Demonstration circuit 1625A is intended to demonstrate performance of the LTC4227-1/LTC4227-2/LTC4227-3/LTC4227-4 dual ideal diode and Hot Swap™ controller. Each rail has an individual ideal diode. Ideal diode outputs are connected to the load through a single Hot Swap circuit.

DC1627A-A: Demo Board for the LTC4226 Wide Operating Range Dual Hot Swap Controller.

DC1629A: Demo Board for the LTC2472 Selectable 208sps/833sps, 16-Bit ΔΣ ADCs with 10ppm/°C Max Precision Reference.

DC1638A: Demo Board for LTC5587 6 GHz RMS Power Detector with Digital Output.

Demonstration circuits 1645A-A, 1645A-B, 1645A-C and 1645A-D feature the LTM8061, a 32V, 2A μModule® Li-Ion battery charger. Operating from a 6.5V to 32V input source, the 1645A-A and 1645A-B demo circuits charge single cell Li-Ion batteries to float voltages of 4.1V or 4.2V respectively. The 1645A-C and 1645A-D demo circuits operate from a 12V to 32V input source, and charge dual cell Li-Ion battery packs to float voltages of 8.2V or 8.4V. JP1 turns the converter on or off. JP2 allows for easy selection of C/10 or timer charge termination.

Demonstration Circuit DC1658A is a 20V High Efficiency Nanopower Step-Down Regulator featuring the LTC3388-1/ LTC3388-3. The LTC3388 is an ultralow quiescent current power supply designed to regulate the output voltage by means of a nanopower high efficiency synchronous buck regulator. The input current is only 720nA typical at no load while maintaining output voltage regulation, capable of supplying 50mA of load current. The LTC3388-1/ LTC3388-3 also in-corporates an accurate undervoltage lockout feature to disable the converter and maintain a low quiescent current state when the input voltage falls below 2.3V. In regulation, the LTC3388-1/LTC3388-3 enter a sleep state in which both input and output quiescent currents are minimal. The buck converter turns on and off as needed to maintain regulation. An additional standby mode disables the buck switching while the  output is in regulation for short duration loads requiring low ripple.

The LT3579 is a PWM DC/DC converter with built-in fault protection features to aid in protecting against output shorts, input/output overvoltage, and overtemperature conditions. The part consists of a 42V master switch, and a 42V slave switch that can be tied together for a total current limit of 6A.The LT3579 is ideal for many local power supply designs. It can be easily configured in Boost, SEPIC, Inverting, or Flyback configurations, and is capable of generating 12V at 1.7A, or ?12V at 1.2A from a 5V input. In addition, the LT3579?s slave switch allows the part to be configured in high voltage, high power charge pump topologies that are very efficient and require fewer components than traditional circuits.The LT3579?s switching frequency range can be set between 200kHz and 2.5MHz. The part may be clocked internally at a frequency set by the resistor from the RT pin to ground, or it may be synchronized to an external clock. A buffered version of the clock signal is driven out of the CLKOUT pin, and may be used to synchronize other compatible switching regulator ICs to the LT3579.The LT3579 also features innovative SHDN pin circuitry that allows for slowly varying input signals and an adjustable undervoltage lockout function. Additional features such as frequency foldback and soft-start are integrated. The LT3579 is available in 20-lead TSSOP and 20-pin 4mm ? 5mm QFN packages.Applications Local Power Supply Vacuum Fluorescent Display (VFD) Bias Supplies TFT-LCD Bias Supplies Automotive Engine Control Unit (ECU) Power

Demonstration circuit 1668B-A is a PolyPhase® power supply featuring two LTM4627 high efficiency synchronous buck μModule® regulators. The DC1668B-A input voltage range is between 4.5V to 20V with a jumper programmable output voltage from 0.6V to 3.3V. The demo circuit can deliver up to 30A of load with excellent current-sharing. Current derating may be necessary under certain operating conditions.

Demonstration circuit 1675A is a high efficiency, 6-phase, synchronous buck converter with a 7V to 14V input range that utilizes two LTC3829 controllers. It can supply 120A maximum load current with a 1.5V output voltage. The LTC3829 is a feature-rich single-output 3-phase synchronous buck controller with on-chip drivers and remote output voltage sensing.

Demonstration circuit 1685A features the LTC6417, a 1.6GHz differential ADC buffer driving the LTC2209, a 16-bit 160Msps ADC. The DC1685B is supplied with a bandpass filter centered at 140MHz between the buffer and ADC. The filter center frequency can be changed to optimize performance at different analog input frequencies. Both single-ended and differential configurations are supported at the inputs. The DC1685A has been developed from the DC1281A, used to characterize LTC2209 family of ADCs. Use the DC1685A with a DC890 FastDAACS and PScope™ Software to collect time and frequency data.

Demonstration circuit 1694B is an isolated flyback converter featuring the LT3748. The demo circuit is designed for a 12V output from a 22V to 75V DC input. The output current is up to 2.5A. The part senses the isolated output voltage directly from the primary side flyback waveform during the off time of the power switch. No third winding, opto-coupler, or signal transformer is required for regulation. A minimum load of approximately 2% of maximum load is required on the output to maintain regulation.

Demonstration circuit DC1708A is a dual-output regulator focused specifically for DDR memory power applications. It is built based on the LTC3634, a high voltage dualchannel, controlled on-time monolithic synchronous buck regulator. The DC1708A has an input voltage range of 3.6V to 15V. The output voltage of the first channel, VDDQ, of the DC1708A has three fixed voltage settings: 1.5V, 1.8V and 2.5V, and is capable of delivering up to 3A of output current. The second channel, VTT, is set to regulate to half the voltage on the VDDQIN pin, which can be either the channel 1 output or an external reference voltage. It can source or sink a maximum of 3A of output current. The LTC3634 also provides a 10mA buffered output of half VDDQIN – VTTR, which is used to provide the reference voltage needed for DDR applications. With the use of a timing resistor, the DC1708A can have its operating frequency programmed from 500kHz to 4MHz. Additionally the DC1708A can be easily synchronized to an external clock, due to an internal phase-locked loop, within this same frequency range. The DC1708A VDDQ output can operate in either Burst Mode® operation or forced continuous mode. In Burst Mode operation, which is the preferred mode of low load current operation, the DC supply current is typically only 1.3mA (both channels) at no load (sleep mode), and less than 15µA in shutdown. In Burst Mode operation or continuous mode operation, the DC1708A is a very efficient circuit at high load currents: over 80% for either channel. The LTC3634 is also capable of 90° or 180° out-of-phase operation, and can allow its output to track an external voltage, either coincidentally or ratiometrically. The LTC3634 comes in a 28-pin QFN package, featuring an exposed pad on the bottom-side of the IC for better thermal performance. All of these features make the DC1708A an ideal circuit for powering DDR memory applications.

The LTC2471/LTC2473 are small, 16-bit analog-to-digital converters with an integrated precision reference and a selectable 208sps or 833sps output rate. They use a single 2.7V to 5.5V supply and communicate through an I2C Interface. The LTC2471 is single-ended with a 0V to VREF input range and the LTC2473 is differential with a ?VREF input range. Both ADCs include a 1.25V integrated reference with 2ppm/?C drift performance and 0.1% initial accuracy. The converters are available in a 12-pin DFN 3mm ? 3mm package or an MSOP-12 package. They include an integrated oscillator and perform conversions with no latency for multiplexed applications. The LTC2471/LTC2473 include a proprietary input sampling scheme that reduces the average input current several orders of magnitude when compared to conventional delta sigma converters.Following a single conversion, the LTC2471/LTC2473 automatically power down the converter and can also be configured to power down the reference. When both the ADC and reference are powered down, the supply current is reduced to 200nA.The LTC2471/LTC2473 include a user selectable 208sps or 833sps output rate and due to a large oversampling ratio (8,192 at 208sps and 2,048 at 833sps) have relaxed anti-aliasing requirements.Applications System Monitoring Environmental Monitoring Direct Temperature Measurements Instrumentation Industrial Process Control Data Acquisition Embedded ADC Upgrades

Demonstration circuit 1721B is a 14.6V, 5A battery charger and PowerPath™ manager with 6VIN to 36VIN buck-boost converter featuring the LTC4000-1/LTC3789, targeted at 4-cell LiFePO4 applications. The LTC4000-1 has an input voltage regulation loop for Maximum Power Point Control (MPPC). MPPC extracts near maximum power from high impedance sources such as solar panels, wind turbines, or fuel cells. The output of this demo board was specifically tailored for a Tenergy 10A-hour battery, P/N 30207. Other voltages can be set by changing ROFB2 and RBFB2. The desired nominal voltage can be accurately trimmed by using trim resistors R42 and R43. For example, for 14.4V battery float voltage, change ROFB2 and RBFB2 to 86.6k, and add 7.5M at R42 and R43 for greater set point accuracy. This circuit was designed to demonstrate the high levels of performance, efficiency, and small solution size attainable using these ICs in a buck-boost converter battery charger, intelligent PowerPath manager, and power supply. It operates at 400kHz and produces a regulated 5A/14.6V battery charger output as well as a system output of up to 6.25A from an input voltage range of 6V to 36V: suitable for a wide variety of portable applications including instruments, industrial equipment, power tools, and computers.

DC1722A: Demo Board for the LTC3864 60V Low IQ Step-Down DC/DC Controller with 100% Duty Cycle Capability.

Demonstration circuit 1734A features the dual channel LT8582 in boost and inverting regulator configurations. The circuit is designed to convert a 5V to 10V input source to 12V at 900mA and –12V at 590mA. To limit the temperature rise of the chip to 40°C, on the demo board with no air flow, the maximum combined output power is 15W. Additional input bulk capacitance may be needed, subject to source impedance. DC1734A is designed to survive output short circuit events.

DC1747A-A: Demo Board for LTM2882 Dual Isolated RS232 µModule Transceiver + Power.

The LTC1517-5 is a micropower charge pump DC/DC converter that produces a regulated 5V output. The input voltage range is 2.7V to 5V. Extremely low operating current (typically 6?A with no load) and low external parts count (one 0.1?F flying capacitor and two small bypass capacitors at VIN and VOUT) make the part ideally suited for small, light load battery-powered applications. The total printed circuit board area of the application circuit shown below is only 0.045in2.The part operates as a Burst Mode? switched-capacitor voltage doubler to produce a regulated output. The part has thermal shutdown capability and can survive a continuous short circuit from VOUT to GND. The device is available in a 5-pin SOT-23 package.Applications Cellular Telephones Battery-Operated Equipment Local Power Supplies Handheld Instruments PCMCIA Supplies

The LTM9011-14/LTM9010-14/LTM9009-14 are 8-channel, simultaneous sampling 14-bit A/D converters designed for digitizing high frequency, wide dynamic range signals. AC performance includes 73.1dB SNR and 88dB spurious free dynamic range (SFDR). Low power consumption per channel reduces heat in high channel count applications. Integrated bypass capacitance and flow-through pinout reduces overall board space requirements.DC specs include ?1LSB INL (typ), ?0.3LSB DNL (typ) and no missing codes over temperature. The transition noise is a low 1.2LSBRMS.The digital outputs are serial LVDS to minimize the number of data lines. Each channel outputs two bits at a time (2-lane mode). At lower sampling rates there is a one bit per channel option (1-lane mode).The ENC+ and ENC? inputs may be driven differentially or single-ended with a sine wave, PECL, LVDS, TTL, or CMOS inputs. An internal clock duty cycle stabilizer allows high performance at full speed for a wide range of clock duty cycles.Applications Communications Cellular Base Stations Software Defined Radios Portable Medical Imaging Multichannel Data Acquisition Nondestructive Testing

DC1751A-D: Demo Board for the LTM9008-14 14-Bit, 65Msps Low Power Octal ADCs.