TPS61175PWP

Voltage - Output (Min/Fixed):	2.9V
Base Part Number:	TPS61175
Supplier Device Package:	14-HTSSOP
Package / Case:	14-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	200kHz ~ 2.2MHz
Current - Output:	3A (Switch)
Voltage - Output (Max):	38V
Series:	--
Voltage - Input (Max):	18V
Voltage - Input (Min):	2.9V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Boost, Flyback, SEPIC
Output Configuration:	Positive
Function:	Step-Up, Step-Up/Step-Down
Part Status:	Active
Packaging:	Tube

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TPS61175PWP Application Field and Working Principle

Introduction to PMIC - Voltage Regulators - DC DC Switching Regulators

PMIC, or Power Management ICs, are integrated circuits designed to regulate, monitor, and limit the power usage of a system. Voltage regulators are one of these chips, and serve as essential components in an electronic device, providing a consistent output voltage in the face of changes or irregularities in its power supply. DC DC Switching Regulators are one common type of voltage regulator, specifically used to provide an output voltage with greater efficiency and lower power losses than other solutions.

The TPS61175PWP DC DC Switching Regulator

The TPS61175PWP is a DC DC switching regulator from Texas Instruments that offers low power losses, good efficiency, and a wide input voltage range of 4.5V-18V. It is an integrated, fixed frequency buck regulator, allowing high-efficiency DC-DC conversion with preset operating frequency of 1.2MHz. This device is designed for space-limited applications, as it comes in a 5-lead SC-70 package, with a low profile of just 1mm and a footprint of 1.6mm x 1.8mm. To ensure a clean and smooth output, this regulator utilizes synchronous rectification and cycle-by-cycle current limiting.

Application Field

The TPS61175PWP is suitable for a wide range of applications, most commonly used in small, portable, and battery-powered devices. These may include smartphones, cameras, medical devices, IoT devices, and more. Additionally, this device is often used as a post-regulation in PoE applications, providing a reliable and efficient conversion of power to USB interface. It has also been employed in automotive applications due to its low profile, good thermal performance, and wide input voltage range.

Working Principle

The TPS61175PWP offers a fully integrated working solution, with an integrated high side and low side power MOSFET for efficient DC/DC conversion. It operates with a buck topology, where the output voltage is lower than the input voltage. It starts by turning on the power MOSFET, allowing current to flow from the inductor to the output capacitor. This results in a charging of the output capacitor, storing energy and providing a regulated DC voltage. The regulator then turns off the switches, allowing current to flow back through the inductor to the input capacitor, and storing energy for the next cycle. During this period, the energy stored in the output capacitor slowly discharges, and the voltage at the output capacitor reaches its lowest point. Once this point is reached, the cycle starts over again, by turning on the switches and repeating the earlier steps.

Conclusion

The TPS61175PWP DC DC switching regulator is a reliable, integrated solution for portable devices, PoE applications, and automotive applications. Its low power losses, high efficiency, and wide input voltage range make it an ideal choice for a variety of applications. Additionally, its small size and low profile make it ideal for space-limited applications. By incorporating a buck topology and utilizing synchronous rectification, it is capable of providing a clean and smooth output with high efficiency and low losses.

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