Summit IC Powers Portable Consumer Products

2-Dec-04

Summit Microelectronics has announced a power supply design that gives system design engineers flexibility and ease of implementation. Using the new Summit SMB120, designers can now digitally program the entire multiple output power supply and associated power management functions with a few clicks of a mouse. ""The SMB120 is Summit's first device in a series of increasingly integrated configurable precision power products for the consumer electronics market and, as such, sets a new direction for the company,"" stated Chuck Berghoff, Summit President and CEO. ""Consumer electronics OEMs are under intense pressures to release more products to market with shorter development cycles than ever before. Summit's proven programmable analog technology creates a 'platform' solution that allows OEMs to develop designs dramatically faster and with fewer engineering resources than with conventional offerings. Our new consumer products leverage Summit's programmable precision control technology, supplied for years to the world's leading communication market equipment OEMs. They integrate power conversion functions to a level not seen before. Initial customer adoption is exceeding expectations."" Incorporating a level of programmability, integration and precision previously missing in power management integrated circuits, the SMB120 utilizes the I2C bus as a management bus, providing a digital, simple-to-use GUI software-driven programming interface. Capability includes the ability to independently sequence on/off each output with precisely controlled timing and slew rate and program or arbitrarily adjust ""on-the-fly"" (margining) output voltages with +/- 0.5% accuracy. The adjust function can be used as a brightness or audio level control. Additionally, complete power system diagnostics and monitoring is provided via the digital interface. These include input and output monitoring for under/over-voltage (UV/OV), low/missing battery detection, AC adapter detection and RESET output. All configuration data for the SMB120 is stored in on-chip EEPROM memory of which 96 bytes are available for user data storage. Enhancing flexibility ever further, the device can be programmed during development and then used in a ""fixed"" configuration or it may be re-programmed in-system via the I2C interface. The SMB120 incorporates a total of nine-channels of power conversion: four pulse-width modulated (PWM) DC-DC step-down (buck) converters, three PWM DC-DC step-up (boost) converters, one PWM DC-DC inverting step-up/down (buck/boost) converter, and one low-dropout linear LDO regulator. All PWM channels are digitally programmable for output characteristics and monitoring, including voltage output levels to +/- 0.5% accuracy. This array of converters is well suited and configurable to powering components commonly found in digital consumer electronics such as LCD-TFT displays, CCD imagers, DSPs, embedded CPUs, LED backlighting, motor drives and memory arrays. The outputs are easily scalable for output current due to external MOSFET switches further enhancing the flexibility of application for various designs. The SMB120 operates directly from +2.7V to +5.5V input making it suited for 1-cell Li-Ion battery applications. Higher input voltages (2-cell Li-Ion) can be accommodated in many cases with simple applications configuration. The operating temperature range is +0C to +70C and is available in the 64-pad QFN-64 package that is lead-free and RoHS-standard compliant. Available now in production quantities, the device is priced at $5.95 each in quantities of 1,000 units. For more information, visit http://www.summitmicro.com

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