Demonstration circuit DC2744 is a two stage DC/DC boost converter featuring the LTC7840, a constant frequency current mode boost controller. The DC2744A operates over a 9V to 36V input voltage range. The first stage boost generates VOUT1 at 48V. The second stage boost takes this 48V input and provides a 240V output with 0.7A of load current. The 150kHz constant frequency operation results in a small and efficient circuit. The converter provides high output voltage accuracy (typically ±3%) over a wide load range with no minimum load requirement. The demonstration circuit can be easily modified to generate different output voltages. The DC2744 has small circuit footprint. It is a high performance cost effective solution for applications that require high step-up voltage ratios and high output power.

Demonstration Circuit 2745A features the LTC3309A 5V, 6A synchronous step-down silent switcher operating as a 2MHz 3.3V to 1.2V 6A buck regulator. The LTC3309A supports adjustable output voltages from 0.5V to VIN, operating frequencies from 1MHz up to 3MHz. The LTC3309A is a compact, ultralow emission, high efficiency, and high speed synchronous monolithic step-down switching regulator. Fast minimum on-time of 22ns enables high VIN to low VOUT conversion at high frequency. DC2745A operating mode may be selected as Burst Mode® operation, skip or forced continuous (FC) mode. Setting JP1 to the FC/SYNC position will allow the LTC3309A to sync to a clock frequency from 1MHz to 3MHz. The LTC3309A operates in forced continuous mode when syncing to an external clock. RT is connected to VIN through a 0Ω resistor, R9, which sets the operating frequency to 2MHz. The frequency can be easily changed by removing R9 and setting an appropriate resistor in the R4 location to obtain the desired frequency. Refer to the LTC3309A data sheet for the proper RT value. The DC2745A also has an EMI filter to reduce conducted EMI. This EMI filter can be included by applying the input voltage at the VIN EMI terminal. The EMI performance of the board is shown in the EMI Test Results section. The red lines in the EMI performance graphs illustrate the CISPR25 Class 5 peak limits for the conducted and radiated emission tests. The LTC3309A data sheet gives a complete description of the part, operation and application information. The data sheet must be read in conjunction with this demo. The LTC3309A is assembled in a 3mm × 3mm LQFN package with exposed pads for low thermal  resistance. The layout recommendations for low EMI operation and maximum thermal performance are available in the data sheet section Low EMI PCB Layout. The Efficiency vs Load graph shows the efficiency and the power loss of the circuit with a 3.3V input in Burst Mode operation. The LTC3309A is available in a 12-lead 2mm × 2mm LGA package.

The LTC1662 is an ultralow power, fully buffered voltage output, dual 10-bit digital-to-analog converter (DAC). Each DAC channel draws just 1.7?A (typ) total supply-plus-reference operating current, yet is capable of supplying DC output currents in excess of 1mA and reliably driving capacitive loads of up to 1000pF. A programmable Sleep mode further reduces total operating current to 0.05?A. Linear Technology?s proprietary, inherently monotonic architecture provides excellent linearity and an exceptionally small external form factor. The double-buffered input logic provides simultaneous update capability and can be used to write to the DACs without interrupting Sleep mode. With its tiny operating current and exceptionally small size, the LTC1662 is ideal for use in the most power-constrained products. For most designs, there is no perceptible impact on the power budget; the LTC1662 draws many times less current than even a trimpot, while providing buffered, low impedance (0.5? typical, VCC = 5V) rail-to-rail outputs. The LTC1662 is pin and software compatible with the LTC1661 dual, 60?A 10-bit DAC. It is available in 8-pin MSOP and PDIP packages and is specified over the industrial temperature range.Applications Mobile Communications Portable Battery-Powered Instruments Remote or Inaccessible Adjustments Digitally Controlled Amplifiers and Attenuators Factory or Field Calibration

The 8-bit LTC1665 and 10-bit LTC1660 integrate eight accurate, serially addressable digital-to-analog converters (DACs) in tiny 16-pin narrow SSOP packages. Each buffered DAC draws just 56?A total supply current, yet is capable of supplying DC output currents in excess of 5mA and reliably driving capacitive loads to 1000pF. Sleep mode further reduces total supply current to 1?A.Proprietary, inherently monotonic voltage interpolation architecture provides excellent linearity while allowing for an exceptionally small external form factor.Ultralow supply current, power-saving Sleep mode and extremely compact size make the LTC1665 and LTC1660 ideal for battery-powered applications, while their ease of use, high performance and wide supply range make them excellent choices as general purpose converters.Applications Mobile Communications Remote Industrial Devices Automatic Calibration for Manufacturing Portable Battery-Powered Instruments Trim/Adjust Applications

The LTC1664 integrates four accurate, serially addressable 10-bit digital-to-analog converters (DACs) in a tiny 16-pin Narrow SSOP package. Each buffered DAC draws just 59?A total supply current, yet is capable of supplying DC output currents in excess of 5mA and reliably driving capacitive loads of up to 1000pF. Sleep mode further reduces total supply current to 1?A.Proprietary, inherently monotonic voltage interpolation architecture provides excellent linearity while allowing for an exceptionally small external form factor.Ultralow supply current, power-saving Sleep mode and extremely compact size make the LTC1664 ideal for battery-powered applications, while its ease of use, high performance and wide supply range make it an excellent choice as a general-purpose converter.Applications Mobile Communications Remote Industrial Devices Automatic Calibration for Manufacturing Portable Battery-Powered Instruments Trim/Adjust Applications

The LTC6561 is a low-noise four-channel, transimpedance amplifier (TIA)with 220MHz bandwidth. The LTC6561 multi-channel transimpedance amplifier?s low noise, high transimpedance, and low power dissipation are ideal for LIDAR receivers using Avalanche Photodiodes (APDs). The amplifier features 74k? transimpedance gain and 30?A linear input current range. Using an APD input circuit with a total capacitance of 2pF, the input current noise density is 4.5pA/?Hz at 200MHz. With lower capacitance, noise and bandwidth improve further. Only a 5V single supply is needed and the device consumes only 200mW. Utilizing the internal 4-to-1 MUX along with the LTC6561?s output MUX; multiple 4-channel LTC6561 devices can be combined to directly interface with 8, 12, 16 and 32-channel APD arrays. The LTC6561?s fast overload recovery and fast channel switchover make it well suited for LIDAR receivers with multiple APDs. Its single-ended output can swing 2VP-P on a 100? load. While its low impedance op amp-style output can drive back-terminated 50? cables.The LTC6561 is packaged in a compact 4mm ? 4mm 24-pin leadless QFN package with an exposed pad for thermal management and low inductance.Applications LIDAR Receiver Industrial Imaging

Demonstration circuit 2814A-B is a high voltage, high efficiency synchronous buck-boost DC/DC converter with an input voltage range of 9V to 80V. It can supply a 2.5A maximum load current with an output range of 24V to 34V. 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 to –40V 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

The LT3120 is a high efficiency 26V monolithic buck-boost converter. Extensive feature integration and very low resistance internal power switches minimize the total solution footprint for even the most demanding applications. A proprietary 4-switch PWM architecture provides seamless low noise operation from input voltages above, equal to, or below the output voltage.External frequency programming as well as synchronization using an internal PLL enable operation over a wide switching frequency range of 400kHz to 2MHz. The wide 2.5V to 26V input range is well suited for operation from unregulated power sources including battery stacks and backup capacitors. After start-up, operation is possible with input voltages as low as 500mV.Other features include, output short-circuit protection, thermal overload protection, less than 3?A shutdown current, power good indicator, Burst Mode operation, and maximum power point control.The LT3120 is offered in thermally enhanced 28-lead 4mm ? 5mm LQFN package.APPLICATIONS RF Power Supply USB Power Delivery System Backup Power Supply 1-Cell to 5-Cell Lithium Battery Powered Products Wide Input Range Power Supply Lead Acid to 12V Regulator

The LTM8060 is quad 40VIN, 3A step-down Silent Switcher ?Module? regulator. The Silent Switcher architecture minimizes EMI while delivering high efficiency at frequencies up to 3MHz. Included in the package are the controllers, power switches, inductors, and support components. Operating over a wide input voltage range, the LTM8060 supports output voltages from 0.8V to 8V, and a switching frequency range of 200kHz to 3MHz, each set by a single resistor. Only the bulk input and output filter capacitors, are needed to finish the design. The LTM8060 product video is available on website.The LTM8060 is packaged in a compact (11.9mm ? 16mm ? 3.32mm) over-molded Ball Grid Array (BGA) package suitable for automated assembly by standard surface mount equipment. The LTM8060 is available with SnPb (BGA) or RoHS compliant.Configurable Output ArrayThe LTM8060 outputs can be paralleled in an array for up to 12A capability.APPLICATIONS Automated Test Equipment Industrial Supplies Medical Equipment

The LTM2810 is a complete galvanic digital ?Module? (micromodule) isolator. No external components are required. Individual 3V to 5.5V supplies power each side of the digital isolator. Separate logic supply pins allow easy interfacing with different logic levels from 1.62V to 5.5V, independent of the main supply.Module options are available with compatibility to SPI (LTM2810-S) and I2C (LTM2810-I), master mode only, specifications.The module includes an integrated transformer driver on the logic side and an LDO on the isolated side to regulate the rectified transformer output. The LDO output is nominally 5V but may be overdriven.Coupled inductors provide 7500VRMS of isolation between the input and output logic interface. This device is ideal for systems with different ground potentials, allowing uninterrupted communication through large common mode transients faster than 50kV/?s.APPLICATIONS EV/HEV Systems Industrial and Metering Systems Test and Measurement Equipment Medical Equipment