LTM4628IY

Voltage - Output 3:	--
Base Part Number:	LTM4628
Supplier Device Package:	144-BGA (15x15)
Size / Dimension:	0.59" L x 0.59" W x 0.19" H (15.0mm x 15.0mm x 4.9mm)
Package / Case:	144-BBGA Module
Mounting Type:	Surface Mount
Efficiency:	--
Operating Temperature:	-40°C ~ 125°C
Features:	OCP, OVP, UVLO
Applications:	ITE (Commercial)
Current - Output (Max):	8A, 8A
Series:	µModule®
Voltage - Output 2:	0.6 ~ 5.5 V
Voltage - Output 1:	0.6 ~ 5.5 V
Voltage - Input (Max):	26.5V
Voltage - Input (Min):	4.5V
Number of Outputs:	2
Type:	Non-Isolated PoL Module
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tray

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DC DC Converters: LTM4628IY application field and working principle

DC DC converters, also known as DC-DC converters, are electrical circuits that convert a DC current from one power supply to another. The LTM4628IY is a low cost, high efficiency step-down switching regulator module from the Linear Technology Corporation. It is designed to convert an input voltage from 2.7V to 28V to a regulated output voltage of 3.3V. It is also available in several output voltage versions including 5V, 12V and 15V. This module is ideal for powering digital systems such as microcontrollers, FPGAs, and ASICs as it is energy efficient, and offers high speed transient response. The LTM4628IY can be used in a variety of applications such as digital power supply systems, motor controllers, medical equipment, communications systems, automotive voltage regulation, computer workstations, and industrial equipment. The module is ideal for cost sensitive applications as it uses fewer external components than a standard linear regulator, and thus lowering the overall bill of materials (BOM). It is also ideal for applications where space is a consideration, as the module has an ultra-small footprint.

Working Principle

The LTM4628IY works by rectifying and regulating the DC input voltage to a constant output voltage. It consists of an inductor, a diode, an integrated switching circuit, and other components. First, when the input voltage is greater than the output voltage, the power switch closes the switching circuit and allows current to flow through the inductor. As the current flows through the inductor, a magnetic field is created. When the power switch opens, the current is cut off and this creates a magnetic field that collapses, causing the voltage to build up on the inductor until it reaches the output voltage level. Then the diode conducts, allowing a current loop to complete the cycle.The switching regulator module also features an integrated current limit circuit that prevents it from overloading, an over-temperature protection circuit for safe operation, and an adjustable soft-start circuit that prevents inrush current when the module is first powered up. The module also features a low quiescent current, making it suitable for applications that require battery operation.

Conclusion

The LTM4628IY DC-DC converter is a cost effective solution for applications such as digital power supply systems, motor controllers, medical equipment, communications systems, automotive voltage regulation, computer workstations, and industrial equipment. It offers a high efficiency, high speed transient response, low quiescent current operation, and features integrated safeguards for current and temperature protection. The LTM4628IY is a great choice for cost and space sensitive applications.

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