LD2985BM25R Integrated Circuits (ICs)

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LD2985BM25R Application Field and Working Principle

LD2985BM25R belongs to a series of low-dropout (LDO) positive voltage regulators with integrated pass elements. It is a revolutionary linear voltage regulator that provides improved transient response and greater control current accuracy. This low-dropout regulator is designed to allow for easy implementation into a variety of applications, such as powering multiple logic circuits, consumer electronics, and communications systems.

Classification

LD2985BM25R belongs to the PMIC - Voltage Regulators - Linear classification.

Main Features

• Wide Operating Input Range: 4.5V to 20V
• High Voltage Range: 5.5V to 15V
• Low Quiescent Current: 490nA typ
• Low Dropout Voltage: 200mV typ
• Low Output Voltage Noise: 8μVrms
• High Output Noise Rejection: 46dB at 1kHz
• Soft-start With Adjustable Current Limit
• Stable with Low-ESR Ceramic Output Capacitors
• Low Temperature Hysteresis
• Available in Standard SO-8 Package

The LD2985BM25R is capable of supplying up to 500mA of output current with a dropout voltage of only 200mV. With its wide input voltage range and low quiescent current, the LD2985BM25R is well suited for powering applications with multiple logic circuits and consumer electronics products.

Working Principle

The LD2985BM25R utilizes a topology which combines a linear voltage regulator and a pass transistor to provide improved transient response and greater control current accuracy. This regulator has a reference voltage, which is compared with the output voltage. When the output voltage falls below the reference voltage, the pass element will turn on and supply current to the output. When the output voltage exceeds the reference voltage, the pass element turns off and the output voltage is maintained.

Load Regulation, Dropout Voltage, Output Noise, and Quiescent Current are measured during the regulator\'s operation. Load Regulation is measured under maximum load and the difference between the output voltage with and without the load. Dropout voltage is measured at the point where the pass element is just beginning to turn on. Output noise is measured using an oscilloscope and the peak to peak noise is calculated. Quiescent current is measured with no load connected to the output.

The LD2985BM25R is designed to provide accurate regulation with very low dropout voltage and low noise. The regulator has a wide input voltage range of 4.5V to 20V and a high voltage range of 5.5V to 15V. It has a low quiescent current of 490nA and a low dropout voltage of 200mV. The low dropout voltage ensures a stable output voltage over a wide range of load and environmental conditions.

The LD2985BM25R also features a soft-start with adjustable current limit, which prevents the output voltage from over-shooting when the regulator is powered up. It also has a low temperature hysteresis, which prevents the output voltage from changing significantly with changes in ambient temperature. The regulator is stable with low-ESR ceramic output capacitors, and it is available in a standard SO-8 package.

Applications

The LD2985BM25R is well suited for powering multiple logic circuits, consumer electronics, and communications systems. It is also suitable for automotive industrial and computer applications. It is a high-performance voltage regulator that can deliver up to 500mA of current with accuracy and low dropout voltage. Its low noise and wide input voltage range make it well suited for powering multiple logic circuits and consumer electronics products.

The LD2985BM25R can also be used in power management solutions. Its low dropout voltage and low noise make it suitable for powering sensitive analog devices such as audio amplifiers, motor drivers, and charge pumps. It can also be used in battery management systems and switching regulators for portable battery powered systems.

Conclusion

The LD2985BM25R is a low-dropout linear voltage regulator that provides improved transient response and greater control current accuracy. It belongs to the PMIC - Voltage Regulators - Linear classification. This regulator is capable of supplying up to 500mA of output current with a dropout voltage of only 200mV. It is well suited for powering multiple logic circuits, consumer electronics, and communications systems. It also provides low noise and wide input voltage range, making it suitable for powering multiple logic circuits and consumer electronics products.

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