Power ICs
18V Synchronous Step-Down Regulator from Linear Technology
The LTC3608 is a high efficiency, synchronous buck regulator that can deliver up to 8A of continuous output current at voltages as low as 0.6V. It operates from an input voltage range of 4V to 18V (20V ABS Max), making it ideal for applications with multicell Li-Ion, lead acid batteries or fixed voltage rails up to 15V.
LED driver IC offers high efficiency and fast switching
The A6210 from Allegro MicroSystems Europe is an LED driver IC based on a buck (stepdown) regulator circuit using constant 'on' time with valley current-mode control. This control scheme allows the use of very short switch 'on' times, making the new device ideal for applications requiring high switching frequencies combined with high input voltages and low output voltages.
NXP unveils suite of efficient power supply products
NXP Semiconductors has unveiled a suite of new power management solutions that will reduce power consumption in desktop PCs and laptops for the mass market. The highly efficient GreenChip PFC, GreenChip SR controllers and a portfolio of 30V power MOSFETs in LFPAK will be showcased at the Applied Power Electronics Conference (APEC) in Washington in February.
Torex Step-Up DC-DC Converter Is Ideal Backlight Driver Solution For Hand-Helds
New from Torex Semiconductor is the XC9133 Series, a fixed frequency, constant current, step-up DC-DC converter that is ideal for driving the white LEDs used in LCD backlighting applications in a wide range of hand-held designs, such as PDAs, mobile phones and digital cameras.
Synchronous DC-DC Controller from Maxim
Maxim introduced the MAX15023, a low-cost, dual-output, synchronous step-down controller capable of driving external MOSFETs to deliver at least 12A per output. Operating over a wide, 4.5V to 28V input range, this device integrates a ±1% accurate voltage reference to provide an accurate output voltage from 0.6V to 85% of the input voltage.
Integrated PoE-PD Controllers from ON Semiconductor Meet Upcoming IEEE PoE+ Standard
ON Semiconductor has announced that its NCP1081 and NCP1083 integrated Power-over-Ethernet Powered Device (PoE-PD) / DC-DC converter controllers have been verified to meet the upcoming IEEE802.3at standard for high power communications applications. Both devices have not only passed the IEEE 802.3af standard tests but have also been verified by the University of New Hampshire Interoperability Laboratory (UNH-IOL) for the recent draft IEEE 802.3at (D3.1) standard - which includes a test of the two event physical layer classification.
Power management chips increase efficiency, voltage and output current in LED designs
Texas Instruments has introduced a high-power DC/DC boost LED driver (TPS61500) and high-voltage DC/DC boost converter (TPS61175), and expanded its step-down DC/DC converter series with TPS62110.
Micrel introduces Dual Non-Synchronous PWM Buck Regulators
Micrel has announced a new family of dual Non-Synchronous PWM buck regulators. Operating at 2 MHz and 4 MHz, with a maximum load current of 2Amps per channel, the MIC4742 (2MHz) and MIC4744 (4MHz) are the latest additions to the popular low-voltage family of small footprint, non-synchronous buck regulators. The ICs address the designer's need for a dual regulator solution for the popular 5 and 3.3V buses, as well as the need for smaller footprint and substantial cost savings.
Boost Converters with Output Disconnect in 2mm x 3mm DFN Package from Linear Technology
Linear Technology has announced the LT3495/-1 low noise boost converters with integrated power switches, Schottky diodes and output disconnect circuitry. The LT3495 uses a 650mA switch whereas the LT3495-1 uses a 350mA switch. Both parts are packaged in a 2mm x 3mm DFN-10 package. Their wide 2.3V to 16V input voltage range enables them to operate from single cell Li-Ion batteries up to fixed 12V input rails, delivering outputs up to 40V.
Tiny Current-Sense Amplifier from Maxim for Battery-Powered Applications
Maxim has introduced the MAX9610, a high-side, current-sense amplifier that provides precision monitoring for portable applications. Designed for battery-operated devices, the MAX9610 uses a precision input stage to achieve an extended, 1.6V to 5.5V input common-mode range (battery voltage). This input range is excellent for monitoring the current of a single-cell, lithium-ion (Li+) battery, which at full-charge is 4.2V, typically 3.6V in normal use, and less than 2.9V when ready to be recharged. Maxim has introduced the MAX9610, a high-side, current-sense amplifier that provides precision monitoring for portable applications. Designed for battery-operated devices, the MAX9610 uses a precision input stage to achieve an extended, 1.6V to 5.5V input common-mode range (battery voltage). This input range is excellent for monitoring the current of a single-cell, lithium-ion (Li+) battery, which at full-charge is 4.2V, typically 3.6V in normal use, and less than 2.9V when ready to be recharg
TrenchFET Power MOSFET in MICRO FOOT Chipscale Package
Vishay has released what it says is the industry's first TrenchFET power MOSFET in the chipscale MICRO FOOT package to feature backside insulation. The Si8422DB is optimized for power amplifier, battery, and load switching in portable devices such as cell phones, PDAs, digital cameras, MP3 players, and smart phones. The 2-mil backside coating of the device insulates the top of the MICRO FOOT package to electrical shorts from being created by temporary contact with moving parts in portable devices.
Fully Integrated Wide-Input Range Boost Regulators from Micrel
Micrel has introduced the MIC2605/6, two boost regulators operating at 1.2MHz (MIC2605) and 2MHz (MIC2606). Both devices supply up to 0.5A switch current. The devices, which complement Micrel's recently introduced MIC2601/2 family, are aimed at TV-tuners, broadband communications, TFT-LCD bias supplies, positive output regulators, SEPIC converters, DSL applications and local boost regulators. The ICs are currently available in volume quantities, with pricing starting at $0.98 for 1K quantities.
Dual-Output Synchronous Step-Down Controller from Maxim
Maxim has introduced the MAX15034, a high-performance, dual-output, synchronous step-down controller capable of driving external MOSFETs to deliver two 25A outputs or a single 50A output. This flexibility allows the device to be used for multiple design platforms, thereby reducing inventory and cost.
Micrel's HyperLight Load Regulator Supports Green Home/Office Appliances and Handheld Products
Micrel has launched the MIC23150, the highest output current device in the popular HyperLight Load family of synchronous step-down regulators. The patented architecture implemented in the MIC23150 delivers extremely high efficiency light load for portable products and green home/office appliances. The MIC23150 features internal MOSFETs able to deliver up to 1.5 Amps output current while consuming just 23 Micro Amps of quiescent current inside a tiny 2mm x 2mm Thin MLF package.
Power Management IC for OLEDs from Maxim
Maxim has introduced the MAX17065 highly integrated power-management IC (PMIC) that includes a step-up DC-DC converter, an inverting DC-DC converter, regulated positive and negative charge pumps, and a low-dropout linear regulator (LDO). Developed using Maxim's proprietary high-voltage technology, this PMIC integrates all power functions required for active-matrix, organic light-emitting diode (AM-OLED) displays.
Dual input charger IC from AnalogicTech
By integrating over-voltage protection (OVP) up to 28V for both inputs, AnalogicTech's AAT3691 helps designers maximize charging flexibility and reliability while reducing parts count and end product footprint.
Buck regulator IC from Allegro MicroSystems
The new A4403 from Allegro MicroSystems Europe is a 3 A buck regulator IC which uses a valley current-mode control scheme to offer very low switch-on times, making it ideal for applications that require high switching frequencies combined with high input voltages and low output voltages.
190-V N-Channel Power MOSFET Plus 190-V Co-Packaged Power Diode
Vishay Intertechnology has announced the industry's first 190-V n-channel power MOSFET plus co-packaged 190-V power diode with a compact 2-mm by 2-mm footprint and an ultra-thin 0.75-mm profile. Offered in the PowerPAK SC-70 package, the SiA850DJ is also the industry's first such device with an on-resistance rating at1.8-V VGS.
TI’s new power-distribution switches provide highly accurate current limits
Four new power-distribution switches from Texas Instruments enable end equipment to handle heavy capacitive loads while preventing short-circuits in a variety of applications, such as USB ports/hubs, cell phones, laptops, flat panel TVs and set-top boxes. The new chips offer a programmable current-limit threshold from 75 mA to 1.3 A via an external resister with up to 6 percent accuracy.
Switch Mode USB Power Manager From Linear Technology
Linear Technology has announced the LTC3567, the latest in a family of compact next-generation, multi-function power management solutions for Li-Ion/Polymer battery applications. The LTC3567 integrates a switching PowerPath manager, a stand-alone battery charger, a 1A high efficiency synchronous buck-boost regulator, an ideal diode and controller, I2C control, plus an always-on LDO, all in a compact, low-profile 4mm x 4mm QFN package.
High Speed Synchronous N-Channel MOSFET Driver from Linear Technology
Linear Technology has introduced the LTC4447, a high speed synchronous MOSFET driver designed to drive upper and lower power N-Channel MOSFETs in a synchronous rectified converter topology. This driver, combined with power MOSFETs and one of Linear Technology's DC/DC controllers, forms a complete high efficiency synchronous regulator that can be used as a step-down or step-up DC/DC converter.
IR’s Latest MOSFETs Deliver 60 Percent Improvement in Package Current Rating
International Rectifier has introduced a new range of trench HEXFET Power MOSFETs featuring a high package current rating for industrial battery, power supply, high power DC motors and power tools.
20 and 30V P-Channel TrenchFET Power MOSFETs from Vishay
Vishay Intertechnology has released new 20-V and 30-V p-channel TrenchFET power MOSFETs with a ±20-V gate source voltage that offer the industry's lowest on-resistance for their device types in the SO-8 footprint.
Half-bridge MOSFET driver from AnalogicTech
Today's multiphase DC-DC converter and motor control circuit designers need low cost drivers capable of supporting higher voltages. By operating at up to 28V and combining a high switching frequency with a compact SC70JW package, AnalogicTech's AAT4910 MOSFET driver meets that need. Moreover, with an extremely low 3ohms drive resistance, the device allows them to drive larger MOSFETs faster in these applications.
Self protected MOSFET from Diodes Inc
Adding to its IntelliFET product range, Diodes Incorporated has introduced what it says is the world's smallest fully self protected low side MOSFET. Packaged in the 2.3mm x 2.8mm footprint 'flat' SOT23F package, the ZXMS6004FF takes 85% less board space than incumbent 7.3mm x 6.7mm footprint SOT223 packaged parts.
TI's 0.7-V input boost converter supports 5 µA operating current
Texas Instruments has introduced a 2-MHz DC/DC boost converter that operates at 5 µA of quiescent current, while maintaining a high efficiency at light load conditions. The integrated circuit supports an input voltage of 0.7 V to 5.5 V and an output voltage range of 1.8 V to 5.5 V, extending battery life in low-power microcontroller-based designs, such as single AA or coin-cell alkaline applications.
National Semiconductor’s High-Voltage Step-Down Controller Family
National Semiconductor has introduced four new high-voltage, non-synchronous buck controllers that include a comprehensive feature set of high input voltage range, high-performance pulse width modulation (PWM) control and reduced electromagnetic interference (EMI).
Dual channel synchronous step-down DC-DC converter from Torex
The XC9515 Series from Torex Semiconductor is a dual channel synchronous step-down DC-DC converter plus a voltage detector with delay circuit built-in. This series is available in the compact QFN-20 package and is suitable for a variety of applications, including DVD and Blu-ray equipment, LCD TVs and modules, multifunctional printers and set top boxes.
20-V N-Channel Power MOSFET Plus Schottky Diode
Vishay Intertechnology has announced a 20-V n-channel power MOSFET plus Schottky diode. Featuring the 1.6-mm by 1.6-mm thermally enhanced PowerPAK SC-75 package, the SiB800EDK combines a Schottky diode with a low forward voltage of 0.32 V at 100 mA and a MOSFET with on-resistance ratings specified at gate drives down to 1.5 V.
Integrated Driver- MOSFET from Renesas
Renesas Technology Europe has announced the R2J20651NP Integrated Driver-MOSFET. Available in a 40-pin QFN 6 mm x 6 mm package, the device is designed for use in the CPU and DDR type SDRAM power supplies used in PCs and servers and achieves, what is believed to be, the industry's highest power supply efficiency of 96.5% at Vin = 5 V, Vout = 1.8 V.
Control IC From IR Provides High Density Scalable Power Solution for POL Converters
International Rectifier has launched the XPhase IR3513 control IC for point-of-load (POL) converter designs. The IR3513 provides overall control of a scalable number of phases along with an internal gate driver, current sense and sharing, and PWM to provide a stand-alone single-phase regulator or interface with additional phase ICs enabling a power solution with any number of phases.
Siliconix 1-A Protected High-Side Load Switch from Vishay
Vishay Intertechnology has added to its family of current limit protection load switches with the release of a new protected high-side load switch that can operate under a supply voltage range of 2.4 V to 5.5 V and handle a continuous output current of 1 A.
Multiphase Step-Up DC/DC Controller From Linear Technology
Linear Technology has introduced the LTC3862, a 2-phase step-up (boost) DC/DC controller that delivers high output power in a compact footprint. Up to 12 power stages can be paralleled and clocked out-of-phase to minimize input and output filtering requirements. The 4V to 36V input voltage range and a wide output voltage range that is dependent on the choice of external components covers a broad range of high power boost applications.
Power Integrations Delivers Five-Star Rating for Cellphone-Charger Power Consumption
Power Integrations has announced that its LinkSwitch-II family of power conversion ICs enables manufacturers of cellphone chargers to achieve the recently announced five-star rating for no-load energy consumption.
N-Channel TrenchFET Gen III Power MOSFETs from Vishay
Vishay Intertechnology has expanded its family of Gen III TrenchFET power MOSFETs with the release of two 20-V and two 30-V n-channel devices that are the first to offer TurboFET technology, which utilizes a new charge balanced drain structure to lower the gate charge by up to 45%, enabling significantly lower switching losses and faster switching.
Torex Introduces Low Power LDO With Ultra Low Quiescent Current
The XC6502 Series of low dropout regulators from Torex Semiconductor provides an ultra low quiescent current of only 1.0µA. Available in industry standard SOT-23 and SOT-89 packages, these devices are particularly well-suited for power sensitive applications.
Industrial qualified MOSFETs from International Rectifier
International Rectifier has announced a new range of trench HEXFET Power MOSFETs featuring benchmark low on-state resistance (RDS(on)) in a TO-247 package for synchronous rectification, active ORing and industrial applications including high power DC motors, DC to AC inverters and power tools.
Battery charger IC from AnalogicTech
AnalogicTech has introduced the AAT3672, a highly integrated, single-cell Lithium-ion (Li-on)/polymer battery charger and system management IC. Using an innovative three-switch architecture, the dual path device enables simultaneous battery charging and system load management. It automatically reroutes power from the battery to the system without interruption when load requirements exceed available current. As a single-chip alternative to complex discrete solutions, the AAT3672 simplifies power circuit design, reduces board space requirements and drives down system cost in a wide variety of smart phones, navigation devices, and portable media players (PMPs).
Dual Low Noise LDO Regulators from Torex
Torex Semiconductor has added to its dual LDO regulator line up with the introduction of the XC6416 and XC6419 Series. Available in an ultra small USP-6C package, which measures just 1.8mm x 2.0mm x 0.6mm, as well as the small SOT-26, these dual output devices meet the demands of battery-powered applications where small size and low power consumption are key design criteria. Typical applications include mobile phones, portable games, cameras, portable AV equipment and PDAs.
Programmable 150mA Supercapacitor Charger from Linear Technology
Linear Technology has introduced the LTC3225, an inductorless programmable supercapacitor charger for addressing high peak power and battery backup needs in portable applications. The device employs a low-noise charge-pump architecture to charge two supercapacitors in series to a fixed output voltage (4.8V/5.3V selectable) from a 2.8V to 5.5V input supply.
