LM2687LDX/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2687LDX/NOPB is a low noise regulated switched capacitor voltage inverter manufactured by Texas Instruments. It functions as a negative adjustable charge pump switching regulator IC, providing a single output capable of delivering up to 10mA. The device operates within an input voltage range of 2.7V to 5.5V and features a typical operating supply current of 500µA. It supports a switching frequency of approximately 100kHz and includes an enable feature for power management. The component is housed in an 8-WFDFN package with an exposed pad and is rated for operation between -40°C and +105°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Provides negative voltage inversion using switched capacitor technology
• Features low noise regulation for sensitive analog circuits
• Includes an enable pin for controlled power consumption

Voltage Regulators - DC DC Switching Regulators Applications

• Biasing operational amplifiers requiring negative supply rails
• Powering RS-232 interface circuits from single positive supplies
• Providing gate drive voltages for N-channel MOSFETs

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free compliance and RoHS status. Confirm the 'L' variant designation matches the required thermal and electrical specifications for your application. Ensure the 8-WFDFN package footprint aligns with your PCB layout constraints. Cross-reference the manufacturer datasheet for exact pinout and thermal pad requirements before finalizing procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact solution is needed to generate a negative voltage from a single positive source without using inductors. It is suitable for applications requiring moderate current levels around 10mA. Consider the 100kHz switching frequency regarding EMI constraints. Evaluate the 500µA quiescent current against battery life requirements if used in portable devices.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2687 family of switched capacitor inverters. It is designed to replace traditional inductor-based inverting topologies where size and cost are critical factors. The device integrates the necessary control logic and switches into a small footprint, simplifying design implementation compared to discrete solutions.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other Texas Instruments switched capacitor inverters such as the LM2686 series for similar functionality. Verify pin compatibility and output current capabilities when considering alternatives from other manufacturers like Maxim Integrated or Analog Devices.