ADC with integrated Easy Drive technology and I2C interface. It features zero differential input current, no latency digital filtering, automatic temperature compensation, a single-chip oscillator, and six available addresses. It is widely used in industrial process control, measurement instruments, direct temperature measurement, direct sensor digitization, and other fields.

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The LTC3454 is a synchronous buck-boost DC/DC converter optimized for driving a single high power LED at currents up to 1A from a single cell Li-Ion battery in- put. The regulator operates in either synchronous buck, synchronous boost, or buck-boost mode depending on input voltage and LED forward voltage. PLED/PIN effi ciency greater than 90% can be achieved over the entire usable range of a Li-Ion battery (2.7V to 4.2V).

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The LT ®1678/LT1679 are dual/quad rail-to-rail op amps offering both low noise and precision:

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The LTC1623 SMBus switch controller is a slave device that controls two high-side N-channel MOSFETs on either the SMBus or the I2C bus. It operates with an input voltage from 2.7V to 5.5V and has a low standby current of 14µA. It has 16 available switches on the same bus and supports a VIL of 0.6V and VIH of 1.4V for DATA and CLK. It is suitable for computer peripheral control, laptop computer power plane switching, portable equipment power control, industrial control systems, and handheld equipment.

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The LT®3478/LT3478-1 are 4.5A step-up DC/DC converters designed to drive LEDs with True Color PWM™ dimming, delivering constant LED color with up to 3000:1 range

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This datasheet provides details about the LT6220/LT6221/LT6222's features, including low voltage, high frequency signal processing, driving A/D converters, rail-to-rail buffer amplifiers, active filters, video amplifiers, fast current sensing amplifiers, etc.

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The LTC3215 is a low noise, high current charge pump DC/DC converter designed to power high current LEDs. The part includes an accurate programmable current source capable of driving loads up to 700mA from a 2.9V to 4.4V input. Low external parts count (two flying capacitors, one programming resistor and two bypass capacitors) makes the LTC3215 ideally suited for small, battery-powered applications. Built-in soft-start circuitry prevents excessive inrush cur- rent during start-up. High switching frequency enables the use of small external capacitors. LED current is pro- grammed with an external resistor. The LED is discon- nected from VIN during shutdown. An ultralow dropout current source maintains accurate LED current at very low I

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This document introduces the LTC2484/LTC2484F 24-bit No Latency ∆Σ analog-to-digital converter, which uses patented Easy Drive technology to eliminate dynamic input current errors and the shortcomings of on-chip buffering through automatic cancellation of differential input current.

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The LT®1677 features the lowest noise performance available for a rail-to-rail operational amplifier: 3.2nV/√Hz wideband noise, 1/f corner frequency of 13Hz and 90nV peak-to-peak 0.1Hz to 10Hz noise. Low noise is combined with outstanding precision: 20µV offset voltage and 0.2µV/°C drift, 130dB common mode and power supply rejection and 7.2MHz gain bandwidth product. The com- mon mode range exceeds the power supply by 100mV. The voltage gain of the LT1677 is extremely high, 19 million (typical) driving a 10k load. In the design, processing and testing of the device, particular attention has been paid to the optimization of the entire distribution of several key parameters. Consequently, the specifications have been spectacularly improved compared to competing rail-to-rail amplifiers.

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The LTC ®3722-1/LTC3722-2 phase shift PWM controllers provide all of the control and protection functions necessary to implement a high efficiency, zero voltage switched (ZVS), full bridge power converter.

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The LTC3219 is a highly integrated multidisplay LED driver. The device contains a high efficiency, low noise charge pump to provide power to nine universal LED current sources. The LTC3219 requires only five small ceramic capacitors to form a complete LED power supply and current controller. The maximum display currents are set by an internal precision current reference. Independent dimming, On/Off, blinking and gradation control for all current sources is achieved via the I2C serial interface. 6-bit linear DACs are available for adjusting brightness levels for each universal LED current source. The LTC3219 charge pump optimizes efficiency based on the voltage across the LED current sources. The device powers up in 1x mode and will automatically switch to boost mode whenever any enabled LED current source begins to enter dropout. The first dropout switches the IC into 1.5x mode and a subsequent dropout switches the LTC3219 into 2x mode. The part resets to 1x mode whenever a data register is updated via the I2C port.

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