LINEAR Manuals

This design note describes a positive-to-negative voltage converter (P2N) that can produce a stable output voltage even with a widely varying input. This topology is particularly useful for battery-powered devices, where the battery voltage can vary significantly over time. The P2N can also be used in other applications where a stable output voltage is required, such as in wireless radios.

The LTC3811 is a high accuracy, high bandwidth, dual output, fixed frequency current mode DC/DC switching regulator controller designed for one of today’s most demanding power supply applications: high current, low voltage processor core supplies.

The LT3580 is a 2A, 42V integrated switch DC/DC converter that can be used in multiple topologies such as boost, SEPIC, flyback, and Cuk. It can use a single resistor to set either positive or negative output, making it easy for designers to use a single component list. The LT3580 also has soft-start, adjustable frequency, synchronization, and a wide input range, all in a small package.

The document introduces the LT3572 device produced by Linear Technology company. This is a dual full-bridge driver for piezo motors. The device uses a 4mm × 4mm QFN package, integrates a step-up regulator and a full-bridge driver, and can output up to 40V of drive voltage from a low input voltage (2.7V to 10V).

The LTC4223 is a dual Hot Swap™ controller that meets the power requirements of the MicroTCA specification. It includes an internal 3.3V auxiliary supply channel and an external N-channel driver for the 12V payload supply. It controls the inrush current for both supplies, provides overcurrent protection, and features an adjustable analog current limit. Additionally, it provides power-good outputs for the two supplies, a fault output, card detection, and independent control of the two supplies.

This document describes the features and performance of the LTM4605 and LTM4607 μModule™ buck-boost regulators. These regulators have features such as high efficiency, compact size, high performance, and exceptional thermal performance.

This design note introduces signal chain noise analysis for RF-to-Digital receivers. It describes the various components in the signal chain, such as mixers, low-noise amplifiers, and demodulators, and how to use them to achieve the best performance.

This document mainly introduces the features of the LTC3524 power chip, which can power small-sized TFT LCD screens and provide white LED backlight.

The LT®3507 is a single IC with three step-down converters and a low dropout linear regulator driver. It is suitable for high current, low voltage power supplies in industrial and automotive applications. It is compact and simple compared to multi-chip solutions.

The LTC ®3562 quad output step-down regulator is designed for multicore handheld microprocessor applications that operate from a single Li-Ion battery. Its four monolithic, high effi ciency buck regulators support Intel’s mobile CPU P-State and C-State energy saving operating modes. The output voltages are independently controllable via I2C, and each output can be independently started and shut down. Design- ers can choose from power saving pulse-skipping mode or Burst Mode ® operation, or select low noise LDO mode. The space-saving LTC3562 is available in a 3mm × 3mm QFN package and requires few external components.

The document describes a high-efficiency step-down DC/DC converter that can operate from a very low input voltage of 2.2V. The converter utilizes the LT3740 synchronous controller, which can convert input supplies ranging from 2.2V to 22V to outputs as low as 0.8V with load currents from 2A to 20A. It is suitable for applications such as distributed power systems, point-of-load regulation, and conversion of logic supplies.

This document discusses the protective role of ideal diodes in power supply wiring errors. By using MOSFET-based ideal diodes instead of Schottky diodes, power dissipation can be significantly reduced, thermal layout can be simplified, and system efficiency can be improved.

This document introduces LT3482, an integrated DC/DC step-up converter and accurate current monitor, which can support up to 90V APD bias voltage and provide better than 10% accuracy over four decades of dynamic range (250nA to 2.5mA).

The LTM8040 is a complete step-down DC/DC switching converter system that can drive up to 1A through a string of LEDs. Its 4V to 36V input voltage range makes it suitable for a wide range of power sources, including 2-cell lithium-ion battery packs and rectified 12V AC power.