TPS51221 Series

3-V to 28-V, synchronous dual-output peak current mode buck controller for notebook power

Catalog

3-V to 28-V, synchronous dual-output peak current mode buck controller for notebook power

Part	w/Supervisor	Voltage/Current - Output 1	Operating Temperature [Max]	Operating Temperature [Min]	Voltage/Current - Output 3	w/Sequencer	Topology	Mounting Type	Voltage - Supply [Min]	Voltage - Supply [Max]	Supplier Device Package	Voltage/Current - Output 2	Frequency - Switching [Max]	Frequency - Switching [Min]	Number of Outputs	w/LED Driver
Texas Instruments TPS51221RTVT		Controller	85 °C	-40 °C	5 V 100 mA		Linear (LDO) (2) Step-Down (Buck) Synchronous (1)	Surface Mount	4.5 V	28 V	32-WQFN (5x5)	3.3 V 10 mA	1 MHz	200 kHz	3
Texas Instruments TPS51221RTVR		Controller	85 °C	-40 °C	5 V 100 mA		Linear (LDO) (2) Step-Down (Buck) Synchronous (1)	Surface Mount	4.5 V	28 V	32-WQFN (5x5)	3.3 V 10 mA	1 MHz	200 kHz	3

Catalog

3-V to 28-V, synchronous dual-output peak current mode buck controller for notebook power

Key Features

• Input Voltage Range: 4.5 V to 28 VOutput Voltage Range: 1 V to 12 VSelectable Light Load Operation (Continuous / Auto Skip / Out-Of-Audio™ Skip)Programmable Droop CompensationVoltage Servo Adjustable Soft Start200 kHz to 1 MHz Fixed Frequency PWMCurrent Mode Architecture180° Phase Shift Between ChannelsResistor or Inductor DCR Current SensingPowergood Output for each channelOCL/OVP/UVP/UVLO protectionsCurrent Monitor Output for CH1Thermal Shutdown (Non-latch)Output Discharge Function (Disable option)Integrated Boot Strap MOSFET SwitchQFN32 (RTV)APPLICATIONSNotebook Computer System and I/O BusPoint of load in LCD TV, MFPOut-Of-Audio, PowerPAD are trademarks of Texas Instruments.Input Voltage Range: 4.5 V to 28 VOutput Voltage Range: 1 V to 12 VSelectable Light Load Operation (Continuous / Auto Skip / Out-Of-Audio™ Skip)Programmable Droop CompensationVoltage Servo Adjustable Soft Start200 kHz to 1 MHz Fixed Frequency PWMCurrent Mode Architecture180° Phase Shift Between ChannelsResistor or Inductor DCR Current SensingPowergood Output for each channelOCL/OVP/UVP/UVLO protectionsCurrent Monitor Output for CH1Thermal Shutdown (Non-latch)Output Discharge Function (Disable option)Integrated Boot Strap MOSFET SwitchQFN32 (RTV)APPLICATIONSNotebook Computer System and I/O BusPoint of load in LCD TV, MFPOut-Of-Audio, PowerPAD are trademarks of Texas Instruments.

Description

The TPS51221 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 TPS51221 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 TPS51221 can also synchronize to the external clock, and the interleaving ratio can be adjusted by its duty. The TPS51221 is available in the 32-pin 5×5 QFN package and is specified from -40°C to 85°C. The TPS51221 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 TPS51221 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 TPS51221 can also synchronize to the external clock, and the interleaving ratio can be adjusted by its duty. The TPS51221 is available in the 32-pin 5×5 QFN package and is specified from -40°C to 85°C.