LM2781TP/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2781TP/NOPB is a fixed negative output charge pump voltage regulator manufactured by Texas Instruments. It operates within an input voltage range of 1.8V to 5.5V, making it suitable for single-cell lithium-ion or standard logic systems. The device provides a fixed negative output with a maximum output current of 50mA and features a switching frequency of 210kHz. It does not utilize synchronous rectification. The component is housed in an 8-DSBGA package and is rated for an operating temperature range of -40°C to 85°C (TA).

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Provides a fixed negative output voltage via charge pump topology.
• Operates efficiently from a wide input voltage range of 1.8V to 5.5V.
• Designed for ratiometric functionality in battery-powered applications.

Voltage Regulators - DC DC Switching Regulators Applications

• Battery-powered devices requiring negative supply rails.
• Systems utilizing single-cell lithium-ion batteries.
• Standard 3.3V or 5V logic systems needing inverted voltage.

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the obsolete status of this specific part number before procurement planning. Confirm that the 8-DSBGA package and 50mA current capability meet system requirements. Ensure compatibility with existing PCB footprints as surface-mount technology is required. Check for available alternative components due to potential end-of-life constraints.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact negative voltage source is needed from a low-voltage input. The 210kHz switching frequency allows for smaller external components compared to lower-frequency alternatives. Consider the 50mA limit for load requirements. The -40°C to 85°C range suits general commercial and industrial environments without extreme thermal management.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the Texas Instruments PMIC family, specifically DC-DC regulators. It functions as a charge pump to generate negative voltages from positive inputs. The NOPB suffix indicates lead-free and RoHS compliance. It is distinct from operational amplifiers or linear regulators, serving a specific power management role in portable electronics.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Public confirmed substitute part numbers are not provided in the available documentation. Due to the obsolete status, engineers should evaluate newer Texas Instruments charge pump regulators or compatible third-party equivalents with matching 8-DSBGA packages and electrical specifications.