LP3996SD-3033/NOPB

Introduction

LP3996SD-3033/NOPB is a monolithic regulator IC (Integrated Circuit), which belongs to the family of voltage regulators. It is part of Texas Instruments\' solutions for voltage regulation. The IC provides the power supply design engineer with a simple way to develop efficient, simplified and robust solutions for regulating the output voltage from a wide range of input sources.

Performance

LP3996SD-3033/NOPB has an operational range of between 2.7V to 13.2V and is a linear controller. The output voltage range is 0.8V to 3.3V and the regulation is set by an external resistor divider or a high-impedance potentiometer. This feature gives design engineers the flexibility to create power supplies with different output voltages. The operating current of the IC is 0.75mA at 2.7V VCC and 0.34mA at 13.2V VCC, which helps to maximize efficiency in the design. The IC can provide up to 600 mA output current, and has good line and load transient performance.

Features

The features of the LP3996SD-3033/NOPB make it highly effective for a variety of applications. It requires a limited number of external components and has a low power quiescent current, enabling designers to keep the Bill Of Materials (BOM) low. The IC provides a soft start option to prevent over-shoot at power-up, current limit and thermal shutdown for protection. Furthermore, the IC features an enable pin to enable/disable the output voltage and a power good output that indicates when the output is within tolerance.

Applications

LP3996SD-3033/NOPB is designed for use in many applications, including portable electronic devices such as cellular phones, PDAs and digital still cameras, which require a low quiescent current, low noise and high transient performance. It is also suitable for different telecommunications and networking systems, such as Network Interface Controllers (NICs) and switches, and industrial applications like factory automation and medical equipment.

Working Principle

LP3996SD-3033/NOPB operates on the principle of linear voltage regulation. It uses an external voltage divider or potentiometer circuit to control the output voltage. The voltage divider circuit is composed of two resistors, R1 and R2, connected in series. The output voltage is set by the ratio of these two resistors. The LP3996SD-3033/NOPB includes an internal error amplifier and current sources to maintain a constant voltage output, even if the input voltage or load current changes. When the output voltage is above the set value, the error amplifier reduces the output current of the PMIC until the correct voltage is achieved. Conversely, when the output voltage falls below the set value, the error amplifier increases the output current. Thus, the output voltage is regulated over a wide range of input voltages and currents.

Conclusion

LP3996SD-3033/NOPB is a highly effective linear regulator IC, which can provide robust, efficient and simplified supply design solutions for a wide range of applications. It requires a minimal number of external components and provides a low quiescent current. The IC also has a soft start feature, and current limit and thermal shutdown protection. Its performance and features make it suitable for applications such as handheld electronic devices, NICs and switches, and industrial applications.