Summit Announces SMB119 Multi-Output Programmable Power Manager IC

Summit Microelectronics Microelectronics has announced the latest addition to the company’s family of multi-output programmable power manager ICs. The SMB119 is targeted at portable consumer equipment and integrates seven precision programmable regulators and a wide range of digital power control functions. This “one-chip” solution offers the highest design flexibility in the industry, while reducing system solution size and cost.

Summit SMB119 Multi-Output Programmable Power Manager ICSummit’s easy-to-use PC-based graphical (GUI) development environment lets system designers digitally program the entire multiple output power supply and associated power management functions with a few clicks of a mouse. In high-volume production Summit provides product that is pre-programmed with the customer’s “custom configuration” at no extra cost. Compared to inflexible conventional analog power ICs, the SMB119 yields optimized power system designs in significantly shorter development time.

Features
The SMB119 incorporates three synchronous step-down converters, two step-up converters, one configurable step-up or step-down converter, and one low-dropout (LDO) linear regulator. Also included is a fully programmable system supervisor that monitors all channels for under-voltage and over-voltage events. The user can select how the SMB119 should react under abnormal conditions (assertion of RESET output, power-down in sequencing order or force shutdown), thereby maximizing system reliability.

The power manager operates at a switching frequency of 1MHz, allowing for space-saving system components. DC-DC Power conversion efficiency of up to 95 percent reduces thermal dissipation and improves battery life in portable systems. Further enhancing battery life, a shutdown mode reduces current consumption to 0.1µA while automatic PWM/PFM operation improves light load efficiency. A PWM-override mode is also available for noise sensitive RF or audio applications. Short circuit current limiting and thermal protection safety circuits are also built-in to enhance reliability. The power manager operates at a switching frequency of 1MHz, allowing for space-saving system components. DC-DC Power conversion efficiency of up to 95 percent reduces thermal dissipation and improves battery life in portable systems. Further enhancing battery life, a shutdown mode reduces current consumption to 0.1µA while automatic PWM/PFM operation improves light load efficiency. A PWM-override mode is also available for noise sensitive RF or audio applications. Short circuit current limiting and thermal protection safety circuits are also built-in to enhance reliability.

Programmability
The SMB119 provides Digital Power Management via an I2C interface and non-volatile memory allowing the user to configure power functions and parameters for each channel: individual channel enabling/disabling, power-up/down sequencing, power-up slew rate control, static and dynamic output voltage control (Dynamic Voltage Management). A broad range of intelligent power system diagnostics and monitoring functions can be easily accessed via the I2C serial interface and digital status outputs. These include input and output monitoring for under/over-voltage/over-current (UV/OV/OC) and integrated RESET control. Enhancing flexibility even 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.

“Conventional discrete and hard-wired power management ICs cannot cope with the increasing sophistication of feature-rich consumer electronics and shorter time-to-market cycles,” stated George Paparrizos, Summit marketing director. “The SMB119′s digital power control functionality and operational versatility deliver high performance and flexibility. At the same time, the device’s high efficiency meets Summit’s commitment to offer ‘green’ systems solutions.”

Applications
The SMB119 is ideal for a wide range of portable consumer electronics such as digital still cameras/camcorders (DSC/DCC), portable media players (MP3/MPEG4), GPS terminals, portable medical equipment, personal digital assistants (PDAs), as well as the next generation of “smart” mobile phones. The dynamic voltage management feature is particularly useful in Xscale[tm] and ARM[tm] CPU applications and where LED backlight brightness control is desired.

The SMB119 operates directly from +2.7V to +6.0V input making it ideal for 1-cell Li-Ion (+3.0V to +4.2V) battery applications, although line-powered applications are readily supported as well. The device has an operating temperature range of +0oC to +70oC or –40oC to +85oC and is available in the 7mm x 7mm 48-pad QFN package that is lead-free and RoHS-standard compliant.

Pricing and Availability
Available now in production quantities, the device is priced at $3.74 each in quantities of 10,000 units.

Design Software/Hardware and Programmer for Prototype Development
To speed user product development, Summit offers customers the SMB119EV companion evaluation board and a graphical user interface (GUI) software so designers can quickly see the features and benefits and design a prototype power supply with the SMB119. This is a complete development tool that lets designers easily manipulate the characteristics of their systems. The SMB119EV design kit includes menu-driven Microsoft Windows (R) GUI software to automate programming tasks and also includes all necessary hardware to interface to the USB port of a laptop or PC.

Once a user completes design and prototyping, the SMB119EV automatically generates 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.

A reference design that utilizes the SMB119, 7-level programmable power manager, and the SMB137, switch-mode charger with CurrentPath[tm] control, is also available for accelerating product development for a complete portable system design.

About Summit Microelectronics
Summit Microelectronics is the leader in flexible, highly integrated power management solutions combining precision power regulation with sophisticated digital control in a single chip. The Company’s devices are found in a variety of consumer, communications and computing applications. Summit’s unique programmable, non-volatile mixed-signal IC technology combined with a convenient GUI development environment allows for unparalleled functional and parametric flexibility in power supply design. This flexibility applied to common problems such as dynamic voltage/current control and intelligent battery charging, allows for significant system performance improvement while realizing drastic reductions in design effort. Digital programmability enables high integration and system flexibility in a single chip – impossible with conventional “hard-wired” analog power ICs. Additionally, this integration reduces the bill-of-materials yielding the lowest total system cost and size. Summit solutions address the biggest challenges facing OEM developers today: increasing system functionality, performance and complexity accompanied by shrinking development time cycles.