TPS568231 Series

3.8-V to 17-V, 8-A synchronous buck converter with D-CAP3 control

Catalog

3.8-V to 17-V, 8-A synchronous buck converter with D-CAP3 control

Part	Synchronous Rectifier	Mounting Type	Voltage - Input (Min) [Min]	Current - Output	Voltage - Output (Max) [Max]	Supplier Device Package	Supplier Device Package [x]	Supplier Device Package [y]	Output Configuration	Voltage - Input (Max) [Max]	Output Type	Package / Case	Function	Topology	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Output (Min/Fixed)	Number of Outputs	Frequency - Switching
Texas Instruments TPS568231RNNR		Surface Mount	3.8 V	8 A	5.5 V	18-VQFN-HR	3.5	3.5	Positive	17 V	Adjustable	18-PowerVFQFN	Step-Down	Buck	-40 °C	125 ¯C	0.6 V	1	1.2 MHz 400 kHz 800 kHz

Catalog

3.8-V to 17-V, 8-A synchronous buck converter with D-CAP3 control

Key Features

• 4.5-V to 17-V input range without external bias3.8-V to 17-V input range with external biasSupports 8-A continuous output currentIntegrated 7.8-mΩ and 3.2-mΩ MOSFETs0.6-V ±1% reference voltage across a –40°C to 125°C junction range0.6-V to 5.5-V output voltage range146-µA low quiescent currentD-CAP3™ control mode for fast transient responseSupports ceramic output capacitorsSelectable fSWof 400 kHz, 800 kHz, and 1200 kHzSelectable FCCM (forced continuous conduction mode) for tight output voltage rippleSelectable Eco-mode™ (auto skip mode) for high light-load efficiencyOptional external 5-V bias for enhanced efficiencyPrebiased start-up capabilityAdjustable soft start with a default 1.2-ms soft-start timePower-good indicator to monitor output voltageTwo adjustable current limit settings with hiccup restartNon-latched protections for UV, OV, OT, and UVLOPin-to-pin compatible with 8-ATPS568215, and 12-ATPS56C231andTPS56C215–40°C to 125°C operating junction temperature3.5-mm × 3.5-mm, 18-pin HotRod™ QFN package4.5-V to 17-V input range without external bias3.8-V to 17-V input range with external biasSupports 8-A continuous output currentIntegrated 7.8-mΩ and 3.2-mΩ MOSFETs0.6-V ±1% reference voltage across a –40°C to 125°C junction range0.6-V to 5.5-V output voltage range146-µA low quiescent currentD-CAP3™ control mode for fast transient responseSupports ceramic output capacitorsSelectable fSWof 400 kHz, 800 kHz, and 1200 kHzSelectable FCCM (forced continuous conduction mode) for tight output voltage rippleSelectable Eco-mode™ (auto skip mode) for high light-load efficiencyOptional external 5-V bias for enhanced efficiencyPrebiased start-up capabilityAdjustable soft start with a default 1.2-ms soft-start timePower-good indicator to monitor output voltageTwo adjustable current limit settings with hiccup restartNon-latched protections for UV, OV, OT, and UVLOPin-to-pin compatible with 8-ATPS568215, and 12-ATPS56C231andTPS56C215–40°C to 125°C operating junction temperature3.5-mm × 3.5-mm, 18-pin HotRod™ QFN package

Description

The TPS568231 is a small, high-efficiency, synchronous buck converter with an adaptive on-time D-CAP3 control mode. Because external compensation is not required, the device is easy to use and requires few external components. The device is well-suited for space-constrained data center applications. The TPS568231 has competitive features including a very accurate reference voltage, fast load transient response, and no requirement for external compensation, adjustable current limit, and both Eco-mode and FCCM operation modes for selection at light-load condition through configuration of MODE pin. To attain high efficiency at light load, Eco-mode can be selected. To support tight output voltage ripple requirement, FCCM can be selected. The TPS568231 operates from –40°C to 125°C junction temperature. The TPS568231 is a small, high-efficiency, synchronous buck converter with an adaptive on-time D-CAP3 control mode. Because external compensation is not required, the device is easy to use and requires few external components. The device is well-suited for space-constrained data center applications. The TPS568231 has competitive features including a very accurate reference voltage, fast load transient response, and no requirement for external compensation, adjustable current limit, and both Eco-mode and FCCM operation modes for selection at light-load condition through configuration of MODE pin. To attain high efficiency at light load, Eco-mode can be selected. To support tight output voltage ripple requirement, FCCM can be selected. The TPS568231 operates from –40°C to 125°C junction temperature.