Power ICs
1V to 16V hot-swap IC with precision current-sense output
Maxim introduced the MAX5977, a hot-swap controller for 1V to 16V backplanes. This device features an integrated current-sense amplifier that provides a 1% accurate current output over a 10mV to 50mV input voltage range. This allows system designers to precisely monitor/measure load current in high-availability systems. A calibration mode allows the current-sense amplifier to be fine-tuned for production testing of the design. The MAX5977 is well suited for networking, base station, storage, and computer server line cards requiring high reliability and precision current monitoring.
Cree Launches Industry’s First Commercial Silicon Carbide Power MOSFET; Destined to Replace Silicon Devices in High-Voltage (≥ 1200-V) Power Electronics
Cree, Inc. has introduced the industry's first fully qualified commercial silicon carbide power MOSFET. This establishes a new benchmark for energy-efficient power switches and can enable design engineers to develop high-voltage circuits with extremely fast switching speeds and ultralow switching losses.
Compact N-channel power MOSFETs with 40 percent FOM index improvement
MSC now offers the new NP75N04YUK N-channel power MOSFET from Renesas Electronics. Key features of this device are the capability to handle current flows up to 75 A and an on-resistance of only 3.3 mΩ. The NP75N04YUK comes in a compact HSON-8 package with external dimensions of 6 mm x 5.15 mm.
500-mA LDOs Double the Power Rejection of Competing Devices to Improve Portable and Battery-powered Equipment Performance
Analog Devices introduced two low-quiescent-current LDOs (low-dropout linear regulators) that deliver outstanding supply-rejection performance to help battery-operated portable equipment run longer and more efficiently. The new ADP124 and ADP125 LDOs have excellent PSRR (power-supply-rejection ratio) performance of 60 dB at 100 kHz, which is twice that of the nearest competing LDOs, and achieve low noise of 35 µVrms (micro-volts per root mean squared) at 1.8 V output. Operating from an input voltage between 2.3 V and 5.5 V and providing up to 500 mA of output current down to a 0.8 V output, the new LDOs also feature a low quiescent current of 210 μA and a 130 mV dropout voltage at a 500 mA load, which further improves portable equipment operating efficiency over a wide input-voltage range.
Dual Output Synchronous Step-Down DC/DC Controller with Digital Power System Management via I2C/PMBus Interface & Onboard EEPROM
Linear Technology announced the LTC3880/-1, a dual output high efficiency synchronous step-down DC/DC controller with I2C-based PMBus interface for digital power system management. The device combines best in class analog switching regulator performance with precision mixed signal data conversion for unsurpassed ease of power system design and management, supported by the LTpowerPlay software development system with easy-to-use graphical user interface (GUI).
Vishay - Four 45 V TMBS Trench MOS Barrier Schottky Rectifiers for Solar Bypass Applications in SMPC and Axial-Leaded Packages
Vishay today expanded its TMBS Trench MOS Barrier Schottky rectifiers for solar bypass applications with four new 45 V devices offering eSMP® surface-mount and axial-leaded package options. The devices released today are designed to enable higher current densities in low-voltage, high-frequency inverters, and solar cell junction boxes, where they will be used as bypass diodes for photovoltaic solar cell protection.
Nat Semi Adds Three High Output Voltage Products to SIMPLE SWITCHER Power Module Family
National Semiconductor introduced three new SIMPLE SWITCHER® power modules, the first to drive high output voltage applications in a variety of markets including industrial, communications infrastructure and military. The easy-to-use LMZ14201H, LMZ14202H and LMZ14203H power modules provide the efficiency of a synchronous switching regulator with the simplicity of a linear regulator, eliminating the external inductor and complex layout placement challenges typical of switching regulator designs.
Power Integrations’ TOPSwitch-JX Power Conversion ICs Now Available in Low-Profile, Thermally Efficient, Surface-Mount Package
Power Integrations announced the availability of its industry-leading TOPSwitch-JX power conversion IC in an innovative eSOP low-profile power package. This slender new surface-mount package is suited for applications without heatsinks up to 65 W in compact, open-frame installations such as slim LCD TV auxiliary power, set-top boxes, PC standby, and DVD players. In notebook, netbook, and printer adapters, the thermally efficient eSOP package can supply up to 40 W using only the PCB for thermal management.
400mA Synchronous Step-Up DC/DC Converter with Maximum Power Point Control & 250mV Start Up for Energy Harvesting Applications
Linear Technology has announced the LTC3105, a high performance, synchronous boost converter that incorporates maximum power point control (MPPC) and starts up with inputs as low as 250mV. The LTC3105 operates over an extremely wide input range of 0.2V to 5V, making it ideal for harvesting energy from high impedance alternative power sources, including photovoltaic cells, thermoelectric generators (TEGs) and fuel cells. The LTC3105's internal 400mA synchronous switches maximize efficiency while its Burst Mode operation offers quiescent current of only 22uA, further optimizing converter efficiency overall operating conditions. A user-programmable MPPC set point maximizes the energy that can be extracted from any power source without collapsing its internal voltage.
Rectifiers from Diodes Incorporated increase efficiency and reduce form factor
Diodes has expanded its portfolio of patented Super Barrier Rectifiers (SBR) with the introduction of 12A and 15A rated devices in the compact PowerDI5 package. As the output rectifiers in space limited SMPS design, the SBRs are characterized by an ultra low forward voltage drop that delivers better efficiency and cooler operation than standard Schottky rectifiers.
Renesas Electronics Introduces Power MOSFETs with Compact Package and Improved Performance for Automotive Applications
Renesas introduced today 32 new N-channel power metal-oxide-semiconductor field-effect transistors (MOSFETs) with voltage tolerances of 40 and 55 volts (V). The new power MOSFETs include the NP75N04YUK device, featuring a compact HSON package with one-half the mounting area of the existing TO-252 package and the ability to handle current flows of up to 75 amperes (A).
High-voltage power MOSFET with ultra-low on resistance provides low power consumption
MSC now offers the new RJK60S5DPK high-voltage power MOSFET von Renesas Electronics. Key features of this device are an ultra-low on-resistance of 150 mΩ and a gate-drain charge capacitance (Qgd) of only 6 nC at 10 A maximum current (ID) and 10 VGSS voltage tolerance.
60V Synchronous Step-Down DC/DC Controller Specified up to 150°C
Linear Technology Corporation introduces the LTC3810H-5, a high input voltage synchronous step-down DC/DC controller with guaranteed specifications for junction temperatures as high as 150°C.
MAX14566E: Compact charger identification switch supports USB, Apple, and CCSA YD/T charging
Maxim introduced the MAX14566E, a USB charger identification solution that supports the charging of portable devices from notebook computers, even when the computer is in sleep or hibernate mode. This switch supports the USB Battery Charging Specification, Revision 1.1, as well as the CCSA YD/T 1591-2006 standard for the Chinese market. The compact (2mm x 2mm) MAX14566E saves board space and reduces software overhead as compared to discrete implementations.
MAX15040: 4A switching regulator simplifies designs and improves reliability
Maxim introduced the MAX15040, a low-voltage (2.4V to 3.6V), synchronous switching regulator in a 2mm x 2mm wafer-level package (WLP). This miniature step-down regulator integrates MOSFETs to simplify design, minimize EMI, improve reliability, and save board space.
High Precision, Voltage Detector, with built in Delay and Manual Reset function
Introducing the XC6127 from Torex; this new family of Voltage Detectors utilises a newly revised internal circuit which offers improved Temperature Characteristics (±50ppm/degC) and higher accuracies with a tolerance of ±0.8% now standard.
Semtech Expands Efficient, High-Performance EcoSpeed Regulator Platform with 24V, 3A Device
Semtech has expanded its efficient, high-performance EcoSpeed regulator platform to include a 3A output current device with a wide input voltage range from 5.5 to 24V. The new SC410 joins Semtech's existing platform of EcoSpeed converters, which includes a broad selection of output current capabilities ranging from 3A to 30A. The wide input voltage range of the SC410 makes it ideal for use with lithium ion battery packs and charging adapters or regulated 12V or 18V main power supply rails in embedded applications for industrial, networking/communications, office automation and higher-end consumer digital electronic products.
Renesas Electronics Introduces New High-Voltage Power MOSFET Product with Approximately 52 Percent Lower Loss
Renesas today announced the availability of a new high-voltage N-channel power metal-oxide-semiconductor field-effect-transistor (MOSFET) product, the RJK60S5DPK, for power supply units. The new power MOSFET delivers high efficiency and low power consumption for PC servers, communication base stations, and solar power generation systems.
High current gate driver minimises switching losses
The ZXGD3005E6 10 Amp gate driver from Diodes Incorporated has been designed to ensure ultra fast switching of power MOSFET and IGBT loads in power supply, solar inverter and motor drive circuits. With its emitter follower configuration delivering propagation delay times of less than 10ns and rise and fall times of less than 20ns, this non inverting gate driver will reduce switching losses, simplify circuit design and improve overall system reliability.
Torex - XC6505, 10.5V High Speed Low IQ 200mA LDO with Extended Temperature Range
The new XC6505 series from Torex is a 10.5V LDO that combines the best of both worlds, being high speed (its PSRR is 60dB @1kHz) while consuming only 5.5µA. The XC6505 operates with input voltages from 1.7V to 10.5V over the extended -40~+105°C temperature range, can deliver output currents up to 200mA and is readily available with fixed output voltages from 1.5V to 8.0V in 0.1V increments.
Synchronous Boost Controller with up to 98% Efficiency Eliminates Heat Sink
Linear Technology has announced the LTC3786, a synchronous step-up DC/DC controller that replaces the boost diode with a high efficiency N-channel MOSFET. This eliminates the heat sink normally required in medium to high power boost converters. In applications where the input voltage may exceed the regulated output voltage, the LTC3786 is able to keep the synchronous MOSFET on continuously so that the output voltage follows the input voltage with minimal power loss. The LTC3786's low 55µA quiescent current extends the run time in battery-powered applications when in standby mode. This controller can produce a 24V at 5A output from a 12V input with up to 98% efficiency, making it ideal for automotive, industrial, and medical applications where a step-up DC/DC converter must have low heat dissipation in a small solution size.
Intersil's Latest Dual Synchronous Buck Regulators Provide Design Flexibility, Deliver 95% Peak Efficiency to Maximize Battery Life
Intersil has expanded its popular family of dual output integrated FET buck regulators, introducing a trio of new devices that provide up to 95% power conversion efficiency and offer designers greater flexibility. The new ISL8022, ISL8033/A and ISL8036/A have quiescent currents as low as 40uA and support an input voltage range of 2.85V to 6V, making them ideal for single Li+ cell, three NiMH cell or 3V/5V DC input voltage applications.
Nuvoton Introduces Low RDSON Power Distribution Switch IC with Soft-start and Output Discharge –NCT3521U/U-2
Nuvoton Technology Corp. introduces low RDSON with soft-start and output discharge power distribution switch– NCT3521U/U-2. The power switch provides continuous 2.0Amp output current, 80m-ohm RDSON and equips over current, short circuits, reverse current, reverse voltage protections and thermal shutdown which can secure the system from damage while power on/off shorted.
Analog Devices Adds Dual Output Synchronous Controller to Power Management Portfolio
Analog Devices announced today the availability of the ADP1850 synchronous DC-to-DC switching controller that is easily configurable as dual output or interleaved two-phase controller for a wide range of high-current, high-efficiency applications. The ADP1850 offers more flexibility than other DC-to-DC controllers by providing a wider input voltage range of 2.75 V to 20 V, as well as easy configuration for dual-output (up to 2 x 25 A) or single interleaved-output (up to 50 A) systems. The ADP1850 provides accurate tracking capability between supplies and includes independent, precision ENABLE and accurate POWER_GOOD functions that allow simple, precise, and accurate daisy-chain sequencing between channels or another device – an important feature for powering multi-input voltage FPGA, DSP and ASIC devices.
100V Isolated Flyback DC/DC Controller Operates up to 150°C
Linear Technology has announced the LT3748H, a high input voltage isolated flyback DC/DC controller with guaranteed operation for junction temperatures as high as 150°C. This device significantly simplifies the design of an isolated DC/DC converter since there is no requirement for an opto-isolator, third winding or signal transformer for feedback, as the output voltage is sensed from the primary-side flyback signal. The LT3748 operates over a 5V to 100V input voltage range and drives an external N-channel power MOSFET, making it well suited for a wide variety of automotive, industrial, telecom and datacom applications.
International Rectifier Expands Portfolio of 40 V to 100 V Automotive Qualified MOSFETs Including Family of Logic Level Gate Drive Devices
International Rectifier has expanded its offering of 40 V to 100 V automotive qualified MOSFETs including a family of logic level devices. The new MOSFETs are suitable for heavy load applications used in traditional Internal Combustion Engine (ICE) platforms and micro and hybrid vehicle platforms.
Self-protected MOSFETs from Diodes Incorporated raise protection levels for inductive loads
Diodes Incorporated has announced further additions to its IntelliFET range of self-protected MOSFETs. The 60V, 75m? (typical) rated single N-channel ZXMS6006DG/SG and dual N-channel ZXMS6006DT8 provide thermal shutdown, short circuit, over voltage, over current and input ESD protection facilities enabling circuit designers to dramatically increase circuit reliability. Suiting automotive and industrial applications, these self-protected MOSFETs are ideal for switching inductive loads, such as motors, relays and lamps at low frequencies.
TI introduces Green Rectifier controller for 5-V power supplies
Texas Instruments introduced a new power management controller and driver for standard and logic-level N-channel MOSFETs used for low-voltage, secondary-side synchronous rectification. The UCC24610 Green Rectifier™ controller improves power supply efficiency as much as five percent, and reduces primary-side power loss in 5-volt AC/DC adapters and bias supplies.
60V Input Synchronous Step-Down DC/DC Controller Draws Only 50µA in Battery-Powered Systems
Linear Technology has introduced the LTC3891, a high voltage synchronous step-down DC/DC controller that draws only 50µA in standby mode with the output in regulation. The 4V to 60V input supply range is designed to protect against high voltage transients, continue operation during automotive cold crank and cover a broad range of input sources and battery chemistries. The output voltage can be set from 0.8V to 24V at output currents up to 20 amps with efficiencies as high as 95%, making it well suited for 12V, 24V or 48V automotive, heavy equipment, industrial control, robotics and telecom applications.
Avago Extends Power Amplifier Gain Block Family with Frequency Range Optimized for Cellular Infrastructure
Avago announced two new gain block solutions that expand its high-performance power amplifier family targeting cellular infrastructure applications. The new MGA-31589 and MGA-31689 0.5-watt gain blocks feature high linearity, high gain, superior gain flatness and low power dissipation. The MGA-31589 gain block addresses cellular and WiMAX wireless base station and other wireless systems operating between 450 to 1500 MHz, while the MGA-31689 device addresses these applications operating between 1500 to 3000 MHz.
20 Years On - National Semiconductor's SIMPLE SWITCHER Products and Software Continue to Make Power Design Simple
National Semiconductor today marked the 20-year anniversary of its SIMPLE SWITCHER brand of products. Since 1990, electronic system engineers around the world have created designs featuring National's SIMPLE SWITCHER products, with over 1.5 billion units shipped to date. More than 100,000 engineers design power supplies with SIMPLE SWITCHER power modules, voltage regulators and controllers each year, with end applications spanning the entire electronics industry, from automotive to industrial.
Analog Devices - Isolated DC-to-DC Converter
Analog Devices (ADI) is expanding its portfolio of digital isolation products with the industry's smallest isolated dc-to-dc converter. Offering a 5-kV rms isolation rating in a 10-mm × 10-mm package, the ADuM6000 is a 0.5 watt device that integrates ADI's proprietary iCoupler digital isolation technology and isoPower dc-to-dc converter. The new digital isolator allows designers to free up valuable circuit-board real estate while eliminating the time-consuming step of securing medical or other safety approvals (such as IEC-60601-1), all at a fraction of the cost of alternative devices, including optocouplers. Safety is a key requirement in medical and industrial designs, and the ADuM6000 protects the device and end users from exposure to voltage levels that could compromise safety and reliability. Watch a video on the ADuM6000 digital isolators.
Cree - 650V Silicon Carbide Schottky Diodes Improve Advanced High-Efficiency Data Center Power Supply Designs
Targeting the latest data center power supply requirements, Cree, Inc. announced its new line of Z-Rec 650V Junction Barrier Schottky (JBS) diodes. The new JBS diodes provide blocking voltage to 650V to accommodate recent changes in data center power architecture that industry consultants estimate will result in energy efficiency gains of up to 5 percent. Because data centers account for nearly 10 percent of the world's annual consumption of electrical power, any efficiency gain represents a significant opportunity to reduce overall power consumption.
TI - Smallest, highest efficiency 6-A step-down SWIFT DC/DC converter
Texas Instruments builds upon its popular SWIFT family of power management integrated circuits with a new 6-A converter that is the industry's smallest and most efficient. The new TPS54618 monolithic synchronous switcher with two integrated 12-milliohm FETs provides 95-percent efficiency and low operating current to 2.95-V to 6-V point-of-load designs used in DSP- and FPGA-based communications, test and medical equipment.
LDOs from Diodes Incorporated extend battery life
Characterised by low dropout voltage and low quiescent current, the latest linear regulators from Diodes Incorporated suit low power handheld product design where extending battery life is a key design criteria. Dual fixed output devices, the 150mA AP7312 and 300mA AP7332 exhibit respective dropouts of 150mV and 300mV and typical quiescent current ratings of only 60µA.
Fairchild Semiconductor’s PFC/PWM Controller Provides Higher Efficiency in Dual-Switch Flyback Topologies
Power engineers, especially those involved in All-In-One (AIO) PC power, Slim Pack PC adapters, LCD TV and LED lighting designs, require a dual switch flyback topology that provides the higher efficiency and increased energy savings required by government regulations – something that LLC or single flyback solutions cannot provide. Developed to answer this need, Fairchild Semiconductor's FAN6920MR, an integrated critical mode PFC and quasi-resonant current mode PWM controller, meets regulatory requirements by providing >90 percent efficiency and <300mW at no load for increased power savings.
3A Output, 2MHz Synchronous Buck-Boost DC/DC Converter Offers Low Noise Operation & Extended Run Time from Batteries or Supercapacitors
Linear Technology LTC3113, a synchronous buck-boost converter that delivers 3A of output current from a nominal 3.3V power source, Li-Ion/Polymer battery or up to 1A from dual cell alkaline/NiCad/NiMH batteries. The LTC3113's 1.8V to 5.5V input range and 1.8V to 5.5V output range provides a regulated output from an input voltage above, below or equal to the output. The LTC3113 is also an ideal regulator solution to maximize the energy available from a two supercapacitor stack.
IR - MOSFET Chipset Tailored for Cost Sensitive DC-DC Applications
International Rectifier has introduced the IRF6708S2 and IRF6728M 30 V DirectFET® MOSFET chipset tailored for cost sensitive 19 V input synchronous buck applications. The IRF6708S2 Small Can and IRF6728M Medium Can devices reduce component count by 30 percent to drastically reduce overall system cost. The new DirectFET MOSFETs feature low charge and on-state resistance RDS(on) to minimize conduction and switching losses. The IRF6728M also features a monolithically integrated Schottky that reduces losses associated with body diode conduction and reverse recovery.
Linear constant current driver from Diodes Incorporated provides versatile control for LED applications
The AL8400 linear LED driver controller from Diodes Incorporated has been designed to tightly regulate a wide variation of high brightness LED currents via an external transistor. Suiting a broad range of LED chains in illumination, indication or signage systems, the controller can directly operate from 2.2V to 18V and will drive either N-channel MOSFET or NPN Bipolar transistors.
Single Inductor High Efficiency Synchronous Buck-Boost DC/DC Controller
Linear Technology announced the LTC3789, a very high efficiency (up to 98%) synchronous buck-boost DC/DC controller that operates from input voltages above, below or equal to the regulated output voltage. High power circuits that step-up and-down typically rely on transformers or two DC/DC converters, one for step-up (boost) and the other for step-down (buck) conversion. The LTC3789 operates using a single inductor with 4-switch synchronous rectification and can deliver output power up to 150W with a single device. Even higher output power can be achieved when multiple circuits are paralleled.
