TPS51220ARSNR

固定频率 99% 占空比峰值电流模式笔记本系统功率控制器 32-QFN -40 to 85

DESCRIPON

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 OperationContinuous / 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