The TPS51221RTVT 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 TPS51221RTVT 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. Peak current mode supports stability operation with lower ESR capacitor and output accuracy. The high duty (99%) operation and 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 1MHz by a resistor, and each channel runs 180° out of phase. The TPS51221RTVT can also synchronize to the external clock, and the interleaving ratio can be adjusted by its duty. The TPS51221RTVT is available in the 32-pin 5×5 QFN package and is specified from -40°C to 85°C.
Feature
- Input Voltage Range: 4.5 V to 28 V
- Output Voltage Range: 1 V to 12 V
- Selectable Light Load Operation (Continuous / Auto Skip / Out-Of-Audio Skip)
- Programmable Droop Compensation
- Voltage Servo Adjustable Soft Start
- 200 kHz to 1 MHz Fixed Frequency PWM
- Current Mode Architecture
- 180° Phase Shift Between Channels
- Resistor or Inductor DCR Current Sensing
- Powergood Output for each channel
- OCL/OVP/UVP/UVLO protections
- Current Monitor Outputfor CH1
- Thermal Shutdown (Non-latch)
- Output Discharge Function (Disable option)
- Integrated Boot Strap MOSFET Switch
- QFN32 (RTV)
- APPLICATIONS
- Notebook Computer System and I/O Bus
- Point of load in LCD TV, MFP
