Voltage - Output 3:	--
Base Part Number:	LTM4649
Supplier Device Package:	68-BGA (15x9)
Size / Dimension:	0.59" L x 0.35" W x 0.19" H (15.0mm x 9.0mm x 4.9mm)
Package / Case:	68-BBGA Module
Mounting Type:	Surface Mount
Efficiency:	--
Operating Temperature:	-40°C ~ 125°C
Features:	OCP, OVP
Applications:	ITE (Commercial)
Current - Output (Max):	10A
Series:	µModule®
Voltage - Output 2:	--
Voltage - Output 1:	0.6 ~ 3.3 V
Voltage - Input (Max):	16V
Voltage - Input (Min):	4.5V
Number of Outputs:	1
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

LTM4649IY#PBF Application Field and Working Principle

The LTM4649IY#PBF is a synchronous monolithic step-down switching mode power supply with embedded FET in the 4x4mm 24-lead QFN power package. The converter offers excellent performance with an input voltage range up to 36V and excellent load and line regulation. The frequency of the into the device is set internally to 1.5MHz with SpreadSpectrum frequency reduction. The LTM4649IY#PBF is ideal for isolated and non-isolated (flyback) applications, such as industrial, automotive, telecommunications and medical systems.

Applications

The LTM4649IY#PBF is used for a variety of applications, including, but not limited to, powering low voltage digital logic, supplying power to bus voltages, driving backlight LEDs in LCD displays, and powering a wide variety of sensors and transducers. Additionally, it can be used to supply power to isolated DC-DCs, DC-AC inverters, and SMPS.

Working Principle

The LTM4649IY#PBF works by using an embedded N-channel MOSFET, switched at 1.5MHz. The LTM4649IY#PBF is designed to optimize the transient response, step load performance, and the line regulation of the converter. It uses a fixed frequency, current mode design to ensure optimal noise, minimal current ripple, and fast transient response. The design of the LTM4649IY#PBF includes a synchronous rectifier and the internal MOSFET, which allows for both low output ripple along with low output impedance, which contributes to excellent efficiency. This allows ample headroom at the output, as well as superior PSRR performance.

Features

The LTM4649IY#PBF provides a wide range of features, with the main features being its wide input range, excellent line and load regulation, high efficiency, fast transient response and loop compensation stability, as well as its small QFN package.The wide input voltage range allows for a wide flexibility of use. The device is rated for a maximum of 36V input voltage, but the input voltage can be as low as 6V and still be protected against over-voltage. This makes it ideal for applications where it may need to be powered with either a battery or an AC adapter.The excellent line and load regulation allows the LTM4649IY#PBF to maintain steady and precise output voltages even under varying line and load conditions. This makes it ideal for applications that require consistent voltage supply in less than ideal conditions.The internal switching frequency is 1.5MHz, which allows for small packages to be used. This increases device efficiency and also makes the device more compact. The fast transient response allows the device to quickly respond to changes in load conditions, making it suitable for applications requiring fast responses.The QFN package of the LTM4649IY#PBF is designed to provide a maximum of heat dissipation capability. The low profile, low thermal resistance of the package makes it suitable for applications in limited space, as well as applications that require a minimum heat dissipation.

Conclusion

In conclusion, the LTM4649IY#PBF is a versatile and efficient DC/DC converter with a wide range of features and applications. With its 36V input voltage rating, fast transient response and excellent line and load regulation, the LTM4649IY#PBF is an ideal choice for powering digital logic and a wide variety of sensors and transducers. Additionally, its small QFN package allows for it to be placed in a variety of limited spaces, where it can operate with high efficiency and minimal heat dissipation.

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