LINEAR Manuals

The LTC2053 is a high precision instrumentation amplifier with adjustable gain, low offset voltage, and small temperature drift. It is suitable for applications such as thermocouple amplifiers, electronic scales, and medical instrumentation.

The LTM4600 is a high-efficiency DC/DC µModule with a 10A output current and an output voltage range of 0.6V to 5V. It features a high-efficiency design that does not require heat sinks or airflow to meet power specifications, and it has a fast transient response and fault protection features.

The LT3470 is a micropower step-down DC/DC converter that integrates a 300mA power switch, catch diode and boost diode into low profile 3mm x 2mm DD and ThinSOT packages. The LT3470 combines Burst Mode and continuous operation to allow the use of tiny inductor and capacitors while providing a low ripple output to loads of up to 200mA. With its wide input range of 4V to 40V, the LT3470 can regulate a wide variety of power sources, from 2-cell Li-Ion batteries to unregulated wall transformers and lead- acid batteries. Quiescent current in regulation is just 26µA in a typical application while a zero current shutdown mode disconnects the load from the input source, simpli- fying power management in battery-powered systems.

The LT1939 is a current mode PWM step-down DC/DC converter with an internal 2.3A switch. It is suitable for regulating power from a wide variety of sources (including automotive batteries, industrial supplies, and unregulated wall adapters). The adjustable/synchronizable fixed frequency operation from 250kHz to 2.2MHz allows for optimization between efficiency and external component size. It provides protection against a shorted output through cycle-by-cycle current limit, frequency foldback, and thermal shutdown. The soft-start feature controls the ramp rate of the output voltage, eliminating input current surge during start-up, and also provides output tracking. The LT1939 contains an internal NPN transistor with feedback control which can be configured as a linear regulator or as a linear regulator controller. Its low current shutdown mode (<12μA) enables easy power management in battery-powered systems.

LT3013 is a high voltage, micropower low dropout linear regulator. The device is capable of supplying 250mA of output current with a dropout voltage of 400mV. Designed for use in battery-powered or high voltage systems, the low quiescent current (65μA operating and 1μA in shutdown) makes the LT3013 an ideal choice. Quiescent current is also well controlled in dropout. Other features of the LT3013 include a PWRGD flag to indicate output regulation. The delay between regulated output level and flag indication is programmable with a single capacitor. The LT3013 also has the ability to operate with very small output capacitors. The regulator is stable with only 3.3μF on the output while most older devices require between 10μF and 100μF for stability. Small ceramic capacitors can be used without any need for series resistance (ESR) as is common with other regulators. Internal protection circuitry includes reverse-battery protection, current limiting, thermal limiting and reverse current protection. The device is available with an adjustable output with a 1.24V reference voltage. The LT3013 regulator is available in the thermally enhanced 16-lead TSSOP and the low profile (0.75mm), 12-pin (4mm × 3mm) DFN package, both providing excellent thermal characteristics.

The LT®1761 series are micropower, low noise, low dropout regulators that provide 100mA of output current in SOT-23 packages. The series features 20µVRMS of low noise, 20µA of low quiescent current, a wide input voltage range of 1.8V to 20V, 300mV of low dropout, and <0.1µA of extremely low shutdown current. Fixed output voltages are available at 1.2V, 1.5V, 1.8V, 2V, 2.5V, 2.8V, 3V, 3.3V, and 5V. Adjustable output voltage ranges from 1.22V to 20V. The series is stable with 1µF of output capacitance and operates with aluminum, tantalum, or ceramic capacitors. The series provides reverse battery protection, no reverse current, no need for protection diodes, and overcurrent and overtemperature protection. The series is available in a tiny 5-lead SOT-23 package.

LTC6652 is a precision, low drift, low noise buffered reference from LTC. It features an accuracy of ±0.05% and a temperature drift of less than 5ppm/°C, making it an ideal choice for automotive and high temperature applications.

The LT6106 is a versatile high side current sense amplifier with features such as low cost, high accuracy, and wide input voltage range. It is suitable for automotive, industrial, and power management applications.

The LTC ®3707 is a high performance dual step-down switching regulator controller that drives N-channel syn- chronous power MOSFET stages.

LTC3738 3738f is a 3-phase step-down switch- ing regulator controller from Linear Technology Corporation. It is mainly used in high-performance notebook computers, servers, desktop computers and workstations. The controller supports 3-phase synchronous step-down switching power supply, and can drive all N-channel external power MOSFET stages. The working frequency is 210kHz to 530kHz.

The LTC4257 is a complete power interface power supply chip designed for IEEE 802.3af PoE systems. It integrates 25k signature resistors, classification current sources, input current limiting with thermal foldback, undervoltage lockout, and power good signaling, all in a single 8-pin package. The chip integrates a high-voltage power MOSFET, which reduces the cost for system designers and saves board space. LTC4257 can directly interface with Linear Technology's various DC/DC converter products to provide an economical power solution for IP phones, wireless access points and other PDs. Linear Technology also provides solutions for PSE applications based on quad network power controllers. LTC4257 is available in 8-pin SO and low profile (3mm x 3mm) DFN packages.

The LT1610 is a micropower fixed frequency DC/DC converter that operates from an input voltage as low as 1V. Intended for small, low power applications, it switches at 1.7MHz, allowing the use of tiny capacitors and inductors. The device can generate 3V at 30mA from a single cell (1V) supply. An internal compensation network can be connected to the LT1610’s VC pin, eliminating two external components. No-load quiescent current of the LT1610 is 30µA, and the internal NPN power switch handles a 300mA current with a voltage drop of 300mV. The LT1610 is available in 8-lead MSOP and SO packages.

The LT ®3431 is a 500kHz monolithic buck switching regu- lator that accepts input voltages up to 60V. A high efficiency 3A, 0.1Ω switch is included on the die along with all the nec- essary oscillator, control and logic circuitry.

The LTC1703 is a dual switching regulator controller optimized for high efficiency with low input voltages. It includes two complete, on-chip, independent switching regulator controllers. Each is designed to drive a pair of external N-channel MOSFET devices in a voltage mode feedback, synchronous buck configuration. It uses a constant- frequency, true PWM design switching at 550kHz, minimiz- ing external component size and cost and optimizing load transient performance.

The LT1767 is a 1.25MHz monolithic buck switching regulator with features such as high efficiency, wide operating voltage range, and low power consumption. It uses current mode control to provide fast transient response and excellent loop stability.