Power supply sequencer saves space and cost

With nonvolatile programmability the SMS11 addresses virtually any multi-output power supply application that requires monitoring and sequencing.

Summit Microelectronics has announced the SMS11, the newest device in a family of programmable monitor/sequencer/reset ICs, designed for communication and consumer electronics applications.

With nonvolatile programmability the SMS11 addresses virtually any multi-output power supply application that requires monitoring and sequencing.

Ultracompact chip-scale packaging (CSP) and low component count enables the SMS11 to bring sophisticated functionality to demanding applications without the bulk and cost of conventional alternatives.

"Power supply monitoring and sequencing is no longer an option for complex modern communications and consumer electronics equipment", stated Abid Hussain, Summit's Vice-President of Marketing.

"The SMS11's programmable flexibility, ultracompact footprint and dramatically reduced component count enable cost-effective implementation in virtually any application".

The SMS11 is well suited to many applications in communications and consumer electronics devices such datacomms/telecomms routers and switches, digital televisions and set-top boxes, cable/DSL modems, SOHO routers/gateways/WLAN, and multifunction printers.

The tiny CSP footprint allows integration in small form factors of modern consumer handheld equipment.

The SMS11 is also particularly well suited to FPGA/ASIC system development and reference designs where sequencing requirements may not be well understood in advance.

The SMS11's programmable capability allows for quick and easy re-configuration without hardware changes.

The SMS11 combines a precision four-input voltage monitor with a four-output power supply sequencer and reset controller.

Input voltage thresholds are fully programmable as are output sequence order and timing delays.

The global reset output is provided to signal completion of the sequencing routine and can be directly interfaced to system logic.

Also programmable are the sequence enable output polarity and the reset output behaviour.

SMS11's programmability addresses dozens of parametric combinations without any hardware changes to the system.

This feature simplifies and speeds up development while reducing total system component count, size and cost compared with conventional solutions using external resistors and capacitors for "programming".

The SMS11 operates from +2.7 to +5.5V (reset output valid at 1.0V) and typically consumes only 200mA of operating current.

The chip-scale package occupies only 1.4 x 2.5mm of board space and the application circuit only requires a single external resistor resulting in a solution size 50-90% smaller than comparable alternatives.

These features make the SMS11 well suited to portable and handheld applications in addition to line-powered systems.

The operating temperature range for the SMS11 is -5 to +70C.

Packaged in a tiny 8-ball 1.4 x 2.5mm CSP package, the SMS11 is 85% smaller than conventional solutions.

An 8-lead SOIC package is also available.

Both packages are available as lead-free and RoHS-standard compliant.

Available now in production quantities, the SMS11 is priced at US $0.88 each in quantities of 10,000 units for the CSP package and at $2.00 each in quantities of 1000 units for the SOIC package.

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