UCD74106RGMT Integrated Circuits (ICs)

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Function:	Step-Down
Output Configuration:	Positive
Topology:	Buck
Output Type:	--
Number of Outputs:	1
Voltage - Input (Min):	4.5V
Voltage - Input (Max):	18V
Voltage - Output (Min/Fixed):	--
Voltage - Output (Max):	--
Current - Output:	6A
Frequency - Switching:	Up to 2MHz
Synchronous Rectifier:	Yes
Operating Temperature:	-40°C ~ 125°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	13-VFQFN Exposed Pad
Supplier Device Package:	13-VQFN (3x3)
Base Part Number:	UCD74106

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Introduction

UCD74106RGMT (UCD74) is a DC-DC switching regulator by Texas Instruments. It is a monolithic PWM controller with two regulated outputs, one of which is adjustable over a wide range and supplies power up to 20 Watts after a light load and up to 10 Watts in continuous operations. It is suitable for use in portable applications such as notebook and laptop computers. The UCD74 has several features, such as Over Current Protection (OCP), Over Voltage Protection (OVP), and Soft Start, which enable a high performance power supply design. In addition, it is also designed to offer low EMI for better RF isolation, and rapid output voltage settling.

Application Field

The UCD74 is well suited for a variety of DC-DC applications in the computer, consumer, automotive, industrial and telecom industries. It is designed for notebook computers, set-top boxes, network servers, servers, to display screens and other applications where power is needed at multiple sources.In notebook computers and set-top boxes, it can be used as a multiple power supply source. For example, it can provide one regulated output to a processor, another supply to a memory, and another supply to a display. Additionally, the well-defined voltage-drop characteristics and relatively low efficiency of the UCD74 at light load make it an excellent choice in computer monitors, especially LCDs and projectors, requiring ultra-low power when in standby modes.In the telecom industry, the UCD74\'s high power density, low EMI and reliable operation make it an excellent choice for network routers, switches and other applications.In the industrial and automotive industries, the UCD74 can be used to provide power for imaging systems, monitoring equipment and other mobile applications. As it has a wide range of adjustable output voltage, it can also be used to power different types of motors, sensors, communication components and audio amplifiers.

Working Principle

The UCD74 is a monolithic switching regulator that uses current mode control with pulse width modulation (PWM) to regulate its two outputs. It uses an internal clock and comparator to create a stable, accurate PWM signal. The internal voltage reference of the UCD74 is factory set and does not require external compensation.The UCD74 uses external P-channel and N-channel MOSFETs to switch the power supply at a frequency of either 125 kHz, 250 kHz or 500 kHz depending on the load. As the load increases, the frequency decreases, thus increasing the efficiency of the device. The UCD74 has multiple protection mechanisms to ensure reliable operation in the presence of line transients, overcurrents and overvoltages.

Conclusion

The UCD74 is a well-designed, flexible, and highly efficient DC-DC switching regulator by Texas Instruments. It can be used in a variety of applications in the computer, consumer, automotive, industrial and telecom industries. Its features such as Over Current Protection (OCP), Over Voltage Protection (OVP), and Soft Start make it an excellent choice for notebook computer and other applications requiring ultra-low power at light load. It is also designed to offer low EMI for better RF isolation, and rapid output voltage settling. Its internally set reference voltage also ensures stable performance over long operation periods.

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