DESCRIPTION
●The TPS51220A is a dual synchronous buck regulator controller with two LDOs. It is optimized for 5-V/3.3-V system controller, enabling designers to cost effectively complete 2-cell to 4-cell notebook system power supply. The TPS51220A supports high efficiency, fast transient response, and 99% duty cycle operation. It supports supply input voltage ranging from 4.5 V to 32 V, and output voltages from 1 V to 12 V. Two types of control schemes can be chosen depending on the application. Peak current mode supports stability operation with lower ESR capacitor and output accuracy.
●FEATURES
●• Input Voltage Range: 4.5 V to 32 V
●• Output Voltage Range: 1 V to 12 V
●• Selectable Light Load Operation(Continuous / Auto Skip / Out-Of-Audio™ Skip)
●• Programmable Droop Compensation
●• Voltage Servo Adjustable Soft Start
●• 200-kHz to 1-MHz Fixed-Frequency PWM
●• Selectable Current/D-CAP™ Mode Architecture
●• 180° Phase Shift Between Channels
●• Resistor or Inductor DCR Current Sensing
●• Adaptive Zero Crossing Circuit
●• Powergood Output for Each Channel
●• OCL/OVP/UVP/UVLO Protections (OVP Disable Option)
●• Thermal Shutdown (Non-Latch)
●• Output Discharge Function (Disable Option)
●• Integrated Boot Strap MOSFET Switch
●• QFN-32 (RTV) Package
●APPLICATIONS
●• Notebook Computer System and I/O Bus
●• Point of Load in LCD TV, MFP
