Demonstration circuit 2814A-A is a high voltage, high efficiency synchronous buck-boost DC/DC converter with an input voltage range of 8V to 80V. After the part has started, the input voltage can run down to 3.5V. It can supply a 3A maximum load current with an output range of 8V to 16V. The demo board features the LT8210EUJ controller. The constant frequency current mode architecture allows a phase-lockable frequency of up to 400kHz, while an optional input or output current feedback loop provides support for applications such as battery charging. With a wide input range, wide output range, and seamless transfers between operation modes, the LT8210 is ideal for industrial, automotive, medical, military, and avionics applications.  The converter has four modes of operation: burst, pulse skip, forced continuous mode, or pass-thru. Pass-thru is a feature that passes the input directly to the output when the input voltage is within a user programmable window. Switching losses drop to zero and efficiency is maximized. For input voltage above or below the pass-thru window, the buck or boost regulation loops maintain the output at the set maximum or minimum values, respectively. Reverse input protection is also implemented on this demo board.  The available versions of the DC2814A are: DC2814A-A: 8V to 40VIN, 80VIN Surge (60s), Operates Down to 3.5VIN after Start-Up, VOUT = 8V to 16V at 3A DC2814A-B: 9V to 36VIN, 80VIN Surge (60s), VOUT = 24V to 36V at 2.5A DC2814A-C: 26V to 80VIN, VOUT = 36V to 56V at 2A

Demonstration circuit 2845A features the LTM4680, which is a dual 30A or single 60A μModule® regulator with 4.5V to 16V input range. The two channels of the LTM4680 are paralleled on this board, so it can deliver 60A maximum load current. The output voltage is adjustable from 0.5V to 3.3V. Please see LTM4680 data sheet for more detailed information. DC2845A 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 ADI 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. LTpowerPlay software can be downloaded here. The USB to PMBus Controller Dongle DC1613A for use with LTpowerPlay is available here.

Demonstration circuit DC2855A is a triple output synchronous step-up/dual step-down supply featuring the LTC 7818. The demonstration circuit is designed for two buck outputs 5V/10A, 3.3V/10A supplied by a boosted 10V output. Benefiting from this feature, the buck outputs are able to maintain regulation over a wide input voltage range of 4.5V to 36V which is suitable for automotive or other battery fed applications. Also, the demonstration circuit uses a drop-in layout whereas the main buck circuit components fit in an area of ¾” by 1½”, while the main boost circuit area is ¾” by 1¾”. The package style for the LTC7818 is a 40-pin exposed pad QFN. The main features of the board include rail tracking (Buck channels only), an internal 5V linear regulator for bias, separated RUN pins for each output, a PGOOD signal (CH1 only), an overvoltage indicator for CH3 and a Mode selector that allow the converter to run in CCM, Pulseskipping or Burst Mode operation. Spread Spectrum Mode is availiable for EMI improvement. Synchronization to an external clock is also possible. The LTC7818 datasheet gives a complete description of these parts, operation and application information. The datasheet must be read in conjunction with this quick start guide for demo circuit 2855A.

Demonstration circuit 2891A features the LTM4670EY, a high efficiency, quad 10A step-down power μModule® regulator. The input voltage range is from 2.25V to 5.5V. The output voltage range is 0.5V to VIN. Derating is necessary for certain VIN, VOUT, frequency and thermal conditions. The DC2891A offers the SSTT pin allowing the user to program output tracking, soft-start period and die temperature monitoring. The MODE/SYNC pin either synchronizes the switching frequency to an external clock, is a clock output, or sets the PWM mode. The PWM modes of operation are forced continues mode for low noise or pulse-skipping mode for high efficiency at light load. The LTM4670 defaults to forced continues mode in regulation and during synchronization. The LTM4670 operates in pulse-skipping mode when both the FREQ and MODE/SYNC pins are connected to VIN. DC2891A has optional jumper resistors to parallel multiple LTM4670 channels. For paralleled channels, one channel can be set as master, and the rest can be set as slaves. The phase shift of a slave channel relative to the master channel can be programmed with a resistor divider on the FREQ pin. For DC2891A, four channels of LTM4670 are working separately and all set as master. A multiphase oscillator LTC6902 is used to set 90-degree phase shift between adjacent phases and reduce the amount of ripple current in both the input and output capacitors. The LTM4670 data sheet must be read in conjunction with the demo manual prior to working on or modifying demo circuit DC2891A.

Demonstration circuit 2911A is an IEEE 802.3bt compliant and LTPoE++ interoperable Power over Ethernet (PoE) Powered Device (PD). It features the LT4293 PD interface controller and the LT4321 PoE ideal diode bridge controller. The LT4293 provides LTPoE++, IEEE 802.3af (PoE, Type 1), IEEE 802.3at (PoE+, Type 2), and IEEE 802.3bt (PoE++, Type 3 and 4) compliant interfacing. It utilizes an external, low RDS(ON) (30mΩ typical) N-channel MOSFET for the Hot Swap function to improve efficiency. Power good (PWRGD) output indicates the PD controller is ready to provide power to the downstream load. This signal can be used to enable an isolated power supply. The T2P output indicates the available power from the Power Sourcing Equipment (PSE). This signal communicates allocated power from either LTPoE++ or IEEE 802.3bt-compliant PSEs to the downstream PD circuitry. The LT4321 controls eight low RDS(ON) (57mΩ typical) N-channel MOSFETs to further improve end-to-end power delivery efficiency and ease thermal design. This solution replaces the eight diodes typically found in a passive PoE rectifier bridge. The DC2911A accepts up to 90W of delivered power from a PSE via the RJ45 connector (J1) or a local 48V DC power supply using the auxiliary supply input. When both supplies are connected, the auxiliary supply input has priority over the PoE input.

Demonstration circuit 2937A features the LT8357 as a 360kHz low IQ, high power boost converter with a 48V output from 10V to 40V input. This demonstration circuit features spread spectrum frequency modulation (SSFM) and split gate driver pins for the high power, high voltage switch. The converter can output 2A and higher (see Figure 3 in the demo manual). When placed in shutdown, the converter has very low quiescent current, ideal in automotive and other battery-powered applications. Low quiescent current can be achieved with both pulse-skipping and Burst Mode® operation as jumper selections on this demonstration circuit. The LT8357 boost controller IC operates over an input range of 3V to 60V, suitable for automotive, telecom and industrial applications. It also exhibits a low quiescent current of 8μA, making it ideal for battery-operated systems. It drives a low side N-channel power MOSFET with a 5V split gate drive. The controller provides adjustable and synchronizable operation from 100kHz to 2MHz. At light load, either pulse-skipping or low-ripple Burst Mode operation can be selected to improve the efficiency. It also packs many popular features such as soft-start, input undervoltage lockout, adjustable frequency and clock synchronization. PGOOD indicates when the output voltage is in regulation. The LT8357 comes in a thermally enhanced 12-lead plastic MSE package. The LT8357 data sheet gives a complete description of the part, pins, features, operation and application information. The data sheet must be read in conjunction with the demo manual for DC2937A.

The LTC4246 contains eight switches, each with an independent circuit breaker function. It is particularly well suited for extremely space constrained designs. Each switch can operate completely autonomously or be arbitrarily grouped with other switches that will respond together to the fault of any single device within its group. Optionally, channel grouping may be extended to multiple LTC4246 devices by selecting the FIN# (fault input) pin as part of a channel group. A required bias supply between 2.5V to 5V allows the switches to independently operate from 13.2V down to 0V. The LTC4246 provides an SPI serial interface to enable, disable and configure the timing and current thresholds of each channel as well as provide status to each channel?s fault state.A common open-drain FAULT status output indicates if any switch has opened due to a circuit breaker event.APPLICATIONSATE Wafer Probe ElectronicsScope Probe ProtectionIndustrial ControlRelay Replacement

The LTC4372/LTC4373 are positive high voltage ideal diode controllers that drive an external N-channel MOSFET to replace a Schottky diode. They control the forward voltage drop across the MOSFET to ensure current delivery or current transfer from one path to the other even at light loads.A 5?A operating current achieves high efficiency for intermittent load applications or always-on backup power supplies. If a power source fails or is shorted, a fast turn-off minimizes reverse current transients. The LTC4372/LTC4373 control back-to-back N-channel MOSFETs for inrush current control and load switching.The LTC4372?s SHDN pin keeps the MOSFET off and reduces the quiescent current to 3.5?A. The LTC4373 has a UV pin for undervoltage monitoring while the UVOUT?pin provides hysteresis adjustment and status information. During undervoltage, the back-to-back MOSFETs are cut off and quiescent current reduces to 0.5?A.APPLICATIONS Automotive Battery Protection Redundant Power Supplies Portable Instrumentation Solar Powered Systems Energy Harvesting Applications Supply Holdup

The LT8386 is a monolithic, synchronous, step-up DC-to-DC converter that utilizes fixed frequency, peak current control and provides PWM dimming for a string of LEDs. The LED current is programmed by an analog voltage or digital pulses at the CTRL pin. The LT8386 will maintain 2% current regulation through an external sense resistor over a wide range of output voltages.The LT8386 features Silent Switcher? technology designed to minimize EMI/EMC emissions with high efficiency. The switching frequency is programmable from 200kHz to 2MHz by an external resistor at the RT pin or by an external clock applied at the SYNC/SPRD pin. With the optional spread spectrum frequency modulation enabled, the frequency varies from 100% to 125% to reduce EMI.The LT8386 includes a driver for an external high side PMOS for PWM dimming. The 60V rated LT8386 is pin-to-pin compatible with the LT3922 and LT3922-1.APPLICATIONS Automotive and Industrial Lighting Heads Up Display (HUD)/Machine Vision

DC306A-A Demo Board for: LT1361 Dual and Quad 50MHz, 800V/µs Op Amps LT1795 Dual 500mA/50MHz Current Feedback Line Driver Amplifier