Features: • Digital programming of all major parameters via I2C 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, switching frequency
• Eight programmable regulator channels with 1.5% accuracy
o Three synchronous step-down (buck) with internal PFETs
o One configurable step-up (boost) or synchronous step-down (buck)
o Two step-up (boost)
o One configurable step-up (boost) or inverting step-up/down (buck-boost)
o One adjustable output voltage LDO
• Programmable Linear Li-Ion Battery Charger
o Precharge/fast charge/termination current
o Fast Charge voltage threshold
o Float Voltage (<0.5% accuracy)
• +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%)
• 500 to 1000kHz PWM frequency and automatic power-saving PFM mode
• 96 bytes of user configurable nonvolatile memoryDescriptionThe SMB122 is a highly integrated and flexible nine-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 supplyapplication from digital camcorders to mobile phones .
The SMB122 integrates all the essential blocks required to implement a complete nine-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, one configurable step-up "boost" or inverting stepup/ down "buck-boost" converter, one linear regulator (LDO) and a fully programmable Li-Ion battery charger. Additionally sophisticated power control/monitoring functions required by complex systems are built-in. These include digitally programmable output voltage setpoint, powerup/ down sequencing, enable/disable, margining and UV/OV input/output monitoring on all channels.
The integration of features and built-in flexibility of the SMB122 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 SMB122 this facilitates rapid design cycles and proliferation from a base design to futures generations of product.
The SMB122 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 via the industry standard I2C bus. All user-programmed 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, the industrial operating range is 40C to +85C, and the available package is a 64-pad 9mm x 9mm QFN.
SMB122 Data Sheet
