NCP5201MNG

PMIC - Voltage Regulators - Special Purpose

The NCP5201MNG is a high-performance negative voltage linear regulator in a 4-lead, SOT-23-4, TO-252-4, and TO-226-4 packages for space-constrained applications. It is capable of providing a negative supply voltage from an input voltage range of 1.8V to 6V. The device only requires a minimum input voltage difference of 1.2V between the input and output voltages to operate effectively.

The device is designed to provide a stable output voltage while consuming very low quiescent current of 5μA over the entire input voltage range. The low quiescent current, combined with an extremely low electromagnetic interference (EMI) signature, makes the device an ideal supplement to switch-mode power supplies or to the various systems that require high performance in small packages.

The NCP5201MNG has an internal high-precision regulation control circuit that acts as a voltage reference that eliminates the need for external voltage reference components. This helps reduce overall component count and power dissipation compared with other solutions.

The device features an over-temperature shutdown and under-voltage lockout, eliminating the inconvenience associated with additional components for system protection. The NCP5201MNG has a wide operating temperature range of –40°C to 125°C and is ideal for applications such as computing, telecom, automotive, and industrial systems.

Application Field

The NCP5201MNG can be used in many devices and applications where an adjustable, low voltage negative linear regulator is needed. This device is well suited for use in various system environments that require small packages and low quiescent current. Examples of such applications include:

• Smartphones
• Personal Digital Assistants (PDAs)
• Notebooks
• Notebook docking stations
• Camera modules
• Portable media players
• GPS systems
• Industrial systems

Working Principle

The NCP5201MNG is a negative voltage linear regulator from On Semiconductor. Its working principle involves regulating the output voltage by comparing the voltage at its output terminal to the voltage at its reference pin. If the voltage at its output is higher than the voltage at its reference pin, it reduces the output voltage so that it matches the reference pin voltage. This is achieved by sourcing or sinking a current proportional to the difference between the output and reference pin voltages.

The device has a power stage with a pass transistor and a feedback circuit, which is used to sense the output voltage and provide a feedback control signal. The feedback circuit drives the gate of the pass transistor with the control signal such that the output voltage is maintained at the desired level. This is done with the help of a ramp generator, which takes a reference voltage as an input and provides a ramp signal to the comparator present in the feedback circuit.

The feedback voltage is adjustable using an external resistor divider network. This allows users to adjust the output voltage as per their requirement. Moreover, the NCP5201MNG has low quiescent current, over-temperature shutdown, and under-voltage lockout. These features make the device well-suited for use in various power management applications.

Conclusion

The NCP5201MNG is an advanced negative voltage linear regulator from On Semiconductor designed to provide a stable and accurate output voltage while consuming very low quiescent current and featuring low EMI. The low power requirements, small form factor and wide range of protection features make the NCP5201MNG an ideal solution for space-constrained application fields such as smartphones, PDAs, notebooks, cameras, and industrial systems.