TPS51220RHBR
固定频率, 99 %占空比峰值电流模式笔记本系统功率控制器 Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller
The is a fixed frequency, notebook system Power Controller, dual synchronous buck regulator controller with 2 LDOs. It is optimized for 5/3.3V system controller, enabling designers to cost effectively complete 2-cell to 4-cell notebook system power supply. The TPS51220 supports high efficiency, fast transient response and 99% duty cycle operation. It supports supply input voltage ranging from 4.5 to 28V and output voltages from 1 to 12V. 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. The D-CAP mode supports fast transient response. The high duty 99% operation and the wide input/output voltage range supports flexible design for small mobile PCs and a wide variety of other applications. The fixed frequency can be adjusted from 200kHz to 1MHz by a resistor and each channel runs 180° out of phase.
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- Selectable light load operation continuous / auto skip / out-of-audio skip
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- Programmable droop compensation
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- Voltage servo adjustable soft start
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- Selectable current/D-CAP mode architecture
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- 180° Phase shift between channels
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- Resistor or inductor DCR current sensing
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- Powergood output for each channel
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- OCL/OVP/UVP/UVLO protections OVP disable option
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- Thermal shutdown non-latch
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- Output discharge function disable option
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- Integrated boot strap MOSFET switch