SMB111 Four Channel Programmable DC-DC System Power Manager FEATURES & APPLICATIONS Preliminary Information INTRODUCTION 2 • Digital programming of all major parameters via I C interface and non-volatile memory o Output voltage set point o Output power-up/down sequencing o Digital soft-start and output slew rate o Input/Battery voltage monitoring o UV/OV monitoring of all outputs o Enable/Disable outputs independently • Four output channels o Three synchronous step-down (buck) channels o One step-up (boost) channel • User friendly Graphical User Interface (GUI) • +2.7V to +6.0V Input range • Highly accurate output voltage (<0.5%) with Active DC Output Control (ADOC™) technology • Undervoltage Lockout (UVLO) with hysteresis • 800 kHz operating frequency • 96 bytes of user configurable nonvolatile memory Applications • Digital camcorders/still cameras • Portable DVD/MP3/GPS • Camera/smart phones • TFT/LCD Displays/Monitors/TV’s • Mobile Computing/PDA’s • Consumer battery-operated equipment The SMB111 is a highly integrated and flexible four-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 multichannel power supply application from digital camcorders to mobile phones. Complete with a user friendly GUI, all programmable settings including output voltages and input/output voltage monitoring can be customized with ease. The SMB111 integrates all the essential blocks required to implement a complete four-channel power subsystem including three synchronous step-down “buck” controllers and one stepup “boost” controller. Additionally sophisticated power control/monitoring functions required by complex systems are built-in. These include digitally programmable output voltage set point, power-up/down sequencing, enable/disable, margining and UV/OV/input/output monitoring on all channels. The integration of features and built-in flexibility of the SMB111 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 SMB111 this facilitates rapid design cycles and proliferation from a base design to future generations of product. The SMB111 is suited to battery-powered applications with an input range of +2.7V to +6.0V. Output voltages are extremely accurate (<0.5%) employing proprietary ADOC™ technology. 2 Communication is via the industry standard I C bus. All userprogrammed settings are stored in non-volatile EEPROM of which 96 bytes may be used for general-purpose memory applications. The operating temperature range is 0C to +70C and the available package is a lead-free, Green, RoHS compliant, 32-pad QFN-32. SIMPLIFIED APPLICATIONS DRAWING SMB111 +2.7V to +6.0V or Li-Ion Step-Up (Boost) Channel Vin to +30V (Prog.) @ UP TO 1A LED Drive I2C/SMBus +0.8V to 0.9 x Vin (Prog.) @ 2A Reset Input System Control and Monitoring Reset Output 3 StepDown (Buck) Channels +0.8V to 0.9 x Vin (Prog.) @ 2A +0.8V to 0.9 x Vin (Prog.) @ 2A CPU Core Memory, I/O DSP/Codec Power Good Figure 1: Applications schematic featuring the SMB111 four-channel, programmable DC-DC controller Note: This is an applications example only. Some pins, components and values are not shown. © SUMMIT Microelectronics, Inc. 2005 1717 Fox Drive • San Jose CA 95131 Phone 408 436-9890 • FAX 408 436-9897 http://www.summitmicro.com/ 2100 2.3 5/3/2005 1