Demonstration circuits 2229A-A and 2229A-B feature the LTC3877 in two high output current, high efficiency, VID programmed step-down converters with sub-mΩ DCR sensing. For both converters, the input voltage range is 6V to 14V and the switching frequency is 400kHz.

The HMC881A is a monolithic microwave integrated circuit (MMIC) low-pass filter that features a user-selectable cutoff frequency. The cutoff frequency can be varied from 2.4 GHz to 4 GHz by applying a single analog tuning voltage between 0 V and 14 V. This low-pass filter provides a low 3 dB insertion loss, 16.5 dB return loss, and 1.35 ? f3dB stopband attenuation of >20 dB. This tunable filter can be used as a much smaller alternative to physically large switched filter banks and cavity tuned filters. The HMC881A has excellent microphonics due to the monolithic design, and provides a dynamically adjustable solution in advanced communications applications. The low-pass tunable filter is packaged in a RoHS compliant 5 mm ? 5 mm LFCSP package.Applications Testing and measurement equipment Military radar and electronic warfare/electronic countermeasures (ECMs) Satellite communication and space Industrial and medical equipment

The LTC3458L is a high efficiency, current mode, fixed frequency, step up DC/DC converter with true output disconnect and inrush current limiting. The LTC3458L is rated for up to 6V output and includes a 0.2? N-channel MOSFET switch and a 0.3? P-channel MOSFET synchronous rectifier. The LTC3458L is well suited for battery powered applications and includes programmable output voltage, switching frequency and loop compensation. The oscillator frequency can be set up to 1.5MHz or synchronized to an external clock.Quiescent current is only 12?A during Burst Mode operation maximizing battery life in portable applications. The Burst Mode current threshold, peak current limit, and softstart are externally programmable. Other features include <1?A shutdown current, antiringing control, and thermal limit. The LTC3458L is available in a low profile (0.75mm), 4mm ? 3mm 12-pin DFN package.Protected by U.S. Patents including 5481178, 6304066, 6580258, 5511131, 6498466 Vout Range Switch Current LTC3458 2.0V to 7.5V 1.4A LTC3458L 2.0V to 6.0V 1.7A Applications Point-of-Load Regulators USB VBUS Power Portable GPS MP3 Players

The Analog Devices, Inc., amplifier mezzanine card (AMC) analog-to-digital converter (ADC) driver evaluates the performance of amplifiers in 8-lead, single and dual SOIC, 6-lead single SOT23, 8-lead dual MSOP, and 16-lead LFCSP packages. This add on board can be inserted on ADC evaluation boards using its 7-pin header. Figure 1 shows the AMC mounted on an Analog Devices, Inc., ADC evaluation board. The AMC can support any of Analog Devices operational amplifiers and ADC drivers in different packages. The user can configure the ADC driver as a Sallen-Key low-pass, high-pass, or band-pass filter, as a multiple feedback low-pass, high-pass, or band-pass filter, or as an inverting and noninverting operational amplifier. The user can also configure the AMC to drive a single-ended, fully differential, or a single-ended signal to a differential ADC. Optimized power and ground planes ensure low noise and high speed operation. Component placement and power supply bypassing are optimized for maximum circuit flexibility and performance. The AMC evaluation board accepts 0402 or 0603 surface mount technology (SMT) components, 1206 bypass capacitors, and 2.54 mm headers. All components are placed on the primary side. No components are placed on the secondary side.

Demonstration Circuit 658 is a complete power management system using the LTC3456 for portable applications powered by a wall adapter, a USB port or a 2-cell alkaline battery, in that order of priority. DC658 provides three outputs: a 1.8V, 200mA core supply, a 3.3V, 150mA main supply, and a 3.3V, 50mA Hot Swap supply. All outputs are discharged to ground during shutdown. The synchronous buck (1.8V output) and the second converter (which operates as a buck or a boost depending on the power source, and provides 3.3V @ 150mA and 3.3V @ 50mA outputs) accept a 2V to 3.2V battery input or USB/Wall adapter input.

The LTC3882 is a dual, PolyPhase DC/DC synchronous step-down switching regulator controller with PMBus compliant serial interface. It uses a constant frequency, leading-edge modulation, voltage mode architecture for excellent transient response and output regulation. Each PWM channel can produce output voltages from 0.5V to 5.25V using a wide range of 3.3V compatible power stages, including power blocks, DrMOS or discrete FET drivers. Up to four LTC3882s can operate in parallel for 2-, 3-, 4-, 6- or 8-phase operation.LTC3882 system configuration and monitoring is supported by the LTpowerPlay? software tool. The device?s serial interface can be used to read back input voltage, output voltage and current, temperature and fault status. A wide range of operating parameters can be set via the digital interface or stored in internal EEPROM for use at power up. Switching frequency and phase, output voltage and device address can also be programmed using external configuration resistors. PWM?Enable Output TG/BG Control HW?Write Protect Dedicated PGOOD Differential Vout Sense LTC3882 Yes Yes Yes No? VOUT0 Only LTC3882-1 ?No No No Yes VOUT0 & VOUT1 Applications High Current Distributed Power Systems Servers, Network and Storage Equipment Intelligent Energy Efficient Power Regulation Industrial/Telecom/ATE Systems

The AD5674/AD5674R/AD5679/AD5679R are low power,?16-channel, 12-/16-bit, buffered voltage output, digital-to-analog converters (DACs) that include a 2.5 V, 2 ppm/?C internal reference (enabled by default), and a gain select pin, resulting in a full-scale output of 2.5 V (gain = 1) or 5 V (gain = 2). The?devices operate from a single, 2.7 V to 5.5 V supply range and?are guaranteed monotonic by design. The AD5674/AD5674R/AD5679/AD5679R are available in a 28-lead lead frame chip scale package (LFCSP) and incorporate a power-on reset (POR) circuit that ensures that the DAC outputs power up to and remains at zero-scale or midscale until a valid write. The AD5674/AD5674R/AD5679/AD5679R contain a power-down mode that reduces the current?consumption to 2 ?A typical.Product Highlights High channel density: 16 channels in 4 mm ? 4 mm?LFCSP. High relative accuracy (integral nonlinearity (INL)) ?4 LSB maximum. Low drift, 2.5 V, on-chip reference.Applications Optical transceivers Base station power amplifiers Process control (programmable logic controller (PLC) input/output cards) Industrial automation Data acquisition systems

The ADCMP580/ADCMP581/ADCMP582 are ultrafast voltagecomparators fabricated on the Analog Devices, Inc. proprietaryXFCB3 Silicon Germanium (SiGe) bipolar process. TheADCMP580 features CML output drivers, the ADCMP581features reduced swing ECL (negative ECL) output drivers, andthe ADCMP582 features reduced swing PECL (positive ECL)output drivers.All three comparators offer 180 ps propagation delay and 100 psminimum pulse width for 10 Gbps operation with 200 fs randomjitter (RJ). Overdrive and slew rate dispersion are typically lessthan 15 ps.The ?5 V power supplies enable a wide ?2 V to +3 V inputrange with logic levels referenced to the CML/NECL/PECLoutputs. The inputs have 50 ? on-chip termination resistorswith the optional capability to be left open (on an individualpin basis) for applications requiring high impedance input. The CML output stage is designed to directly drive 400 mV into50 ? transmission lines terminated to ground. The NECL outputstages are designed to directly drive 400 mV into 50 ? terminatedto ?2 V. The PECL output stages are designed to directly drive400 mV into 50 ? terminated to VCCO ? 2 V. High speed latchand programmable hysteresis are also provided. The differentiallatch input controls are also 50 ? terminated to an independentVTT pin to interface to either CML or ECL or to PECL logic.The ADCMP580/ADCMP581/ADCMP582 are available in a16-lead LFCSP.Applications Automatic test equipment (ATE) High speed instrumentation Pulse spectroscopy Medical imaging and diagnostics High speed line receivers Threshold detection Peak and zero-crossing detectors High speed trigger circuitry Clock and data signal restoration

DC2027A-B: Demo Board for the LTC4364 Surge Stopper with Ideal Diode.

The LTM8053 is a 40VIN, 3.5A continuous, 6A peak step-down ?Module? (power module) regulator. Included in the package are the switching controller, power switches, inductor, and all support components. Operating over an input voltage range of 3.4V to 40V, the LTM8053 / LTM8053- 1 supports an output voltage range of 0.97V to 15V and a switching frequency range of 200kHz to 3MHz, each set by a single resistor. Only the input and output filter capacitors are needed to finish the design. The LTM8053-1 can operate in forced continuous mode.The low profile package enables utilization of unused space on the bottom of PC boards for high density point of load regulation. The LTM8053 / LTM8053-1 is packaged in a thermally enhanced, compact over-molded ball grid array (BGA) package suitable for automated assembly by standard surface mount equipment. The LTM8053 / LTM8053-1 is RoHS compliant.APPLICATIONS Automotive Battery Regulation Power for Portable Products Distributed Supply Regulation Industrial Supplies Wall Transformer Regulation