Analog Devices Inc./Maxim Integrated

The LT3092 is a programmable 2-terminal current source. It requires only two resistors to set an output current between 0.5mA and 200mA. A multitude of analog techniques lend themselves to actively programming the output current. The LT3092 is stable without input and output capacitors, offering high DC and AC impedance. This feature allows operation in intrinsically safe applications.The SET pin features 1% initial accuracy and low temperature coefficient. Current regulation is better than 10ppm/V from 1.5V to 40V.The LT3092 can operate in a 2-terminal current source configuration in series with signal lines. It is ideal for driving sensors, remote supplies, and as a precision current limiter for local supplies.Internal protection circuitry includes reverse-battery and reverse-current protection, current limiting and thermal limiting. The LT3092 is offered in the 8-lead TSOT-23, 3-lead SOT-223 and 8-lead 3mm × 3mm DFN packages.Applications2-Terminal Floating Current SourceGND Referred Current SourceVariable Current SourceIn-Line LimiterIntrinsic Safety Circuits

The LT3097 is a dual, positive and negative, high-performance, low-dropout linear regulator featuring Analog Devices, Inc., ultralow noise and ultra-high power supply rejection ratio (PSRR) architecture for powering noise-sensitive applications. Each regulator delivers up to 500 mA with a typical 260 mV/235 mV (positive/negative) dropout voltage.Operating quiescent current is nominally 2.2 mA/2.35 mA (positive/negative) and drops to 0.3 μA/3 μA (positive/negative) in shutdown. The LT3097 has a wide output voltage range (0 V to 15 V, positive and 0 V to -19.5 V, negative) error amplifier that operates in unity-gain and provides virtually constant output noise, PSRR, bandwidth and load regulation, independent of the programmed output voltage.LT3097 is stable with a minimum 10 μF ceramic output capacitor for each channel. Built-in protection includes internal current limit with foldback and thermal limit with hysteresis. The positive regulator also includes reverse-battery protection and reverse-current protection. The LT3097 is available in a thermally enhanced, 22-lead 6 mm × 3 mm, Plastic dual-flat no-leads (DFN) package.APPLICATIONSBipolar very low-noise power suppliesRF power supplies: phase-locked loops, voltage-controlled oscillators, mixers, low-noise amplifiers, and power amplifiersLow-noise instrumentationHigh-speed and high-precision data convertersMedical applications: imaging and diagnosticsPrecision power suppliesPostregulator for switching supplies

The LT3120 is a high efficiency 26V monolithic buck-boost converter. Extensive feature integration and very low resistance internal power switches minimize the total solution footprint for even the most demanding applications. A proprietary 4-switch PWM architecture provides seamless low noise operation from input voltages above, equal to, or below the output voltage.External frequency programming as well as synchronization using an internal PLL enable operation over a wide switching frequency range of 400kHz to 2MHz. The wide 2.5V to 26V input range is well suited for operation from unregulated power sources including battery stacks and backup capacitors. After start-up, operation is possible with input voltages as low as 500mV.Other features include, output short-circuit protection, thermal overload protection, less than 3μA shutdown current, power good indicator, Burst Mode operation, and maximum power point control.The LT3120 is offered in thermally enhanced 28-lead 4mm × 5mm LQFN package.APPLICATIONSRF Power SupplyUSB Power DeliverySystem Backup Power Supply1-Cell to 5-Cell Lithium Battery Powered ProductsWide Input Range Power SupplyLead Acid to 12V Regulator

The LT3150 drives a low cost external N-channel MOSFET as a source follower to produce a fast transient response, very low dropout voltage linear regulator. Selection of the N-channel MOSFET RDS(ON)allows dropout voltages below 300mV for low VINto low VOUTapplications.The LT3150 includes a fixed frequency boost regulator that generates gate drive for the N-channel MOSFET. The internally compensated current mode PWM architecture combined with the 1.4MHz switching frequency permits the use of tiny, low cost capacitors and inductors.The LT3150’s transient load performance is optimized with ceramic output capacitors. A precision 1.21V reference accommodates low voltage supplies.Protection includes a high side current limit amplifier that activates a fault timer circuit. A multifunction shutdown pin provides either current limit time-out with latchoff, overvoltage protection or thermal shutdown. Independent shutdown control of the boost converter provides on/off and sequencing control of the LDO output voltage.ApplicationsMicroprocessor, ASIC and I/O SuppliesVery Low Dropout Input-to-Output ConversionLogic Termination Supplies

The LT3154 is a highly efficient, high current, buck‑boost DC/DC converter that operates from input voltages above, below or equal to the regulated output voltage. The LT3154’s advanced topology provides a continuous transfer through all operating modes. VINoperation from 1.8V to 5.5V provides flexibility for a wide variety of power sources. The output voltage is adjustable between 1.8V to 5.5V.To minimize external components the LT3154 can be configured to operate from a 2.2MHz internal oscillator. To optimize applications for highest efficiency or smallest footprint the oscillator can be programmed between 500kHz to 4MHz, or synchronized to an external clock for noise sensitive circuits.Selectable Burst Mode operation reduces quiescent current to 17μA, ensuring high efficiency across the entire load range. The VINstart-up threshold (UVLO) can be adjusted for various input sources. An internal or externally programmable soft-start limits inrush current during start-up. Other features include <1μA shutdown current, short circuit, and thermal overload protection. The LT3154 is housed in the thermally enhanced 16-lead (3mm × 3mm × 0.74mm) LQFN package.APPLICATIONSPortable Inventory TerminalsHandheld ComputersMedical and Industrial InstrumentsWireless RF TransmitterBackup Power ApplicationsBattery Powered Systems