TPS65253 Series

4.5V to 16V input, 2.5A/3.5A output Dual Buck Converter

Catalog

4.5V to 16V input, 2.5A/3.5A output Dual Buck Converter

Part	Output Type	Output Configuration	Voltage - Input (Min) [Min]	Voltage - Input (Max) [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Output (Min/Fixed)	Current - Output	Topology	Frequency - Switching [Min]	Frequency - Switching [Max]	Supplier Device Package	Number of Outputs	Function	Mounting Type	Package / Case	Regulator Topology	Supplied Contents	Outputs and Type	Outputs and Type	Voltage - Output [Min]	Voltage - Output [Max]	Utilized IC / Part	Board Type	Main Purpose	Voltage - Input [Max]	Voltage - Input [Min]
Texas Instruments TPS65253RHDT	Adjustable	Positive	4.5 V	16 V	85 °C	-40 °C	0.8 V	2.5 A 3.5 A	Buck	300 kHz	1.2 MHz	28-VQFN (5x5)	2	Step-Down	Surface Mount	28-VFQFN Exposed Pad
Texas Instruments TPS65253RHDR	Adjustable	Positive	4.5 V	16 V	85 °C	-40 °C	0.8 V	2.5 A 3.5 A	Buck	300 kHz	1.2 MHz	28-VQFN (5x5)	2	Step-Down	Surface Mount	28-VFQFN Exposed Pad
Texas Instruments TPS65253EVM								3 A 4 A		300 kHz	1.2 MHz						Buck	Board(s)	2	Non-Isolated	0.8 V	15 V	TPS65253	Fully Populated	DC/DC Step Up	16 V	4.5 V

Catalog

4.5V to 16V input, 2.5A/3.5A output Dual Buck Converter

Key Features

• Wide Input Supply Voltage Range:4.5 V – 16 VOutput Range: 0.8 V to ~VIN–1 VFully Integrated Dual Buck, 3.5-A/2.5-A Continuous Current(4-A/3-A Maximum Current)High Efficiency300-kHz – 1.2-MHz Switching Frequency Set by External ResistorExternal Eenable/Sequencing PinsAdjustable Cycle-by-Cycle Current Limit Set by External ResistorSoft-Start PinsCurrent-Mode Control With Simple Compensation CircuitPower Good and Reset GeneratorLow Power Mode Set By External SignalSupervisory CircuitQFN Package, 28-Pin 5 mm × 5 mm RHDAPPLICATIONSDTVDSL ModemsCable ModemsSet Top BoxesCar DVD PlayersHome Gateway and Access Point NetworksWireless RoutersWide Input Supply Voltage Range:4.5 V – 16 VOutput Range: 0.8 V to ~VIN–1 VFully Integrated Dual Buck, 3.5-A/2.5-A Continuous Current(4-A/3-A Maximum Current)High Efficiency300-kHz – 1.2-MHz Switching Frequency Set by External ResistorExternal Eenable/Sequencing PinsAdjustable Cycle-by-Cycle Current Limit Set by External ResistorSoft-Start PinsCurrent-Mode Control With Simple Compensation CircuitPower Good and Reset GeneratorLow Power Mode Set By External SignalSupervisory CircuitQFN Package, 28-Pin 5 mm × 5 mm RHDAPPLICATIONSDTVDSL ModemsCable ModemsSet Top BoxesCar DVD PlayersHome Gateway and Access Point NetworksWireless Routers

Description

The TPS65253 features two synchronous wide input range high efficiency buck converters. The converters are designed to simplify product application while giving designers the options to optimize their usage according to the target application. The converters can operate in 5-, 9- and 12-V systems and have integrated power transistors. The output voltage can be set externally using a resistor divider to any value between 0.8 V and the input supply minus 1 V. Each converter features an enable pin that allows a delayed start-up for sequencing purposes, soft-start pin that allows adjustable soft-start time by choosing the soft-start capacitor, and a current limit (RLIMx) pin that enables designer to adjust current limit by selecting an external resistor and optimize the choice of inductor. The CMP pin allows optimizing transient versus dc accuracy response with a simple RC compensation. The switching frequency of the converters is set by an external resistor connected to ROSCpin. The switching regulators are designed to operate from 300 kHz to 1.2 MHz. The converters operate with 180° phase between then to minimize the input filter requirements. TPS65253 also features a low power mode enabled by an external signal, which allows for a reduction on the input power supplied to the system when the host processor is in stand-by (low activity) mode. TPS65253 features a supervisor circuit that monitors both converters and provides a PGOOD signal (End of Reset) with a 32-ms timer. TPS65253 is packaged in a small, thermally efficient 28-pin QFN package. The TPS65253 features two synchronous wide input range high efficiency buck converters. The converters are designed to simplify product application while giving designers the options to optimize their usage according to the target application. The converters can operate in 5-, 9- and 12-V systems and have integrated power transistors. The output voltage can be set externally using a resistor divider to any value between 0.8 V and the input supply minus 1 V. Each converter features an enable pin that allows a delayed start-up for sequencing purposes, soft-start pin that allows adjustable soft-start time by choosing the soft-start capacitor, and a current limit (RLIMx) pin that enables designer to adjust current limit by selecting an external resistor and optimize the choice of inductor. The CMP pin allows optimizing transient versus dc accuracy response with a simple RC compensation. The switching frequency of the converters is set by an external resistor connected to ROSCpin. The switching regulators are designed to operate from 300 kHz to 1.2 MHz. The converters operate with 180° phase between then to minimize the input filter requirements. TPS65253 also features a low power mode enabled by an external signal, which allows for a reduction on the input power supplied to the system when the host processor is in stand-by (low activity) mode. TPS65253 features a supervisor circuit that monitors both converters and provides a PGOOD signal (End of Reset) with a 32-ms timer. TPS65253 is packaged in a small, thermally efficient 28-pin QFN package.