TPS51275 Series
5.5-V to 24-V, dual-synchronous buck controller with Out-of-Audio™ mode and 3.2 ms soft start
Manufacturer: Texas Instruments
Catalog(4 parts)
| Part | w/Supervisor▲▼ | Topology | Operating Temperature▲▼ | Operating Temperature▲▼ | Number of Outputs▲▼ | Supplier Device Package | Package / Case | Frequency - Switching▲▼ | Voltage/Current - Output 3▲▼ | Voltage - Supply▲▼ | Voltage - Supply▲▼ | Voltage/Current - Output 1 | w/LED Driver▲▼ | Voltage/Current - Output 2 | Mounting Type | w/Sequencer▲▼ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments TPS51275CRUKTPMIC - Voltage Regulators - Linear Switching 4 Output Step-Down (Buck) Synchronous (2), Linear (LDO) (2) 300kHz, 355kHz 20-WQFN (3x3) | Linear (LDO) (2), Step-Down (Buck) Synchronous (2) | -40 °C | 85 °C | 4 ul | 20-WQFN (3x3) | 20-WFQFN Exposed Pad | 300000 Hz, 355000 Hz | 0.10000000149011612 A, 3.299999952316284 V | 24 V | 5 V | Controller | Controller | Surface Mount | |||
Texas Instruments TPS51275RUKRPMIC - Voltage Regulators - Linear Switching 4 Output Step-Down (Buck) Synchronous (2), Linear (LDO) (2) 300kHz, 355kHz 20-WQFN (3x3) | Linear (LDO) (2), Step-Down (Buck) Synchronous (2) | -40 °C | 85 °C | 4 ul | 20-WQFN (3x3) | 20-WFQFN Exposed Pad | 300000 Hz, 355000 Hz | 0.10000000149011612 A, 3.299999952316284 V | 24 V | 5 V | Controller | Controller | Surface Mount | |||
Texas Instruments TPS51275BRUKRPMIC - Voltage Regulators - Linear Switching 4 Output Step-Down (Buck) Synchronous (2), Linear (LDO) (2) 300kHz, 355kHz 20-WQFN (3x3) | Linear (LDO) (2), Step-Down (Buck) Synchronous (2) | -40 °C | 85 °C | 4 ul | 20-WQFN (3x3) | 20-WFQFN Exposed Pad | 300000 Hz, 355000 Hz | 0.10000000149011612 A, 3.299999952316284 V | 24 V | 5 V | Controller | Controller | Surface Mount | |||
Texas Instruments TPS51275RUKTPMIC - Voltage Regulators - Linear Switching 4 Output Step-Down (Buck) Synchronous (2), Linear (LDO) (2) 300kHz, 355kHz 20-WQFN (3x3) | Linear (LDO) (2), Step-Down (Buck) Synchronous (2) | -40 °C | 85 °C | 4 ul | 20-WQFN (3x3) | 20-WFQFN Exposed Pad | 300000 Hz, 355000 Hz | 0.10000000149011612 A, 3.299999952316284 V | 24 V | 5 V | Controller | Controller | Surface Mount |
Key Features
• Input Voltage Range: 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 ControlArchitecture with 300-kHz and 355-kHz FrequencySettingOut-of-Audio™ (OOA) Light-Load OperationInternal 3.2-ms Voltage Servo Soft-StartLow-Side RDS(on)Current Sensing SchemeBuilt-In Output Discharge FunctionSeparate Enable Input for SwitchersDedicated OC Setting TerminalsPower Good IndicatorOVP, UVP, and OCP ProtectionNon-Latch UVLO and OTP Protection20-Pin, 3-mm × 3-mm, WQFN (RUK) PackageInput Voltage Range: 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 ControlArchitecture with 300-kHz and 355-kHz FrequencySettingOut-of-Audio™ (OOA) Light-Load OperationInternal 3.2-ms Voltage Servo Soft-StartLow-Side RDS(on)Current Sensing SchemeBuilt-In Output Discharge FunctionSeparate Enable Input for SwitchersDedicated OC Setting TerminalsPower Good IndicatorOVP, UVP, and OCP ProtectionNon-Latch UVLO and OTP Protection20-Pin, 3-mm × 3-mm, WQFN (RUK) Package
Description
AI
The TPS51275B-1 device is a cost-effective, dual-synchronous buck controller targeted for notebook system-power supply solutions. The device has 5-V and 3.3-V low-dropout regulators (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 TPS51275B-1 device 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 a supply input voltage ranging from 5 to 24 V and supports output voltages of 5 V and 3.3 V. The TPS51275B-1 device is available in a 20-pin, 3-mm × 3-mm, WQFN package and is specified from –40°C to 85°C.
The TPS51275B-1 device is a cost-effective, dual-synchronous buck controller targeted for notebook system-power supply solutions. The device has 5-V and 3.3-V low-dropout regulators (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 TPS51275B-1 device 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 a supply input voltage ranging from 5 to 24 V and supports output voltages of 5 V and 3.3 V. The TPS51275B-1 device is available in a 20-pin, 3-mm × 3-mm, WQFN package and is specified from –40°C to 85°C.