The LTC3726 is a secondary-side controller for synchronous forward converters. When used in conjunction with the LTC3705/LTC3725 gate driver and primary-side controllers, the part creates a complete isolated power supply that combines the simplicity of OPTI-LOOP? compensation with the speed of secondary-side control.The LTC3726 has been designed to simplify the design of highly efficient, secondary-side forward converters. Working in concert with the LTC3705 or LTC 3725, the LTC3726 forms a robust, self-starting converter that eliminates the need for the separate bias regulator that is commonly used in secondary-side control applications. In addition, a proprietary scheme is used to multiplex gate drive signals and DC bias power across the isolation barrier through a single, tiny pulse transformer.The LTC3726 is available in a 16-lead SSOP package.Applications Isolated 48V Telecommunication Systems Internet Servers and Routers Distributed Power Step-Down Converters Automotive and Heavy Equipment

The LTC3612 is a low quiescent current monolithic synchronous buck regulator using a current mode, constant frequency architecture. The no-load DC supply current in sleep mode is only 70?A while maintaining the output voltage (Burst Mode operation) at no load, dropping to zero current in shutdown. The 2.25V to 5.5V input supply voltage range makes the LTC3612 ideally suited for single Li-Ion as well as fixed low voltage input applications. 100% duty cycle capability provides low dropout operation, extending the operating time in battery-powered systems.The operating frequency is externally programmable up to 4MHz, allowing the use of small surface mount inductors. For switching noise-sensitive applications, the LTC3612 can be synchronized to an external clock at up to 4MHz.Forced continuous mode operation in the LTC3612 reduces noise and RF interference. Adjustable compensation allows the transient response to be optimized over a wide range of loads and output capacitors.The internal synchronous switch increases efficiency and eliminates the need for an external catch diode, saving external components and board space. The LTC3612 is offered in a leadless 20-pin 3mm ? 4mm QFN or a thermally enhanced 20-pin TSSOP package.APPLICATIONS Point-of-Load Supplies Distributed Power Supplies Portable Computer Systems DDR Memory Termination Handheld Devices

Demonstration circuit 1311 is a Telecom isolated DC/DC converter featuring the LTC3805/-5 constant frequency current mode flyback controller. The DC1311 converts 18V to 72V input voltage to an isolated 3A of output current at 3.3V. The 300kHz constant frequency operation is maintained down to very light load to reduce low frequency noise generated over a wide range of load current. The converter provides high output voltage accuracy (typically ±2%) over wide load range with no minimum load requirement. The DC1311 also provides non-isolated design by removing opto coupler and LTC4430 circuit. The demonstration circuit can be easily modified to generate different output voltages up to 15V. As output voltage is increased, the maximum output current must be reduced to limit the output power to no more than 10W.

DC1316A: Demo Board for LT1913 25V, 3.5A, 2.4MHz Step-Down Switching Regulator.

The LT1952/LT1952-1 are current mode PWM controllers optimized to control the forward converter topology, using one primary MOSFET. The LT1952/LT1952-1 provide synchronous rectifier control, resulting in extremely high efficiency. A programmable Volt-Second clamp provides a safeguard for transformer reset that prevents saturation. This allows a single MOSFET on the primary side to reliably run at greater than 50% duty cycle for high MOSFET, transformer and rectifier utilization. The devices include soft-start for controlled exit from shutdown and undervoltage lockout. A precision 107mV current limit threshold, independent of duty cycle, combines with softstart to provide hiccup short circuit protection. The LT1952 is optimized for micropower bootstrap startup from high input voltages. The LT1952-1 allows startup from lower input voltages. Programmable slope compensation and leading edge blanking allow optimization of loop bandwidth with a wide range of inductors and MOSFETs. Each device can be programmed over a 100kHz to 500kHz frequency range and the part can be synchronized to an external clock. The error amplifier is a true op amp, allowing a wide range of compensation networks. The LT1952/LT1952-1 are available in a small 16-pin SSOP package.Applications Telecommunications Power Supplies Industrial and Distributed Power Isolated and Non-Isolated DC/DC Converters

Demonstration circuit 1320 is a high power density step-down DC/DC converter featuring the LTC3608EWKG (DC1320A-A) or the LTC3609EWKG (DC1320A-B) high current, high input voltage monolithic DC/DC step-down converter. The input voltage of the DC1320A-B is from 5V to 28V and it provides a jumper-selectable output voltage of 1.5V, 1.8V, 2.5V, or 3.3V @ 6A.

The ADM7172 is a CMOS, low dropout linear regulator (LDO) that operates from 2.3 V to 6.5 V and provides up to 2 A of output current. This high output current LDO is ideal for regulation of high performance analog and mixed-signal circuits operating from 6 V down to 1.2 V rails. Using an advanced proprietary architecture, the device provides high power supply rejection and low noise, and achieves excellent line and load transient response with just a small 4.7 ?F ceramic output capacitor. Load transient response is typically 1.5 ?s for a 1 mA to 1.5 A load step.The ADM7172 is available in 17 fixed output voltage options. The following voltages are available from stock: 1.3 V, 1.8 V, 2.5 V, 3.0 V, 3.3 V, 4.2 V, and 5.0 V. Additional voltages that are available by special order are: 1.5 V, 1.85 V, 2.0 V, 2.2 V, 2.7 V, 2.75 V, 2.8 V, 2.85 V, 3.8 V, and 4.6 V. An adjustable version is also available that allows output voltages that range from 1.2 V to VIN ? VDO with an external feedback divider.Inrush current can be controlled by adjusting the start-up time via the soft start pin. The typical start-up time with a 1 nF soft start capacitor is 1.0 ms.The ADM7172 regulator output noise is 5 ?V rms, independent of the output voltage. The ADM7172 is available in an 8-lead, 3 mm ? 3 mm LFCSP, making it not only a very compact solution, but also providing excellent thermal performance for applications requiring up to 2 A of output current in a small, low profile footprint.Applications Regulation to noise sensitive applications: ADC and DAC circuits, precision amplifiers, PLLs/VCOs, and clocking ICs Communications and infrastructure Medical and healthcare Industrial and instrumentation

The ADM8641 and ADM8642 are simple voltage detectorssuitable for use in general-purpose applications. The ultralowpower consumption of these devices makes them suitable forpower efficiency sensitive systems, such as battery-poweredportable devices and energy meters.The factory preset detection thresholds from 0.5 V to 4.63 Vwith ?1.2% accuracy over the full temperature range enable thedevices to monitor the node of interest accurately with directcontact. The DIS input lets the user hold the output lowregardless of the state of the input. Not all device options arereleased for sale as standard models. See the Ordering Guidesection for full information.The ADM8641 monitors the voltage using the VCC pin. Theseparate supply pin on the ADM8642 allows it to have a lowerdetection threshold down to 0.5 V.The ADM8641 and ADM8642 are available in a 6-ball, 1.46 mm ?0.96 mm WLCSP. These devices are specified over the ?40?C to+85?C temperature range.APPLICATIONS Portable/battery-operated equipment Microprocessor systems Energy metering Energy harvesting

The ADP1031 is a high performance, isolated micropowermanagement unit (PMU) that combines an isolated flybackdc-to-dc regulator, an inverting dc-to-dc regulator, and abuck dc-to-dc regulator, providing three isolated power rails.Additionally, the ADP1031 contains four, high speed, serialperipheral interface (SPI) isolation channels and three general-purpose isolators for channel to channel applications where lowpower dissipation and small solution size is required.Operating over an input voltage range of +4.5 V to +60 V, theADP1031 generates isolated output voltages of +6 V to +28 V(adjustable version) or+ 21 V and +24 V (fixed versions) forVOUT1, factory programmable voltages of +5.15 V, +5.0 V, or+3.3 V for VOUT2, and an adjustable output voltages of ?24 V to?5 V for VOUT3.By default, the ADP1031 flyback regulator operates at a 250 kHzswitching frequency and the buck and inverting regulators operateat 125 kHz. All three regulators are phase shifted relative to eachother to reduce electromagnetic interference (EMI). The ADP1031can be driven by an external oscillator in the range of 350 kHzto 750 kHz to ease noise filtering in sensitive applications.The digital isolators integrated in the ADP1031 use AnalogDevices, Inc., iCoupler? chip scale transformer technology,optimized for low power and low radiated emissions.The ADP1031 is available in a 9 mm ? 7 mm, 41-lead LFCSP andis rated for a ?40?C to +125?C operating junction temperaturerange.Applications Industrial automation and process control Instrumentation and data acquisition systems Data and power isolation

The?ADP1047?/ ADP1048 are digital power factor correction (PFC) controllers that provide accurate input power metering capability and inrush current control for ac/dc systems. The ADP1047 is designed for single phase PFC applications; the ADP1048 is designed especially for interleaved and bridgeless PFC applications.The digital PFC function is based on a conventional boost PFC with multiplication of the output voltage feedback combined with the input current and voltage to provide optimum harmonic correction and power factor for ac/dc systems. All signals are converted into the digital domain to provide maximum flexibility; all key parameters can be reported and adjusted via the PMBus? interface. The ADP1047 / ADP1048 allow users to optimize system performance, maximize efficiency across the load range, and reduce design time to market.The ADP1047 / ADP1048 provide accurate rms measurement of input voltage, current, and power. This information can be reported to the microcontroller of the power supply via thePMBus interface.APPLICATIONS AC/DC power supplies for applications Computing Server & Storage Network and communication infrastructure Industrial and Medical