SMB119
Preliminary Information
Seven-Channel Programmable DC-DC Power Manager FEATURES & APPLICATIONS
Digital programming of all major parameters via I C interface and non-volatile memory o Output voltage setpoint/margining o Sequencing & digital soft start o Enable/Disable outputs independently o Input/Output UV/OV voltage thresholds o PWM/PFM mode Seven programmable regulator channels with 1.5% accuracy o Three synchronous step-down (buck) with internal PFETs o Two step-up (boost) o One configurable step-up (boost) or step-down (buck) o One adjustable output voltage LDO +2.7V to +6.0V Input Range (Higher system voltages supported) Built-in current limiting, UV/OV, and thermal protection Highly accurate reference and output voltage (<1.5%) 1MHz PWM frequency and automatic power-saving PFM mode 96 bytes of user configurable nonvolatile memory Space-saving 7x7 QFN-48 package
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INTRODUCTION
The SMB119 is a highly integrated and flexible seven-channel power manager designed for use in a wide range of portable applications. The built-in digital programmability allows system designers to custom tailor the device to suit almost any multi-channel power supply application from digital camcorders to mobile phones. The SMB119 integrates all the essential blocks required to implement a complete seven-channel power subsystem including three synchronous step-down "buck" converters, one configurable step-up "boost" or step-down synchronous "buck" converter, two step-up (boost) converters, and one linear regulator (LDO). Additionally sophisticated power control/monitoring functions required by complex systems are built-in. These include digitally programmable output voltage setpoint, power-up/down sequencing, enable/disable, margining, dynamic voltage management, and UV/OV input/output monitoring on all channels. By incorporating a second ENABLE input and 7-level dynamic voltage control, the SMB119 is ideal for powering systems based on Xscale and other similar processors. The integration of features and built-in flexibility of the SMB119 allows the system designer to create a "platform solution" that can be easily modified via software without major hardware changes. Combined with the re-programmability of the SMB119, this facilitates rapid design cycles and proliferation from a base design to futures generations of product. The SMB119 is suited to battery-powered applications with an input range of +2.7V to +6.0V and provides a very accurate voltage regulation (<1.5%). Communication is accomplished via the industry 2 standard I C bus. All user-programmed settings are stored in nonvolatile EEPROM of which 96 bytes may be used for general-purpose memory applications. The commercial operating temperature range is 0C to +70C, the industrial operating range is –40C to +85C, and the available package is a 48-pad 7mm x 7mm QFN.

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