TPS79928DDCT

Current - Output:	200mA
Base Part Number:	TPS79928
Supplier Device Package:	SOT-23-5
Package / Case:	SOT-23-5 Thin, TSOT-23-5
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
Control Features:	Enable
PSRR:	70dB ~ 38dB (100Hz ~ 100kHz)
Current - Quiescent (Iq):	60µA
Series:	--
Voltage Dropout (Max):	0.18V @ 200mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.8V
Voltage - Input (Max):	6.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The TPS79928DDCT is a very powerful and versatile integrated circuit (IC) from Texas Instruments, Inc. It is a fully-integrated, step-down DC/DC converter with advanced features and a high efficiency power path design. It is ideal for applications including USB-C power delivery, high-capacity batteries, and embedded systems. This device has built-in protection features, such as overcurrent protection and soft-start, and offers a wide input and output voltage range.

Application Field

The TPS79928DDCT DC/DC converter is designed to provide a stable and reliable power source to handheld battery-powered consumer electronics and consumer gadgets. It can be used in mobile and portable consumer devices such as smartphones, tablets, and mobile hotspots, or embedded systems such as industrial, automotive, and medical devices.Other applications include IoT devices, wearable electronics, and Bluetooth headsets. This device is also suitable for Li-ion battery charging. It offers a wide operating temperature range covering commercial (0°C to +70°C) and industrial (-20°C to +85°C) applications.This device also features an advanced power path design that eliminates the need for a battery switch in many portable applications. This eliminates the need for a physical switch to control the power path. Instead, the power path can be selected based on the battery type, charger type, and system requirements.

Working Principle

The TPS79928DDCT DC/DC converter is essentially a buck switching regulator. This type of regulator works by transforming a constant input voltage into a pulsing output voltage, which is then filtered and regulated, providing a stable and efficient output.The TPS79928DDCT converter employs a high efficiency power path design that reduces the amount of power wasted during switching. The buck converter steps down the input voltage using two switching MOSFETs. These MOSFETs are driven by internal circuitry that generates a triangular waveform, modulated to give an approximate linear voltage/frequency relationship. The output voltage is then regulated using internal feedback circuitry.The TPS79928DDCT also features overcurrent protection and integrated soft-start, which prevents high inrush current during start-up. This ensures that the converter is not damaged by excessive current.

Conclusion

The TPS79928DDCT DC/DC converter is a powerful and versatile integrated circuit that can be used in a variety of applications. It is designed to provide a stable and reliable power source to handheld battery-powered consumer electronics and embedded systems. The device\'s advanced power path design eliminates the need for a physical battery switch, offering an efficient and cost-effective solution. It also features overcurrent protection and soft-start, providing enhanced protection against damage.

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