LM2780TP/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2780TP/NOPB is a charge pump voltage regulator manufactured by Texas Instruments. It functions as an inverting charge pump, converting positive input voltages to negative output voltages. The device supports an input voltage range of 1.8V to 5.5V and provides a maximum output current of 50mA. It operates with a switching frequency of 12kHz and features synchronous rectification for improved efficiency. The component is housed in an 8-pin USMD package and is rated for an operating temperature range of -40°C to 85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Inverts input voltage to generate a negative output rail
• Integrated synchronous rectification for high efficiency
• Low switching frequency operation reduces external component size
• Compact surface-mount packaging suitable for space-constrained designs

Voltage Regulators - DC DC Switching Regulators Applications

• Biasing circuits requiring negative supply rails
• LCD bias voltage generation
• Op-amp dual supply configurations
• Sensor interface circuits needing negative reference voltages

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the exact suffix (NOPB) indicates lead-free and RoHS compliance when ordering. Confirm the package type matches the design footprint requirements. Ensure the input voltage does not exceed the 5.5V absolute maximum rating. Check that the required negative current stays within the 50mA limit. Validate the operating temperature range against the application environment.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact solution for generating a negative voltage from a single positive source is required. It is suitable for low-power applications where the 50mA current limit is sufficient. Consider the 12kHz switching frequency for noise-sensitive designs. Compare with other charge pumps if higher current or different topologies are needed.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2780 family of charge pump regulators. It is designed for simple inverting power supply applications. The NOPB suffix denotes environmental compliance. It serves as a cost-effective alternative to inductor-based inverting DC-DC converters for low-current needs.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Check for direct pin-compatible substitutes such as the LM2781 series if non-inverting functionality is required. Verify electrical parameters like output current and input voltage range match the original design specifications before substitution.