Demonstration circuit 534 is a fast transient response, very low dropout linear regulator featuring the 4A output current LT3150 linear regulator controller. The DC534 has an input voltage range of 1.1V to 10V and generates a jumper-selectable output voltage of 1.2V, 1.5V or 1.8V. With the LT3150 driving external N-channel MOSFETs as source followers, the DC534 can produce very fast transient response. The proper selection of the Rds(on) of the MOSFETs allows dropout voltages below 300 mV. These capabilities, plus its ability to maintain stable operation with ceramic output capacitors, make the DC534 voltage regulator ideally suited for low VIN-to-VOUT applications, such as microprocessor/microcontroller/FPGA power supplies.

DC536A-B: Demo Board for the LTC4211 Hot Swap Controller with Multifunction Current Control.

Demonstration circuit 536B is a hot swap controller with multifunction current control featuring the LTC4211. The DC536B-A is configured to operate with up to 7A load and DC536B-B up to 20A load.

The DC539B demo board is used to evaluate the LTC5509, RF power detector with integrated output buffer and voltage reference. The LTC5509 converts an RF input signal at pin 6 (RF) to a DC voltage at pin 3 (VOUT). The RF input frequency range is 300 MHz to 3000 MHz. Maximum input power is 8 dBm. The output voltage at VOUT will start at an initial DC value of typically 250mV. When the RF signal is applied the output voltage will increase.

Demonstration circuit 542 is a dual output, dual phase synchronous step-down controller, featuring the LTC3728EG. Output #1 can be configured for either 5.0V or 3.3V and output #2 can be configured for either 3.3V or 2.5V. The maximum load for both rails is 12A. The input voltage range of the DC542 is 8V to 24V. The DC542 also contains a footprint for a 5.5V boost converter bias supply whose output is connected to EXTVCC. See the “Optional Bias Supply” section for more details.

DC551A-B: Demo Board for the LTC4002-4.2 Standalone Li-Ion Switch Mode Battery Charger.

Demonstration circuit 559 is a high efficiency synchronous boost DC/DC converter with output disconnect, inrush current limiting and soft-start functions featuring the LTC3429. DC559A-A uses the LTC3429 Burst Mode capable device; DC559A-B uses the continuous switching LTC3429B (Burst Mode disabled). The demo board is capable of supplying 3.3V@90mA from a single AA cell input or 3.3V@250mA from a 2-cell input. The input range is from 1V to 3.3V.

DC562A-B: Demo Board for the LT1725 General Purpose Isolated Flyback Controller.

The LTC6910 family are low noise digitally programmable gain amplifiers (PGAs) that are easy to use and occupy very little PC board space. The inverting gain is adjustable using a 3-bit digital input to select gains of 0, 1, 2, 5, 10, 20, 50 and 100V/V in the LTC6910-1; 0, 1, 2, 4, 8, 16, 32 and 64V/V in the LTC6910-2; and 0, 1, 2, 3, 4, 5,6 and 7V/V in the LTC6910-3.The LTC6910-Xs are inverting amplifiers with rail-to-rail output. When operated with unity gain, they will also process rail-to-rail input signals. A half-supply reference generated internally at the AGND pin supports single power supply applications. Operating from single or split supplies from 2.7V to 10.5V, the LTC6910-X family is offered in an 8-lead SOT-23 package.Applications Data Acquisition Systems Dynamic Gain Changing Automatic Ranging Circuits Automatic Gain Control

DC566A-C: Demo Board for the LTC6910 Digitally Controlled Programmable Gain Amplifiers in SOT-23.

The LTC2414/LTC2418 are 8-/16-channel (4-/8-differential) micropower 24-bit ?? analog-to-digital converters. They operate from 2.7V to 5.5V and include an integrated oscillator, 2ppm INL and 0.2ppm RMS noise. They use delta-sigma technology and provide single cycle settling time for multiplexed applications. Through a single pin, the LTC2414/LTC2418 can be configured for better than 110dB differential mode rejection at 50Hz or 60Hz ?2%, or they can be driven by an external oscillator for a user-defined rejection frequency. The internal oscillator requires no external frequency setting components.The LTC2414/LTC2418 accept any external differential reference voltage from 0.1V to VCC for flexible ratiometric and remote sensing measurement applications. They can be configured to take 4/8 differential channels or 8/16 single-ended channels. The full-scale bipolar input range is from -5VREF to 0.5VREF. The reference common mode voltage, VREFCM, and the input common mode voltage, VINCM, may be independently set within GND to VCC. The DC common mode input rejection is better than 140dB.The LTC2414/LTC2418 communicate through a flexible 4-wire digital interface that is compatible with SPI and MICROWIRE protocols.Applications Direct Sensor Digitizer Weight Scales Direct Temperature Measurement Gas Analyzers Strain Gauge Transducers Instrumentation Data Acquisition Industrial Process Control

DC573A: Demo Board for the LTC2400 24-Bit µPower No Latency Delta-Sigma ADC in SO-8.

The LT6202/LT6203/LT6204 are single/dual/quad low noise, rail-to-rail input and output unity gain stable op amps that feature 1.9nV/?Hz noise voltage and draw only 2.5mA of supply current per amplifier. These amplifiers combine very low noise and supply current with a 100MHz gain bandwidth product, a 25V/?s slew rate, and are optimized for low supply signal conditioning systems.These amplifiers maintain their performance for supplies from 2.5V to 12.6V and are specified at 3V, 5V and ?5V supplies. Harmonic distortion is less than ? 80dBc at 1MHz making these amplifiers suitable in low power data acquisition systems.The LT6202 is available in the 5-pin TSOT-23 and the 8-pin SO, while the LT6203 comes in 8-pin SO and MSOP packages with standard op amp pinouts. For compact layouts the LT6203 is also available in a tiny fine line leadless package (DFN), while the quad LT6204 is available in the 16-pin SSOP and 14-pin SO packages. These devices can be used as plug-in replacements for many op amps to improve input/output range and noise performance.Applications Low Noise, Low Power Signal Processing Active Filters Rail-to-Rail Buffer Amplifiers Driving A/D Converters DSL Receivers Battery Powered/Battery Backed Equipment

DC606A: Demo Board for the LTC4056-4.2 Linear Li-Ion Charger with Termination in ThinSOT.

Demonstration Circuit 616 is a synchronous, 4-phase boost converter using the LTC3425. It is capable of operating below 1V input. DC616A is set for 3.3V output. DC616B is set for 5V output. On each demo board, the left circuit gives higher efficiency and current rating; while the right circuit has smaller size and lower cost. The switching frequency is set at 1MHz per phase, minimizing inductor and capacitor size. A single resistor at RT pin sets the frequency. If desired, the LTC3425 can be synchronized to an external clock.

DC626A-A: Demo Board for the LTC1569-6 Linear Phase, DC Accurate, Low Power, 10th Order Low Pass Filter.

The LTC5100 is a 3.2Gbps VCSEL driver offering an unprecedented level of integration and high speed performance. The part incorporates a full range of features to ensure consistently outstanding eye diagrams. The data inputs are AC coupled, eliminating the need for external capacitors. The LTC5100 has a precisely controlled 50? output that is DC coupled to the laser, allowing arbitrary placement of the IC. No coupling capacitors, ferrite beads or external transistors are needed, simplifying layout, reducing board area and the risk of signal corruption. The unique output stage of the LTC5100 confines the modulation current to the ground system, isolating the high speed signal from the power supply to minimize RFI.The LTC5100 supports fully automated production with its extensive monitoring and control features. Integrated 10-bit DACs eliminate the need for external potentiometers. An onboard 10-bit ADC provides the laser current and voltage, as well as monitor diode current and temperature. Status information is available from the I2C serial interface for feedback and statistical process control.An internal digital controller compensates laser temperature drift and provides extensive laser safety features.Applications Gigabit Ethernet and Fibre Channel Transceivers SFF and SFP Transceiver Modules Proprietary Fiber Optic Links

The LTC3408 is a high efficiency monolithic synchronous buck regulator optimized for WCDMA power amplifier applications. The output voltage can be dynamically programmed from 0.3V to 3.5V. At VOUT > 3.6V an internal 0.08? bypass P-channel MOSFET connects VOUT directly to VIN, eliminating power loss through the inductor.The input voltage range is 2.5V to 5V making the LTC3408 ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems.Switching frequency is internally set at 1.5MHz, allowing the use of small surface mount inductors and capacitors. The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode.The LTC3408 is available in a low profile (0.75mm) 8-lead 3mm ? 3mm DFN package.Applications WCDMA Cell Phone Power Amplifiers Wireless Modems

DC646A: Demo Board for the LT3420 Photoflash Capacitor Chargers with Automatic Refresh.

DC661A-A: Demo Board for the LT3468 Photoflash Capacitor Chargers in ThinSOT.