INTRODUCTION

The SMB113A/B and SMB117/A are highly integrated and flexible four-channel power managers designed for use in a wide range of 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 set-top boxes. Complete with a user friendly GUI, all programmable settings, including output voltages and input/output voltage monitoring, can be customized with ease.

The SMB113A/B and SMB117/A integrate all the essential blocks required to implement a complete four-channel power subsystem consisting of four synchronous step-down “buck” controllers. Additionally sophisticated power control/monitoring functions required by complex systems are built-in. These include digitally programmable output voltage set point, powerup/down sequencing, enable/disable, dynamic voltage management and UV/OV monitoring on all channels.

The integration of features and built-in flexibility of the SMB113A/B and SMB117/A 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 SMB113A/B and SMB117/A, this facilitates rapid design cycles and proliferation from a base design to future product generations.

The SMB113A/B and SMB117/A are suited to a wide variety of applications with an input range of +2.7V to +6.0V. Higher input voltage operation can easily be implemented with a small number of external components. Output voltages are extremely accurate (<1.5%). Communication is accomplished via the industry standard I2C bus. All user-programmed settings are stored in non-volatile EEPROM of which 96 bytes may be used as general-purpose memory. The devices are offered in both the commercial and the industrial operating temperature range. The package type is a lead-free, RoHS compliant, 5x5 QFN-32.

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