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High-Performance Power ICs and Hall-Effect Sensors
Allegro Expands Product Line with Sanken Offerings
Sanken's power management ICs offer low cost, high reliability 
Worcester, MA — October 4, 2004 — Allegro is expanding its power management family with several new product families: low-cost, high-current LDOs, and low-cost, high-current switching regulators. Allegro is a wholly owned subsidiary of Sanken Electric Company, Ltd., a billion dollar company that manufactures semiconductors, discretes, LEDs, and switch mode power supplies, with headquarters in Saitama, Japan. The two companies jointly develop and market leading-edge products in the areas of power management and motion control.
The SI-300xKWM/KWD/KWF family includes low-cost, dual 1 A output, low dropout voltage regulators (LDO's), available in TO-252, TO-263 and TO-220 styles. The package's unique ground-potential tab for the TO-252 and TO-263 enables maximum PCB power dissipating capability, and improves PCB design component density using a widely available ground pattern. Low dropout voltage and low quiescent current enable improved system efficiency by minimizing power dissipation, while over-current and thermal protections enhance system-level reliability. Wide product selection of output voltage combinations, ranging from 1.5 V to 3.3 V, with the output current of 1 A per channel, covers various requirements of two different supply voltages of cores or other circuits.
The SI-3010LLSL is the industry's smallest and lowest priced 1.5 A low dropout regulator IC, with fast transient response in an SOP-8 package. The maximum dropout voltage of 300 mV at 1.5 A enables low-voltage difference conversions, such as 1.8 V to 1.5 V or 1.5 V to 1.2 V, while the low quiescent current of 800 mA improves system efficiency. The fast transient response and the use of a low ESR output capacitor minimize output voltage dip against transient dynamic output current change, while the integrated thermal and over-current protections enhance overall system reliability. Also included are thermal and over-current protections and enable input to reduce power consumption at standby.
The low-cost SI-300xZD/ZF series are 3 A low dropout voltage regulator ICs with fast transient response, available in TO-263 surface mount or TO-220 through-hole packages. The surface-mount package's ground potential tab maximizes PCB power dissipating capability and improves the PCB design's component density using a widely available ground pattern. Low dropout voltage enables improved system efficiency by minimizing power dissipation, and enables low-voltage difference conversion. Output voltage selection of 2.5 V, 3.3 V and adjustable output covers various voltage requirements of cores and other peripheral circuits.
The SPI-8001TW is an adjustable, dual 1.5 A output buck converter IC, available in an HSOP16 surface-mount package with enhanced thermal dissipation capability. The package's unique ground-potential slug enables connection to the widely available ground plane on a PCB for better thermal dissipation. The internal 1 V reference voltage provides very tight voltage tolerance of ±1% for better output voltage accuracy, and the integrated soft-start function eliminates input in-rush current to avoid voltage dip on the input voltage rail, which interferes with other key peripheral device performances. The PWM frequency is 250 kHz.
The SPI-8010A is a high efficiency (94%), adjustable output, 3 A buck converter IC, available in an HSOP16 package with enhanced thermal dissipation capability. The package's unique ground potential slug enables connection to a widely available ground plane on a PCB for better thermal dissipation. The integrated N-Channel DMOSFET improves system efficiency, and 1 V internal reference voltage enables 1 V and above output voltage conversion. The soft-start function minimizes input in-rush current to avoid voltage dip on the input voltage rail, which interferes with other key peripheral device performances, while the thermal and over-current protections enhance overall system level reliability. The PWM frequency is 250 kHz.
The low-cost SI-8xxxJD/JF family consists of 1.5 A buck converter ICs available in TO-263 surface-mount or TO-220 through-hole packages. 125 kHz PWM frequency minimizes noise interference. The selection of output voltage (2.5, 3.3, 5.0, 9.0 and 12.0 V) covers voltage requirements in many applications. The soft-start function minimizes input in-rush current to avoid voltage dip on an input voltage rail, which interferes with other key peripheral device performances. The integrated thermal and over-current protections enhance overall system reliability.
The SI-3xxxKM series, low-cost, low-dropout voltage regulators (LDO's), contain 1 A low-dropout voltage regulator ICs with a five-lead TO-252 surface-mount package and a ground-potential tab. The SI-3010KM, 3050KM, 3090KM, and 3120KM are 1 A LDO's designed for use with a standard electrolytic output capacitor. The SI-3012KM, 3018KM, 3025KM, and 3033KM are 1 A LDO's designed for use with a low ESR output capacitor.
Allegro MicroSystems, Inc. is a supplier of advanced mixed-signal power semiconductors and Hall-effect sensors targeted toward the automotive, communications, computer/office automation, consumer and industrial markets. It maintains a leadership position in the integrated magnetic sensor and integrated motor driver product segments. With over 2,000 employees, Allegro is headquartered in Worcester, MA. Further information about Allegro, as well as free samples of our products, can be found at www.allegromicro.com.
Editorial Contact:
Stephanie Fennelly
Director – Marketing Communications
Tel: (508) 854-5363
sfennelly@allegromicro.com