The TPS51220RHBR 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.
● Selectable light load operation (continuous / auto skip / out-of-audio skip)
● Programmable droop compensation
● Voltage servo adjustable soft start
● Selectable current/D-CAP mode architecture
● 180° Phase shift between channels
● Resistor or inductor DCR current sensing
● 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
