The LT3066 series are micropower, low noise, low dropout voltage (LDO) linear regulators that operate over a 1.8V to 45V input voltage range. The devices supply 500mA of output current with a typical dropout voltage of 300mV. A single external capacitor provides programmable low noise reference performance and output soft-start functionality.A single external resistor programs the LT3066?s current limit, accurate to ?10% over a wide input voltage and temperature range. A PWRGD flag indicates output regulation.The LT3066 features an NMOS pull-down that discharges the output if SHDN or IN is driven low.The LT3066 optimizes stability and transient response with low ESR ceramic capacitors, requiring a minimum of 3.3?F. Internal protection circuitry includes current limiting with foldback, thermal limiting, reverse battery protection, reverse current protection and reverse output protection.The LT3066 is available in fixed output voltages of 3.3V and 5V, and as an adjustable device with an output voltage range from 0.6V to 19V. The device is offered in the thermally-enhanced 12-lead 4mm ? 3mm DFN and MSOP packages.Applications Battery-Powered Systems Automotive Power Supplies Industrial Power Supplies Avionic Power Supplies Portable Instruments

The LT8315 is a high voltage flyback converter with integrated 630V/300mA switch. No opto-isolator is needed for regulation. The device samples the output voltage from the isolated flyback waveform appearing across a third winding on the transformer. Quasi-resonant boundary mode operation improves load regulation, reduces transformer size, and maintains high efficiency.At start-up, the LT8315 charges its INTVCC capacitor via a current source attached to the DRAIN pin. During normal operation, the current source turns off and the device draws its power from a third winding on the transformer.The LT8315 operates from a wide range of input supply voltages and can deliver up to 15W of power. It is available in a thermally enhanced 20-pin TSSOP package with four pins removed for high-voltage spacing.Applications Isolated Telecom, Automotive, Industrial, Medical Power Supplies Isolated Off Line Housekeeping Power Supplies Electric Vehicles and Battery Stacks

The LT3045 is a high performance low dropout linear regulator featuring LTC?s ultralow noise and ultrahigh PSRR architecture for powering noise sensitive applications. Designed as a precision current reference followed by a high performance voltage buffer, the LT3045 can be easily paralleled to further reduce noise, increase output current and spread heat on the PCB.The device supplies 500mA at a typical 260mV dropout voltage. Operating quiescent current is nominally 2.2mA and drops to <<1?A in shutdown. The LT3045?s wide output voltage range (0V to 15V) while maintaining unity-gain operation provides virtually constant output noise, PSRR, bandwidth and load regulation, independent of the programmed output voltage. Additionally, the regulator features programmable current limit, fast start-up capability and programmable power good to indicate output voltage regulation.The LT3045 is stable with a minimum 10?F ceramic output capacitor. Built-in protection includes reverse-battery protection, reverse-current protection, internal current limit with foldback and thermal limit with hysteresis. The LT3045 is available in thermally enhanced 12-Lead MSOP and 10-Lead 3mm ? 3mm DFN packages.The LT3045-EP supports defense and aerospace applications (AQEC) VIOC Function LT3045-1 Yes LT3045 No APPLICATIONS RF Power Supplies: PLLs, VCOs, Mixers, LNAs, PAs Very Low Noise Instrumentation High Speed/High Precision Data Converters Medical Applications: Imaging, Diagnostics Precision Power Supplies Post-Regulator for Switching Supplies

The LT1997-1 is a difference amplifier that can be used to amplify small differential signals while rejecting large common mode signals making it an ideal choice for current sense applications. It combines a precision operational amplifier with highly-matched resistors to form a one-chip solution to amplify and level shift voltages accurately using no external components. It comes with three standard pin-selectable gain options (10, 20 and 50), which can be further combined to form gains from 0.141 to 80 with accuracy of 0.012% (120ppm). The LT1997-1 also operates with input voltages between V? and V? + 76V (independent of V+), enabling robust operation in demanding industrial environments. Its excellent resistor matching results in a common mode rejection ratio of greater than 109dB (Gain = 10).The resistors maintain their excellent matching over temperature; the matching temperature coefficient is guaranteed less than 1ppm/?C. The resistors are extremely linear with voltage, resulting in a gain nonlinearity of less than 2ppm. The LT1997-1 is fully specified at 5V and ?15V supplies and from ?40?C to 125?C. The device is available in space saving 16-lead MSOP and 4mm ? 4mm DFN14 packages.ApplicationsHigh Side or Low Side Current SensingBidirectional Wide Common Mode Range Current SensingHigh Voltage to Low Voltage Level TranslationIndustrial Data-Acquisition Front-EndsReplacement for Isolation CircuitsDifferential to Single-Ended Conversion

Demonstration circuit 2570A is a dual output, high efficiency, high density, µModule® regulator with 4.5V to 16V input range. The output voltage is adjustable from 0.5V to 33V and it can supply 50A maximum load current. The demo board has a LTM4678 µModule regulator, which is a dual 25A or single 50A step-down regulator with digital power system management. Please see LTM4678 data sheet for more detailed information. DC2570A powers up to default settings and produces power based on configuration resistors without the need for any serial bus communication. This allows easy evaluation of the DC/DC converter. To fully explore the extensive power system management features of the part, download the GUI software LTpowerPlay onto your PC and use Analog Devices’ I2C/SMBus/PMBus dongle DC1613A to connect to the board. LTpowerPlay allows the user to reconfigure the part on-the-fly and store the configuration in EEPROM, view telemetry of voltage, current, temperature and fault status.

Demonstration circuit 2599A features the LT8361 in a SEPIC configuration. It operates with a switching frequency of 400kHz and is designed to convert a 4.5V to 48V source to 24V, with up to 600mA output current (depending on input voltage). The LT8361 can operate with inputs as high as 60V. However, in this demo circuit, the input is limited by the voltage rating of the input capacitors. The demo board contains a selectable jumper, JP1, to aid in the selection of the desired Sync pin mode of operation. The default setting is Burst Mode® operation. This layout is optimized for good EMI performance and small solution size. Input and output filters and an optimized power switching loop, comprised of C20 and C21 are necessary to pass CISPR 25 Class 5 emissions, and are added by default. These components can be excluded in applications not requiring noise immunity. The data sheet gives a complete description of the device, operation and application information. The data sheet must be read in conjunction with this demo manual.

Demonstration circuit 2616A-B features a polyphase design using the LTM4645EY, a 25A high efficiency, switch mode step-down power µModule regulator. The input voltage range is from 6V to 15V. To use DC2616A-B for input voltage range from 4.7V to 6V, connect INTVCC to SVIN (change R22, R42, R55 from OPT to 0Ω), DRVCC to VIN (change R21, R38, R52 from 0Ω to OPT, R2, R39, R53 from OPT to 0Ω). The output voltage range is 0.6V to 1.8V. The DC2616A-B can deliver a nominal 75A output current with three LTM4645 modules in parallel. As explained in the data sheet, output current derating is necessary for certain VIN, VOUT, and thermal conditions. The board operates in continuous conduction mode in heavy load conditions. For high efficiency at low load currents, the MODE_PLLIN jumper selects pulse-skipping mode for noise sensitive applications or burst mode operation in less noise sensitive applications. The MODE_PLLIN pin also allows the LTM4645 to synchronize to an external clock signal. The phase shift between two adjacent phases is 120 degrees. DC2616A-B has the option of choosing both internal and external compensation circuit for LTM4645. The LTM4645 data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit DC2616A-B.

Demo circuit 2637A features four LT3045EDD-1s in parallel, generating an ultralow noise, ultrahigh power supply rejection ratio (PSRR) low dropout (LDO) regulator with programmable current limit. DC2637A operates over an input range of 3.8V to 20V, and is capable of delivering up to 2A output current by paralleling four LT3045EDD-1s with only 20mΩ ballast resistors. The VIOC tracking function of the LT3045EDD-1 controls an upstream switching converter to maintain a constant voltage across the regulator and hence minimize power dissipation. In the parallel configuration, connect the VIOC pin of only one IC to the switching converter, while the VIOC pins of the other ICs are left floating. The power good feedback (PGFB) pin is used to set a programmable power good threshold, and also activates the fast start-up circuitry. The PGFB is set on only one IC when they are paralleled. LT3045-1 also offers programmable current limit functionality by connecting a resistor from ILIM to GND on each device. Current monitoring is also achieved by sensing the ILIM pin voltage. Built-in protection includes reverse battery protection, reverse current protection, internal current limit with fold-back, and thermal limit with hysteresis. The LT3045-1 data sheet gives a complete description of the device, operation and applications information. The data sheet must be read in conjunction with this demo manual for demonstration circuit 2637A. The LT3045EDD-1 is assembled in a 12-lead (3mm × 3mm) plastic DFN package with an exposed pad on the bottom-side of the IC. Proper board layout is essential for maximum thermal performance.

The DC2691A programming board contains the circuitry needed to program and verify the EEPROM of the LTC2972. It is shipped with a clamshell style programming socket installed. The LTpowerPlay® *.proj file that corresponds to the factory default configuration can be found in the GUI. To properly program and verify the contents of the EEPROM, download and install the LTpowerPlay software (GUI). You also need a Linear Technology DC1613 USB to I2C/SMBus/PMBus Controller.

Demonstration circuit 2781A is a nonisolated buck converter featuring the LT8316. The demo board outputs 12V and maintains tight regulation with a load current from 10mA to 0.2A. It is optimized to operate over a wide 19V to 600V DC input voltage range. Output voltage accuracy stays within ±1% over the entire input voltage and load range. The LT8316 is a high voltage flyback controller that can implement a high voltage buck converter if isolation is not needed. The nonisolated buck converter is a smaller, lower cost solution than the flyback converter. Quasi-resonant boundary mode operation improves load regulation. The LT8316 is available in a thermally enhanced 20-pin TSSOP package with four pins removed for high voltage spacing. The LT8316 datasheet gives a complete description of the part, operation and application information. The datasheet must be read in conjunction with the DC2781A demo manual.