TPS65261 Series

4.5V to 18V Input Voltage, 3A/2A/2A Output Current Triple Synchronous

Catalog(5 parts)

Part	Output Configuration	Voltage - Input (Max)▲▼	Current - Output▲▼	Operating Temperature▲▼	Operating Temperature▲▼	Function	Voltage - Input (Min)▲▼	Voltage - Output (Min/Fixed)▲▼	Mounting Type	Number of Outputs▲▼	Output Type	Frequency - Switching▲▼	Frequency - Switching▲▼	Voltage - Output (Max)▲▼	Supplier Device Package	Topology	Package / Case	Board Type	Supplied Contents	Outputs and Type	Outputs and Type▲▼	Utilized IC / Part	Contents	Main Purpose	Frequency - Switching▲▼	Voltage - Input▲▼	Voltage - Input▲▼	Voltage - Output▲▼
Texas Instruments TPS65261-1RHBT Buck Switching Regulator IC Positive Adjustable 0.6V 3 Output 3A, 2A 32-VFQFN Exposed Pad	Positive	18 V	2 A, 3 A	85 °C	-40 °C	Step-Down	4.5 V	0.6000000238418579 V	Surface Mount	3 ul	Adjustable	250000 Hz	2000000 Hz	18 V	32-VQFN (5x5)	Buck	32-VFQFN Exposed Pad
Texas Instruments TPS65261RHBT Buck Switching Regulator IC Positive Adjustable 0.6V 3 Output 3A, 2A 32-VFQFN Exposed Pad	Positive	18 V	2 A, 3 A	85 °C	-40 °C	Step-Down	4.5 V	0.6000000238418579 V	Surface Mount	3 ul	Adjustable	250000 Hz	2000000 Hz	18 V	32-VQFN (5x5)	Buck	32-VFQFN Exposed Pad
Texas Instruments TPS65261-1EVM TPS65261-1 - DC/DC, Step Down 3, Non-Isolated Outputs Evaluation Board			2 A, 3 A															Fully Populated	Board(s)	Non-Isolated	3 ul, 3 ul	TPS65261-1	Board(s)	DC/DC, Step Down	600000 Hz	18 V	4.5 V	1.2000000476837158 V, 1.7999999523162842 V, 3.299999952316284 V
Texas Instruments TPS65261-1RHBR Buck Switching Regulator IC Positive Adjustable 0.6V 3 Output 3A, 2A 32-VFQFN Exposed Pad	Positive	18 V	2 A, 3 A	85 °C	-40 °C	Step-Down	4.5 V	0.6000000238418579 V	Surface Mount	3 ul	Adjustable	250000 Hz	2000000 Hz	18 V	32-VQFN (5x5)	Buck	32-VFQFN Exposed Pad
Texas Instruments TPS65261EVM-650 TPS65261 - DC/DC, Step Down 3, Non-Isolated Outputs Evaluation Board			2 A, 3 A															Fully Populated	Board(s)	Non-Isolated	3 ul	TPS65261		DC/DC, Step Down	600000 Hz	18 V	4.5 V	1.2000000476837158 V, 1.7999999523162842 V, 3.299999952316284 V

Key Features

• Operating input supply voltage range (4.5 V to 18 V)Feedback reference voltage 0.6 V±1%Maximum continuous output current 3 A/2 A/2 AAdjustable clock frequency from 250 kHz to 2 MHzdedicated enable and soft start pins for each buckAutomatic power-up, power-down sequencePulse Skipping Mode (PSM) at Light Load (TPS65261 only)Output voltage power-good indicatorInput voltage power failure indicatorThermal overloading protectionOperating input supply voltage range (4.5 V to 18 V)Feedback reference voltage 0.6 V±1%Maximum continuous output current 3 A/2 A/2 AAdjustable clock frequency from 250 kHz to 2 MHzdedicated enable and soft start pins for each buckAutomatic power-up, power-down sequencePulse Skipping Mode (PSM) at Light Load (TPS65261 only)Output voltage power-good indicatorInput voltage power failure indicatorThermal overloading protection

Description

The TPS65261, TPS65261-1 is a monolithic triple synchronous step-down (buck) converter with 3-A/2-A/2-A output currents. A wide 4.5-V to 18-V input supply voltage range encompasses the most intermediate bus voltages operating off 5-V, 9-V, 12-V or 15-V power bus. The converter, with constant frequency peak current mode, is designed to simplify its application while giving designers options to optimize the system according to targeted applications. The switching frequency of the converters can be adjusted from 250 kHz to 2 MHz with an external resistor. The 180° out-of-phase operation between Buck1 and Buck2, 3 (Buck2 and 3 run in phase) minimizes the input filter requirements. The TPS65261, TPS65261-1 features an automatic power sequence with connecting MODE pin to V7V and configuring EN1/2/3 pins. The device also features an open drain RESET signal to monitor power down. At light load, the TPS65261 automatically operates in pulse skipping mode (PSM) and the TPS65261-1 operates in force continuous current mode (FCC). PSM mode provides high efficiency by reducing switching losses at light loads and FCC mode reduces noise susceptibility and RF interference. The device features overvoltage protection, overcurrent and short-circuit protection and over-temperature protection. A power-good pin asserts when any output voltages are out of regulation. The TPS65261, TPS65261-1 is a monolithic triple synchronous step-down (buck) converter with 3-A/2-A/2-A output currents. A wide 4.5-V to 18-V input supply voltage range encompasses the most intermediate bus voltages operating off 5-V, 9-V, 12-V or 15-V power bus. The converter, with constant frequency peak current mode, is designed to simplify its application while giving designers options to optimize the system according to targeted applications. The switching frequency of the converters can be adjusted from 250 kHz to 2 MHz with an external resistor. The 180° out-of-phase operation between Buck1 and Buck2, 3 (Buck2 and 3 run in phase) minimizes the input filter requirements. The TPS65261, TPS65261-1 features an automatic power sequence with connecting MODE pin to V7V and configuring EN1/2/3 pins. The device also features an open drain RESET signal to monitor power down. At light load, the TPS65261 automatically operates in pulse skipping mode (PSM) and the TPS65261-1 operates in force continuous current mode (FCC). PSM mode provides high efficiency by reducing switching losses at light loads and FCC mode reduces noise susceptibility and RF interference. The device features overvoltage protection, overcurrent and short-circuit protection and over-temperature protection. A power-good pin asserts when any output voltages are out of regulation.