TPS40002 Series
Low Input (2.25V-5.5V) 600 kHz Frequency, Synchronous Buck Controller, Source Only
Manufacturer: Texas Instruments
Catalog(2 parts)
| Part | Number of Outputs▲▼ | Output Configuration | Voltage - Supply (Vcc/Vdd)▲▼ | Voltage - Supply (Vcc/Vdd)▲▼ | Operating Temperature▲▼ | Operating Temperature▲▼ | Clock Sync▲▼ | Output Phases▲▼ | Control Features | Topology | Output Type | Function | Synchronous Rectifier▲▼ | Supplier Device Package | Duty Cycle (Max)▲▼ | Mounting Type | Frequency - Switching▲▼ | Package / Case |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 ul | Positive | 5.5 V | 2.25 V | 85 °C | -40 °C | 1 ul | Current Limit, Enable, Soft Start | Buck | Transistor Driver | Step-Down | 10-HVSSOP | 0.9300000071525574 ul | Surface Mount | 600000 Hz | 10-MSOP, 10-PowerTFSOP | |||
1 ul | Positive | 5.5 V | 2.25 V | 85 °C | -40 °C | 1 ul | Current Limit, Enable, Soft Start | Buck | Transistor Driver | Step-Down | 10-HVSSOP | 0.9300000071525574 ul | Surface Mount | 600000 Hz | 10-MSOP, 10-PowerTFSOP |
Key Features
• Operating Input Voltage 2.25 V to 5.5 VOutput Voltage as Low as 0.7 V1% Internal 0.7 V ReferencePredictive Gate Drive™ N-Channel MOSFET Drivers for Higher EfficiencyExternally Adjustable Soft-Start and Overcurrent LimitSource-Only Current or Source/Sink CurrentVersions for Starting into VOUTPre-Bias10-Lead MSOP PowerPad™ Package for Higher PerformanceThermal ShutdownInternal Boostrap DiodeFixed-Frequency, Voltage-Mode ControlTPS40000/1/4 300-kHzTPS40002/3/5 600-kHzAPPLICATIONSNetworking EquipmentTelecom EquipmentBase StationsServersDSP PowerPower ModulesPowerPAD™ and Predictive Gate Drive™ are trademarks of Texas Instruments Incorporated.Operating Input Voltage 2.25 V to 5.5 VOutput Voltage as Low as 0.7 V1% Internal 0.7 V ReferencePredictive Gate Drive™ N-Channel MOSFET Drivers for Higher EfficiencyExternally Adjustable Soft-Start and Overcurrent LimitSource-Only Current or Source/Sink CurrentVersions for Starting into VOUTPre-Bias10-Lead MSOP PowerPad™ Package for Higher PerformanceThermal ShutdownInternal Boostrap DiodeFixed-Frequency, Voltage-Mode ControlTPS40000/1/4 300-kHzTPS40002/3/5 600-kHzAPPLICATIONSNetworking EquipmentTelecom EquipmentBase StationsServersDSP PowerPower ModulesPowerPAD™ and Predictive Gate Drive™ are trademarks of Texas Instruments Incorporated.
Description
AI
The TPS4000x are controllers for low-voltage, non-isolated synchronous buck regulators. These controllers drive an N-channel MOSFET for the primary buck switch, and an N-channel MOSFET for the synchronous rectifier switch, thereby achieving very high-efficiency power conversion. In addition, the device controls the delays from main switch off to rectifier turn-on and from rectifier turn-off to main switch turn-on in such a way as to minimize diode losses (both conduction and recovery) in the synchronous rectifier with TI’s proprietary Predictive Gate Drive™ technology. The reduction in these losses is significant and increases efficiency. For a given converter power level, smaller FETs can be used, or heat sinking can be reduced or even eliminated.
The current-limit threshold is adjustable with a single resistor connected to the device. The TPS4000x controllers implement a closed-loop soft start function. Startup ramp time is set by a single external capacitor connected to the SS/SD pin. The SS/SD pin is also used for shutdown.
The TPS4000x are controllers for low-voltage, non-isolated synchronous buck regulators. These controllers drive an N-channel MOSFET for the primary buck switch, and an N-channel MOSFET for the synchronous rectifier switch, thereby achieving very high-efficiency power conversion. In addition, the device controls the delays from main switch off to rectifier turn-on and from rectifier turn-off to main switch turn-on in such a way as to minimize diode losses (both conduction and recovery) in the synchronous rectifier with TI’s proprietary Predictive Gate Drive™ technology. The reduction in these losses is significant and increases efficiency. For a given converter power level, smaller FETs can be used, or heat sinking can be reduced or even eliminated.
The current-limit threshold is adjustable with a single resistor connected to the device. The TPS4000x controllers implement a closed-loop soft start function. Startup ramp time is set by a single external capacitor connected to the SS/SD pin. The SS/SD pin is also used for shutdown.