TPS51113 Series

4.5-V to 13.2-V, 300 kHz synchronous buck controller with high current gate driver

Catalog

4.5-V to 13.2-V, 300 kHz synchronous buck controller with high current gate driver

Part	Operating Temperature [Max]	Operating Temperature [Min]	Duty Cycle (Max) [Max]	Function	Topology	Mounting Type	Package / Case	Supplier Device Package	Control Features	Output Configuration	Clock Sync	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Output Type	Number of Outputs	Output Phases	Frequency - Switching	Synchronous Rectifier
Texas Instruments TPS51113DRCT	85 °C	-40 °C	72 %	Step-Down	Buck	Surface Mount	10-VFDFN Exposed Pad	10-VSON (3x3)	Enable Power Good	Positive		4.5 V	13.2 V	Transistor Driver	1	1	300 kHz

Catalog

4.5-V to 13.2-V, 300 kHz synchronous buck controller with high current gate driver

Key Features

• Flexible Power Rails: 5 V to 12 VReference: 800 mV ± 0.8%Voltage Mode ControlSupport Pre-biased StartupProgrammable Overcurrent Protection with Low-Side RDS(on)Current SensingFixed 300-kHz (TPS51113) and 600-kHz (TPS51163) Switching FrequencyUV/OV Protections and Power Good IndicatorInternal Soft-startIntegrated High-Current Drivers Powered by VDD10-Pin 3 × 3 SON PackageAPPLICATIONSServer and Desktop Computer Subsystem Power Supplies (MCH, IOCH, PCI, Termination)Distributed Power SuppliesGeneral DC-DC ConvertersFlexible Power Rails: 5 V to 12 VReference: 800 mV ± 0.8%Voltage Mode ControlSupport Pre-biased StartupProgrammable Overcurrent Protection with Low-Side RDS(on)Current SensingFixed 300-kHz (TPS51113) and 600-kHz (TPS51163) Switching FrequencyUV/OV Protections and Power Good IndicatorInternal Soft-startIntegrated High-Current Drivers Powered by VDD10-Pin 3 × 3 SON PackageAPPLICATIONSServer and Desktop Computer Subsystem Power Supplies (MCH, IOCH, PCI, Termination)Distributed Power SuppliesGeneral DC-DC Converters

Description

The TPS51113 and TPS51163 are cost-optimized, feature rich, single-channel synchronous-buck controllers that operates from a single 4.5-V to 13.2-V supply and can convert an input voltage as low as 1.5 V. The controller implements voltage mode control with a fixed 300-kHz (TPS51113) and 600-kHz (TPS51163) switching frequency. The overcurrent (OC) protection employs the low-side RDS(on)current sensing and has user-programmable threshold. The OC threshold is set by the resistor from LDRV_OC pin to GND. The resistor value is read when the over-current programming circuit applies 10 µA of current to the LDRV_OC pin during the calibration phase of the start-up sequence. The TPS51113/TPS51163 also supports output pre-biased startup. The strong gate drivers with low deadtime allow for the utilization of larger MOSFETs to achieve higher efficiency. An adaptive anti-cross conduction scheme is used to prevent shoot-through between the power FETs. The TPS51113 and TPS51163 are cost-optimized, feature rich, single-channel synchronous-buck controllers that operates from a single 4.5-V to 13.2-V supply and can convert an input voltage as low as 1.5 V. The controller implements voltage mode control with a fixed 300-kHz (TPS51113) and 600-kHz (TPS51163) switching frequency. The overcurrent (OC) protection employs the low-side RDS(on)current sensing and has user-programmable threshold. The OC threshold is set by the resistor from LDRV_OC pin to GND. The resistor value is read when the over-current programming circuit applies 10 µA of current to the LDRV_OC pin during the calibration phase of the start-up sequence. The TPS51113/TPS51163 also supports output pre-biased startup. The strong gate drivers with low deadtime allow for the utilization of larger MOSFETs to achieve higher efficiency. An adaptive anti-cross conduction scheme is used to prevent shoot-through between the power FETs.