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, power up/down sequencing, enable/disable, dynamic voltage management and UV/OV monitoring on all channels.

• Digital programming of all major parameters via I2C interface and non-volatile memory
  •  Output voltage set point
  •  Input/battery voltage monitoring
  •  Output power-up/down sequencing
  •  Digital soft-start and output slew rate
  •  Dynamic voltage control of all outputs
  •  UV/OV monitoring of all outputs
  •  Enable/Disable outputs independently
• User friendly Graphical User Interface (GUI)
• Four synchronous step-down output channels
• Integrated RESET monitor
• +2.7V to +6.0V Input Range
• Highly accurate output voltage: <1.5%
• Factory programmable dead times
• 0% to 100% Duty Cycle operation
• Undervoltage Lockout (UVLO) with hysteresis
• 250kHz (SMB117A), 400kHz (SMB117), 800kHz (SMB113A), 1MHz (SMB113B) operating frequency
• 96 bytes of user configurable nonvolatile memory

Applications
• Car & Marine Navigation Systems
• Set-top Boxes
• TVs
• DDR Memory
• Mobile Computing/PDAs
• Office Equipment
• DMB Systems
FEATURES & APPLICATIONS