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SMB110

Preliminary Information

Five Channel Programmable DC-DC System Power Manager

FEATURES & APPLICATIONS INTRODUCTION

Digital programming of all major parameters via I
2 C interface and non-volatile memory The SMB110 is a highly integrated and flexible five-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. Complete with a user friendly GUI, all programmable settings including output voltages and input/output voltage monitoring can be customized with ease. The SMB110 integrates all the essential blocks required to implement a complete five-channel power subsystem including two synchronous step-down “buck” controllers, one step-up “boost” controller, one inverting “buck-boost” controller and one fixed output +3.3V 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, margining and UV/OV/input/output monitoring on all channels. The integration of features and built-in flexibility of the SMB110 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 SMB110 this facilitates rapid design cycles and proliferation from a base design to future generations of product. The SMB110 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. Communication is via the industry standard I o Output voltage set point o Output power-up/down sequencing o Input/Battery voltage monitoring o Digital soft-start and output slew rate o Output voltage margining o UV/OV monitoring of all outputs o Enable/Disable outputs independently Five output channels o Two synchronous step-down (buck) channels o One step-up (boost) channel o One inverting (buck-boost) channel o One fixed output +3.3V LDO 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 (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
2 Camera/smart phones C bus. All user-programmed 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. TFT Displays/Monitors/TV’s Mobile Computing/PDA’s Consumer battery-operated equipment

SIMPLIFIED APPLICATIONS DRAWING

SMB110

+2.7V to +6.0VorLi-Ion LDO +3.3V @20mA MCU/RTC InverterChannel -0.8V to -30V (Prog.) @UP TO1A CCD Step-Up(Boost)Channels Step-Up(Boost)Channels Vin to +30V (Prog.) @ UP TO 1A I2C/SMBus TFT/LCD SystemControl andMonitoring +0.8V to 0.9 x Vin (Prog.) @ 2A Reset Input Memory, I/O 2 Step-Down(Buck)Channels Reset Output Power Good +0.8V to 0.9 x Vin (Prog.) @ 2A CPU Core

Figure 1 – Applications diagram featuring the SMB110 five - channel, programmable DC-DC controlle r 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/

2099 2.3 5 /3/2005

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