LINEAR Manuals

This article introduces a DPD (digital power detector) based RF front-end design method which can effectively suppress the noise and interference of the DPD loop, improve the dynamic range of the RF front-end, and reduce the cost.

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This document introduces the LTC3890 high-performance synchronous buck DC/DC controller, which can provide two output voltages ranging from 0.8V to 24V from an input voltage of 4V to 60V, and has high conversion efficiency and low static current. The device uses an integrated N-channel MOSFET driver and a current mode architecture to operate at a phase-lockable fixed frequency from 50kHz to 900kHz. The device has 99% duty cycle capability for low voltage dropout applications, adjustable soft-start or voltage tracking, and selectable continuous, pulse-skipping or Burst Mode operation, with a static current of only 50µA. These features, combined with the shortest on-time of just 95ns, make this controller an ideal choice for high step-down ratio applications.

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This document introduces an ultralow voltage energy harvester that uses a thermoelectric generator to power battery-free wireless sensors.

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The LTM4611 is a POL µModule DC/DC converter that operates from inputs as low as 1.5V, delivering up to 15A output, without an auxiliary bias supply.

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The document describes the LTC2938 and LTC2939 power monitors, which can monitor 4 or 6 power supplies, with a maximum voltage of 12V and a minimum voltage of 1.2V. The monitor has ±1.5% accuracy and watchdog timers.

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This document mainly introduces the characteristics of LT3741 power management chip. This chip is a synchronous buck DC/DC controller designed to regulate output currents up to 20A and output voltages up to 34V, with a current regulation accuracy of ±6% and a voltage accuracy of ±1.5%.

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The LTC3675 is a 4mm × 7mm IC that integrates seven regulated outputs and a dual-string LED driver.

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A robust energy harvesting system using the LTC3588-1 and LTC4071 is presented that can continuously run a 12.4mA, 1% duty cycle sensor/transmitter without grid power.

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The LTC554x series of passive mixers achieve the lowest noise figure with high linearity. The series offers excellent performance and is widely used in wireless infrastructure designs.

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Introduced the LT3579 and LT3581, which are high power monolithic switching regulators. They are integrated with 6A, 42V or 3.3A, 42V power switches, built-in fault protection and operation up to 2.5MHz

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Linear Technology has developed a line of µModule isolators that simplifies the design of isolated systems by simply plugging in a module, without the need for complex barrier components. µModule isolators use magnetically coupled techniques to provide data and power isolation in a single package, without the need for external components. The LTM2881 isolated RS485/RS422 transceiver and LTM2882 dual isolated RS232 transceivers use µModule isolator technology to provide complete transceiver-plus-power solutions in 15mm × 11.25mm × 2.8mm surface mount packages.

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This document describes the features and characteristics of LTC3388-1/LTC3388-3. The buck converter of this model has low quiescent current, sleep state, and standby mode, making it suitable for energy harvesting and low power applications.

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Solar panels have great potential as energy harvesting power sources, but they need batteries to store the harvested power and provide continuous power during dark periods. This article discusses a unique input regulation loop for a battery charger that simplifies the process of solar panel maximum power point tracking.

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The LTC2990 measures ambient and remote temperature, plus voltage and current, so the measurements are easily combined. Temperature sensors can be diodes or transistor sensors—remote sensor diodes are available as substrate diodes in large microprocessors.

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This document describes a simplified design of an isolated power supply. By examining the primary-side flyback pulse waveform, this product does not require opto-isolators or extra transformer windings to maintain regulation, and the output voltage can be easily programmed with two resistors.

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LTC4360, LTC4361 and LTC4362 are able to protect mobile devices from hot-plug transients and wrong power adapter.

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The LT3692A is a monolithic, dual 3A input/output buck converter with a 3V–36V operating range. The two channels are completely independent and can have different input voltages, output voltages, current limits, power good outputs, soft-start, undervoltage lockouts and even different synchronized switching frequencies.

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The LTC3113 is a single inductor buck-boost converter that offers a compact, highly efficient alternative. Internal low resistance switches allow the converter to support an impressive 3A of load current in a tiny 4mm × 5mm package. The LTC3113 offers an extended input and output operating voltage range from 1.8V to 5.5V, with peak efficiencies reaching 96%.

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Introduces a low IQ triple output synchronous boost/buck/buck controller LTC3859, that can continuously power electronic devices in automotive start-stop and always-on systems

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