TPS51225 Series
5.5-V to 24-V, dual-synchronous buck controller with VREG5 always-on LDO
Manufacturer: Texas Instruments
Catalog(5 parts)
| Part | w/Supervisor▲▼ | Frequency - Switching▲▼ | Voltage - Supply▲▼ | Voltage - Supply▲▼ | Topology | Supplier Device Package | Package / Case | w/Sequencer▲▼ | Mounting Type | Voltage/Current - Output 2 | Number of Outputs▲▼ | Voltage/Current - Output 1 | Voltage/Current - Output 3▲▼ | Operating Temperature▲▼ | Operating Temperature▲▼ | w/LED Driver▲▼ | Main Purpose | Outputs and Type | Outputs and Type▲▼ | Utilized IC / Part | Voltage - Output▲▼ | Voltage - Input▲▼ | Voltage - Input▲▼ | Current - Output▲▼ | Board Type | Supplied Contents |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments TPS51225BRUKTPMIC - Voltage Regulators - Linear Switching 4 Output Step-Down (Buck) Synchronous (2), Linear (LDO) (2) 300kHz, 355kHz 20-WQFN (3x3) | 300000 Hz, 355000 Hz | 24 V | 5.5 V | Linear (LDO) (2), Step-Down (Buck) Synchronous (2) | 20-WQFN (3x3) | 20-WFQFN Exposed Pad | Surface Mount | Controller | 4 ul | Controller | 0.10000000149011612 A, 3 V | -40 °C | 85 °C | |||||||||||||
Texas Instruments TPS51225CRUKRPMIC - Voltage Regulators - Linear Switching 4 Output Step-Down (Buck) Synchronous (2), Linear (LDO) (2) 300kHz, 355kHz 20-WQFN (3x3) | 300000 Hz, 355000 Hz | 24 V | 5.5 V | Linear (LDO) (2), Step-Down (Buck) Synchronous (2) | 20-WQFN (3x3) | 20-WFQFN Exposed Pad | Surface Mount | Controller | 4 ul | Controller | 0.10000000149011612 A, 3 V | -40 °C | 85 °C | |||||||||||||
Texas Instruments TPS51225EVM-133TPS51225 D-CAP™ DC/DC, Step Down with LDO 4, Non-Isolated Outputs Evaluation Board | 300000 Hz, 355000 Hz | DC/DC, Step Down with LDO | Non-Isolated | 4 ul | TPS51225 | 3.299999952316284 V, 5 V | 20 V | 8 V | 0.10000000149011612 A, 10 A | Fully Populated | Board(s) | |||||||||||||||
Texas Instruments TPS51225BRUKRPMIC - Voltage Regulators - Linear Switching 4 Output Step-Down (Buck) Synchronous (2), Linear (LDO) (2) 300kHz, 355kHz 20-WQFN (3x3) | 300000 Hz, 355000 Hz | 24 V | 5.5 V | Linear (LDO) (2), Step-Down (Buck) Synchronous (2) | 20-WQFN (3x3) | 20-WFQFN Exposed Pad | Surface Mount | Controller | 4 ul | Controller | 0.10000000149011612 A, 3 V | -40 °C | 85 °C | |||||||||||||
Texas Instruments TPS51225RUKRPMIC - Voltage Regulators - Linear Switching 4 Output Step-Down (Buck) Synchronous (2), Linear (LDO) (1) 300kHz, 355kHz 20-WQFN (3x3) | 300000 Hz, 355000 Hz | 24 V | 5.5 V | 20-WQFN (3x3) | 20-WFQFN Exposed Pad | Surface Mount | Controller | 4 ul | Controller | 0.10000000149011612 A, 3 V | -40 °C | 85 °C |
Key Features
• Input Voltage Range: 5.5 V to 24 VOutput Voltages: 5 V and 3.3 V (Adjustable Range ±10%)Built-in, 100-mA, 5-V and 3.3-V LDOsClock Output for Charge-Pump±1% Reference AccuracyAdaptive On-time D-CAP Mode Control Architecture with 300kHz/355kHz Frequency SettingAuto-skip Light Load Operation (TPS51225/C)OOA Light Load Operation (TPS51225B)Internal 0.8-ms Voltage Servo Soft-StartLow-Side RDS(on)Current Sensing Scheme with 4500 ppm/°C Temperature CoefficientBuilt-in Output Discharge FunctionSeparate Enable Input for Switchers (TPS51225/B/C)Dedicated OC Setting TerminalsPower Good IndicatorOVP/UVP/OCP ProtectionNon-latch UVLO/OTP Protection20-Pin, 3 mm × 3 mm, QFN (RUK)Input Voltage Range: 5.5 V to 24 VOutput Voltages: 5 V and 3.3 V (Adjustable Range ±10%)Built-in, 100-mA, 5-V and 3.3-V LDOsClock Output for Charge-Pump±1% Reference AccuracyAdaptive On-time D-CAP Mode Control Architecture with 300kHz/355kHz Frequency SettingAuto-skip Light Load Operation (TPS51225/C)OOA Light Load Operation (TPS51225B)Internal 0.8-ms Voltage Servo Soft-StartLow-Side RDS(on)Current Sensing Scheme with 4500 ppm/°C Temperature CoefficientBuilt-in Output Discharge FunctionSeparate Enable Input for Switchers (TPS51225/B/C)Dedicated OC Setting TerminalsPower Good IndicatorOVP/UVP/OCP ProtectionNon-latch UVLO/OTP Protection20-Pin, 3 mm × 3 mm, QFN (RUK)
Description
AI
The TPS51225/B/C is a cost-effective, dual-synchronous buck controller targeted for notebook system-power supply solutions. It provides 5-V and 3.3-V LDOs and requires few external components. The 260-kHz VCLK output can be used to drive an external charge pump, generating gate drive voltage for the load switches without reducing the main converter efficiency. The TPS51225/B/C supports high efficiency, fast transient response and provides a combined power-good signal. Adaptive on-time, D-CAP™ control provides convenient and efficient operation. The device operates with supply input voltage ranging from 5.5 V to 24 V and supports output voltages of 5.0 V and 3.3 V. The TPS51225/B/C is available in a 20-pin, 3 mm × 3 mm, QFN package and is specified from –40°C to 85°C.
The TPS51225/B/C is a cost-effective, dual-synchronous buck controller targeted for notebook system-power supply solutions. It provides 5-V and 3.3-V LDOs and requires few external components. The 260-kHz VCLK output can be used to drive an external charge pump, generating gate drive voltage for the load switches without reducing the main converter efficiency. The TPS51225/B/C supports high efficiency, fast transient response and provides a combined power-good signal. Adaptive on-time, D-CAP™ control provides convenient and efficient operation. The device operates with supply input voltage ranging from 5.5 V to 24 V and supports output voltages of 5.0 V and 3.3 V. The TPS51225/B/C is available in a 20-pin, 3 mm × 3 mm, QFN package and is specified from –40°C to 85°C.