The LTC1751 family are micropower charge pump DC/DC converters that produce a regulated output voltage at up to 100mA. The input voltage range is 2V to 5.5V. Extremely low operating current (20?A typical with no load) and low external parts count (one flying capacitor and two small bypass capacitors at VIN and VOUT) make them ideally suited for small, battery-powered applications.The LTC1751 family operate as Burst Mode? switched capacitor voltage doublers to achieve ultralow quiescent current. They have thermal shutdown capability and can survive a continuous short circuit from Vout to GND. The PGOOD pin on the LTC1751-3.3 and LTC1751-5 indicates when the output voltage has reached its final value and if the output has an undervoltage fault condition. The FB pin of the adjustable LTC1751 can be used to program the desired output voltage or current. An optional soft-start capacitor may be used at the SS pin to prevent excessive inrush current during start-up.The LTC1751 family is available in an 8-pin MSOP package.Applications Li-Ion Battery Backup Supplies Local 3V and 5V Conversion Smart Card Readers PCMCIA Local 5V Supplies White LED Backlighting

DC333A-A: Demo Board for the LT5502 400MHz Quadrature IF Demodulator with RSSI.

DC344A: Demo Board for the LTC2420 20-Bit µPower No Latency Delta-Sigma ADC in SO-8

The LTC1928-5 is a doubler charge pump with an internal low noise, low dropout (LDO) linear regulator. The part is designed to provide a low noise boosted supply voltage for powering noise sensitive devices such as high frequency VCOs in wireless applicationsAn internal charge pump converts a 2.7V to 4.4V input to a boosted output, while the internal LDO regulator converts the boosted voltage to a low noise regulated output. The regulator is capable of supplying up to 30mA of output current. Shutdown reduces the supply current to

DC373A-A: Demo Board for the LT1725 General Purpose Isolated Flyback Controller.

DC377B-A: Demo Board for the LTC3716 - 2-Phase, 5-Bit VID, Current Mode, High Efficiency, Synchronous Step-Down Switching Regulator

DC382A: Demo Board for LTC2415 24-Bit No Latency Delta Sigma ADC with Differential Input and Differential Reference.

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

Demonstration circuit 392 is a dual output, step-down, synchronous buck converter featuring either the 150kHz to 300kHz LTC1628EUH controller (DC392A-A), the 250kHz to 550kHz LTC3728EUH (DC392A-B) or 250kHz to 550kHz LTC3728LUH (DC392A-C). It operates with an input voltage range of 7V to 24V and provides 3.3V @ 5A and 5V @ 4A at its output.

Demonstration circuit 397 is a multipurpose DC/DC switching regulator using the LT1930A and LT1931A voltage regulators in a SOT-23 package. The demo board offers three separate DC/DC converters for different applications needs. The boost circuit is designed to convert a 5V input to 12V output at 250mA maximum load. The SEPIC circuit generates a constant 12V/250mA (max load) output with a 10V~16V variable input. The inverter circuit is de-signed for applications requiring negative 12V/250mA (max load) from a positive 12V input. All three circuits are designed to demonstrate fast switching frequency (2.2MHz), an internal 36V/1A switch, wide input range, and small circuit size.

DC398A-A: Demo Board for LTC3400 600mA, 1.2MHz Micropower Synchronous Boost Converters in ThinSOT.

DC409A: Demo Board for the LTC3402 2A, 3MHz Micropower Synchronous Boost Converter

The LTC3404 is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. Supply current during operation is only 10?A and drops to < 1?A in shutdown. The 2.65V to 6V input voltage range makes the LTC3404 ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems.Switching frequency is internally set at 1.4MHz, allowing the use of small surface mount inductors and capacitors. For noise sensitive applications the LTC3404 can be externally synchronized from 1MHz to 1.7MHz. Burst Mode operation is inhibited during synchronization or when the SYNC/MODE pin is pulled low, preventing low frequency ripple from interfering with audio circuitry. The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. Low output voltages are easily supported with the 0.8V feedback reference voltage. The LTC3404 is available in a space saving 8-lead MSOP package. For higher input voltage (11V abs max) applications, refer to the LTC1877 data sheet.Applications Cellular Telephones Wireless and DSL Modems Personal Information Appliances Portable Instruments Distributed Power Systems Battery-Powered Equipment

DC426A: Demo Board for the LT5511 High Signal Level Upconverting Mixer.

DC427B-B: Demo Board for the LTC1967 Precision Extended Bandwidth, RMS-to-DC Converter.

DC427B-C: Demo Board for the LTC1968 Precision Wide Bandwidth, RMS-to-DC Converter.

The LTC1879 is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. Operating supply current is only 15?A with no load and drops to

Demonstration circuit DC437 is a low noise negative micropower voltage regulator using the LT1964 low dropout linear regulator, which comes in a tiny 5-Pin SOT-23 package. The DC437 has an input voltage range from –2.3V to –20V, and is capable of delivering up to 200mA of output current. There are two circuits on this demo board: one uses the LT1964ES5-BYP which allows the internal reference to be bypassed to reduced output voltage noise, and the other uses the LT1964ES5-SD which has the shutdown feature. The output voltage is jumper-selectable and can be set to -1.22V, -5V or a user-determined value.

DC453B-B: Demo Board for LT1970A 500mA Power Op Amp with Adjustable Precision Current Limit.

DC454A: Demo Board for LTC1733 Monolithic Linear Lithium-Ion Battery Charger with Thermal Regulation.