Demonstration circuit 1271 is a small foot print, high efficiency synchronous buck converter with 4.5V to 14V input range. It can supply 15A maximum load current at 1.5V output. The demo board features the LTC3854EDDB controller. The controller features a 400kHz constant frequency current mode architecture and allows RSENSE or DCR inductor current sensing. The demo board is configured using RSENSE.

DC1276B: Demo Board for LTC3558 - Linear USB Battery Charger with Buck and Buck-Boost Regulators

The LT3471 dual switching regulator combines two 42V, 1.3A switches with error amplifiers that can sense to ground providing boost and inverting capability. The low VCESAT bipolar switches enable the device to deliver high current outputs in a small footprint. The LT3471 switches at 1.2MHz, allowing the use of tiny, low cost and low profile inductors and capacitors. High inrush current at start-up is eliminated using the programmable soft-start function, where an external RC sets the current ramp rate. A constant frequency current mode PWM architecture results in low, predictable output noise that is easy to filter.The LT3471 switches are rated at 42V, making the device ideal for boost converters up to ?40V as well as SEPIC and flyback designs. Each channel can generate 5V at up to 630mA from a 3.3V supply, or 5V at 510mA from four alkaline cells in a SEPIC design. The device can be configured as two boosts, a boost and inverter or two inverters.The LT3471 is available in a low profile (0.75mm) 10-lead 3mm ? 3mm DFN package.Applications Organic LED Power Supply Digital Cameras White LED Power Supply Cellular Phones Medical Diagnostic Equipment Local ?5V or ?12V Supply TFT-LCD Bias Supply xDSL Power Supply

Demonstration circuit 1288 is a Triple Boost or Buck-Boost LED Driver featuring the LT3496EUFD (for evaluating an LT3496 buck mode LED driver, use the demonstration circuit 986). The LT3496 is a triple output DC/DC converter designed to operate as current sources for driving high current LEDs. The board can be configured as either a buck-boost (default) or boost solution. The current for each output is set at 200mA in either mode. The three LEDs are included in the demo board assembly. The operating power input voltage (PVIN) range is 8V to 16V. The buck-boost circuit can tolerate an input voltage up to 40V when the LED string is on the high side. The part shuts down when the overvoltage threshold is reached. For a typical application with 5 LEDs totaling 16V of LED voltage, the circuit will operate until PVIN reaches 22V if the overvoltage protection is set to 38V.

The LTC3878 is a synchronous step-down switching DC/DC controller optimized for high switching frequency and fast transient response. The constant on-time valley current mode architecture allows for a wide input range, including very low duty factor operation. No external sense resistor or slope compensation is required. The LTC3878 is pin compatible with the LTC1778 in applications that do not use EXTVCC while offering better efficiency. Consult with the factory to verify compatibility. Operating frequency is set by an external resistor and compensated for variations in VIN to offer excellent line stability. Discontinuous mode operation provides high efficiency during light load conditions. A forced continuous control pin allows the user to reduce noise and RF interference. Safety features include output overvoltage protection and programmable current limit with foldback. Soft-start capability for supply sequencing is accomplished through an external timing capacitor. The current limit is user programmable. The LTC3878 allows operation from 4V to 38V at the input and from 0.8V to 90% VIN at the output. The LTC3878 is available in a small 16-pin narrow SSOP package.Applications Distributed Power Systems Embedded Computing Communications Infrastructure

DC1313A: Demo Board for LT1912 36V, 2A, 500kHz Step-Down Switching Regulator.

DC1317A-D: Demo Board for LT1952 Single Switch Synchronous Forward Controller.

DC1331D: Demo Board for LTC6802-1 - Multicell Battery Stack Monitor

The HMC6981 is a four-stage GaAs pHEMT MMIC Power Amplifier with an integrated temperature compensated on-chip Power Detector, which operates between 15 and 20 GHz. The amplifier provides 26 dB of gain, +34.5 dBm of saturated output power, and 25% PAE from a +6V supply. With an excellent output IP3 of +43.5 dBm, the HMC6981 is ideal for linear applications such as high capacity point-to-point or point-to-multi-point radios or SATCOM applications demanding +34.5 dBm of efficient saturated output power. The HMC6981 is housed in a ceramic 6 x 6 mm high frequency air cavity package which exhibits low thermal resistance and is compatible with high volume surface mount manufacturing techniques. The RF I/Os are internally matched to 50 Ohms.Applications Point-to-Point Radios Point-to-Multi-Point Radios SATCOM

The HMC394LP4(E) is a low noise GaAs HBT programmable 5-bit counter in 4x4 mm leadless surface mount package. This device allows continuous division from N= 2 to 32 at input frequencies up to 2.2 GHz. The output voltage swing is 800 mV with a duty cycle inversely proportional to N. The low additive SSB phase noise of -153 dBc/Hz at 100 KHz offset makes this counter an excellent choice for low noise synthesizer applications.APPLICATIONSProgrammable divider for offset synthesizer and variable divide by N applications: Satellite Communication Systems Point-to-Point and Point-to-Multi-Point Radios LMDS SONET