TPS61097-33DBVT

Voltage - Output (Min/Fixed):	3.3V
Base Part Number:	TPS61097
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	--
Current - Output:	200mA (Switch)
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	0.9V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Boost
Output Configuration:	Positive
Function:	Step-Up
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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TPS61097-33DBVT Application Field and Working Principle

The TPS61097-33DBVT is a high-efficiency, synchronous, step-down regulator with a wide range of applications. It is part of Texas Instruments\' Power Management Integrated Circuit (PMIC) family of voltage regulators and switching regulators, particularly those within the DC-DC switching regulator area. The TPS61097-33DBVT is designed for buck-mode applications with an input voltage range of 3.3V to 56V with output voltages from 0.9V to 0.6V that can be adjusted in 25mV steps. The TPS61097-33DBVT is rated for an output current of up to 2A with a low typical thermal resistance of 4.4 K/W.

Features of TPS61097-33DBVT

The TPS61097-33DBVT is a highly-integrated device that is small in size and delivers outstanding efficiency and high power density. This device, rated at 2A, delivers higher this current than typical 1A switching regulators. The power saving benefits are further enhanced by its quiescent current of 70uA maximum and high efficiency at load currents greater than 50mA. It supports synchronous operation, enabling the regulator to turn on quickly at normal and light load conditions. The system also ensures a low-ripple and noise free output at all load conditions, enabling a low-noise, high-efficiency system. In addition, it has over-temperature and over-current protection features, allowing for a reliable and safe operation if an over-load or an over temperature condition occurs.

Working principle of TPS61097-33DBVT

The TPS61097-33DBVT operates by using pulse width modulation (PWM) control in conjunction with mode control circuitry. The minimum duty cycle for the TPS61097-33DBVT is 10%. Mode controllers maintain a fixed frequency within a certain range during startup, light load, and full load operations. In addition, a pulse-by-pulse current limit allows an increase of the duty cycle in response to load fluctuations. In this way, it ensures a reliable operation at all load conditions.The switching frequency is set by an internal frequency synchronization notch, which makes the switching frequency exempt from the input voltage deviation over a certain range. This rhythm produces a low electromagnetic interference (EMI), ensuring an inherently clean signal both at the output and input of the regulator. In addition, the output signal is heavily filtered to reduce noise and ripple to its minimum.

Conclusion

In conclusion, the TPS61097-33DBVT is an advanced step-down synchronous voltage regulator from Texas Instruments’ PMIC family of voltage regulators. This device is designed for high current buck-mode applications with an exceptionally low quiescent current of 70uA, robust over-temperature and over-load protection, and high efficiency in operation over a wide range of load and temperature conditions. This highly integrated device ensures low-noise, low-ripple, and high-performance power conversion.

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