TPS65273 Series

4.5V to 18V Input, 3.5A/3.5A Dual Synchronous Step-down Converter with I2C Controlled VID

Catalog(4 parts)

Part	Output Type	Mounting Type	Frequency - Switching▲▼	Frequency - Switching▲▼	Operating Temperature▲▼	Operating Temperature▲▼	Current - Output▲▼	Voltage - Input (Max)▲▼	Voltage - Output (Min/Fixed)▲▼	Output Configuration	Package / Case	Package / Case▲▼	Supplier Device Package	Voltage - Input (Min)▲▼	Voltage - Output (Max)▲▼	Number of Outputs▲▼	Function	Topology	Voltage - Input▲▼	Voltage - Input▲▼	Supplied Contents	Main Purpose	Utilized IC / Part	Board Type	Frequency - Switching▲▼	Voltage - Output▲▼	Outputs and Type▲▼	Outputs and Type
Texas Instruments TPS65273VDAPR Buck Switching Regulator IC Positive Programmable 0.68V 2 Output 3.5A 32-PowerTSSOP (0.240", 6.10mm Width)	Programmable	Surface Mount	1600000 Hz	200000 Hz	85 °C	-40 °C	3.5 A	18 V	0.6800000071525574 V	Positive	32-PowerTSSOP	0.006095999851822853 m, 0.006099999882280827 m	32-HTSSOP	4.5 V	1.950000047683716 V	2 ul	Step-Down	Buck
Texas Instruments TPS65273VRHHR Buck Switching Regulator IC Positive Programmable 0.68V 2 Output 3.5A 36-VFQFN Exposed Pad	Programmable	Surface Mount	1600000 Hz	200000 Hz	85 °C	-40 °C	3.5 A	18 V	0.6800000071525574 V	Positive	36-VFQFN Exposed Pad		36-VQFN (6x6)	4.5 V	1.950000047683716 V	2 ul	Step-Down	Buck
Texas Instruments TPS65273VRHHT Buck Switching Regulator IC Positive Programmable 0.68V 2 Output 3.5A 36-VFQFN Exposed Pad	Programmable	Surface Mount	1600000 Hz	200000 Hz	85 °C	-40 °C	3.5 A	18 V	0.6800000071525574 V	Positive	36-VFQFN Exposed Pad		36-VQFN (6x6)	4.5 V	1.950000047683716 V	2 ul	Step-Down	Buck
Texas Instruments TPS65273VTEVM TPS65273V - DC/DC, Step Down 2, Non-Isolated Outputs Evaluation Board							3.5 A												18 V	4.5 V	Board(s)	DC/DC, Step Down	TPS65273V	Fully Populated	500000 Hz	1 V, 1.100000023841858 V	2 ul	Non-Isolated

Key Features

• 4.5-V to 18-V Wide Input Voltage RangeI2C Controlled 7-Bits VID ProgrammableOutput Voltage from 0.68 V to 1.95 V with10-mV Steps for Each Buck; Output Voltage CanAlso be Set By Resistor DividerProgrammable Slew Rate Control for Output VoltageTransitionUp to 3.5-A Maximum Continuous Output Current inBuck 1 and Buck 2Buck 1 and Buck 2 can be Paralleled to Deliverup to 7-A CurrentI2C Compatible Interface With StandardMode (100 kHz) and Fast Mode (400 kHz)I2C Read Back Power Good Status and DieTemperature WarningPulse Skipping Mode to Achieve High Efficiencyin Light LoadAdjustable Switching Frequency200 kHz - 1.6 MHz Set by External ResistorDedicated Enable and Soft-Start for Each BuckPeak Current-Mode Control with Simple CompensationCircuitCycle-by-Cycle Over Current Protection180° Out-of-Phase Operation to Reduce InputCapacitance and Power Supply Induced NoiseOver Temperature ProtectionAvailable in 32-Pin Thermally Enhanced HTSSOP (DAP)and 36-Pin QFN 6-mm × 6-mm (RHH) Packages4.5-V to 18-V Wide Input Voltage RangeI2C Controlled 7-Bits VID ProgrammableOutput Voltage from 0.68 V to 1.95 V with10-mV Steps for Each Buck; Output Voltage CanAlso be Set By Resistor DividerProgrammable Slew Rate Control for Output VoltageTransitionUp to 3.5-A Maximum Continuous Output Current inBuck 1 and Buck 2Buck 1 and Buck 2 can be Paralleled to Deliverup to 7-A CurrentI2C Compatible Interface With StandardMode (100 kHz) and Fast Mode (400 kHz)I2C Read Back Power Good Status and DieTemperature WarningPulse Skipping Mode to Achieve High Efficiencyin Light LoadAdjustable Switching Frequency200 kHz - 1.6 MHz Set by External ResistorDedicated Enable and Soft-Start for Each BuckPeak Current-Mode Control with Simple CompensationCircuitCycle-by-Cycle Over Current Protection180° Out-of-Phase Operation to Reduce InputCapacitance and Power Supply Induced NoiseOver Temperature ProtectionAvailable in 32-Pin Thermally Enhanced HTSSOP (DAP)and 36-Pin QFN 6-mm × 6-mm (RHH) Packages

Description

The TPS65273V is a monolithic dual synchronous buck regulator with wide 4.5-V to 18-V operating input voltage that can operate in 5-, 9-, 12- or 15-V bus voltages and battery chemistries. The converters are designed to simplify its application while giving the designer the option to optimize their usage according to the target application. The TPS65273V has external feedback resistors that can be used for setting the initial start up voltage. The feedback voltage reference for this start-up option is 0.6 V. Once the VID DAC is updated via the I2C, the buck converter switches feedback resistors from external to internal. The output voltage in each buck can be programmable from 0.68 V to 1.95 V in 10-mV steps with I2C Controlled 7-Bits VID. TPS65273V can also be I2C controlled for enabling/disabling output voltage, setting the pulse skipping mode and reading the power good status and die temperature warning. The switching frequency of the converters can be set from 200 kHz to 1.6 MHz with an external resistor. Two converters have clock signal with 180° out-of-phase. Two bucks in TPS65273V can be paralleled to deliver up to 10-A load current by floating the MODE pin. Two phase operation in current sharing reduces system filtering capacitance and inductance, alleviates EMI and improves output voltage ripple and noise. TPS65273V features dedicated enable pin when I2C interface is not used. Independent soft-start pin provides flexibility in power up programmability. Constant frequency peak current mode control simplifies the compensation and provides fast transient response. Cycle-by-cycle over current protection and hiccup mode operation limit MOSFET power dissipation in short circuit or over loading fault conditions. Low side reverse over current protection also prevents excessive sinking current from damaging the converter. TPS65273V also features a light load pulse skipping mode (PSM) that can be controlled by I2C or MODE pin configuration. The PSM mode allows a power loss reduction on the input power supplied to the system to achieve high efficiency at light loading. The TPS65273V is available in a 32-pin thermally enhanced HTSSOP (DAP) package and 36-pin QFN 6-mm × 6-mm (RHH) package. The TPS65273V is a monolithic dual synchronous buck regulator with wide 4.5-V to 18-V operating input voltage that can operate in 5-, 9-, 12- or 15-V bus voltages and battery chemistries. The converters are designed to simplify its application while giving the designer the option to optimize their usage according to the target application. The TPS65273V has external feedback resistors that can be used for setting the initial start up voltage. The feedback voltage reference for this start-up option is 0.6 V. Once the VID DAC is updated via the I2C, the buck converter switches feedback resistors from external to internal. The output voltage in each buck can be programmable from 0.68 V to 1.95 V in 10-mV steps with I2C Controlled 7-Bits VID. TPS65273V can also be I2C controlled for enabling/disabling output voltage, setting the pulse skipping mode and reading the power good status and die temperature warning. The switching frequency of the converters can be set from 200 kHz to 1.6 MHz with an external resistor. Two converters have clock signal with 180° out-of-phase. Two bucks in TPS65273V can be paralleled to deliver up to 10-A load current by floating the MODE pin. Two phase operation in current sharing reduces system filtering capacitance and inductance, alleviates EMI and improves output voltage ripple and noise. TPS65273V features dedicated enable pin when I2C interface is not used. Independent soft-start pin provides flexibility in power up programmability. Constant frequency peak current mode control simplifies the compensation and provides fast transient response. Cycle-by-cycle over current protection and hiccup mode operation limit MOSFET power dissipation in short circuit or over loading fault conditions. Low side reverse over current protection also prevents excessive sinking current from damaging the converter. TPS65273V also features a light load pulse skipping mode (PSM) that can be controlled by I2C or MODE pin configuration. The PSM mode allows a power loss reduction on the input power supplied to the system to achieve high efficiency at light loading. The TPS65273V is available in a 32-pin thermally enhanced HTSSOP (DAP) package and 36-pin QFN 6-mm × 6-mm (RHH) package.