LMR10515XSDE/NOPB Integrated Circuits (ICs)

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The LMR10515XSDE/NOPB is a synchronous buck switching regulator. It is classified as part of the Power Management Integrated Circuit (PMIC) family, nested into the Voltage Regulators, and the DC DC Switching Regulators category. It is a low output voltage regulator with a synchronous buck-converter topology that is digitized with a buck converter running at fixed frequency.

Product Features

• 2.15 V to 14 V Input Voltage Range
• 1.15 V to 5.5 V Output Voltage Range
• Low Quiescent Current: 5 mA
• Stable with ceramic output cap
• Adjustable Frequency up to 1.5 MHz
• High Efficiency: Up to 93%
• Integrated High and Low-side MOSFETs
• Adjustable Output Current Limit
• Output Over-Voltage Protection
• OVLO, UVLO, and OTP Protection
• Thermal Shutdown
• 8-lead NSOP Package

The LMR10515XSDE/NOPB synchronous buck regulator provides excellent performance, providing accurate and stable voltage output in a wide input voltage range from 2.15 V to 14 V, making it suitable for a variety of applications. The output voltage is adjustable from 1.15 V to 5.5 V with excellent line-regulation. This regulator is also capable of delivering up to 3A output current. The low quiescent current of 5 mA, combined with excellent efficiency of up to 93%, provides longer system runtimes and useful in battery-powered applications.

Working Principle

The LMR10515XSDE/NOPB is a synchronous buck regulator. It consists of an integrated high-side MOSFET and a low-side MOSFET transistor. It is controlled by a Pulse Width Modulation (PWM) circuit. The PWM controller is fed with a reference clock. The output voltage is regulated by varying the duty cycle of the PWM signal. The high side and low side MOSFETs switch simultaneously as the PWM signal changes.

The current through the synchronous MOSFETs is controlled using a limited current source that senses the voltage drop across a current sensing resistor. This functionality of the synchronous buck regulator makes it significant for applications requiring precise current control. The maximum current is adjustable via an external RCS pin.

Applications

The LMR10515XSDE/NOPB synchronous buck switching regulator provides excellent performance in a variety of applications. It is ideal for powering communication systems, hard disk drives, and other voltage-stablised systems. It can also be used in automotive, industrial, and consumer electronics. Its low quiescent current and excellent efficiency are advantageous for battery-powered and portable applications.

Conclusion

The LMR10515XSDE/NOPB synchronous buck switching regulator is an excellent choice for applications that require reliable and accurate voltage output in an adjustable voltage range. Its low quiescent current, stable performance with ceramic output cap, adjustable frequency, high efficiency, and protection features make it suitable for many applications and an excellent choice for a power management solution.

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