TPS65253RHDT

Voltage - Output (Min/Fixed):	0.8V
Base Part Number:	TPS65253
Supplier Device Package:	28-VQFN-EP (5x5)
Package / Case:	28-VFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	300kHz ~ 1.2MHz
Current - Output:	3.5A, 2.5A
Voltage - Output (Max):	15V
Series:	--
Voltage - Input (Max):	16V
Voltage - Input (Min):	4.5V
Number of Outputs:	2
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction of TPS65253RHDT TPS65253RHDT is a synchronous DC/DC buck regulator by Texas Instruments. It is a family of low power, high efficiency, wide input voltage range and low noise voltage regulators. It is designed to operate at high switching frequency of 1.2MHz and is optimized to deliver high ripple rejection, low noise and low output voltage accuracy. It provides up to 30W of reliable power supply design with tight load regulation and fast transient response.The TPS65253RHDT is a extended temperature, which is designed to operate at up to 150°C junction temperature in applications requiring low voltage, high current output in the range of −6.0V to 3.2V. It supports both preset and programmable output s. electrical characteristics include dropout voltage, input current at dropout, output voltage accuracy and transient response. Features of TPS65253RHDT 1. Wide Input Voltage Range: The TPS65253RHDT can operate from an input voltage range of 4.5V to 17V. 2. High Efficiency: The device is designed for high efficiency which enables regulators for good design and low external component count. 3. High Ripple Rejection: The TPS65253RHDT provides high-ripple rejection which helps in better regulation of the output voltage. 4. Low Output Voltage Accuracy: With the output voltage accuracy of ±1%, the TPS65253RHDT allows for desiring output voltage. 5. Low Noise: With the output voltage accuracy of ±1%, the TPS65253RHDT allows for desiring maximum noise at the output. 6. Developed for High Temperature Applications: The TPS65253RHDT combines extended temperature support with an improved die-to-lead time to provide an extended temperature operating range. 7. Low Quiescent Current: With a low quiescent current of 13mA at full load, the TPS65253RHDT enables more efficient operation. 8. Single Synchronous Buck Regulator: The TPS65253RHDT provides a single synchronous buck regulator to offer power solutions requiring low output voltage and high current in a single inductor. 9. Programmable Frequency: The TPS65253RHDT allows for configuring the switching frequency with a programmable clock pre-set to a minimum of 300kHz. Applications of TPS65253RHDTThe TPS65253RHDT is suitable for applications requiring low output voltages, high currents, wide input voltage range and high efficiency. Some of these applications include: 1. Automotive Applications: Automotive applications such as vehicle electronics, BCM power controllers and automotive powertrain systems. 2. Industrial Applications: Industrial applications such as industrial motor controllers, embedded systems, and factory automation. 3. Data Center Applications: Data center applications such as high-performance processor input/output. 4. Portable Equipment: Portable equipment such as portable medical instruments and multi-function printers. 5. IoT Applications: IoT applications such as wearable healthcare, smart home, and industrial automation. Working Principles of TPS65253RHDTThe TPS65253RHDT utilizes an optimized boost post regulator topology with synchronous buck architecture to convert a wide input voltage range of 4.5V to 17V down to preset or programmable output voltage with output voltage accuracy of ±1%. It delivers a high efficiency and fast transient response with the full load currents up to 1.1A. The operation of TPS65253RHDT starts with the input voltage being applied to the input pins. Now the Enable pin monitors the voltage on its control pins and switches the power stage to either on or off mode. If EN pin is left open, the regulator is always on and provides a regulated output voltage. If EN is driven low, then the regulator is switched off and the output is connected to ground through an internal switch. The output voltage is preset using resistors in the solution or it can be programmed using the I2C interface that directly writes the output voltage to the EEPROM on board. The input voltage is connected to the switching MOSFET and a flyback regulator based PWM controller generates the pulse width modulated signal on its output. This PWM signal is fed to the switching MOSFET, which in turn generates oscillations in the output inductor. The output voltage is sensed by the feedback pin and compared with the reference to maintain the output voltage accuracy. The TPS65253RHDT has outperform several other ICs and has proven to be a power system design enabler, due to its flexibility, high load current capability and wide input voltage range. It has become the choice of designers when it comes to standard and innovative power systems. ConclusionTo sum up, TPS65253RHDT is a single synchronous buck regulator for low output voltage and high current applications. It supports both preset and programmable output settings from its wide input voltage range of 4.5V to 17V. It provides high efficiency, fast transient response and tight output voltage accuracy. Its low quiescent current and extended temperature range are of great help for industrial and portable applications. Thus, this device is a great solution for applications requiring a robust and versatile power solution.

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