LT1172CSW#PBF

Voltage - Output (Min/Fixed):	1.244V
Base Part Number:	LT1172
Supplier Device Package:	16-SOIC
Package / Case:	16-SOIC (0.295", 7.50mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 100°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	100kHz
Current - Output:	1.25A (Switch)
Voltage - Output (Max):	65V (Switch)
Series:	--
Voltage - Input (Max):	40V
Voltage - Input (Min):	3V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck, Boost, Cuk, Flyback, Forward Converter
Output Configuration:	Positive or Negative
Function:	Step-Up, Step-Down, Step-Up/Step-Down
Part Status:	Active
Packaging:	Tube

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LT1172CSW#PBF Application Field and Working Principle

The LT1172CSW#PBF is a power switching regulator specifically designed for use in a variety of DC-DC applications. It is a type of voltage regulator device which is used to regulate the voltage levels required by various electrical and electronic circuits. As such, the LT1172CSW#PBF is typically included in the Power Management Integrated Circuit (PMIC) category of Voltage Regulators, more specifically under the DC DC Switching Regulators subclass. This article focuses on examining its application fields, as well as its working principle.

Application Fields

The LT1172CSW#PBF regulator is mainly suitable for step-down voltage regulation, which is a process of reducing an input voltage to a specified lower output voltage. It can be used to reliably and efficiently power a variety of loads that require a DC source to operate. This device offers current limiting and short-circuit protection while still providing a high level of efficiency.One of the main applications of this device is in automotive systems, particularly in automotive radios and radios used in navigation systems. It is especially useful when powered by the common 12V DC wall plugs, as the regulator can be used to step-down the voltage to provide the necessary currents for powering the radio or navigation system. It is also commonly found in cordless telephones and other remote applications, as well as in other smaller electronic devices that are powered by battery or power sources.

Working Principle

The LT1172CSW#PBF switching regulator operates through a Control Circuit, which converts the input voltage from an AC or DC source, into a switched voltage. The regulator further processes the switched voltage through an Energy Transfer Network (ETN), which ensures the stability and accuracy of the output voltage. As the voltage passes through the ETN, it is amplified and rectified, while the capacitors and inductors of the ETN act as a smoothing filter to smoothen the waves of the output voltage as it passes through.The voltage regulating action of the LT1172CSW#PBF regulator is achieved by the voltage reference device, which is a component connected to the Control Circuit of the regulator. The reference device senses the output voltage, and generates a signal to the control circuit which determines the limit at which the output voltage should be regulated. If the voltage begins to rise above the reference voltage, the regulator will reduce the current passing through the output, thus reducing the output voltage, and maintaining the regulated voltage level in the circuit.In addition to regulating the voltage, the LT1172CSW#PBF regulator also provides a variety of protection features such as current-limiting and thermal-protection. The device also offers helpful features such as low current quiescent current, good ripple rejection, and fast switching times.

Conclusion

The LT1172CSW#PBF regulator is a type of power switching regulator designed for step-down applications. It is typically used in automotive systems, cordless telephones, and a variety of other small electronic devices, in order to provide regulated DC power sources. The device operates by converting the input voltage into a switched voltage, and further processes it through an ETN which acts as a smoothing filter. The voltage regulating action is provided by the voltage reference device which senses the output voltage, and sends a signal to the control circuit to regulate the output voltage. The device also offers current limiting, short-circuit protection, and various other implementations such as low current quiescent current, good ripple rejection, and fast switching times.

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