TPS54334 Series

4.2V to 28V Input voltage, 3A Output current Synchronous buck Converter with 570kHz fixed frequency

Catalog(2 parts)

Part	Package / Case	Function	Voltage - Output (Max)▲▼	Voltage - Input (Min)▲▼	Voltage - Input (Max)▲▼	Voltage - Output (Min/Fixed)▲▼	Synchronous Rectifier▲▼	Operating Temperature▲▼	Operating Temperature▲▼	Supplier Device Package	Frequency - Switching▲▼	Output Type	Mounting Type	Number of Outputs▲▼	Output Configuration	Current - Output▲▼	Topology	Package / Case▲▼	Package / Case▲▼
Texas Instruments TPS54334DRCR Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 3A 10-VFDFN Exposed Pad	10-VFDFN Exposed Pad	Step-Down	24 V	4.199999809265137 V	28 V	0.800000011920929 V		85 °C	-40 °C	10-VSON (3x3)	570000 Hz	Adjustable	Surface Mount	1 ul	Positive	3 A	Buck
Texas Instruments TPS54334DDA Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 3A 8-PowerSOIC (0.154", 3.90mm Width)	8-PowerSOIC	Step-Down	24 V	4.199999809265137 V	28 V	0.800000011920929 V		150 °C	-40 °C	8-SO PowerPad	570000 Hz	Adjustable	Surface Mount	1 ul	Positive	3 A	Buck	0.003899999894201755 m	0.003911599982529879 m

Key Features

• Two 128mΩ/84mΩ MOSFETs for 3A ContinuousOutput CurrentPower GoodLow 2 µA Shutdown Quiescent Current0.8 V Internal Voltage Reference with ±1.5%Accuracy Over TemperatureFixed-Frequency Current Mode ControlPulse Skipping Boosts Efficiency at Light LoadsOvercurrent Protection for Both MOSFETs withHiccup Mode for Severe Fault ConditionsThermal and Overvoltage Transient ProtectionAvailable in Easy-to-Use 8-Pin SOICPowerPAD™ and 10-Pin SONMonotonic Start-Up into Pre-biased OutputsTwo 128mΩ/84mΩ MOSFETs for 3A ContinuousOutput CurrentPower GoodLow 2 µA Shutdown Quiescent Current0.8 V Internal Voltage Reference with ±1.5%Accuracy Over TemperatureFixed-Frequency Current Mode ControlPulse Skipping Boosts Efficiency at Light LoadsOvercurrent Protection for Both MOSFETs withHiccup Mode for Severe Fault ConditionsThermal and Overvoltage Transient ProtectionAvailable in Easy-to-Use 8-Pin SOICPowerPAD™ and 10-Pin SONMonotonic Start-Up into Pre-biased Outputs

Description

The TPS54334 is a 28-V, 3-A, low quiescent supply current (IQ), synchronous monolithic buck converter with integrated MOSFETs. The TPS54334 enables small designs by integrating the MOSFETs and implementing current mode control to reduce external component count. Efficiency is maximized through the integrated 128mΩ/84mΩ MOSFETs, low quiescent supply current and pulse skipping at light loads. Using the enable pin, shutdown supply current is reduced to 2 µA by entering a shutdown mode. The TPS54334 provides accurate regulation for a variety of loads with an accurate 1.5% voltage reference over temperature. Cycle by cycle current limiting on the high-side fet protects the TPS54334 in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. There is also a low-side sinking current limit which turns off the low-side MOSFET to prevent excessive reverse current. Hiccup protection will be triggered if the overcurrent condition has persisted for longer than the preset time. Thermal hiccup protection disables the part when die temperature exceeds thermal shutdown temperature and enables the part again after the built-in thermal hiccup time. The TPS54334 is a 28-V, 3-A, low quiescent supply current (IQ), synchronous monolithic buck converter with integrated MOSFETs. The TPS54334 enables small designs by integrating the MOSFETs and implementing current mode control to reduce external component count. Efficiency is maximized through the integrated 128mΩ/84mΩ MOSFETs, low quiescent supply current and pulse skipping at light loads. Using the enable pin, shutdown supply current is reduced to 2 µA by entering a shutdown mode. The TPS54334 provides accurate regulation for a variety of loads with an accurate 1.5% voltage reference over temperature. Cycle by cycle current limiting on the high-side fet protects the TPS54334 in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. There is also a low-side sinking current limit which turns off the low-side MOSFET to prevent excessive reverse current. Hiccup protection will be triggered if the overcurrent condition has persisted for longer than the preset time. Thermal hiccup protection disables the part when die temperature exceeds thermal shutdown temperature and enables the part again after the built-in thermal hiccup time.