The TPS51220 is a dual synchronous buck regulator controller with 2 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 TPS51220 supports high efficiency, fast transient response and 99% duty cycle operation. It supports supply input voltage ranging from 4.5 V to 28 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. 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 200 kHz to 1 MHz by a resistor, and each channel runs 180° out of phase. The TPS51220 can also synchronize to the external clock, and the interleaving ratio can be adjusted by its duty. The TPS51220 is available in the 32 pin 5x5 QFN package and is specified from -40°C to 85°C.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | Fixed Frequency 99% Duty Cycle Peak Current Mode Notebook System Pwr Controlle datasheet (Rev. C) | 03 Jul 2009 | |
| User guide | TPS51220 Buck Controller Evaluation Module User's Guide (Rev. B) | PDF | HTML | 18 Feb 2022 | |
| Application note | Mosfet Driver Circuit Design Guide for TPS512xx (Rev. A) | 01 Apr 2019 | ||
| Application note | Independent Rail Dual Buck Converter using TPS51220 | 22 Nov 2013 | ||
| Application note | Intel Core i3, i5, i7 [Arrandale] Reference Design | 21 Jul 2010 |
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The TPS51220 is a dual peak-current mode, synchronous step-down controller with three low-dropout (LDO) regulators. It is optimized for 5 V/3.3 V notebook system power supplies. A 99% duty cycle operation enables designers to complete Li-ion battery applications from 2-cells to (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VQFN (RHB) | 32 | Ultra Librarian |
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