DC290A-B: Demo Board for the LTC1878 High Efficiency Monolithic Synchronous Step-Down Regulator.

The LTC3336 is a compact high efficiency nanopower hysteretic buck DC/DC which can deliver up to 250mA of output current from a 2.5V to 15V input. Input quiescent current is typically 80nA with the output in regulation at no load for output voltages less than 2.4V; this number is reduced further for higher output voltages at which internal circuits can be boot-strapped from the output. Performance specifications are ideal for primary (i.e., non-rechargeable) battery powered applications: low IQ plus the ability to set the peak current to a level matched to the battery?s maximum capacity point.The peak input currents of 10mA, 30mA, 100mA, and 300mA are pin selectable as well as the output voltages of 1.2V, 1.5V, 1.6V, 1.8V, 2.0V, 2.4V, 2.5V, 2.8V, 3.0V, 3.2V, 3.3V, 3.6V, 3.7V, 4.1V, 4.2V, and 5.0V.The LTC3336 is offered in a compact 12-lead 2mm ? 2mm LQFN package.APPLICATIONS Low Power Primary Battery Powered Systems (e.g., 1? ? 3? Li-Ion Primary, 3? ? 8? AAA) Remote Industrial Sensors (e.g., Meters, Alarms) Asset Trackers Electronic Door Locks Keep-Alive Supplies/Battery Backup SmartMesh? Applications

The LT3935 is a monolithic, synchronous, step-down DC/DC converter that utilizes fixed-frequency, peak current control and provides PWM dimming for a string of LEDs. The LED current is programmed by an analog voltage or the duty cycle of pulses at the CTRL pin. An output voltage limit can be set with a resistor divider to the FB pin.The switching frequency is programmable from 200kHz to 2MHz by an external resistor at the RT pin or by an external clock at the SYNC/SPRD pin. With the optional spread spectrum frequency modulation enabled, the frequency varies from 100% to 125% to reduce EMI.Additional features include an LED current monitor, an accurate EN/UVLO pin threshold, open-drain fault reporting for open-circuit and short-circuit load conditions, and thermal shutdown. The LT3935 utilizes proprietary Silent?Switcher technology for very low EMI.APPLICATIONSAutomotive LightingIndustrial and General Purpose Lighting

Demonstration circuit 2995A is a buck regulator featuring the LTC7891. The DC2995A operates from a 36V to 72V input voltage range and generates a 12V, 20A output. The LTC7891 has a precision voltage reference which can generate an output voltage with 2% tolerance over the full operating conditions. The 500kHz switching frequency operation results in a small and efficient circuit. The converter achieves over 96% efficiency with 20A load. The demonstration circuit can be easily modified to regulate output voltages from 0.8V to 60V. The DC2995A provides a high performance cost-effective solution for generating a 12V output. The LTC7891 data sheet gives a complete description of this part, its operation and application information and must be read in conjunction with the demo manual.

Demonstration circuit 3099A is a 42V, 5A synchronous step-down Silent Switcher® with spread spectrum frequency modulation featuring the LT8640A. The demo board is designed for 5V output from a 5.7V to 42V input. Meanwhile the LT8640A can operate down to 3.4V inputs. The wide input range allows a variety of input sources, such as automotive batteries and industrial supplies. The LT8640A is a compact, ultralow emission, high efficiency, and high speed synchronous monolithic stepdown switching regulator. The integrated power switches and inclusion of all necessary circuitry reduce the components count and solution size. Special Silent Switcher architecture minimizes EMI emissions. Selectable spread spectrum mode can further improve EMI performance. Ultralow 2.5μA quiescent current in Burst Mode® operation achieves high efficiency at very light loads. Fast minimum on-time of 30ns enables high VIN to low VOUT conversion at high frequency. The LT8640A switching frequency can be programmed either via oscillator resistor or external clock over a 200kHz to 3MHz range. The default frequency of demo circuit 3099A is 2MHz. The LT8640A SYNC/MODE pin on the demo board is grounded (JP1 at BURST position) by default for low ripple Burst Mode operation. Spread spectrum mode and forced continuous mode can be selected respectively by moving JP1 shunt. To synchronize to an external clock, move JP1 to FCM/SYNC and apply the external clock to the SYNC terminal. The LT8640A data sheet gives a complete description of the part, operation, and application information. The data sheet must be read in conjunction with this demo manual for demo circuit 3099A. The LT8640A is assembled in a 3mm × 4mm plastic QFN package with exposed pad for low thermal resistance. The layout recommendations for low EMI operation and maximum thermal performance are available in the data sheet section Low EMI PCB Layout and Thermal Considerations and Peak Output Current.

The HMC554ALC3B is a general-purpose, double balanced mixer in a leadless RoHS compliant leadless chip carrier (LCC) package that can be used as an upconverter or downconverter between 10 GHz and 20 GHz. This mixer is fabricated in a gallium arsenide (GaAs) metal semiconductor field effect transistor (MESFET) process and requires no external?components or matching circuitry. The HMC554ALC3B provides excellent local oscillator (LO) to RF and LO to intermediate frequency (IF) isolation due to optimized balun structures. The RoHS compliant HMC554ALC3B eliminates the need for wire bonding and is compatible with high volume surface-mount manufacturing techniques.Applications Microwave and very small aperture terminal (VSAT) radios Test equipment Military electronic warfare (EW); electronic countermeasure (ECM); and command, control, communications and intelligence (C3I)

The HMC798ALC4 is a 24 GHz to 34 GHz subharmonically pumped (?2) MMIC mixer with an integrated LO amplifier housed in a leadless, RoHS compliant LCC package. The HMC798ALC4 can be used as an upconverter or downconverter between 24 GHz and 34 GHz. The 2 ? LO to radio frequency (RF) isolation is typically 30 dB in a 24 GHz to 30 GHz frequency range and 36 dB in a 30 GHz to 34 GHz frequency range, eliminating the need for additional filtering. The LO amplifier is single bias at a 5 V dc with a typical 4 dBm LO drive level requirement The HMC798ALC4 eliminates the need for wire bonding, allowing use of surface-mount technology (SMT) manufacturing techniques.Applications Microwave and very small aperture terminal (VSAT) radios Test equipment Point to point radios Satellite communications (SATCOM) Military electronic warfare (EW), electronic countermeasure (ECM), and command, control, communications and intelligence (C3I)

The HMC815B is a compact gallium arsenide (GaAs),pseudomorphic high electron mobility transistor (pHEMT),monolithic microwave integrated circuit (MMIC) upconverterin a RoHS compliant package that operates from 21 GHz to27 GHz. This device provides a small signal conversion gain of12 dB and a sideband rejection of 20 dBc. The HMC815Butilizes a driver amplifier proceeded by an in phase/quadrature(I/Q) mixer where the LO is driven by an active 2? multiplier.IF1 and IF2 mixer inputs are provided, and an external 90?hybrid is needed to select the required sideband. The I/Q mixertopology reduces the need for filtering of unwanted sideband.The HMC815B is a smaller alternative to hybrid style singlesideband (SSB) downconverter assemblies, and it eliminates theneed for wire bonding by allowing the use of surface-mountmanufacturing techniques.The HMC815B is available in 4.90 mm ? 4.90 mm, 32-terminalceramic LCC package and operates over the ?40?C to +85?Ctemperature range. An evaluation board for the HMC815B isalso available upon request.Applications Point to point and point to multipoint radios Military radars, electronic warfare, and electronic intelligence Satellite communications Sensors

The HMC891ALP5E is a monolithic microwave integrated circuit (MMIC) band-pass filter that features a user-selectablepass band frequency. The 3 dB filter bandwidth is approximately 9% and the 20 dB filter bandwidth is approximately 23%. Thecenter frequency (fCENTER) can be varied between 1.95 GHz and 3.4 GHz by applying an analog tune voltage between 0 V and 14 V.This tunable filter can be used as a smaller alternative to physically large switched filter banks and cavity tuned filters.The HMC891ALP5E has excellent microphonics due to the monolithic design, and provides a dynamically adjustablesolution in advanced communications applications.ApplicationsTesting and measurement equipmentMilitary radar and electronic warfare/electronic counter measure (ECM)Satellite communication and spaceIndustrial and medical equipment

The HMC618ALP3E is a GaAs pHEMT MMIC Low Noise Amplifier that is ideal for Cellular/3G and LTE/WiMAX/4G basestation front-end receivers operating between 1.2 - 2.2 GHz. The amplifier has been optimized to provide 0.75 dB noise figure, 19 dB gain and +36 dBm output IP3 from a single supply of +5V. Input and output return losses are excellent and the LNA requires minimal external matching and bias decoupling components. The HMC618ALP3E shares the same package and pinout with the HMC617LP3E 0.55 - 1.2 GHz LNA. The HMC618ALP3E can be biased with +3V to +5V and features an externally adjustable supply current which allows the designer to tailor the linearity performance of the LNA for each application. The HMC618ALP3E offers improved noise figure versus the previously released HMC375LP3(E) and the HMC382LP3(E).Applications Cellular/3G and LTE/WiMAX/4G BTS & Infrastructure Repeaters and Femto Cells Public Safety Radio