The LTC2955 is a micropower, pushbutton on/off controller that manages system power by generating a clean enable output from the supply monitor input and the debounced pushbutton input. It features an interrupt output that notifies the system of a pushbutton or low supply event. When the system is ready, it may use the power kill input to shut off power. If the pushbutton remains pressed for more than the configurable turn-off duration, the system power is forced off.The supply input covers a wide range from 1.5V to 36V. The robust pushbutton input handles wide voltage swings of ?36V and ESD strikes to ?25kV (human body model) without latchup or damage. A low 1.2?A supply current maximizes battery run time. Separate versions are available for positive or negative enable polarities.Applications Desktop and Notebook Computers GPS Devices Portable Instruments Automotive Electronics

The LT3959 is a current mode DC/DC converter with an integrated 6A, 40V switch. It can operate over an input range of 1.6V to 40V, suitable for applications from singlecell lithium-ion battery portable electronics up to high voltage automotive and industrial power supplies. It also exhibits low shutdown quiescent current of <1μA, making it an ideal fit for battery-operated systems. Thanks to a novel FBX pin architecture, the LT3959 can be connected directly to a divider from either positive or negative output to ground. It also packs many popular features such as soft-start, input undervoltage lockout, adjustable frequency and synchronization. Demonstration circuit 1853A features LT3959 in a 300kHz boost converter, designed for 12V output from 2V to 10V input (VIN).

The LT8471 is a dual PWM DC/DC converter containing two internal 2A, 50V switches and an additional 500mA switch to facilitate step-down and inverting conversion. Each 2A channel can be independently configured as a buck, boost, SEPIC, flyback or inverting converter. Capable of generating positive and negative outputs from a single input rail, the LT8471 is ideal for many local power supply designs.The LT8471 has an adjustable oscillator, set by a resistor placed from the RT pin to ground. Additionally, the LT8471 can be synchronized to an external clock. The free running or synchronized switching frequency range of the part can be set between 100kHz and 2MHz.Additional features such as frequency foldback, soft-start, and power good are integrated. The LT8471 is available in 20-lead TSSOP and 28-Lead (4mm ? 5mm) QFN packages.Applications Dual Rail Power for Signal Chain. Buck/Buck, Buck/Boost, Boost/Boost, Boost/Invert,?Invert/Invert, Buck/Invert

The LTC3124 is a dual-phase, synchronous step-up DC/DC converter with true output disconnect and inrush current limiting capable of providing output voltages up to 15V. Dual-phase operation significantly reduces peak inductor and capacitor ripple currents, minimizing inductor and capacitor size. The 2.5A per phase current limit, along with the ability to program output voltages up to 15V make the LTC3124 well suited for a variety of demanding applications. Once started, operation will continue with inputs down to 500mV.The LTC3124 switching frequency can be programmed from 100kHz to 3MHz to optimize applications for highest efficiency or smallest solution footprint. The oscillator can be synchronized to an external clock for noise sensitive applications. Selectable Burst Mode operation reduces quiescent current to 25?A, ensuring high efficiency across the entire load range. An internal soft-start limits inrush current during start-up.Other features include a <1?A shutdown current and robust protection under short-circuit, thermal overload, and output overvoltage conditions. The LTC3124 is offered in both 16-lead DFN and thermally-enhanced TSSOP packages.Applications RF, Microwave Power Amplifiers Piezo Actuators Small DC Motors, Thermal Printers 12V Analog Rail from Battery, 5V, or Backup Capacitor

DC185A: Demo Board for the LT1370 500kHz High Efficiency 6A Switching Regulator.

The LTC6948 is a high performance, low noise, 6.39GHz phase-locked loop (PLL) with a fully integrated VCO, including a reference divider, phase-frequency detector (PFD), ultralow noise charge pump, fractional feedback divider, and VCO output divider.The fractional divider uses an advanced, 4th order ?? modulator which provides exceptionally low spurious levels. This allows wide loop bandwidths, producing extremely low integrated phase noise values.The programmable VCO output divider, with a range of 1 through 6, extends the output frequency range.Applications Wireless Basestations (LTE, WiMAX, W-CDMA, PCS) Microwave Data Links Military and Secure Radio Test and Measurement

Demonstration circuit DC1997A is a dual output synchronous buck converters featuring the LTC3838EUHF-1 (DC1997A-A) or the  LTC3838EUHF-2 (DC1997A-B). Both assemblies provide two outputs of 1.5V/20A and 1.2V/20A over an input voltage range of 4.5V to 14V at a switching frequency of 300kHz. The LTC3838-1 and LTC3838-2 provide dual differential VOUT sensing while the dual LTC3838 (plain) has differential VOUT sensing on one channel. The "-2" version has an external reference input for channel 2.

The LTC3622 is a dual 1A output, high efficiency synchronous monolithic step-down regulator capable of operating from input supplies up to 17V. The switching frequency is fixed to 1MHz or 2.25MHz with a ?50% synchronization range to an external clock. The regulator features ultralow quiescent current and high efficiency over a wide output voltage range.The step-down regulators operate from an input voltage range of 2.7V to 17V and provide an adjustable output from 0.6V to VIN while delivering up to 1A of output current. A user-selectable mode input is provided to allow the user to trade off ripple noise for light load efficiency. Burst Mode? operation provides the highest efficiency at light loads, while pulse-skipping mode provides the lowest ripple noise. The switching regulators can be synchronized to an external clock. Furthermore, fixed VOUT options are available to eliminate the external feedback resistors.? LTC3622 Options Part Name Frequency VOUT LTC3622 1.00MHz Adjustable LTC3622-2 2.25MHz Adjustable LTC3622-23/5 2.25MHZ 5V/3.3V ?Applications Battery Powered Systems Point-of-Load Supplies Portable ? Handheld Scanners

The HMC406MS8G(E) is a high efficiency GaAs InGaP Heterojunction Bipolar Transistor (HBT) MMIC Power amplifier which operates between 5 and 6 GHz. The amplifier is packaged in a low cost, surface mount 8 leaded package with an exposed base for improved RF and thermal performance. With a minimum of external components, the amplifier provides 17 dB of gain and +29 dBm of saturated power at 38% PAE from a +5V supply voltage. Vpd can be used for full power down or RF output power/current control.Applications UNII HiperLAN & 802.11a WLAN

The HMC435AMS8G(E) is a non-reflective DC to4 GHz GaAs MESFET SPDT switch in a low cost 8lead MSOP8G surface mount package with exposedground paddle. The switch is ideal for cellular/3G andWiMAX/4G applications yielding up to 60 dB isolation,low 0.8 dB insertion loss and +50 dBm input IP3. Powerhandling is excellent up through the 3.8 GHz WiMAXband with the switch offering a P1dB compression of+30 dBm. On-chip circuitry allows positive voltagecontrol of 0/+5 Volts at very low DC currents.APPLICATIONS Basestations & Repeaters Cellular/3G and WiMAX/4G Infrastructure and Access Points CATV/CMTS Test Instrumentation