DC751A-G: Demo Board for the LTC2232 10-Bit, 105Msps ADCs.

The LTC4302-1/LTC4302-2 addressable I2C bus and SMBus compatible bus buffers allow a peripheral board to be inserted and removed from a live backplane without corruption of the bus. The LTC4302-1/LTC4302-2 maintain electrical isolation between the backplane and peripheral board until their VCC supply is valid and a master device on the backplane side addresses the LTC4302-1/LTC4302-2 and commands them to connect. The LTC4302-1/LTC4302-2?s ADDRESS pin provides 32 possible addresses set by an external resistive divider between VCC and GND. The LTC4302-1/LTC4302-2 work with supply voltages ranging from 2.7V to 5.5V. The SDA and SCL inputs and outputs do not load the bus lines when VCC is low.Rise time accelerator circuitry allows for heavier capacitive bus loading while still meeting system timing requirements. During insertion, the SDA and SCL lines are precharged to 1V to minimize bus disturbances. Two general purpose input/output pins (GPIOs) on the LTC4302-1 can be configured as inputs, open-drain outputs or push-pull outputs. The LTC4302-2 option replaces one GPIO pin with a second supply voltage pin VCC2, providing level shifting between systems with different supply voltages. The LTC4302-1/LTC4302-2 are available in a 10-pin MSOP package.Applications Live Board Insertion 5V/3.3V Level Translator Servers Capacitance Buffer/Bus Extender Nested Addressing

DC759A Demo Board for: LTC1698 Isolated Secondary Synchronous Rectifier Controller LT1952 Single Switch Synchronous Forward Controller

Demonstration circuit 761 is a low noise regulated charge pump featuring the LTC3204 (Burst Mode operation) in the 2X2 DFN package. There are two assembly versions, DC761A-A and DC761A-B for the LTC3204-5 (5V output) and LTC3204-3.3 (3.3V output) respectively. The DC761A-A produces a regulated 5V output from a 2.7V to 5.5V input. The guaranteed output load current is 150mA for VIN between 3.1V and 5.5V, and 65mA for VIN less than 3.1V. The DC761A-B produces a regulated 3.3V output from a 1.8V to 4.5V input. The guaranteed output current is 50mA from VIN between 1.9V and 4.5V, and 40mA for VIN less than 1.9V. The circuit requires only three tiny 0603 surface mount capacitors and uses minimal board space. No inductor or diodes are needed. The circuit features automatic Burst Mode® operation at light loads to maintain low supply current.

Demonstration Circuit 767 is an I2C-controlled high efficiency synchronous current mode buck regulator featuring the 600mA output LTC3447. The demo board input voltage range is 2.5V to 5.5V. The buck regulator has a programmable output range of 0.7V to 2.00V which is set with an internal 6-bit DAC via the I2C interface. The initial start-up voltage is set to 1.35V but can be change by changing feedback resistors R4 and R5.

Demonstration circuit DC770C is a 2-phase DC/DC boost converter featuring the LT3782A constant frequency current mode boost controller. The DC770C operates over 10V to 28V input and provides 4A of output current at 50V output. The 250kHz constant frequency operation results in a small and efficient circuit.

Demonstration circuit 776 is a 36V-72VIN, 2-switch forward converter with synchronous secondary-side control featuring the LTC3705 and LTC3706. This circuit was designed specifically to attain a high stepdown ratio power supply in one stage in order to efficiently power 1.5V loads from a typical telecom input voltage range. Isolation voltage is 1500VDC. This circuit features secondary-side control of the supply without the need of an optocoupler.

DC778A: Demo Board for the LTC2602 - Dual 16-Bit Rail-to-Rail DACs in 8-Lead MSOP.

The LTC3803 is a constant frequency current mode flyback controller optimized for driving N-channel MOSFETs in high input voltage applications. Constant frequency operation is maintained down to very light loads, resulting in less low frequency noise generation over a wide range of load currents. Slope compensation can be programmed with an external resistor.The LTC3803 provides ?1.5% output voltage accuracy and consumes only 240?A of quiescent current. Ground-referenced current sensing allows LTC3803-based converters to accept input supplies beyond the LTC3803?s absolute maximum VCC. A micropower hysteretic start-up feature allows efficient operation at high input voltages. For simplicity, the LTC3803 can also be powered from a high VIN through a resistor, due to its internal shunt regulator. An internal undervoltage lockout shuts down the LTC3803 when the input voltage is too low to provide sufficient gate drive to the external MOSFET.The LTC3803 is available in a low profile (1mm) 6-lead SOT-23 (ThinSOT?) package. Turn On Voltage Frequency LTC3803 8.7V 200kHz LTC3803-3 8.7V 300kHz LTC3803-5 4.8V 200kHz Applications Telecom Power Supplies 42V and 12V Automotive Power Supplies Auxiliary/Housekeeping Power Supplies Power Over Ethernet

DC782A-R: Demo Board for the LTC2248 14-Bit, 65Msps Low Power 3V ADCs.