New Products

Apr 1, 2008 12:00 PM

Low-Droput Regulators

Microchip Technology's MCP1790 and MCP1791 low-dropout regulators have a continuous 70-mA output, the ability to operate at a continuous input voltage of up to 30 V and a load-dump protection of up to 43.5 V. Ideal for automotive and industrial applications, the LDOs also feature low-quiescent current, shutdown current and ceramic capacitor stability, which enable smaller, ultra-efficient designs at lower costs.

The MCP1790 is a three-pin LDO, while the MCP1791 is a five-pin LDO, which offers shutdown and power-good functionality. Both LDOs are available in SOT-223 and D²PAK packages. The MCP1790 is priced starting at $0.76 each and the MCP1791 starts at $0.80 each, both in 10,000-unit quantities.
Microchip Technology
Chandler, Ariz.
www.microchip.com

MOSFET Drivers

Murata Electronics North America's MPD6D20*S dc-dc converter series achieves a 91% efficiency level, which minimizes excessive power consumption. Designed with a synchronous rectifier circuit, the series offers parallel operation as a standard I-sharing feature (up to 10 devices) and simplifies the implementation with an integrated reverse-current prevention circuit. No optical couplers are used, thus increasing reliability.

Available in a surface-mount device package, the MPD6D20*S is 40.05 mm × 31.15 mm × 8 mm max. Pricing is $18.05 each in volume quantities.
Murata Electronics North America
Smyrna, Ga.
www.murata.com

Dual-Voltage AC Fans

Orion Fans' line of dual-voltage ac fans can be configured to operate on either 115 V or 230 V. Three standard models of the OA109AP-11/22 Series fans are available: 3000 rpm/110 cfm airflow/15 W, 2300 rpm/71 cfm airflow/11 W and 1600 rpm/51 cfm airflow/8 W. All are constructed from die-cast aluminum and have UL94V-0 glass fiber-reinforced thermoplastic impellers. Orion maintains stocking inventory of the precision dual-bearing version at its headquarters, and the sleeve-bearing version is available by special order. Typical pricing of the OA109AP-11/22 Series is less than $16 each in quantities of 100.
Orion Fans
Dallas
www.orionfans.com

Brushless DC Pre-Driver IC

Allegro's first device in a series of single-phase brushless dc motor pre-drivers, the A4930 is used to control high-current fans, blowers or pumps. Outputs are designed to drive all n-channel MOSFET H-bridges with supply voltages between 8 V and 36 V. The motor speed is regulated by either a PWM input or an external analog voltage (typically thermistor). Motor speed can be monitored with the FG output and minimum speed can be programmed with an external voltage.

The A4930 is supplied in a lead-free 28-lead QFN package with exposed power tab. It has a 5-mm × 5-mm footprint and a 0.90-mm nominal height. It is priced at $0.77 each in quantities of 1000.
Allegro MicroSystems
Worcester, Mass.
www.allegromicro.com

Multiphase Converters

International Rectifier's iP2005A is a power-stage solution for high-current, synchronous buck multiphase converters used in gaming, computing and communications applications. The iP2005A is 40% smaller in size than the previous-generation device, while its efficient operation up to 1.5 MHz allows designers to further reduce board space by minimizing the value of output capacitors and inductors.

The iP2005A is optimized for very low EMI, eliminating the need for external snubber circuits in EMI-sensitive designs such as consumer game consoles. By eliminating external snubbers, the iP2005A reduces per-phase power loss by up to 2.3 W compared to the previous-generation device that required an external resistor and capacitor snubber with values of 2.2 V and 10-nF, respectively. Available in a 7.7-mm × 7.7-mm × 1.7-mm LGA package, the iP2005A is priced starting at $3.31 each in 10,000-unit quantities.
International Rectifier
El Segundo, Calif.
www.irf.com