Voltage - Output 3:	0.8 ~ 5.5 V
Base Part Number:	LTM4633
Supplier Device Package:	144-BGA (15x15)
Size / Dimension:	0.59" L x 0.59" W x 0.20" H (15.0mm x 15.0mm x 5.0mm)
Package / Case:	144-BBGA Module
Mounting Type:	Surface Mount
Efficiency:	--
Operating Temperature:	-55°C ~ 125°C
Features:	OCP, OTP, OVP
Applications:	ITE (Commercial)
Current - Output (Max):	10A, 10A, 10A
Series:	µModule®
Voltage - Output 2:	0.8 ~ 1.8 V
Voltage - Output 1:	0.8 ~ 1.8 V
Voltage - Input (Max):	16V
Voltage - Input (Min):	2.38V
Number of Outputs:	3
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

Introduction

DC DC converters are a type of electronic device that can convert a dc voltage of one polarity to another dc voltage of the opposite polarity. DC DC converters are used in a variety of applications such as power supplies, telecommunication systems, railway applications and military systems. The LTM4633MPY is an example of a dc-dc converter that can be used in application fields such as these. In this document, the application field and working principle of the LTM4633MPY will be examined.

Application Fields of the LTM4633MPY

The LTM4633MPY dc-dc converter is a controller IC that can be used to control dc-dc switching converters with low current requirements. The device is capable of operating from input voltages between 4V and 16V, which makes it an ideal choice for applications such as automotive systems, battery-powered systems, and portable devices.The chip contains an integrated N-channel MOSFET and can deliver up to 3.5 A of continuous output current at over 90% efficiency. It also features a wide input voltage range, automatic skip mode operation, programmable soft-start, programmable frequency, and frequency synchronization.

Working Principle of the LTM4633MPY

The LTM4633MPY uses a switched-mode power supply topology that is composed of an inductor, a diode, a capacitor, and a switch. When the switch is in the OFF position, current is stored in the inductor. When the switch is in the ON position, current is allowed to flow through the diode and the stored energy is released. The capacitor serves as a filter to smooth out the ripple voltage.The LTM4633MPY incorporates a regulated Pulse-Width Modulation (PWM) controller that operates at constant frequency. The PWM controller is composed of a reference source, an error amplifier, an oscillator, and a comparator. The oscillator generates a triangle wave and the comparator compares the triangle wave with a reference signal that is processed by the error amplifier. When the triangle wave signal exceeds the reference signal, the PWM output is set to OFF and when the triangle wave signal falls below the reference signal, the PWM output is set to ON.

Conclusion

The LTM4633MPY is an integrated dc-dc converter controller IC that can be used for applications such as automotive systems, battery-powered systems, and portable devices. The device is capable of delivering up to 3.5 A of output current and features a wide input voltage range, automatic skip mode operation, programmable soft-start, programmable frequency, and frequency synchronization. The LTM4633MPY uses a switched-mode power supply topology and a regulated Pulse-Width Modulation (PWM) controller to regulate the output voltage.

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