TPS65581 Series

4.5V to 20V Input, 3.3V 3A Synchronous Step-Down SWIFT™ Converter w/ Low-Side Gate Driver

Catalog

4.5V to 20V Input, 3.3V 3A Synchronous Step-Down SWIFT™ Converter w/ Low-Side Gate Driver

Part	Voltage - Input (Min) [Min]	Voltage - Input (Max) [Max]	Voltage - Output (Min/Fixed)	Operating Temperature [Max]	Operating Temperature [Min]	Frequency - Switching	Supplier Device Package	Voltage - Output (Max) [Max]	Topology	Current - Output	Mounting Type	Output Configuration	Function	Output Type	Package / Case	Package / Case [custom]	Package / Case	Number of Outputs	Synchronous Rectifier	Main Purpose	Outputs and Type	Outputs and Type	Utilized IC / Part	Regulator Topology	Voltage - Output	Voltage - Input [Max]	Voltage - Input [Min]	Supplied Contents	Board Type
Texas Instruments TPS65581PWPR	4.5 V	18 V	0.764 V	85 °C	-40 °C	700 kHz	20-HTSSOP	7 V	Buck	1.5 A 2.5 A	Surface Mount	Positive	Step-Down	Adjustable	20-PowerTSSOP	4.4 mm	0.173 in	3
Texas Instruments TPS65581EVM-575						700 kHz				1.5 A 2 A										DC/DC Step Down	Non-Isolated	3	TPS65581	Buck	1.2 V 1.5 V 3.3 V	18 V	4.5 V	Board(s)	Fully Populated

Catalog

4.5V to 20V Input, 3.3V 3A Synchronous Step-Down SWIFT™ Converter w/ Low-Side Gate Driver

Key Features

• Advanced D-CAP2 Control ModeFast Transient ResponseNo External Parts RequiredFor Loop CompensationCompatible with Ceramic OutputCapacitorsWide Input Voltage Range :4.5 V to 18 VOutput Voltage Range :0.76 V to 7 VHighly Efficient Integrated FETsOptimized for Low Duty CycleApplications160 mΩ (High Side) and 130 mΩ(Low Side) for 2.5A250mΩ (High Side) and 230mΩ(Low Side) for 1.5AHigh Initial Reference AccuracyLow-Side RDS(on)Loss-LessCurrent SensingFixed 1.2 ms Soft StartNon-Sinking Pre-Biased SoftStart700 kHz Switching FrequencyCycle-by-Cycle Over-CurrentLimiting ControlOCL, OVP, UVP, UVLO, TSDProtectionsHiccup Timer for Over LoadProtectionPowerGoodAdaptive Gate Drivers with IntegratedBoost PMOS SwitchOCP Constant Due To Thermally CompensatedRDS(on)with 4000ppm/℃20-Pin HTSSOPAuto-Skip Eco-mode for High Efficiency atLight LoadAdvanced D-CAP2 Control ModeFast Transient ResponseNo External Parts RequiredFor Loop CompensationCompatible with Ceramic OutputCapacitorsWide Input Voltage Range :4.5 V to 18 VOutput Voltage Range :0.76 V to 7 VHighly Efficient Integrated FETsOptimized for Low Duty CycleApplications160 mΩ (High Side) and 130 mΩ(Low Side) for 2.5A250mΩ (High Side) and 230mΩ(Low Side) for 1.5AHigh Initial Reference AccuracyLow-Side RDS(on)Loss-LessCurrent SensingFixed 1.2 ms Soft StartNon-Sinking Pre-Biased SoftStart700 kHz Switching FrequencyCycle-by-Cycle Over-CurrentLimiting ControlOCL, OVP, UVP, UVLO, TSDProtectionsHiccup Timer for Over LoadProtectionPowerGoodAdaptive Gate Drivers with IntegratedBoost PMOS SwitchOCP Constant Due To Thermally CompensatedRDS(on)with 4000ppm/℃20-Pin HTSSOPAuto-Skip Eco-mode for High Efficiency atLight Load

Description

The TPS65581 is a triple, advanced D-CAP2™ mode synchronous buck converter. The TPS65581 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 TPS65581 uses the advanced D-CAP2™ mode control which provides a fast transient response with no external compensation components. Advanced D-CAP2™ mode control supports seamless transition between PWM mode at higher load conditions and Eco-mode™ allows the TPS65581 to maintain high efficiency during light load conditions. The device 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 TPS65581 is available in 4.4mm × 6.5mm 20 pin TSSOP (PWP) package, and is specified from –40°C to 85°C ambient temperature range. The TPS65581 is a triple, advanced D-CAP2™ mode synchronous buck converter. The TPS65581 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 TPS65581 uses the advanced D-CAP2™ mode control which provides a fast transient response with no external compensation components. Advanced D-CAP2™ mode control supports seamless transition between PWM mode at higher load conditions and Eco-mode™ allows the TPS65581 to maintain high efficiency during light load conditions. The device 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 TPS65581 is available in 4.4mm × 6.5mm 20 pin TSSOP (PWP) package, and is specified from –40°C to 85°C ambient temperature range.