The ADuM4221/ADuM4221-1/ADuM4221-2 are 4 A isolated, half bridge gate drivers that employ the Analog Devices, Inc., iCoupler? technology to provide independent and isolated high-side and low-side outputs. The ADuM4221/ADuM4221-1/ADuM4221-2 provide 5700 V rms isolation in an increased creepage wide body, 16-lead SOIC_IC. Combining high speed CMOS and monolithic transformer technology, these isolation components provide outstanding performance characteristics superior to the alternatives, such as the combination of pulse transformers and gate drivers.The isolators operate with a logic input voltage ranging from 2.5 V to 6.5 V, providing compatibility with lower voltage systems. In comparison to gate drivers employing high voltage level translation methodologies, the ADuM4221/ADuM4221-1/ADuM4221-2 offer the benefit of true, galvanic isolation between the input and each output.The ADuM4221/ADuM4221-1/ADuM4221-2 each have built in overlap protection and allow dead time adjustment. A single resistor between the dead time pin (DT) and the GND1 pin sets the dead time on the secondary side between the high-side and the low-side outputs.An internal thermal shutdown (TSD) sets outputs low if the internal temperature on the ADuM4221/ADuM4221-1/ADuM4221-2 exceeds the TSD temperature. As a result, the ADuM4221/ADuM4221-1/ADuM4221-2 provide reliable control over the switching characteristics of the insulated gate bipolar transistor (IGBT)/metal-oxide semiconductor field effect transistor (MOSFET) configurations over a wide range of positive or negative switching voltages.Applications Switching power supplies Isolated IGBT/MOSFET gate drives Industrial inverters Gallium nitride (GaN)/silicon carbide (SiC) compatible1 Protected by U.S. Patents 5,952,849; 6,873,065; 7,075,239. Other patents pending.

DC671A: Demo Board for the LTC4257-1 IEEE 802.3af PD Power over Ethernet Interface Controller with Dual Current Limit.

The LTC3426 step-up switching regulator generates an output voltage of up to 5.5V from an input voltage as low as 1.6V. Ideal for applications where space is limited, it switches at 1.2MHz, allowing the use of tiny, low cost and low profile external components. Its internal 2A, 100m? NMOS switch provides high efficiency even at heavy load, while the constant frequency, current mode architecture results in low, predictable output noise that is easy to filter.Anti-ringing circuitry reduces EMI concerns by damping the inductor while in discontinuous mode, and internal soft-start eases inrush current worries. Internal frequency compensation is designed to accommodate ceramic output capacitors, further reducing noise. The device features very low shutdown current of 0.5?A.The LTC3426 is available in the 6-lead SOT-23 package.Protected by U.S. Patents, including 6498466, 6611131Applications White LED Driver Supply Local 3.3V or 5V Supply Battery Back-Up

DC740A-A: Demo Board for the LTC2922 Power Supply Tracker with Input Monitors.

The LTC2950 is a micropower, wide input voltage range, pushbutton ON/OFF controller. The part contains a pushbutton input with independently programmable ON and OFF debounce times that control the toggling of an open drain enable output. The part also contains a simple microprocessor interface to allow for proper system housekeeping prior to power down. Under system fault conditions, an internal KILL timer ensures proper power down.The LTC2950 operates over a wide 2.7V to 26.4V input voltage range to accommodate a wide variety of input power supplies. Very low quiescent current (6?A typical) makes the LTC2950 ideally suited for battery powered applications. Two versions of the part are available to accommodate either positive or negative enable polarities. The parts are available in either 8-lead 3mm ? 2mm DFN or ThinSOT packages.Applications Portable Instrumentation Meters Blade Servers Portable Customer Service PDA Desktop and Notebook Computers

Demonstration circuit 932A is an adjustable 1A linear regulator featuring LT3022. The LT3022 is a very low dropout voltage (VLDO™) linear regulator that operates from input supplies down to 0.9V. The device supplies 1A of output current with 145mV typical dropout voltage. The LT3022 is ideal for low input voltage to low output voltage applications, providing comparable electrical efficiency to a switching regulator. The demo board has an input voltage range from 1V to 10V and provides a jumper-selectable output voltage of 0.9V, 1V, 1.2V, 1.5V, 1.8V or a user-defined value down to 200mV. The regulator optimizes stability and transient response with low ESR ceramic output capacitors as small as 10µF. Other LT3022 features include 0.05% typical line regulation and 0.05% typical load regulation. In shutdown, the quiescent current typically drops to 7.5µA. Internal protection circuitry includes reverse-battery protection, current limiting, thermal limiting with hysteresis and reverse-current protection.

Demonstration circuit DC937A is a complete power controller for a USB powered device. It is based on the LTC4085 and provides a constant-current, constant-voltage linear battery charger, a USB power manager with PowerPath management for the battery. The 700mA CC/CV timer terminated, temperature qualified, linear charger targets Li-Ion batteries, and the USB power manager insures compliance with the USB power specification and PowerPath management for the battery. The demo board's input voltage range is 4.5V to 5.5V.

Demonstration circuit 2234A is a synchronous sepic converter featuring the LT8711 multitopology switching controller. The LT8711 is a current mode PWM DC/DC controller with a dual input LDO to optimize gate driver efficiency. Ultralow 15μA quiescent current in low noise Burst Mode® operation achieves high efficiency at very light loads and helps extend the run-time in battery powered applications when in standby mode. The LT8711 switching frequency can be programmed either via oscillator resistor or external clock over a 100kHz to 750kHz range.

Demonstration circuit 2069A features LT8490, a high performance buck-boost converter that implements an MPPT function and flexible charging profiles suitable for most battery types such as flooded and sealed lead acid batteries and Lithium-Ion batteries, and can operate from input voltages above, below or equal to the battery voltage.

Demonstration circuit 1586A is a high efficiency, dual-output (3.3V and 2.5V), synchronous buck converter with 4.5V to 25V input range. It can supply 5A maximum load current at 3.3V and 2.5V outputs. The demo board uses the LTC3855EUJ controller. The LTC3855 is a feature-rich dual-output dual-phase synchronous buck controller with on-chip drivers, remote output voltage sensing (VOUT2) and inductor DCR temperature compensation.