Demonstration circuit 999A is a wide input range, 3.3V, synchronous buck-boost converter featuring the LTC3533.  This circuit is designed to demonstrate the high level of performance, efficiency and small solution size attainable using this part in a buck-boost power supply. It operates at 1MHz and produces a regulated 3.3V from an input voltage range of 2.4V to 5.5V, and operates down to 1.8V with de-rated output current.

Demonstration circuit 3077A is a compact no-opto isolated flyback converter featuring the LT3002. The DC3077A outputs 12V and maintains tight regulation with a load current from 5mA up to 1.1A over an input voltage from 10V to 30V. The output current capability increases with the input voltage, as shown in the Performance Summary table. Transformer leakage inductance causes a voltage spike on the primary side after the power switch turns off. The leakage inductance spike is limited within the MOSFET’s voltage rating of 65V with an RC snubber and a TVS clamp which damp the ringing and clamp the MOSFET drain voltage to a safe level. The Performance Summary table summarizes the performance of the demo board at room temperature. The DC3077A demo circuit can be easily modified for different applications with some pre-designed transformers. The LT3002 data sheet gives a complete description of the part, operation and application information. The data sheet must be read in conjunction with this quick start guide for demo circuit 3077A.

Demonstration circuit DC330 comprises two low noise micropower voltage regulators using the LT1761 in the 5-lead SOT-23 package. These circuits are primarily used in cellular phones, voltage controlled oscillators, RF power supplies and as local regulators in larger systems. Their ability to tolerate a wide variety of output capacitors makes them ideal in space- and cost-sensitive systems.

Demonstration circuit DC339-A is a low noise micropower voltage regulator using the 150mA output current LT1762 linear regulator in an 8-lead MSOP package. The demo board has an input voltage range from 2.3V to 20V and a jumper-selectable output votlage that can be set to 1.22V, 2.5V, 3.0V, 3.3V, 5V or a user-defined value. The LT1762's low 20µVRMS (10Hz to 100kHz bandwidth) output noise and low 30µA quiescent current make the device ideal for voltage-controlled oscillators, RF power supplies and local regulators in larger systems.

DC389A-C: Demo Board for LTC3778 Wide Operating Range, No RSENSE Step-Down Controller.

DC480A-F: Demo Board for the LTC3405A 1.5MHz, 300mA Synchronous Step-Down Regulator in ThinSOT.

Demonstration circuit 536B is a hot swap controller with multifunction current control featuring the LTC4211. The DC536B-A is configured to operate with up to 7A load and DC536B-B up to 20A load.

DC872A: Demo Board for the LTC4213 No RSENSE Electronic Circuit Breaker.

Demonstration circuit 1145B, featuring the LTC4267, provides a complete IEEE 802.3af Powered Device (PD) interface and isolated 12V at 0.9A power supply solution for use in Power over Ethernet (PoE) applications. An optional connection is included for a 12V auxiliary supply on the secondary side that disables PoE when present.

Demonstration circuit 1219A-A, A-B, A-C and A-D are micropower low noise boost converters with output disconnect featuring the four different LT3495 versions: LT3495 (0.65A switch current, switching frequency above audible range), LT3495B (0.65A switch current), LT3495-1 (0.35 switch current, switching frequency above audible range) and LT3495B-1 (0.35A switch current). All versions convert a 3V-6V source to 15V. The A-A and A-B versions supply 75mA at 3VIN, while the A-C and A-D supply 36mA.  All versions feature a low noise control scheme, integrated output disconnect function, dimming control and a single output sense resistor.