SC173MLTRT Integrated Circuits (ICs)

Voltage - Input (Max):	5.5V
Supplier Device Package:	10-MLPD (3x3)
Package / Case:	10-VFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	200kHz ~ 1MHz
Current - Output:	3A
Voltage - Output (Max):	5.23V
Voltage - Output (Min/Fixed):	0.75V
Series:	EcoSpeed®
Voltage - Input (Min):	3V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Cut Tape (CT)

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SC173MLTRT Application Field and Working Principle

SC173MLTRT is a DC-DC switching regulator integrated circuit manufactured by Texas Instruments. This regulator is designed to step down/Convert voltage from one voltage level to another. It has on-board error amplifier, voltage reference, high side driver, and an internal synchronous MOSFET switch making it suitable solution for low ripple, low noise and versatility.

1 Application Field of SC173MLTRT

SC173MLTRT is a monolithic switch mode step-down voltage regulator that has low noise and high efficiency. It has maximum DC input of 40V and minimum DC output of 4V. It is suitable for applications like motor driver, telecom/datacenter, server and storage, and utility metering. In Datacenter applications, it used in supplying power for the server, storage and transceivers used in high-density datacenter and high power applications. In motor driver application, SC173MLTRT is used for motor control in a robotic application to convert a higher voltage from a power supply to a lower one. In Utility metering applications, it is used to deliver regulation and transient load handling for meters and transducers.

2 Working Principle of SC173MLTRT

SC173MLTRT uses switching regulation to convert a DC input voltage to a lower DC output voltage. It has an on-board error amplifier, a voltage reference, a high side driver, and an internal synchronous MOSFET switch. In switching mode operation, the SC173MLTRT quickly switches a MOSFETs between On and Off state. When the MOSFET is ON, energy is stored in inductor, which is connected between VOUT, and ground. This stored energy will be stored in the output capacitor when the MOSFET switches to OFF state. The error amplifier measures the output voltage relative to the reference voltage and adjusts the feedback loop, and MOSFET switch between ON and OFF to maintain the desired output voltage. The SC173MLTRT provides protection features like over voltage protection, thermal shutdown and over current protection that protect the system from overloading and damaging.

3 Advantages of SC173MLTRT

The main advantage of SC173MLTRT is that it is a very efficient regulator, with a typical high efficiency of over 90%. With its integrated high side switch and low ripple and low noise, it is suitable for high load applications. With its wide input voltage range, SC173MLTRT can be used in a variety of applications. It also offers protection features, like over voltage, over current and thermal shutdown protection, which can help to protect the system from overload and damage.

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