TPS54494 Series

4A Dual Channel Synchronous Step-Down Switcher with Integrated FET

Catalog

4A Dual Channel Synchronous Step-Down Switcher with Integrated FET

Part	Board Type	Current - Output	Utilized IC / Part	Voltage - Input [Max]	Voltage - Input [Min]	Main Purpose	Outputs and Type	Outputs and Type	Frequency - Switching	Voltage - Output	Supplied Contents	Regulator Topology	Output Configuration	Function	Voltage - Input (Max) [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Output Type	Topology	Voltage - Output (Min/Fixed)	Mounting Type	Voltage - Output (Max) [Max]	Package / Case	Voltage - Input (Min) [Min]	Number of Outputs	Supplier Device Package	Package / Case
Texas Instruments TPS54494EVM-057	Fully Populated	2 A 4 A	TPS54494	18 V	5 V	DC/DC Step Down	2	Non-Isolated	700 kHz	1.5 V 3.3 V	Board(s)	Buck
Texas Instruments TPS54494RSAT		2 A 4 A							700 kHz				Positive	Step-Down	18 V	85 °C	-40 °C	Adjustable	Buck	0.76 V	Surface Mount	7 V	16-VQFN Exposed Pad	4.5 V	2	16-QFN (4x4)
Texas Instruments TPS54494PWP		2 A 4 A							700 kHz				Positive	Step-Down	18 V	85 °C	-40 °C	Adjustable	Buck	0.76 V	Surface Mount	7 V	16-PowerTSSOP	4.5 V	2	16-HTSSOP	0.173 in 4.4 mm Width
Texas Instruments TPS54494RSAR		2 A 4 A							700 kHz				Positive	Step-Down	18 V	85 °C	-40 °C	Adjustable	Buck	0.76 V	Surface Mount	7 V	16-VQFN Exposed Pad	4.5 V	2	16-QFN (4x4)

Catalog

4A Dual Channel Synchronous Step-Down Switcher with Integrated FET

Key Features

• D-CAP2 Control ModeFast Transient ResponseNo External Parts Required For Loop CompensationCompatible with Ceramic Output CapacitorsWide Input Voltage Range : 4.5 V to 18 VOutput Voltage Range: 0.76V to 7VHighly Efficient Integrated FETs Optimizedfor Low Duty Cycle Applications90 mΩ (High Side) and 60 mΩ(Low Side)High Initial Reference Accuracy4A CH1 / 2A CH2 Continuous Load CurrentLow-Side rDS(on)Loss-LessCurrent SensingFixed Soft Start : 1 msNon-Sinking Pre-Biased Soft StartPowergood700 kHz Switching FrequencyCycle-by-Cycle Over-Current Limit ControlOCL/UVLO/TSD ProtectionsHiccup Timer for Overload ProtectionAdaptive Gate Drivers with IntegratedBoost PMOS SwitchOCP Constant Due To Thermally CompensatedrDS(on)with 4000ppm/°C16-Pin HTSSOP, 16-Pin VQFNAuto-Skip Eco-mode　for High Efficiency at Light LoadD-CAP2 Control ModeFast Transient ResponseNo External Parts Required For Loop CompensationCompatible with Ceramic Output CapacitorsWide Input Voltage Range : 4.5 V to 18 VOutput Voltage Range: 0.76V to 7VHighly Efficient Integrated FETs Optimizedfor Low Duty Cycle Applications90 mΩ (High Side) and 60 mΩ(Low Side)High Initial Reference Accuracy4A CH1 / 2A CH2 Continuous Load CurrentLow-Side rDS(on)Loss-LessCurrent SensingFixed Soft Start : 1 msNon-Sinking Pre-Biased Soft StartPowergood700 kHz Switching FrequencyCycle-by-Cycle Over-Current Limit ControlOCL/UVLO/TSD ProtectionsHiccup Timer for Overload ProtectionAdaptive Gate Drivers with IntegratedBoost PMOS SwitchOCP Constant Due To Thermally CompensatedrDS(on)with 4000ppm/°C16-Pin HTSSOP, 16-Pin VQFNAuto-Skip Eco-mode　for High Efficiency at Light Load

Description

The TPS54494 is a dual, adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54494 enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low component count, and low standby current solution. The main control loops of the TPS54494 use the D-CAP2™ mode control which provides a very 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 TPS54494 to maintain high efficiency during lighter load conditions. The TPS54494 is able to adapt to both low equivalent series resistance (ESR) output capacitors such as POSCAP or SP-CAP, and ultra-low ESR, ceramic capacitors. The device provides convenient and efficient operation with input voltages from 4.5V to 18V. The TPS54494 is available in a 4.4 mm × 5 mm 16-pin TSSOP (PWP) and 4 mm × 4 mm 16-pin VQFN (RSA) package, and is specified for an ambient temperature range from –40°C to 85°C. The TPS54494 is a dual, adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54494 enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low component count, and low standby current solution. The main control loops of the TPS54494 use the D-CAP2™ mode control which provides a very 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 TPS54494 to maintain high efficiency during lighter load conditions. The TPS54494 is able to adapt to both low equivalent series resistance (ESR) output capacitors such as POSCAP or SP-CAP, and ultra-low ESR, ceramic capacitors. The device provides convenient and efficient operation with input voltages from 4.5V to 18V. The TPS54494 is available in a 4.4 mm × 5 mm 16-pin TSSOP (PWP) and 4 mm × 4 mm 16-pin VQFN (RSA) package, and is specified for an ambient temperature range from –40°C to 85°C.