2/20/2003 - Microchip Technology (Nasdaq:MCHP) announced a 500mA, DC-to-DC synchronous step-down converter that operates over a multitude of input and output conditions. This gives designers an efficient method of transforming battery or bus voltage to its system requirements.
Used in applications such as cellular phones, PDAs, digital cameras and USB-powered devices, the MCP1601 operates in three modes and automatically switches among them to follow a maximum efficiency curve for the given input/output (I/O) condition. The three operating modes include: pulse width modulation (PWM), for normal medium-to-high load conditions; pulse frequency modulation (PFM), for light or no-load conditions over an extended time; and low-drop-out mode (LDO), for cases when the input approaches the output voltage.
This DC-to-DC converter also has integrated safety features, such as over-current, over-temperature and under-voltage lockout (UVLO) protection to safeguard the converter circuitry. Additionally, the device has an externally controllable shutdown mechanism to minimize drain current during system inactivity. Moreover, the MCP1601 can be implemented with a complete ceramic capacitor solution eliminating the need for larger tantalum caps.
“The MCP1601 provides a very efficient and cost effective method of converting battery or bus voltages to a desired lower voltage,” said Jim Mack, marketing manager for Microchip’s Analog and Interface Products Division. “In addition, it offers several self-protection mechanisms that provide an additional level of security for our customers.”
The input voltage on this device ranges from 2.7 to 5.5 volts. The output voltage range is from 0.9V to as high as VIN for the input voltage, while the shutdown current is typically less than 0.1µA. It has a load current capability of up to 500mA continuous and will operate at 100 percent duty cycle or LDO mode when the input voltage approaches the output voltage. The UVLO voltage ranges between 2.4 and 2.7 volts.
Available in an 8-pin MSOP, pricing for this device is $1.85 in 1 000-piece units. Samples and volume-production quantities are available today. For additional information or pricing on these devices, contact any Microchip sales representative or authorized worldwide distributor or visit www.microchip.com.
About Microchip Technology
Microchip has integrated analog technology, peripherals and features to meet today's demanding design requirements. Our broad spectrum of analog products addresses thermal management, power management, mixed-signal, linear and interface solutions. Combined with “Intelligent Analog” microcontrollers, Microchip offers an extensive analog portfolio for thousands of high-performance design applications in the automotive, communications (wireless), consumer, computing and industrial control markets.
Microchip Technology Inc. manufactures the popular PICmicro® field-programmable RISC microcontrollers, which serve 8- and 16-bit embedded control applications, and a broad spectrum of high performance linear and mixed-signal, power management and thermal management devices. The Company also offers complementary microperipheral products including interface devices; microID® RFID devices; serial EEPROMs; and the patented KEELOQ® security devices. This synergistic product portfolio targets thousands of applications and a growing demand for high-performance designs in the automotive, communications, computing, consumer and industrial control markets. The Company's quality systems are ISO 9001 (1994 version) and QS9000 (1998 version) certified. Microchip is headquartered in Chandler, Ariz. with design facilities in Mountain View, Calif., Bangalore, India; and a European Design Center in Lausanne, Switzerland; semiconductor fabrication facilities in Tempe and Chandler, Ariz.; Gresham, Ore.; and Puyallup, Wash.; and assembly and test operations near Bangkok, Thailand. Microchip employs approximately 3,350 people worldwide and has sales offices throughout Asia, Europe, Japan and the Americas. More information on the Company can be found at www.microchip.com.
The Microchip name and logo, PIC, PICmicro, microID and KEELOQ are registered trademarks of Microchip Technology Inc. in the USA and other countries.
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