TPS51221 Series
3-V to 28-V, synchronous dual-output peak current mode buck controller for notebook power
Manufacturer: Texas Instruments
Catalog(1 parts)
| Part | Supplier Device Package | Mounting Type | Number of Outputs▲▼ | Voltage/Current - Output 3▲▼ | w/Sequencer▲▼ | Frequency - Switching▲▼ | Frequency - Switching▲▼ | Voltage/Current - Output 1 | w/LED Driver▲▼ | Voltage/Current - Output 2▲▼ | Operating Temperature▲▼ | Operating Temperature▲▼ | w/Supervisor▲▼ | Voltage - Supply▲▼ | Voltage - Supply▲▼ | Topology |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments TPS51221RTVTPMIC - Voltage Regulators - Linear Switching 3 Output Step-Down (Buck) Synchronous (1), Linear (LDO) (2) 200kHz ~ 1MHz 32-WQFN (5x5) | 32-WQFN (5x5) | Surface Mount | 3 ul | 0.10000000149011612 A, 5 V | 200000 Hz | 1000000 Hz | Controller | 0.009999999776482582 A, 3.299999952316284 V | -40 °C | 85 °C | 28 V | 4.5 V | Linear (LDO) (2), Step-Down (Buck) Synchronous (1) |
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
AI
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.