LTM8046IY

Voltage - Output 3:	--
Base Part Number:	LTM8046
Supplier Device Package:	51-BGA (15x9)
Size / Dimension:	0.59" L x 0.44" W x 0.19" H (15.0mm x 11.3mm x 4.9mm)
Package / Case:	51-BBGA Module
Mounting Type:	Surface Mount
Efficiency:	--
Operating Temperature:	-40°C ~ 125°C
Features:	--
Applications:	ITE (Commercial)
Voltage - Isolation:	3kV
Current - Output (Max):	500mA
Series:	µModule®
Voltage - Output 2:	--
Voltage - Output 1:	1.8 ~ 12 V
Voltage - Input (Max):	31V
Voltage - Input (Min):	3.1V
Number of Outputs:	1
Type:	Isolated Module
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tray

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DC DC Converters

DC-DC converters provide the interface between different sources of energy or components with different requirements for voltage or current levels. DC-DC converters are essential elements in many electronics, automotive, communication and industrial systems. The LTM8046IY is an example of a high-efficiency, ultra-low Iq, 3.3V to 10V input step-up DC-DC converter. In this article, the application field and working principle of this converter will be discussed.

Application Fields

The LTM8046IY application field is broad and includes applications in consumer electronics, communications, automotive, and industrial systems. This 3V to 10V step-up DC-DC converter supports up to a 48V input voltage and can deliver 3A of continuous output current. It has internal protection features such as input undervoltage lockouts and short circuit protection. Therefore, this step-up DC-DC converter is suitable for use in battery-powered mobile applications. Moreover, the LTM8046IY has a very low quiescent current, making it suitable for applications that need to minimize power consumption. This step-up DC-DC converter also has a low profile package with an integrated heat sink that makes it suitable for applications that need efficient thermal management.

Working Principle

The LTM8046IY step-up DC-DC converter works on an all-brick-block design and consists of several main blocks, including the power stage, a voltage reference, a control loop, and the logic block. First, the power stage is composed of two high-side power MOSFETs and two low-side PWM switches, and this power stage is all controlled by the logic block. Second, there are two voltage references, an internal 1.24V voltage reference and an external voltage reference, that are used to control the output voltage. The external voltage reference will feed the voltage loop comparator to set the output voltage and this voltage loop comparator will regulate the output voltage to the desired level. Third, the control loop is composed of a PWM comparator and an error amplifier. The PWM comparator is used to compare the feedback voltage with the reference voltage and the error amplifier is used to amplify the error voltage. The output of the error amplifier will then be used to control the gate of the high-side and low-side power MOSFETs, thus achieving the desired output voltage.

Conclusion

The LTM8046IY is a high-efficiency, ultra-low Iq, 3.3V to 10V input step-up DC-DC converter with a broad application field in consumer electronics, communications, automotive, and industrial systems. The working principle of this step-up DC-DC converter consists of four main blocks that include the power stage, voltage reference, control loop, and logic block. Overall, the LTM8046IY is a highly-efficient, low quiescent current, and high-current conversion device that is suitable for many applications.

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