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| SMB120 Nine-Channel DC/DC Digitally Programmable System Power Manager FEATURES & APPLICATIONS * Digital programming of all major parameters via I2C 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 Dynamic Voltage Management o UV/OV monitoring of all outputs o Enable/disable outputs independently * Nine output channels o Four synchronous step-down (buck) channels o Three step-up (boost) channels o One inverting (buck-boost) channel o One 3.3V fixed LDO channel * User friendly Graphical User Interface (GUI) * 2.7V to 6.0V Input Range * Highly accurate reference and output voltage (<0.5%) with Active DC Output Control (ADOCTM) technology * Undervoltage Lockout (UVLO) with hysteresis * 800 kHz operating frequency (trimmable) * 96 bytes of user configurable nonvolatile memory * Eight Phase PWM with Phase Locked Loop (PLL) * 100% Maximum Duty Cycle for Buck channels * 0% Duty Cycle option for boost and buck-boost channels Preliminary information INTRODUCTION The SMB120 is a highly integrated and flexible nine-channel programmable 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. Complete with a user friendly GUI, all programmable settings including output voltages and input/output voltage monitoring can be customized with ease. The SMB120 integrates all the essential blocks required to implement a complete nine-channel power subsystem including four synchronous step-down "buck" controllers, three step-up "boost" controllers, one inverting "buck-boost" controller, and one linear regulator (LDO). 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, dynamic voltage management and UV/OV/input monitoring on all channels. The integration of features and built-in flexibility of the SMB120 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 SMB120 this facilitates rapid design cycles and proliferation from a base design to future generations of product. The SMB120 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 ADOCTM 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 commercial operating temperature range is 0C to +70C and the industrial temperature range is -40C to +85C The SMB120 is available in a lead-free, RoHS compliant 9mm x 9mm 64 pin QFN package. Applications * * * * * * Digital camcorders/still cameras Portable DVD/MP3/GPS Camera phones TFT/LCD Displays/Monitors/TV's Mobile Computing Consumer battery-operated equipment * Intel X-ScaleTM -based consumer devices * SIMPLIFIED APPLICATIONS DRAWING SMB120 LDO +2.7V to +6.0V or Li-Ion Inverter Channel +3.3V MCU/RTC -0.8V to -23V(Prog.) CCD Vin to +28V (Prog.) 3 Step-Up (Boost) Channels LED Drive Vin to +28V (Prog.) TFT/LCD Vin to +28V (Prog.) Motor Drive I2C/SMBus +0.8V to Vin (Prog.) CPU Core Reset Input Reset Output Power Good System Control and Monitoring 4 StepDown (Buck) Channels +0.8V to Vin (Prog.) Memory, I/O +0.8V to Vin (Prog.) DSP/Codec +0.8V to Vin (Prog.) Analog/RF Figure 1 - Applications schematic featuring the SMB120 Nine-Channel DC-DC Digitally Programmable Power Manager. This DC/DC controller provides power-on/off control, sequencing, fault monitoring, and Dynamic Voltage Management. Note: This is an applications example only. Some pins, components and values are not shown. (c) SUMMIT Microelectronics, Inc. 2005 * 1717 Fox Drive * San Jose CA 95131 * Phone 408 436-9890 * FAX 408 436-9897 http://www.summitmicro.com/ 2090 2.3 11/15/2005 1 |
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