Demonstration circuit 1248 is a dual monolithic buck regulator featuring the LT3509. The demo circuit is designed for 5V@700mA and 3.3V@700mA output from a 6.5V to 36V input. The input voltage can go up to 60V without damaging the part. The switching frequency can be set from 300kHz to 2.2MHz by a single external resistor, and it is synchronizable over the full range. The power switches, the compensation components and the boost diodes are all integrated into the silicon. The shutdown and soft start function is independent for each channel. The current mode control scheme creates fast transient response and good loop stability. The part has overvoltage lockout, cycle by cycle current limit and thermal shutdown. DA pin can further protect the silicon under fault conditions by sensing the diode current.

DC1249A: Demo Board for the LTC4267-3 - Power over Ethernet IEEE 802.3af PD Interface with Integrated 300kHz Switching Regulator

DC1263A: Demo Board for the LTC4558 Dual SIM/Smart Card Power Supply and Interface

Bit Digital to Analog Converter 20-PLCC (9x9)

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

The HMC327MS8G(E) is a high efficiency GaAs InGaP Heterojunction Bipolar Transistor (HBT) MMIC Power amplifier which operates between 3 and 4 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 21 dB of gain, +30 dBm of saturated power at 45% PAE from a +5V supply voltage. Power down capability is available to conserve current consumption when the amplifier is not in use.Applications Wireless Local Loop

The HMC413QS16G(E) is a high efficiency GaAs InGaP Heterojunction Bipolar Transistor (HBT) MMIC Power amplifier which operates between 1.6 and 2.2 GHz. The amplifier is packaged in a low cost, surface mount 16 leaded package with an exposed base for improved RF and thermal performance. With a minimum of external components, the amplifier provides 23 dB of gain, +29.5 dBm of saturated power at 42% PAE from a +5V supply voltage. The amplifi er can also operate with a 3.6V supply. Vpd can be used for full power down or RF output power/current control.Applications Cellular / PCS / 3G Portable & Infrastructure Wireless Local Loop

The HMC194AMS8E is a low-cost SPDT switch in an 8-lead MSOP packages for use in applications which require high isolation between two RF paths. The devices can control signals from DC to 3 GHz and have been optimized to provide extremely high isolation with minimal insertion loss in medium and low power applications. On chip circuitry allows positive voltage control operation at very low DC cur- rents with control inputs compatible with CMOS and most TTL logic families. RF1 and RF2 are reflective opens when ?OFF?.APPLICATIONS Cellular/PCS Base Stations Portable Wireless MMDS & WirelessLAN

The HMC284AMS8G & HMC284AMS8GE are low-cost SPDT switches in 8-lead grounded base MSOP packages. The design has been optimized to provide high isolation with minimal insertion loss for medium and low power applications. On-chip circuitry allows positive voltage control operation at very low DC currents with control inputs compatible with CMOS and most TTL logic families. In the ?OFF? state, RF1 and RF2 are non-reflective.APPLICATIONS Cellular/PCS Base Stations 2.4 GHz ISM 3.5 GHz Wireless Local Loop

The HMC457QS16G(E) is a high dynamic range GaAs InGaP Heterojunction Bipolar Transistor (HBT) 1 watt MMIC power amplifier operating between 1.7 and 2.2 GHz. Packaged in a miniature 16 lead QSOP plastic package, the amplifier gain is typically 27 dB from 1.7 to 2.0 GHz and 25 dB from 2.0 to 2.2 GHz. Utilizing a minimum number of external components, the amplifier output IP3 can be optimized to +45 dBm. The power control (Vpd) can be used for full power down or RF output power/ current control. The high output IP3 and PAE make the HMC457QS16G(E) ideal power amplifier for Cellular/3G base station & repeater applications.Applications CDMA & W-CDMA? GSM, GPRS & Edge? Base Stations & Repeaters

The HMC443LP4(E) is an active miniature x4 frequency multiplier utilizing InGaP GaAs HBT technology in 4x4 mm leadless surface mount package. Power output is +4 dBm typical from a 5V supply voltage and varies little vs. input power, temperature and supply voltage. Suppression of undesired fundamental and sub-harmonics is >25 dBc typical with respect to output signal level. The low additive SSB phase noise of -142 dBc/Hz at 100 kHz offset helps the user maintain good system noise performance. The HMC443LP4(E) is ideal for use in LO multiplier chains allowing reduced parts count vs. traditional approaches.APPLICATIONS Fiber Optic? Point-to-Point Radios? Military Radar

The HMC500LP3(E) is a high dynamic range Vector Modulator RFIC which is targeted for RF predistortion and feed-forward cancellation circuits, as well as RF cancellation and beam forming amplitude/phase correction circuits. The I & Q ports of the HMC500LP3(E) can be used to continuously vary the phase and amplitude of RF signals by up to 360 degrees and 40 dB respectively, while supporting a 3 dB modulation bandwidth of 150 MHz. With an input IP3 of +33 dBm and input noise floor of -152 dBm/Hz (at -10 dB maximum gain setting), the input IP3/noise floor ratio is 185 dB.APPLICATIONS Wireless Infrastructure HPA & MCPA Error Correction Pre-Distortion or Feed-Forward Linearization PCS, GSM and W-CDMA Systems Beam Forming or RF Cancellation Circuits

The HMC372LP3 & HMC372LP3E are GaAs pHEMT MMIC Low Noise Amplifiers that are ideal for GSM & CDMA cellular basestation front-end receivers operating between 700 and 1000 MHz. The amplifier has been optimized to provide 1 dB noise figure, 15 dB gain and +34 dBm output IP3 from a single supply of +5V @ 100 mA. Input and output return losses are 25 and 14 dB respectively with the LNA requiring only four external components to optimize the RF Input match, RF ground and DC bias. For applications which require improved noise figure, please see the HMC617LP3(E).Applications GSM, GPRS & EDGE CDMA & W-CDMA Private Land Mobile Radio

The HMC492LP3(E) is a low noise Divide-by-2 Static Divider utilizing InGaP GaAs HBT technology packaged in leadless 3x3 mm QFN surface mount plastic package. This device operates from DC (with a square wave input) to 18 GHz input frequency from a single +5V DC supply. The low additive SSB phase noise of -150 dBc/Hz at 100 kHz offset helps the user maintain excellent system noise performance.APPLICATIONS Point-to-Point/Multi-Point Radios VSAT Radios Fiber Optic Test Equipment Military

The HMC494LP3(E) is a low noise Divide-by-8 Static Divider utilizing InGaP GaAs HBT technology packaged in leadless 3?3 mm QFN surface mount plastic package. This device operates from DC (with a square wave input) to 18 GHz input frequency from a single +5V DC supply. The low additive SSB phase noise of -150 dBc/Hz at 100 kHz offset helps the user maintain excellent system noise performance.APPLICATIONS Point-to-Point / Multi-Point Radios? VSAT Radios? Fiber Optic? Test Equipment? Military

The HMC487LP5E is a high dynamic range GaAsPHEMT MMIC 2 Watt Power Amplifiers housedin leadless 5 x 5 mm surface mount packages.Operating from 9 to 12 GHz, the amplifier provides20 dB of gain, +33 dBm of saturated power and 20%PAE from a +7V supply voltage. Output IP3 is +36 dBmtypical. The RF I/Os are DC blocked and matched to 50Ohms for ease of use. The HMC487LP5E eliminatesthe need for wire bonding, allowing use of surfacemount manufacturing techniques.Applications Point-to-Point Radios Point-to-Multi-Point Radios Test Equipment and Sensors Military End-Use

The HMC450QS16G(E) is a high efficiency GaAs InGaP HBT Medium Power MMIC amplifier operating between 800 and 1000 MHz. The amplifier is packaged in a low cost, surface mount 16 lead package and offers the same pinout and functionality as the higher band HMC413QS16G 1.6 - 2.3 GHz PA. With a minimum of external components, the amplifier provides 26 dB of gain, +40 dBm OIP3 and +28.5 dBm of saturated power from a +5V supply voltage. The integrated power control (Vpd) can be used for full power down or RF output power/current control. The combination of high gain and high output IP3 make the HMC450QS16G(E) an ideal linear driver for Cellular, PCS & 3G applications.Applications GSM, GPRS, & Edge? CDMA & WCDMA? Base Stations & Repeaters

The HMC6380LC4B is a wideband MMIC VoltageControlled Oscillator which incorporates the resonator,negative resistance device, and varactor diode. Outputpower and phase noise performance are excellentover temperature due to the oscillator?s monolithicconstruction. The Vtune port accepts an analog tuningvoltage from 0 to +23V. The HMC6380LC4B VCOoperates from a single +5V supply, consumes only75 mA of current, and is housed in a RoHS compliantSMT package. This wideband VCO uniquely combinesthe attributes of ultra small size, low phase noise, lowpower consumption, and wide tuning range.Applications Industrial/Medical EquipmentMeasurement EquipmentSatcomMilitary Radar, EW, & ECM

The HMC549MS8GE is a GaAs pHEMT MMIC?Low Noise Amplifier that are ideal pre-amplifiers?for CATV Set Top Box, Home Gateway, and?Digital Television receiver operating between?40 and 960 MHz. This high dynamic range LNA has?been optimized to provide 3.5 dB noise figure and?+27 dBm output IP3 from a single supply of +5V @?120 mA. The outputs of this LNA are extremely well?balanced, and can be used to drive a differential input?tuner with very high input IP2 requirements. This dual?purpose LNA can also be used as an active splitter?driving two single-ended input tuners. This LNA is?housed in a RoHS compliant MSOP8G SMT package?with exposed ground paddle.Applications DTV Receivers? Multi-Tuner Set Top Boxes? PVRs & Home Gateways