LM5117PSQE/NOPB

Frequency - Switching:	200kHz, 480kHz
Base Part Number:	LM5117
Supplier Device Package:	24-WQFN (4x4)
Package / Case:	24-WFQFN Exposed Pad
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Frequency Control, Ramp, Soft Start
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	--
Series:	--
Voltage - Supply (Vcc/Vdd):	5.5 V ~ 65 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The LM5117PSQE/NOPB is a Pulsewidth Modulation (PWM) Controller, a type of DCDC Switching Controller. It is used in systems where a steady voltage output is desired despite the input voltage fluctuating. The output voltage is set via a voltage divider connected to the VSET pin on the LM5117, and the device adjusts the duty cycle of the power supply to keep the output voltage constant. The LM5117 is a good choice for applications that require efficient, low-noise power conversion.

Features

The LM5117PSQE/NOPB has several features that make it a good choice for power conversion applications. First, it has an adjustable switching frequency, allowing the user to tailor it to the application\'s needs. In addition, the LM5117 also has reverse input voltage protection, which ensures the device will not be damaged if the input voltage exceeds the maximum specified range. Other features include a low quiescent current, adjustable soft start, over-temperature protection, and adjustable frequency spread spectrum.

Application Fields

The LM5117PSQE/NOPB can be used in a variety of applications. It is suitable for small to medium size power supplies, voltage regulation, DC-DC conversion, and more. It is ideal for PC motherboards, servers, laptops, gaming consoles, and communications equipment. The device is also suitable for industrial and automotive applications.

Working Principle

The LM5117PSQE/NOPB works by controlling the duty cycle of the power supply connected to it. When the input voltage rises, the duty cycle is decreased to maintain a steady voltage output. When the input voltage drops, the duty cycle is increased to maintain the output voltage. This process is continuous, allowing the LM5117 to maintain a steady output voltage even when the input voltage fluctuates.

Conclusion

The LM5117PSQE/NOPB is an adjustable pulse-width modulated controller that is suitable for applications requiring efficient, low-noise power conversion. It has several features that make it advantageous for power conversion applications, including adjustable switching frequency, reverse input voltage protection, low quiescent current, adjustable soft start, and more. The LM5117 is suitable for a variety of applications, including PC motherboards, servers, laptops, gaming consoles, communications equipment, and industrial and automotive applications.

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