LP3972SQ-5810/NOPB

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Applications:	Processor
Current - Supply:	60µA
Voltage - Supply:	2.7 V ~ 5.5 V
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	40-WFQFN Exposed Pad
Supplier Device Package:	40-WQFN (5x5)
Base Part Number:	LP3972

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Introduction

LP3972SQ-5810/NOPB is a 3A, step-down power management integrated circuit (PMIC) optimized for mobile and battery powered applications. With an integrated power FET and ±1.5% accurate output voltage, it helps reduce power loss and extend battery life. It also has a wide range of features to minimize noise, including low ripple over current, soft start, and dynamic fall-back mode. This article will discuss the application field, which is specialized power management, and the working principle of the LP3972SQ-5810/NOPB.

Application Field – Specialized Power Management

The LP3972SQ-5810/NOPB PMIC is designed for mobile and battery powered applications. It can provide 3A continuous current and up to 6A peak current without external components. This device can be used in a variety of applications, including battery powered devices, wearable electronics, and handheld devices. Other potential uses for this device are in laptop PCs, automotive applications, and industrial controllers.

Working Principle

The LP3972SQ-5810/NOPB PMIC is a step-down power management integrated circuit (PMIC) optimized for mobile and battery powered applications. It utilizes a buck-boost architecture to maintain the output voltage regardless of the input voltage. The device is housed in a thermally-enhanced 8-pin package. It includes a 150 mV reference voltage, an internally trimmed reference voltage, an integrated power FET, and an error amplifier. In addition, it has a wide range of features to minimize noise, including low ripple over current, soft start, and dynamic fall-back mode. The chip operates from an input voltage range of 2.5 V to 19 V and can provide a stable output voltage of up to 5.5 V. It also has a wide operating temperature range (over-temperature protection) and a low standby current. The working principle of the LP3972SQ-5810/NOPB is based on a buck-boost architecture. This architecture enables the PMIC to maintain a stable output voltage regardless of the input voltage. The internal control loop compares the output voltage to the internally trimmed reference voltage and adjusts the duty cycle of the power FET accordingly. The integrated power FET switch reduces switching losses, allowing the device to support higher output current. In addition, the chip also includes soft start and dynamic fall-back mode to reduce output noise and limit inrush current.

Conclusion

LP3972SQ-5810/NOPB is a 3A, step-down power management integrated circuit (PMIC) optimized for mobile and battery powered applications. It is classified as a specialized power management IC and is designed for applications that require a wide range of features, including low ripple over current, soft start, and dynamic fall-back mode. The chip operates from an input voltage range of 2.5 V to 19 V and can provide a stable output voltage of up to 5.5 V. It is housed in a thermally-enhanced 8-pin package and utilizes a buck-boost architecture for stable output voltage.

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