LM5165QDRCRQ1

Series:	Automotive, AEC-Q100
Packaging:	Tape & Reel (TR)
Part Status:	Active
Function:	Step-Down
Output Configuration:	Positive
Topology:	Buck
Output Type:	Adjustable
Number of Outputs:	1
Voltage - Input (Min):	3V
Voltage - Input (Max):	65V
Voltage - Output (Min/Fixed):	1.223V
Voltage - Output (Max):	65V
Current - Output:	150mA
Frequency - Switching:	Up to 600kHz
Synchronous Rectifier:	Yes
Operating Temperature:	-40°C ~ 150°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	10-VFDFN Exposed Pad
Supplier Device Package:	10-VSON (3x3)

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LM5165QDRCRQ1 is a 12V input, 16V output single switch step-down DC-DC switching regulator aimed at providing ultra-high efficiency and excellent line/load regulation with very low external component count. It integrates a variety of features that make the device suitable for a wide range of SMPS applications.

Application field of LM5165QDRCRQ1

The LM5165QDRCRQ1 is suitable for many different types of DC-DC switching regulator applications. It is suitable for battery-powered mobile equipment and other portable applications, such as consumer electronics, smart phones, handhelds, PDAs, and notebook computers. It’s also suitable for various industrial and automotive applications, providing high efficiency and low cost.

Working Principle of LM5165QDRCRQ1

LM5165QDRCRQ1 provides ultra-high switching efficiency through a synchronous rectifying topology, converting a 12V input voltage into a 16V output with excellent line/load regulation. The device also integrates several features to minimize external components and make it suitable for a wide range of applications.The LM5165QDRCRQ1 features an integrated, adjustable frequency PWM controller, and can be operated in either Burst Mode® operation or Pulse Width Modulation (PWM) mode. In Burst Mode operation mode, pulse-by-pulse current limiting is implemented to protect the device during overload conditions. Some additional features of this device include programmable soft start and over temperature protection. In addition, the LM5165QDRCRQ1 includes a number of protective features, such as internal thermal shut down and over voltage protection. Also, the device offers a wide input voltage range, from 4.2V to 28V for ±2%.The LM5165QDRCRQ1 uses synchronous rectification with MOSFET switch to achieve high efficiency. The synchronous rectification is enabled when a signal appears at the PHASE pin and goes low. This signal is obtained by a feedback voltage operations applied to the SS voltage andfeed on the FB pin. When the synchronized rectification is enabled, the NMOS MOSFET switch is switched to the active state, engaging the rectifier and allowing current from the output side of the inductor to the output capacitor.

Conclusion

The LM5165QDRCRQ1 is a versatile and efficient DC-DC switching regulator. It is suitable for many types of applications, including battery-powered mobile equipment and other portable applications, as well as industrial and automotive applications. It features a synchronous rectifying topology that provides excellent efficiency and low external component count. The device also integrates several features to minimize external components and provide good protection.

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