TPS56428 Series

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

Catalog

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

Part	Utilized IC / Part	Regulator Topology	Supplied Contents	Main Purpose	Voltage - Output	Outputs and Type	Outputs and Type	Current - Output	Voltage - Input [Max]	Voltage - Input [Min]	Frequency - Switching	Board Type	Voltage - Input (Max) [Max]	Voltage - Output (Max) [Max]	Topology	Output Type	Voltage - Input (Min) [Min]	Voltage - Output (Min/Fixed)	Package / Case [y]	Package / Case [x]	Package / Case	Operating Temperature [Max]	Operating Temperature [Min]	Function	Supplier Device Package	Number of Outputs	Output Configuration	Mounting Type
Texas Instruments TPS56428EVM-534	TPS56428	Buck	Board(s)	DC/DC Step Down	1.2 V	Non-Isolated	1	4 A	18 V	4.5 V	650 kHz	Fully Populated
Texas Instruments TPS56428DDA								4 A			650 kHz		18 V	7 V	Buck	Adjustable	4.5 V	0.6 V	3.9 mm	0.154 in	8-PowerSOIC	85 °C	-40 °C	Step-Down	8-SO PowerPad	1	Positive	Surface Mount
Texas Instruments TPS56428RHLR								4 A			650 kHz		18 V	7 V	Buck	Adjustable	4.5 V	0.6 V			14-VFQFN Exposed Pad	85 °C	-40 °C	Step-Down	14-VQFN (3.5x3.5)	1	Positive	Surface Mount
Texas Instruments TPS56428DDAR								4 A			650 kHz		18 V	7 V	Buck	Adjustable	4.5 V	0.6 V	3.9 mm	0.154 in	8-PowerSOIC	85 °C	-40 °C	Step-Down	8-SO PowerPad	1	Positive	Surface Mount

Catalog

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

Key Features

• D-CAP2™ Mode at 650kHz Switching for FastTransient Response, Ceramic Capacitor SupportVINInput Voltage Range: 4.5 V to 18 VOutput Voltage Range: 0.6 V to 7.0 VAdvanced Eco-mode for High Light LoadEfficiencyIntegrated FETs Optimized for Lower Duty Cycle– 68 mΩ (High Side) and 37 mΩ (Low Side)Shutdown Current Less Than 10 µA1% Initial Reference Voltage AccuracySoft Start with Pre-Bias Output SupportCycle By Cycle Over Current LimitPower Good OutputFixed Soft Start : 1.0msD-CAP2™ Mode at 650kHz Switching for FastTransient Response, Ceramic Capacitor SupportVINInput Voltage Range: 4.5 V to 18 VOutput Voltage Range: 0.6 V to 7.0 VAdvanced Eco-mode for High Light LoadEfficiencyIntegrated FETs Optimized for Lower Duty Cycle– 68 mΩ (High Side) and 37 mΩ (Low Side)Shutdown Current Less Than 10 µA1% Initial Reference Voltage AccuracySoft Start with Pre-Bias Output SupportCycle By Cycle Over Current LimitPower Good OutputFixed Soft Start : 1.0ms

Description

The TPS56428 is a D-CAP2 mode synchronous buck converter which is optimized for various power bus regulation needs with a cost effective, low component count, low standby current solution. The D-CAP2 mode control provides a fast transient response with no external compensation components. This adaptive on-time control supports seamless transition between PWM mode at higher load conditions and advanced Eco-mode operation at light loads. Advanced Eco-mode™ maintains higher efficiency during lighter load conditions than traditional skip mode. The TPS56428 also has a proprietary circuit 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 and its output voltage can be programmed between 0.6V and 7.0V. The device also features a fixed 1-ms soft start and a power-good output. The TPS56428 is available in 8-pin SOIC-8 and 14-pin QFN packages designed to operate over the ambient temperature range of –40°C to 85°C. The TPS56428 is a D-CAP2 mode synchronous buck converter which is optimized for various power bus regulation needs with a cost effective, low component count, low standby current solution. The D-CAP2 mode control provides a fast transient response with no external compensation components. This adaptive on-time control supports seamless transition between PWM mode at higher load conditions and advanced Eco-mode operation at light loads. Advanced Eco-mode™ maintains higher efficiency during lighter load conditions than traditional skip mode. The TPS56428 also has a proprietary circuit 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 and its output voltage can be programmed between 0.6V and 7.0V. The device also features a fixed 1-ms soft start and a power-good output. The TPS56428 is available in 8-pin SOIC-8 and 14-pin QFN packages designed to operate over the ambient temperature range of –40°C to 85°C.