TPS54428 Series

4.5V to 18V Input, 4-A Synchronous Step-Down SWIFT™ Converter with Eco-mode™

Catalog

4.5V to 18V Input, 4-A Synchronous Step-Down SWIFT™ Converter with Eco-mode™

Part	Voltage - Output	Board Type	Frequency - Switching	Current - Output	Main Purpose	Outputs and Type	Outputs and Type	Utilized IC / Part	Voltage - Input [Max]	Voltage - Input [Min]	Regulator Topology	Supplied Contents	Function	Number of Outputs	Voltage - Output (Min/Fixed)	Voltage - Input (Max) [Max]	Supplier Device Package	Topology	Voltage - Input (Min) [Min]	Mounting Type	Output Configuration	Operating Temperature [Max]	Operating Temperature [Min]	Output Type	Voltage - Output (Max) [Max]	Package / Case [y]	Package / Case [x]	Package / Case
Texas Instruments TPS54428EVM-052	1.05 V	Fully Populated	650 kHz	4 A	DC/DC Step Down	Non-Isolated	1	TPS54428	18 V	4.5 V	Buck	Board(s)
Texas Instruments TPS54428DDAR			650 kHz	4 A									Step-Down	1	0.76 V	18 V	8-SO PowerPad	Buck	4.5 V	Surface Mount	Positive	85 °C	-40 °C	Adjustable	7 V	3.9 mm	0.154 in	8-PowerSOIC
Texas Instruments TPS54428DRCR			650 kHz	4 A									Step-Down	1	0.76 V	18 V	10-VSON (3x3)	Buck	4.5 V	Surface Mount	Positive	85 °C	-40 °C	Adjustable	7 V			10-VFDFN Exposed Pad
Texas Instruments TPS54428DRCT			650 kHz	4 A									Step-Down	1	0.76 V	18 V	10-VSON (3x3)	Buck	4.5 V	Surface Mount	Positive	85 °C	-40 °C	Adjustable	7 V			10-VFDFN Exposed Pad

Catalog

4.5V to 18V Input, 4-A Synchronous Step-Down SWIFT™ Converter with Eco-mode™

Key Features

• D-CAP2™ Mode Enables Fast TransientResponseLow Output Ripple and Allows Ceramic OutputCapacitorWide VINInput Voltage Range: 4.5 V to 18 VOutput Voltage Range: 0.76 V to 7.0 VHighly Efficient Integrated FETs Optimizedfor Lower Duty Cycle Applications– 70 mΩ (High Side) and 53 mΩ (Low Side)High Efficiency, Less Than 10 µA at ShutdownHigh Initial Bandgap Reference AccuracyAdjustable Soft StartPre-Biased Soft Start650-kHz Switching Frequency (fSW)Cycle By Cycle Over Current LimitAuto-Skip Eco-mode™ for High Efficiency at LightLoadD-CAP2™ Mode Enables Fast TransientResponseLow Output Ripple and Allows Ceramic OutputCapacitorWide VINInput Voltage Range: 4.5 V to 18 VOutput Voltage Range: 0.76 V to 7.0 VHighly Efficient Integrated FETs Optimizedfor Lower Duty Cycle Applications– 70 mΩ (High Side) and 53 mΩ (Low Side)High Efficiency, Less Than 10 µA at ShutdownHigh Initial Bandgap Reference AccuracyAdjustable Soft StartPre-Biased Soft Start650-kHz Switching Frequency (fSW)Cycle By Cycle Over Current LimitAuto-Skip Eco-mode™ for High Efficiency at LightLoad

Description

The TPS54428 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54428 enables system designers to complete the suite of various end-equipment power bus regulators with a cost effective, low component count, low standby current solution. The main control loop for the TPS54428 uses the D-CAP2™ mode control that provides a fast transient response with no external compensation components. The adaptive on-time control supports seamless transition between PWM mode at higher load conditions and Eco-mode™ operation at light loads. Eco-mode™ allows the TPS54428 to maintain high efficiency during lighter load conditions. The TPS54428 also has a proprietary circuit that enables the device to adopt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18-V VIN input. The output voltage can be programmed between 0.76 V and 7.0 V. The device also features an adjustable soft start time. The TPS54428 is available in 8-pin DDA package and 10-pin DRC packages, and is designed to operate over the ambient temperature range of –40°C to 85°C. The TPS54428 is an adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54428 enables system designers to complete the suite of various end-equipment power bus regulators with a cost effective, low component count, low standby current solution. The main control loop for the TPS54428 uses the D-CAP2™ mode control that provides a fast transient response with no external compensation components. The adaptive on-time control supports seamless transition between PWM mode at higher load conditions and Eco-mode™ operation at light loads. Eco-mode™ allows the TPS54428 to maintain high efficiency during lighter load conditions. The TPS54428 also has a proprietary circuit that enables the device to adopt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18-V VIN input. The output voltage can be programmed between 0.76 V and 7.0 V. The device also features an adjustable soft start time. The TPS54428 is available in 8-pin DDA package and 10-pin DRC packages, and is designed to operate over the ambient temperature range of –40°C to 85°C.