The SMB119 is targeted at portable consumer equipment and integrates seven precision programmable regulators and digital power control functions. This "one-chip" solution offers design flexibility, while reducing system solution size and cost.
Summit's 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, the company provides product that is pre-programmed with the customer's "custom configuration". The SMB119 yields optimised power system designs in shorter development time.
It 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 maximising 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 per cent reduces thermal dissipation and improves battery life in portable systems. A PWM-override mode is also available for noise sensitive RF or audio applications.
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.
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.