LINEAR Manuals

The LTC3731H 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. It has features such as Burst Mode, OPTI-LOOP, and PolyPhase.

The LTC1622 is a constant frequency current mode step-down DC/DC controller providing excellent AC and DC load and line regulation. The device incorporates an accurate undervoltage feature that shuts the LTC1622 down when the input voltage falls below 2V. The LTC1622 boasts a ±1.9% output voltage accuracy and consumes only 350µA of quiescent current. For applications where efficiency is a prime consideration and the load current varies from light to heavy, the LTC1622 can be configured for Burst Mode TM operation. Burst Mode operation enhances low current efficiency and extends battery run time. Burst Mode operation is inhibited during synchronization or when the SYNC/MODE pin is pulled low to reduce noise and possible RF interference. High constant operating frequency of 550kHz allows the use of a small inductor. The device can also be synchronized up to 750kHz for special applications. The high frequency operation and the available 8-lead MSOP package create a high performance solution in an extremely small amount of PCB area. To further maximize the life of the battery source, the P-channel MOSFET is turned on continuously in dropout (100% duty cycle). In shutdown, the device draws a mere 15µA.

The LT1512 is a 500kHz current mode switching regulator specially configured to create a constant-current/constant-voltage battery charger. It has a current sense feedback circuit for accurately controlling output current and supports flyback or SEPIC topology chargers. It allows charging even when the input voltage is lower than the battery voltage, has a maximum switch current of 1.5A, and 1% voltage accuracy for lithium battery applications.

The LTC1872 is a constant frequency current mode step-up DC/DC controller providing excellent AC and DC load and line regulation. The device incorporates an accurate undervoltage lockout feature that shuts down the LTC1872 when the input voltage falls below 2.0V. The LTC1872 boasts a ±2.5% output voltage accuracy and consumes only 270µA of quiescent current. For applications where efficiency is a prime consideration, the LTC1872 is configured for Burst Mode operation, which enhances efficiency at low output current. In shutdown, the device draws a mere 8µA. The high 550kHz constant operating frequency allows the use of a small external inductor. The LTC1872 is available in a small footprint 6-lead SOT-23.

This is a design note about radio frequency identification (RFID) technology. It introduces a high performance RFID receiver, which uses direct conversion technology to demodulate an RF carrier directly to a baseband signal without an intermediate frequency down-conversion.

The LTC1749 is an 80Msps, 12-bit A/D converter designed for digitizing wide dynamic range signals up to frequencies of 500MHz. The input range of the ADC can be optimized with the on-chip PGA sample-and-hold circuit and flexible reference circuitry.

This document introduces the LT1794 dual 500mA, 200MHz xDSL line driver amplifier, which meets all the requirements for full-rate, downstream ADSL line drivers. The device has a minimum output current of ±500mA, an output swing of ±11.1V, VS = ±12V, RL = 100Ω, an output swing of ±10.9V, VS = ±12V, IL = 250mA, low distortion: -82dBc@1MHz, 2VP-P input 50Ω, power-saving adjustable supply current, power-enhanced compact packaging: 20-Lead TSSOP and 20-Lead SW, 200MHz gain bandwidth, 500V/µS slew rate, specified at ±15V, ±12V and ±5V, high-density ADSL central office line drivers, high-efficiency ADSL, HDSL2, G.lite, SHDSL line drivers, buffers, test equipment amplifiers, cable drivers.

The LT3710 is a high efficiency step-down switching regulator intended for auxiliary outputs in single secondary winding, multiple output power supplies. The LT3710 drives dual synchronous N-channel MOSFETs and achieves high efficiency. With leading edge modulation, it operates well with either primary side peak current or voltage mode control. It is synchronized to the falling edge of the transformer secondary winding and can be used in both single-ended and double-ended isolated power converter topologies. A high speed operational amplifier is incorporated to achieve optimum compensation and fast transient response. A user selectable discontinuous conduction mode improves light load efficiency. The LT3710 is available in a thermally enhanced TSSOP-16 exposed pad power package.

The LTC1922-1 is a high performance, zero voltage switched, phase shift, full-bridge power converter controller from LTC company. It integrates synchronous rectification function. It is ideal for developing isolated, low voltage, high current outputs from a high voltage input source.

LT1374 is a 500kHz monolithic buck mode switching regulator with a constant 500kHz switching frequency, high power 16-pin TSSOP package, and the use of surface mount components. It features a saturating switch design, wide output current range, and high efficiency.

LT1374 1374fd 4.5A, 500kHz Step-Down Switching Regulator

LT1584/LT1585/LT1587 7A, 4.6A, 3A Low Dropout Fast Response Positive Regulators Adjustable and Fixed Low voltage fast response positive output three terminal adjustable regulator

Low Noise, Low Power Signal Processing, Ultrasonic Amplifiers, Driving A/D Converters, Audio Amplifiers, Op Amps