Linear Technology manuals, page 50
LINEAR TECHNOLOGY LTC3425 Manual
LTC3425 is a synchronous, 4-phase boost converter with output disconnect capable of operation below 1V input. It includes four N-channel MOSFET switches and four P-channel synchronous rectifiers for an effective RDS(ON) of 0.045Ω and 0.05Ω, respectively. 4-phase operation greatly reduces peak inductor currents, and capacitor ripple current, and increases effective switching frequency, minimizing inductor and capacitor sizes. True output disconnect eliminates inrush current and allows zero load current in shutdown. External Schottky diodes are not required.
LINEAR TECHNOLOGY LTC1142/LTC1142L/LTC1142HV Dual High Efficiency Synchronous Step-Down Switching Regulators handbook
The LTC1142/LTC1142L/LTC1142HV are dual synchronous step-down switching regulator controllers featuring automatic Burst Mode™ operation to maintain high efficiencies at low output currents. The devices are composed of two separate regulator blocks, each driving a pair of external complementary power MOSFETs, at switching frequencies up to 250kHz, using a constant off-time current mode architecture providing constant ripple current in the inductor. The operating current level for both regulators is user programmable via an external current sense resistor. Wide input supply range allows operation from 3.5V* to 18V (20V maximum). Constant off-time architecture provides low dropout regulation limited only by the RDS(ON) of the external MOSFET and resistance of the inductor and current sense resistor. The LTC1142 series is ideal for applications requiring dual output voltages with high conversion efficiencies over a wide load current range in a small amount of board space. Dual Outputs: 3.3V and 5V or User Programmable Ultrahigh Efficiency: Over 95% Possible Current Mode Operation for Excellent Line and Load Transient Response High Efficiency Maintained over 3 Decades of Output Current Low Standby Current at Light Loads: 160µA/Output Independent Micropower Shutdown: IQ < 40µA Wide VIN Range
LINEAR TECHNOLOGY LTC1484 Manual
The LTC®1484 is a low power RS485 compatible transceiver with 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. The LTC1484 can also drive low cost residential telephone wires.
LINEAR TECHNOLOGY LT1120 Manual
The LT1120 is a combination micropower positive regulator and free collector comparator on a single monolithic chip. With only 40µA supply current, the LT1120 can supply over 125mA of output current. Input voltage range is from 4.5V to 36V and dropout voltage is 0.6V at 125mA. Dropout voltage decreases with lower load currents. Also included on the chip is a class B output 2.5V reference that can either source or sink current. A shutdown pin allows logic shutdown of the output. The comparator can be used for system or battery monitoring. For example, the comparator can be used to warn of low system voltage. Frequency compensation of the comparator for amplifier applications can be obtained by adding external output capacitance. The 2.5V reference will source or sink current. This allows it to be used as a supply splitter or auxiliary output.
LINEAR TECHNOLOGY LTC1707 Manual
The LTC ®1707 is a high efficiency monolithic current mode synchronous buck regulator using a fixed frequency architecture. The operating supply range is from 8.5V down to 2.85V, making it suitable for both single and dual lithium-ion battery-powered applications. Burst Mode op- eration provides high efficiency at low load currents. 100% duty cycle provides low dropout operation, extend- ing operating time in battery-powered systems. The switching frequency is internally set at 350kHz, allowing the use of small surface mount inductors. For noise sensitive applications it can be externally synchro- nized up to 550kHz. Burst Mode operation is inhibited during synchronization or when the SYNC/MODE pin is pulled low preventing low frequency ripple from interfer- ing with audio circuitry. Soft-start is provided by an external capacitor. The internal synchronous MOSFET switch increases effi- ciency and eliminates the need for an external Schottky diode, saving components and board space.
LINEAR TECHNOLOGY LTC3718 Manual
The LTC3718 is a 1.5V input voltage, synchronous buck/boost controller, for DDR/QDR memory termination. It features low input voltage, fast transient response, high efficiency, true current mode control and more.
LINEAR TECHNOLOGY LT1881/LT1882 Manual
Low-voltage single supply op amps LT1881/LT1882 feature high accuracy input performance and RRO output swing.
LINEAR TECHNOLOGY LTC3719 Manual
The LTC3719 is a 2-phase, VID programmable, synchronous step-down switching regulator controller that drives two N-channel external power MOSFET stages in a fixed frequency architecture. The 2-phase controller drives its two output stages out of phase at frequencies up to 300kHz to minimize the RMS ripple currents in both input and output capacitors. The 2-phase technique effectively multiplies the fundamental frequency by two, improving transient response while operating each channel at an optimum frequency for efficiency. Thermal design is also simplified. An operating mode select pin (FCB) can be used to select among three modes including Burst Mode operation for highest efficiency. An internal differential amplifier provides true remote sensing of the regulated supply’s positive and negative output terminals as required in high current applications. The RUN/SS pin provides soft-start and optional timed, short-circuit shutdown. Current foldback limits MOSFET dissipation during short-circuit conditions when the overcurrent latchoff is disabled. OPTI-LOOP compensation allows the transient response to be optimized for a wide range of output capacitors and ESR values. 2-Phase, High Efficiency, Step-Down Controller for AMD Opteron CPUs.
LINEAR TECHNOLOGY LT1004 Manual
The LT1004 is a 2-terminal bandgap reference diode designed to provide high accuracy and excellent temperature characteristics at very low operating currents. It has an initial accuracy of ±4mV, an operating current of 10µA, and can operate up to 20mA.
LINEAR TECHNOLOGY LTC1148 LTC1148-3.3/LTC1148-5 Manual
The LTC1148 series is a family of synchronous step-down switching regulator controllers featuring high efficiency, current-mode operation, and low power consumption.
LINEAR TECHNOLOGY LT1766/LT1766-5 Manual(1)
The LT ®1766/LT1766-5 is a 200kHz monolithic buck switching regulator that accepts input voltages up to 60V. The device features high efficiency, a 0.2 ohm switch, 1.5 ampere peak switch current and a constant 200 kHz switching frequency.
LINEAR TECHNOLOGY - 1 LTC3737 handbook
LINEAR TECHNOLOGY - LTC3703 handbook
The LTC3703 is a synchronous step-down switching regulator controller from LTC company that can directly step down voltages up to 100V, making it ideal for telecom and automotive applications. The LTC3703 uses a constant frequency (up to 600kHz), voltage mode architecture to drive external N-channel MOSFETs. A precise internal reference provides 1% DC accuracy. A high bandwidth error amplifier and patented line feed forward compensation provide very fast line and load transient response. Strong 1Ω gate drivers allow the LTC3703 to drive multiple MOSFETs for higher current applications. The operating frequency is user programmable from 100kHz to 600kHz and can also be synchronized to an external clock for noise-sensitive applications. Current limit is programmable with an external resistor and utilizes the voltage drop across the synchronous MOSFET to eliminate the need for a current sense resistor.
LINEAR TECHNOLOGY LTC3728 3728fc Dual 550kHz 2-Phase Synchronous Step-Down Switching Regulator Manual
LTC3728 is a high-efficiency dual 5V/3.3V step-down converter with ±1% output voltage accuracy.
LINEAR TECHNOLOGY LTC485Low Power RS485 Interface Transceiver
LTC485 is a low power differential bus/line transceiver designed for multipoint data transmission standard RS485 applications with extended common mode range (12V to –7V). It also meets the requirements of RS422. CMOS design offers significant power savings over its bipolar counterpart without sacrificing ruggedness against overload of ESD damage. The driver and receiver feature three-state outputs, with the driver outputs maintaining high impedance over the entire common mode range. Excessive power dissipation caused by bus contention or faults is prevented by a thermal shutdown circuit which forces the driver outputs into a high impedance state. The receiver has a fail-safe feature which guarantees a high output state when the inputs are left open. The LTC485 is fully specified over the commercial and extended industrial temperature range.