Power ICs
1.2A(IOUT), 1.5MHz High Input Voltage Switching Regulator with Programmable Output Current Limit
Linear Technology has announced the LT3663, a 1.2A, 1.5MHz monolithic current mode step-down switching regulator with a programmable output current limit. Its wide operating input voltage of 7.5V to 36V makes the LT3663 ideal for a variety of input sources, including unregulated 12V wall adapters, 24V industrial supplies, Fire Wire, as well as automotive applications. Onboard input overvoltage lockout protects the device through input transients as high as 60V, such as those commonly found in automotive applications.
New Vishay Siliconix 60-V SiM400 in 1-mm x 0.6-mm SOT-923 Delivers Space Savings for Small-Signal Applications
Vishay Intertechnology, Inc. today released a 60-V n-channel power MOSFET in the tiny SOT-923 package that will provide dramatic space savings over devices in larger packages such as the SC-70 and SC-89.
4MHz, 3A Synchronous Step-Down Regulator Now Offered in High Reliability, MP-Grade Temperature Range
Linear Technology has announced the high reliability, MP-grade version of the LTC3412A. The LTC3412A is a high efficiency, 4MHz synchronous buck regulator that uses a constant frequency, current mode architecture. It can deliver up to 3A of continuous output current at voltages as low as 0.8V from a thermally enhanced TSSOP-16 package. It operates from an input voltage range of 2.25V to 5.5V, making it ideal for both single-cell Li-Ion, or NiMH applications, as well as more general purpose fixed rail systems.
Vishay Siliconix - 12-V P-Channel TrenchFET® Gen III Power MOSFET Offers Industry’s Lowest On-Resistance From 27 mΩ at 4.5 V to 130 mΩ at 1.5 V in Ultra-Small 1.6-mm by 1.6-mm Footprint Area
Vishay today introduced a new 12-V p-channel TrenchFET Gen III power MOSFET with the industry's lowest on-resistance for a p-channel device in the thermally enhanced PowerPAK® SC-75, which features a 1.6-mm by 1.6-mm footprint area.
30A to 45A PowerBridge Rectifier Series with 600-V to 1000-V VRRM and 1500-V Dielectric Strength
Vishay introduces a new series of enhanced high-current-density PowerBridge rectifiers with current ratings of 30 A to 45 A, maximum peak reverse voltage ratings of 600 V to 1000 V, and a high case dielectric strength of 1500 V. The series' 45-A devices are the industry's first single in-line bridge rectifiers in the PowerBridge package, which features a body size of 30 mm by 20 mm with a 3.8-mm profile.
Intersil's 2A and 3A linear regulators provide industry's fastest transient response, lowest dropout and highest total DC accuracy
Intersil has introduced the ISL80102 and ISL80103, a pair of low voltage, high current, low dropout linear regulators (LDOs), specified at 2A and 3A output current respectively. While most LDOs in the market are based on decades old technology, these parts utilize state-of-the-art BiCMOS technology to achieve new levels of performance. The LDOs provide the industry's fastest transient response, which ensures that the output voltage is properly regulated under varying load current changes. They also feature very low dropout, 120mV dropout at 3A and 81mV dropout at 2A.
Flyback Controller Operates at 150°C Junction Temperature
Linear Technology has announced the H-grade version of the LTC3803-3, a current mode flyback DC/DC controller in a tiny 6-pin ThinSOT™ package. This H-grade device is guaranteed up to +150°C operating junction temperature and is ideal for automotive and industrial applications subjected to high ambient temperatures. The LTC3803H-3 can be powered from an input voltage ranging from 9V to 75V through a series resistor clamped with the device's internal shunt regulator. The controller is well suited for 4:1 input voltage range isolated applications commonly found in 12V and 42V automotive requirements.
Silicon Labs' New AC Current Sensors Replace Bulky Transformers
Expanding its popular ISOpro isolation product portfolio, Silicon Laboratories Inc. has introduced a next-generation ac current sensor family that replaces traditional current transformers. Silicon Labs' new Si85xx ac current sensors provide up to 5 kVrms of electrical isolation to ensure safety compliance for a variety of critical power delivery systems such as ac-dc switching power supplies, isolated dc-dc supplies, motor control applications and electronic lighting ballasts.
Renesas Technology Announces 12-Product Lineup of Energy-Efficient Low-Loss Power MOSFETs Covering Wide Voltage Tolerance Range for Isolated DC-DC Converters and Low Power Inverters
Renesas Technology Europe today announced a lineup of 12 10th generation power MOSFET products for isolated DC-DC converters*1 used in the power supplies of applications such as servers, communications equipment, and industrial equipment. The new power MOSFETs deliver reduced switching loss*2 for improved energy efficiency and cover a wide voltage tolerance range (40 V, 60 V, 80 V, 100 V). Mass production started on December 3, 2009.
Analog Devices’ RMS Power Detector Offers Communications Customers Best-In-Class Power Management Device for 3G and 4G Mobile Terminals
Analog Devices, Inc. today announced the expansion of its industry-leading TruPwr RF power detector product family with the introduction of a new integrated device for 3G and 4G mobile terminals. The ADL5504 is a highly accurate, easy-to-use means of determining the RMS (root mean square) power of complex waveforms. It can be used for power measurements of both simple and complex waveforms and is particularly useful for measuring high crest factor (high peak-to-RMS ratio) signals, such as W-CDMA, CDMA2000, WiMAX, WLAN and LTE waveforms. It is also effective for optimizing the performance of linear power amplifiers. Furthermore, the ADL5504's temperature stability and waveform independence offer best-in-class accuracy at levels up to five times better than competitive devices, significantly increasing efficiency, battery life and signal quality.
Industry’s Smallest Dual Buck Regulator Reduces Component Count and Board Space in Portable Systems
Analog Devices, Inc. today introduced the industry's smallest dual buck (step-down) regulator for space-constrained portable electronic systems. At just 2 mm × 2 mm × 0.6 mm, the dual 600-mA (milliamp) ADP5022 high performance step-down converter is half the size of competing devices yet includes an additional 150-mA on-chip LDO (low dropout regulator), a convenient feature for powering auxiliary rails. The high level of integration and small package size enables a cost-effective, ultra-small, power management unit for portable instruments, smart energy meters, smart phones and other power-sensitive equipment that requires thin packages. The combination of small size, low-noise architecture and high switching frequency also make the ADP5022 ideal for powering sensitive analog circuits like high-resolution ADCs (analog-to-digital converters).
Drive up to Eight Channels of Ten 100mA LEDs
Linear Technology announces the LT3760, an 8-channel LED driver, utilizing a step-up DC/DC controller capable of driving up to a 45V string of 100mA LEDs per channel. Its internal 60V, 1MHz DC/DC boost mode controller is designed to operate as a constant current LED driver for up to 80 white LEDs. From a 12V input, the LT3760 can drive 8 channels, each with up to ten 100mA white LEDs in series while delivering efficiencies exceeding 92%. Its multichannel capability makes it ideal for medium and large-sized TFT-LCD backlighting applications. Its input voltage range of 6V to 40V makes it ideal for automotive, avionic, HDTV and industrial display applications.
ON Semiconductor Launches Automotive-Qualified Self Protected Low-Side Driver ICs
ON Semiconductor today introduced a family of low-side protected MOSFETs that feature high levels of integrated protection. Qualified in accordance with the AEC-Q101 standard, devices in the NCV840x family are ideal for use in switching applications operating in harsh automotive and industrial environments.
Imec presents new GaN-on-Si architecture for enhancement mode power switching devices
At this weeks International Electron Devices Conference, the nanoelectronics research center imec presents an innovative, simple and robust GaN-on-Si double heterostructure FET (field effect transistor) architecture for GaN-on-Si power switching devices. The architecture meets the normally-off requirements of power switching circuits and is characterized by low leakage and high breakdown voltage, both essential parameters to reduce the power loss of high-power switching applications.
STMicroelectronics Reinforces Leadership in Ultra-Efficient MOSFETs with Extra Super-Junction Device Supporting Industry’s Lowest On-Resistance Per Die Area
STMicroelectronics has added further options for designers using its ultra-efficient MDmesh V power MOSFETs, with a new device in the industry-standard TO-247 size package that delivers the industry's lowest on-state resistance for 650V MOSFETs.
TI introduces fully-integrated load switch with lowest ON resistance
Texas Instruments has introduced a fully-integrated load switch with typical ON resistance (rON) of 5.7-mW at 3.6-V, four times lower than the nearest competitor. TI's TPS22924C integrates at least four parts into one to simplify subsystem load management.
32V Monolithic Li-Ion/Polymer Battery Chargers Deliver up to 2A in Compact 9mm2 Package
Linear Technology has introduced the LT3650-4.1 and LT3650-4.2, compact, monolithic high-voltage battery chargers for single-cell Li-Ion/Polymer batteries. The device's switchmode architecture minimizes power dissipation without compromising board space. The LT3650-4.1/4.2 operates from 4.75V to 32V and has a 40V absolute maximum rating for added system margin. User selectable timer or C/10 termination requires no external microcontroller and simplifies the design.
austriamicrosystems introduces new “Eco” high speed linear regulator optimized for variable load currents
austriamicrosystems has expanded its low drop out regulator portfolio with the AS1367 "Eco" LDO, capable of delivering up to 150mA at its regulated output.
Battery Stack Fault Monitor Provides Independent Supervision of High Voltage Li-Ion Strings
Linear Technology announces the LTC6801, a high voltage battery stack fault monitor that operates without a microprocessor, and without the need for optocouplers or isolators. An LTC6801 can monitor up to 12 series-connected battery cells for overvoltage and undervoltage conditions. Multiple LTC6801 devices can be daisy chained, providing a method to monitor each individual cell in very long battery strings. When connected in a daisy-chain, a single differential clock output confirms that all cells in the stack are within the defined operating range.
ROHM MOSFETs Handle Reduced Supply Voltages in Portables
The new ECOMOS series of P-channel and N-channel MOSFETs from ROHM Semiconductor are designed to meet the prescribed operation at lower gate drive voltages that emerging generations of portable electronic devices require.
37VIN, 1.2A, 2.5MHz Step-Down DC/DC Converter Withstands 55V Transients
Linear Technology Corporation announces the LT3686, a 1.2A, 37VIN step-down switching regulator. The LT3686 operates within a VIN range of 3.6V to 37V with overvoltage lockout, protecting the regulator and load from transients as high as 55V, making it ideal for load dump and cold-crank conditions commonly found in automotive applications as well as 24V industrial supplies. Its internal 1.85A switch can deliver up to 1.2A of continuous output current at voltages as low as 0.8V. Its low minimum on-time enables it to offer high switching frequencies even with high step-down ratios. For example, with an input as high as 16V, it can deliver a 3.3V output using a 2MHz switching frequency.
Fairchild Semiconductor’s PWM Controllers Improve Efficiency at Light Load
Fairchild Semiconductor has developed a portfolio of pulse-width modulated controllers, which enable notebook power-supply designers to meet the stringent international energy-saving regulations. These include the ENERGY STAR External Power Supply (EPS) version 2.0 requirement that mandates 87 percent average active-mode efficiency to obtain compliance.
IR’s IR11672A SmartRectifier IC Delivers Greater Protection and Higher System Efficiency for AC-DC Power Converters
International Rectifier today introduced the IR11672A SmartRectifier IC with advanced Minimum On Time (MOT) protection circuitry for energy-efficient AC-DC power converters for laptops, LCD and PDP televisions, game consoles, and server and telecom Switch Mode Power Supplies (SMPS).
Ultra Flat Power Inductors from KOA
KOA expands its range of ultra flat power inductors. The PL inductor series with ferrite core features a maximum height of 0.5 mm. The new size 1008 inch (2520 metric) covers the inductor values from 0.33 µH up to 4.7 µH. Due to the very low ohmic DC resistance down to 0.06 Ω, the allowed current goes up to 1100 mA, despite its very small dimensions.
MAX9670/71: +3.3V Dual SCART ICs Save Power in Set-Top Boxes
Maxim Integrated Products introduces the MAX9670/MAX9671, +3.3V dual SCART solutions with audio volume control for set-top boxes and A/V receivers that have two SCART connectors. These devices utilize power-saving technologies to achieve the industry's lowest power consumption. Additionally, they integrate Maxim's patented DirectDrive(R) technology* to prevent click-and-pop noise and eliminate the need for costly AC-coupling capacitors on the audio outputs. At 49mm2 or smaller, the MAX9670/MAX9671 are the industry's smallest complete dual SCART solutions.
60VIN, 4A DC/DC µModule Regulator in 15mm x 15mm x 4.32mm Plastic Surface Mount Package
Linear Technology Corporation introduces the LTM8027, a 4A system-in-a-package DC/DC µModule® regulator capable of operating from a 60V supply without any input protection. The LTM8027 includes the inductor, power switches, switching regulator and all support components in a small 2.6g 15mm x 15mm x 4.32mm land grid array (LGA) plastic package. The device can regulate an output voltage ranging from 2.5V to 24V from an input supply of 4.5V to 60V (65V absolute maximum). The LTM8027's rugged voltage rating makes it a suitable voltage regulator for 12V and 24V automotive and heavy equipment such as industrial robotics, 48V telecom, as well as avionics and industrial control systems.
Ultralow Voltage 20mV Step-Up Converter & Power Manager for Energy Harvesting Applications
Linear Technology has announced the LTC3108, a highly integrated step-up DC/DC converter designed to start-up and run from extremely low input voltage sources such as thermoelectric generators (TEGs), thermopiles and small solar cells. Its self-resonant topology steps up from input voltages as low as 20mV. Small temperature differences can be harvested and used to generate system power instead of traditional battery power. Energy harvesters are designed for applications requiring very low average power, but require periodic pulses of higher load current. For example, in many wireless sensor applications the circuitry is only powered to take measurements and transmit data periodically at low duty cycle.
Battery Charger Controllers in Compact 16mm2 Package Require No Blocking Diode
Linear Technology has introduced the LTC4012, LTC4012-1 and LTC4012-2, fast-charge 4A capable high efficiency switchmode battery charger controllers for multiple battery chemistries. The LTC4012 supports Li-Ion/Polymer, NiMH, NiCd and sealed lead acid battery chemistries in single and multicell configurations.
300mA High Speed, Low Noise CMOS LDO in 1mm x 1mm Package
Available in the tiny USPQ-4 package (1.0 x 1.0 x 0.4mm), as well as in standard SSOT-24, SOT-25 and SOT-89-5 versions, the new XC6223 Series of voltage regulators from Torex Semiconductor offer ultra fast load transient response performance, PSRR is 80dB @ 1kHz, as well as protection against inrush current. These fast, low dropout voltage regulators provide a highly stable, low noise supply that meets the demands of most battery-driven circuits.
austriamicrosystems introduces high efficiency 200mA DC-DC step-up converter with buck function
austriamicrosystems complements its DC-DC product portfolio with the introduction of a 200mA boost converter. The topology of the AS1337 provides an innovative step down function enabling buck-boost functionality. With a continuous transition between boost and regulated buck mode the AS1337 is ideal for single for dual cell applications.
Step-Down DC/DC Converter with Only 2.8µA Quiescent Current
Linear Technology Corporation announces the LT3991, a 1.2A, 55V step-down switching regulator with an integrated boost diode. Its Burst Mode® operation keeps quiescent current under 2.8µA in no load standby conditions. The LT3991's 4.3V to 55V input voltage range makes it ideal for automotive and industrial applications. Its internal 1.7A switch can deliver up to 1.2A of continuous output current to voltages as low as 1.19V.
Vishay Siliconix 20-V P-Channel TrenchFET MOSFET Offers Industry’s Lowest On-Resistance
Vishay today introduced a new 20-V p-channel power MOSFET with the lowest on-resistance ever achieved for a p-channel device in the compact 2-mm by 2-mm footprint area of the thermally enhanced PowerPAK SC-70. The new SiA433EDJ is the newest product built on TrenchFET® Gen III p-channel technology, which uses self-aligning process techniques to pack one billion transistor cells into each square inch of silicon. This leading-edge technology allows a superfine, sub-micron pitch process that cuts the industry's best on-resistance for a p-channel MOSFET nearly in half.
LT3582 - Boost & Inverting DC/DC Converter for Active Matrix OLED & CCD Bias
Linear Technology has announced the LT3582, LT3582-5 and LT3582-12 dual channel DC/DC converters which deliver both positive and negative outputs required in many biasing applications such as active matrix OLED (organic light-emitting diode) displays as well as CCD (charge coupled device) applications. The LT3582/-5/-12 offer an I2C interface that can dynamically program output voltages, power sequencing and output voltage ramps as the application requires. Alternatively, these parameters can be set in manufacturing and made permanent via the built in non-volatile OTP (one time programmable) memory. The LT3582's positive output voltage can be set between 3.2V and 12.775 in 25mV steps, whereas the negative output can be set between -1.2V and -13.95V in 50mV steps. The LT3582-5 and LT3582-12 are preconfigured with ±5V and ±12V outputs respectively, useful in many signal conditioning applications.
High Efficiency Quad PSE Controller Addresses IEEE 802.3at PoE+ Standard
Linear Technology has introduced the LTC4266, a 4-port Power over Ethernet (PoE) controller for Power Sourcing Equipment (PSE) required to provide IEEE 802.3at (25.5W) or proprietary higher power levels. Next-generation PoE applications call for more power to support demanding features, while increasing power efficiency in an effort to be more green and reduce costs. The LTC4266 provides up to 100W over 4-pair Ethernet cabling and is fully compliant with the new IEEE 802.3at PoE+ standard and backward compatible with the prior IEEE 802.3af PoE standard. To help conserve power, the LTC4266 delivers the lowest-in-industry heat dissipation by using low RDS(ON) MOSFETs and 0.25Ohm sense resistors, eliminating the need for expensive heat sinks and providing a more robust PSE solution.
IGBT modules have internal inductance of just 15nH
SEMIKRON has introduced a low-inductance 1200V SEMITRANS IGBT module series for use in AC/DC converters in the 20 – 300kW power range. These modules are available with Fuji fifth-generation V-IGBT chips as an alternative to IGBT4 chips. The very low 15nH module inductance offers two advantages: 50V higher DC link voltage than in competitor modules, thanks to the lower switching overvoltages; plus faster and softer IGBT switching producing lower switching losses, boosting overall efficiency.
38V, 2MHz Step-Down DC/DC Converter at Only 2.8µA Quiescent Current
Linear Technology has announced the LT3971, a 1.2A, 38V step-down switching regulator with an integrated boost diode. Its Burst Mode operation keeps quiescent current under 2.8µA in no load standby conditions. The LT3971's 4.3V to 38V input voltage range makes it ideal for automotive and industrial applications. Its internal 2.4A switch can deliver up to 1.2A of continuous output current to voltages as low as 1.19V.
Diodes Inc - Higher current power switches optimized for USB
For higher current applications Diodes Incorporated has added two new devices to its AP21XX power switch product line. The single channel AP2101 and AP2111 provide a continuous output current capability up to 2A and have been optimized for use in self-powered and bus-powered USB and other 3-5V hot-swap applications.
MB39A145 - Fujitsu Announces Fast Transient Response DC/DC Converter IC
Fujitsu Microelectronics Europe today announced a new two-channel DC/DC converter IC with fast transient response times, for use in digital products, such as LCD TVs, and digital video recorders. The MB39A145 utilises a 'bottom detection comparator method', and includes new comparator circuits that provide changes in voltage for changes in current to realise a more stable, low ripple output voltage. This improved stability subsequently reduces the number of external components that are needed, such as condensers, thus reducing space. The IC also includes Pulse Frequency Modulation (PFM) that operates in currents below 100mA, enabling the IC to provide high efficiency in all current ranges and reduce the power consumption of end equipment in stand-by mode.
Small Footprint 4V-38V Input Voltage Range Synchronous Step-Down DC/DC Controller
Linear Technology has announced the LTC3854, a tiny 2mm x 3mm DFN-12 packaged, wide input voltage range synchronous step-down switching DC/DC controller that drives all N-channel power MOSFET stages. The 4V to 38V input range addresses a wide variety of applications, including most intermediate bus voltages and battery chemistries. The strong on-board MOSFET gate drivers enable high power external MOSFETs to produce output currents up to 20A with output voltages ranging from 0.8V to 5.5V. This makes the LTC3854 ideal for point-of-load regulation requirements in datacom, telecom, industrial, automotive, medical and multi-function printer applications.
AS1371 - austriamicrosystems introduces 400mA low input voltage ultra low dropout regulator
austriamicrosystems has expanded its ultra low dropout regulator (LDO) portfolio with the AS1371; capable of delivering up to 400mA while operating down to a low input voltage of 1.2V.
