Power Management ICs enable digital control of output power

San Jose, CA — Summit Microelectronics has announced two new devices in a growing family of Programmable Power Manager (PPM) integrated circuits (ICs). The SMB110 and SMB113 continue a new concept in power supply design that delivers unparalleled flexibility and ease of implementation to system design engineers. Using Summit's PPM IC's, system designers can digitally program the entire multiple output power supply and associated power management functions with a few clicks of a mouse compared to the tedious iterative hardware design of conventional analog power solutions.

Incorporating a level of programmability, integration and precision previously missing in power management offerings, the SMB110 and SMB113 integrate precise power delivery and power control in a single device. In addition to simplifying the power supply design, Summit's configurable technology creates a “power system platform” that allows a significant degree of hardware re-use. Original equipment and original design manufacturers (OEMs and ODMs) can reduce their development time and engineering investment and bring consumer products to market faster and
more reliably.

The SMB110 five-channel and SMB113 four-channel PPM IC's are optimized for increasingly complex consumer electronics applications such as digital cameras/camcorders (DSC/DCC), DVD/MP3 portable media players/recorders, global positioning (GPS) receivers, personal digital assistants (PDA's), LCD/TFT TV's/monitors, digital set-top boxes (STB) and digital video recorders (DVR's) as well as 3G “smart” mobile phones.

“The SMB110 and SMB113 demonstrate Summit's continued commitment to easing the burden on today's power supply designers and extends the leadership created by the award-winning SMB120.” stated Abid Hussain, Summit marketing director. “Designers can now choose a range of standard products to address virtually any complex power supply challenge while retaining the configurable 'platform' that makes Summit power management solutions so easy to use.”

The SMB110 comprises a total of five channels of power conversion: two pulse-width modulated (PWM) DC-DC step-down (buck) converters, one PWM DC-DC step-up (boost) converter, one PWM DC-DC inverting step-up/down (buck/boost) converter, and one low-dropout (LDO) linear regulator. The SMB113 offers four identical channels of PWM DC-DC step-down (buck) converters. The PWM channels on both devices are digitally programmable for output characteristics and monitoring, including voltage output levels to ±0.5% accuracy.

Each array of converters is well suited to powering components commonly found in digital consumer electronics such as DSPs, Codecs, embedded CPUs, LCD-TFT displays, CCD imagers, LED backlighting, motor drives and memory arrays. The outputs are easily scalable for output current due to external MOSFET switches, further enhancing the flexibility for various system requirements.

Complementing the precise power regulation is a suite of advanced power control features including: Static or dynamic output voltage programming and margining, independent channel sequencing/enable, and output slew rate control. Additionally, the devices provide complete power system diagnostics, including input and output monitoring for under/over-voltage (UV/OV), low/missing battery detection, AC adapter detection and RESET/HEALTHY output. The margining function can be conveniently used as an LED backlight brightness or audio-level control. The flexible control capability also enables more sophisticated power management algorithms to boost power efficiency and battery lifetime in an increasingly mobile product mix.

Programming is achieved via the convenient I2 C bus and configuration data is safely stored in non-volatile EEPROM memory of which 96 bytes are available for user data storage. The devices can be programmed during development and then used in a “fixed” configuration or they may be re-programmed in-system via the I2 C interface.

To speed user product development, Summit offers customers the SMB110EV and SBM113EV companion evaluation boards providing a graphic user interface (GUI) software so designers can quickly see the features and benefits and design a prototype power supply with the SMB110 or SMB113. This is a complete development tool that lets designers easily manipulate the characteristics of their systems. The SMB110EV and SMB113EV design kits includes menu-driven Microsoft Windows' graphic user interface (GUI) software to automate programming tasks and also includes all necessary hardware to interface to the parallel or USB port of a laptop or PC.

Once a user completes design and prototyping, the SMB110EV and SMB113EV kits automatically generate a HEX data file that can be transmitted to Summit for review and approval. Summit then assigns a unique customer identification code to the HEX file and programs the customer's production devices prior to final electrical test operations. This ensures that the device will operate properly in the end application. The design kit software can be downloaded today from Summit's website (

The SMB110 and SMB113 PPM devices operate directly from +2.7V to +6.0V input, making it ideally suited for one-cell Li-Ion battery applications. Higher input voltages (two-cell Li-Ion or +12V) can be accommodated in many cases with simple applications configuration. The operating temperature range is +0°C to +70°C and packaging is the 5mm X 5mm 32-pad QFN-32 that is lead-free and RoHS-standard compliant. Available now in production quantities, the SMB110 and SMB113 are both priced at $2.60 each in quantities of 1,000 units.

Summit Microelectronics, 1717 Fox Drive, San Jose, CA 95131. Tel: 408-436-9890

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