LM2937IMPX-15/NOPB

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LM2937IMPX-15/NOPB is an integrated voltage regulator IC that belongs to a family of linear voltage regulators (PMIC - Voltage Regulators - Linear). It is designed to provide a low-voltage regulated output, and features low quiescent current and shutdown current for battery-powered applications. LM2937IMPX-15/NOPB is especially suitable for applications with limited space, such as watches and remote wireless applications.

LM2937IMPX-15/NOPB contains a voltage reference, an error amplifier, a peak current-limit/undervoltage lockout circuit, and a series regulator. It operates by controlling the on-time of an external n-channel FET, so that the output voltage is regulated in relation to the reference voltage. It has an internal current-limit protection circuit that prevents overloading.

When using LM2937IMPX-15/NOPB, a logic-level P-channel MOSFET or N-channel MOSFET is needed to maintain the output voltage at the desired level. The voltage drop across the power MOSFET is small enough to allow the LM2937IMPX-15/NOPB to be operated at high efficiency. The power MOSFET needs to be chosen appropriately according to power needs and voltage tolerance requirements.

In order to ensure reliable regulation, an external compensation network must be connected. This compensates for the voltage drop across the power MOSFET and ESR of the output capacitor. Compensation is important for maintaining accuracy over the total load current range. Additionally, an undervoltage lockout circuit is provided for heavy load conditions, which prevents the regulator from entering a low-output state.

In summary, the LM2937IMPX-15/NOPB integrates a number of components and functions into a single IC, making it an ideal solution for battery-powered applications. It is easy to use and offers excellent regulation accuracy over a wide range of load currents. Its small size and low quiescent current make it a great choice for space-constrained applications.

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