TPS53311 Series

2.9V to 6V Input, 3A Synchronous Step-Down Converter with Eco-Mode and Smooth PWM

Catalog

2.9V to 6V Input, 3A Synchronous Step-Down Converter with Eco-Mode and Smooth PWM

Part	Number of Outputs	Function	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package	Mounting Type	Topology	Voltage - Output (Min/Fixed)	Frequency - Switching	Voltage - Output (Max) [Max]	Synchronous Rectifier	Current - Output	Output Type	Voltage - Input (Min) [Min]	Voltage - Input (Max) [Max]	Output Configuration	Package / Case
Texas Instruments TPS53311RGTR	1	Step-Down	85 °C	-40 °C	16-VQFN (3x3)	Surface Mount	Buck	0.6 V	1.1 MHz	5.04 V		3 A	Adjustable	2.9 V	6 V	Positive	16-VFQFN Exposed Pad

Catalog

2.9V to 6V Input, 3A Synchronous Step-Down Converter with Eco-Mode and Smooth PWM

Key Features

• 95.5% Maximum EfficiencyContinuous 3-A Output CurrentSupports All MLCC Output CapacitorSmoothPWM™ Auto-Skip Eco-mode™ for Light-Load EfficiencyVoltage Mode ControlSupports Master-Slave Interleaved OperationSynchronization up to ±20% of Nominal FrequencyConversion Voltage Range From 2.9 V to 6 VSoft-Stop Output Discharge During DisableAdjustable Output Voltage Ranging From 0.6 V to 0.84 V × VINOvercurrent, Overvoltage, and Overtemperature ProtectionSmall, 3 mm × 3 mm, 16-Pin VQFN PackageOpen-Drain Power Good IndicationInternal Boot Strap SwitchLow RDS(on), 24 mΩ With 3.3-V Input and 19-mΩ With 5-V InputSupports Prebias Start-Up Functionality95.5% Maximum EfficiencyContinuous 3-A Output CurrentSupports All MLCC Output CapacitorSmoothPWM™ Auto-Skip Eco-mode™ for Light-Load EfficiencyVoltage Mode ControlSupports Master-Slave Interleaved OperationSynchronization up to ±20% of Nominal FrequencyConversion Voltage Range From 2.9 V to 6 VSoft-Stop Output Discharge During DisableAdjustable Output Voltage Ranging From 0.6 V to 0.84 V × VINOvercurrent, Overvoltage, and Overtemperature ProtectionSmall, 3 mm × 3 mm, 16-Pin VQFN PackageOpen-Drain Power Good IndicationInternal Boot Strap SwitchLow RDS(on), 24 mΩ With 3.3-V Input and 19-mΩ With 5-V InputSupports Prebias Start-Up Functionality

Description

The TPS53311 provides a fully integrated 3-V to 5-V VINintegrated synchronous FET converter solution with 16 total components, in 200 mm2of PCB area. Due to the low RDS(on)and TI Proprietary SmoothPWM™ skip mode of operation, it enables 95.5% peak efficiency, and over 90% efficiency at loads as light as 100 mA. It requires only two 22-µF ceramic output capacitors for a power-dense, 3-A solution. The TPS53311 features a 1.1-MHz switching frequency, SKIP mode operation support, prebias start-up, internal soft start, output soft discharge, internal VBST switch, power good, EN/input UVLO, overcurrent, overvoltage, undervoltage, and overtemperature protections and all ceramic output capacitor support. It supports supply voltage from 2.9 V to 3.5 V and conversion voltage from 2.9 V to 6 V, and output voltage is adjustable from 0.6 V to 0.84 V × VIN. The TPS53311 is available in the 3 mm × 3 mm 16-pin VQFN package (Green RoHs compliant and Pb free) and operates between –40°C and 85°C. The TPS53311 provides a fully integrated 3-V to 5-V VINintegrated synchronous FET converter solution with 16 total components, in 200 mm2of PCB area. Due to the low RDS(on)and TI Proprietary SmoothPWM™ skip mode of operation, it enables 95.5% peak efficiency, and over 90% efficiency at loads as light as 100 mA. It requires only two 22-µF ceramic output capacitors for a power-dense, 3-A solution. The TPS53311 features a 1.1-MHz switching frequency, SKIP mode operation support, prebias start-up, internal soft start, output soft discharge, internal VBST switch, power good, EN/input UVLO, overcurrent, overvoltage, undervoltage, and overtemperature protections and all ceramic output capacitor support. It supports supply voltage from 2.9 V to 3.5 V and conversion voltage from 2.9 V to 6 V, and output voltage is adjustable from 0.6 V to 0.84 V × VIN. The TPS53311 is available in the 3 mm × 3 mm 16-pin VQFN package (Green RoHs compliant and Pb free) and operates between –40°C and 85°C.