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Summit has launched programmable power manager (PPM) integrated circuits to provide digital power control and programmability for a range of high-volume consumer applications.

Summit’s SMB20X range supports advanced power management for green and Energystar applications, including digital LCD/LED televisions, cable/satellite/IP set-top boxes and other multimedia, broadband and small-office home-office (SOHO) communications equipment.

New products include the SMB207/207A/208/208A/209/209A single- and dual-output integrated DC-DC buck regulators.

The SMB20X range combines Summit’s digital programmability with the dense integration, compact size and cost-effective bill of materials (BoM) necessary for mass-market consumer products.

With a serial digital interface and on-board non-volatile memory, the SMB20X range can be easily configured during development and reprogrammed in system by host software.

The result is a flexible, digitally controlled power-supply design that is easily customisable without complex hardware design cycles or microcontroller-style GPIO-based control.

The integration of advanced power-control functions eliminates external components and cost, improves functionality and performance, and minimises development time.

The SMB20X range integrates a single or dual step-down DC-DC buck regulator with on-board high-side MOSFET(s) supplying up to 1A+1A (SMB207), 2A+ 2A (SMB208) or 4A (SMB209) output currents.

Input voltage range is +4.5 to +16V and output voltage range is +0.8 to +5.0V, accurate to 2.5 per cent over load/line/temperature.

Output voltage is programmable in 100mV (SMB207/208/209) or 10mV steps (SMB207A/208A/209A).

Switching frequency is programmable to 500kHz or 1MHz with 180deg phase interleave for SMB207/208.

Light-load efficiency is supported by automatic pulse-skipping operation.

Integrated frequency compensation and feedback resistors minimise BoM count, cost and design effort.

Output enable, sequencing, softstart and output voltage (UV) monitoring are all programmable.

Output voltage monitoring is coupled to ‘power good’ or ‘reset’ signals with programmable output assignment, and output channels can be enabled via the serial I2C interface or by the enable pins.

Nominal output voltages maybe changed once the system is powered up, enabling the latest SoCs to reduce platform power using advanced voltage/clock scaling modes.

The SMB20X A versions with the 10mV fine-step output voltage programming allow for easy voltage margining to support system validation and characterisation of these same advanced SoCs.

3 x 3mm QFN packaging and minimal external components yield an ultra-compact (typically less than 100mm2) solution size.

Programmed configuration is held in the OTP non-volatile memory but may be changed in system by host software via the I2C port.

The rated operating temperature range is -40 to 85C.

The SMB20X range is ideal for a range of multimedia consumer and broadband/SOHO applications, such as digital LCD/LED/plasma/IP televisions, digital cable/satellite/IP set-top boxes and media gateways, broadband cable/DSL modems, wireless SOHO routers and switches.

Summit Microelectronics

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