LINEAR Manuals (Others)

LTC1274/LTC1277 12-Bit, 10mW, 100ksps ADCs with 1µA Shutdown are low-power, high-performance 12-bit ADCs that operate from a single 5V or ±5V supply and draw only 2mA (typ). They feature a 2µs sample-and-hold, a precision reference, and an internally trimmed clock. The products offer unipolar and bipolar conversion modes, and two power-down modes: Nap mode and Sleep mode.

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LTC1852/LTC1853 are 10-bit/12-bit, 400ksps, low power, sampling ADCs.

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This document introduces the LTC2631 series of 12-bit, 10-bit and 8-bit voltage output DACs, including their features, characteristics, and application scenarios.

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The LT ®1615/LT1615-1 are micropower step-up DC/DC converters in a 5-lead low profile (1mm) ThinSOT pack- age.

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The LT ®1612 is an 800kHz, synchronous step-down DC/ DC converter that operates from an input voltage as low as 2V. Internal 0.45Ω switches deliver output currents up to 500mA, and the 800kHz switching frequency allows the use of small, low value ceramic input and output capacitors. Input voltage ranges from 5.5V down to 2V and output voltage can be set as low as the 620mV reference. The device features Burst Mode TM operation, keeping efficiency high at light loads. Burst Mode operation can be defeated by pulling the MODE pin high, enabling constant switching throughout the load range for low noise. No-load quiescent current is 160µA and shutdown current is less than 1µA. The device is available in 8-lead SO and MSOP packages.

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The LTC ®3731 is a PolyPhase ® synchronous step-down switching regulator controller that drives all N-channel external power MOSFET stages in a phase-lockable fixed frequency architecture. The 3-phase controller drives its output stages with 120° phase separation at frequencies of up to 600kHz per phase to minimize the RMS current losses in both the input and output filter capacitors. The 3-phase technique effectively triples the fundamental frequency, improving transient response while operating each control- ler at an optimal frequency for efficiency and ease of ther- mal design. Light load efficiency is optimized by using a choice of output Stage Shedding or Burst Mode operation. A differential amplifier provides true remote sensing of both the high and low side of the output voltage at the point of load. The precision reference supports output voltages from 0.6V to 6V. Soft-start and a defeatable, timed short-circuit shutdown protect the MOSFETs and the load. Current foldback provides protection for the external MOSFETs under short-circuit or overload conditions.

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The LT1300 is a micropower step-up DC/DC converter that utilizes Burst Mode™ operation. The device can deliver 5V or 3.3V from a two-cell battery input. It features program- mable 5V or 3.3V output via a logic-controlled input, no- load quiescent current of 120µA and a shutdown pin which reduces supply current to 10µA. The on-chip power switch has a low 170mV saturation voltage at a switch current of 1A, a four-fold reduction over prior designs. A 155kHz internal oscillator allows the use of extremely small sur- face mount inductors and capacitors. Operation is guaran- teed at 1.8V input. This allows more energy to be extracted from the battery increasing operating life. The ILIM pin can be used to program peak switch current with a single resistor allowing the use of less expensive and smaller inductors and capacitors in lighter load applications. The LT1300 is available in an 8-lead SOIC package, minimizing board space requirements. For a 5V/12V output, the LT1300 can be used with two AA batteries or a single AAA battery.

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The LTC1690 is a low power receiver/driver pair that is compatible with the requirements of RS485 and RS422. The receiver offers a fail-safe feature that guarantees a high receiver output state when the inputs are left open, shorted together or terminated with no signal present. No external components are required to ensure the high receiver output state. Separate driver output and receiver input pins allow full duplex operation. Excessive power dissipation caused by bus contention or faults is prevented by a thermal shut- down circuit which forces the driver outputs into a high impedance state. The LTC1690 is fully specified over the commercial and industrial temperature ranges. The LTC1690 is available in 8-Pin SO, MSOP and PDIP packages.

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The LT1618 is a step-up DC/DC converter with constant current and constant voltage output characteristics. It is suitable for applications such as LED backlight drivers, USB-powered boost converters, input current limited boost converters, and battery chargers. The converter features accurate input/output current control, accurate output voltage control, wide input voltage range, high output voltage, high efficiency, and small size.

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The LT1737 is a monolithic switching regulator controller specifically designed for the isolated flyback topology. It features driving an external power MOSFET, a wide supply voltage range, and direct sensing of the output voltage from the primary side winding.

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LT1176 is a 1.2A switching regulator with a 100kHz switching frequency and excellent dynamic performance, which can be used for 5V positive buck converter, positive-to-negative converter, negative boost converter and flyback converter.

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LT1809/LT1810 low distortion rail-to-rail input and output op amps with a 350V/µs slew rate, 320MHz 3dB bandwidth, 180MHz gain-bandwidth product (AV≥10) and 85mA output current to meet the needs of low voltage, high performance signal conditioning systems.

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The LT3518 is a current mode DC/DC converter with an internal 2.3A, 45V switch specifi cally designed to drive LEDs.

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The LT1466L/LT1467L are dual/quad bipolar op amps that combine rail-to-rail input and output operation with precision specifications.

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LTC1062 1062fd 10Hz 5th Order Butterworth Lowpass Filter is a lowpass filter with no DC error, low passband noise, operates DC to 20kHz, operates on a single 5V supply or up to ±8V, 5th order filter, maximally flat response, internal or external clock, cascadable for faster rolloff, buffer available.

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LTC2258-12/LTC2257-12/LTC2256-12 are 12-bit sampling ADC converters designed for digitizing high frequency, wide dynamic range signals. They feature low power consumption, multiple output options, selectable input ranges, fast sampling rates, and optional configurations.

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The LTC3730 is a high performance, low power, three-phase synchronous buck controller with 5-bit Intel Mobile VID input and up to 600kHz switching frequency.

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The LT3473/LT3473A are micropower step-up DC/DC converters with integrated Schottky diode and output disconnect circuitry. They are suitable for OLED bias and CCD bias conversion. The features include small size, low quiescent current, internal 1A, 36V switch, integrated Schottky diode, and PNP output disconnect, etc.

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The LT1738 1738fa is a low EMI, single-ended-driven, adjustable-frequency boost/buck converter with ultralow noise.

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The LT1028/LT1128 are ultralow noise, precision high speed op amps with 0.85nV/√Hz 1kHz noise, 1.0nV/√Hz 10Hz noise.

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