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