TPS51125 Series
4.5-V to 28-V, dual-synchronous buck controller with 100-mA LDOs and flexible external components
Manufacturer: Texas Instruments
Catalog(5 parts)
| Part | Outputs and Type▲▼ | Outputs and Type | Current - Output▲▼ | Frequency - Switching▲▼ | Frequency - Switching▲▼ | Voltage - Output▲▼ | Main Purpose | Supplied Contents | Utilized IC / Part | Voltage - Input▲▼ | Voltage - Input▲▼ | Board Type | Synchronous Rectifier▲▼ | Output Type | Operating Temperature▲▼ | Operating Temperature▲▼ | Number of Outputs▲▼ | Voltage - Supply (Vcc/Vdd)▲▼ | Voltage - Supply (Vcc/Vdd)▲▼ | Output Phases▲▼ | Topology | Function | Package / Case | Clock Sync▲▼ | Supplier Device Package | Mounting Type | Output Configuration |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments TPS51125EVMTPS51125 D-CAP™ DC/DC, Step Down 2, Non-Isolated Outputs Evaluation Board | 2 ul | Non-Isolated | 8 A | 305000 Hz | 245000 Hz | 3.299999952316284 V, 5 V | DC/DC, Step Down | Board(s) | TPS51125 | 8 V | 25 V | Fully Populated | |||||||||||||||
Texas Instruments TPS51125ARGERBuck Regulator Positive Output Step-Down DC-DC Controller IC 24-VQFN (4x4) | Transistor Driver | 85 °C | -40 °C | 2 ul | 5.5 V | 28 V | 1 ul | Buck | Step-Down | 24-VFQFN Exposed Pad | 24-VQFN (4x4) | Surface Mount | Positive | ||||||||||||||
Texas Instruments TPS51125RGERBuck Regulator Positive Output Step-Down DC-DC Controller IC 24-VQFN (4x4) | Transistor Driver | 85 °C | -40 °C | 2 ul | 5.5 V | 28 V | 1 ul | Buck | Step-Down | 24-VFQFN Exposed Pad | 24-VQFN (4x4) | Surface Mount | Positive | ||||||||||||||
Texas Instruments TPS51125RGETG4Buck Regulator Positive Output Step-Down DC-DC Controller IC 24-VQFN (4x4) | Transistor Driver | 85 °C | -40 °C | 2 ul | 5.5 V | 28 V | 1 ul | Buck | Step-Down | 24-VFQFN Exposed Pad | 24-VQFN (4x4) | Surface Mount | Positive | ||||||||||||||
Texas Instruments TPS51125ARGETBuck Regulator Positive Output Step-Down DC-DC Controller IC 24-VQFN (4x4) | Transistor Driver | 85 °C | -40 °C | 2 ul | 5.5 V | 28 V | 1 ul | Buck | Step-Down | 24-VFQFN Exposed Pad | 24-VQFN (4x4) | Surface Mount | Positive |
Key Features
• Wide Input Voltage Range: 5.5 V to 28 VOutput Voltage Range: 2 V to 5.5 VBuilt-in 100-mA 5-V/3.3-V LDO with SwitchesBuilt-in 1% 2-V Reference OutputWith/Without Out-of-Audio™ Mode Selectable Light Load and PWM only OperationInternal 1.6-ms Voltage Servo SoftstartAdaptive On-Time Control Architecture with Four Selectable Frequency Setting4500 ppm/°C RDS(on)Current SensingBuilt-In Output DischargePower Good OutputBuilt-in OVP/UVP/OCPThermal Shutdown (Non-latch)QFN24 (RGE)Wide Input Voltage Range: 5.5 V to 28 VOutput Voltage Range: 2 V to 5.5 VBuilt-in 100-mA 5-V/3.3-V LDO with SwitchesBuilt-in 1% 2-V Reference OutputWith/Without Out-of-Audio™ Mode Selectable Light Load and PWM only OperationInternal 1.6-ms Voltage Servo SoftstartAdaptive On-Time Control Architecture with Four Selectable Frequency Setting4500 ppm/°C RDS(on)Current SensingBuilt-In Output DischargePower Good OutputBuilt-in OVP/UVP/OCPThermal Shutdown (Non-latch)QFN24 (RGE)
Description
AI
The TPS51125A 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 270-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’s efficiency. The TPS51125A supports high efficiency, fast transient response and provides a combined power-good signal. Out-of-Audio mode light-load operation enables low acoustic noise at much higher efficiency than conventional forced PWM operation. Adaptive on-time D-CAP control provides convenient and efficient operation. The part operates with supply input voltages ranging from 5.5 V to 28 V and supports output voltages from 2 V to 5.5 V. The TPS51125A is available in a 24-pin QFN package and is specified from -40°C to 85°C ambient temperature range.
The TPS51125A 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 270-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’s efficiency. The TPS51125A supports high efficiency, fast transient response and provides a combined power-good signal. Out-of-Audio mode light-load operation enables low acoustic noise at much higher efficiency than conventional forced PWM operation. Adaptive on-time D-CAP control provides convenient and efficient operation. The part operates with supply input voltages ranging from 5.5 V to 28 V and supports output voltages from 2 V to 5.5 V. The TPS51125A is available in a 24-pin QFN package and is specified from -40°C to 85°C ambient temperature range.