LP3872ESX-3.3/NOPB

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The LP3872ESX-3.3/NOPB is a fixed-output low-dropout linear regulator manufactured by Texas Instruments, providing a stable 3.3 V output at up to 1.5 A. It operates within an input voltage range of 2.5 V to 7 V and features ultra-low dropout characteristics, typically 38 mV at 150 mA and 380 mV at 1.5 A load. The device incorporates shutdown functionality reducing quiescent current to 10 nA, an error flag for output status monitoring, and built-in overcurrent and overtemperature protection.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Ultra-low dropout voltage performance with fast transient response
• Shutdown mode reduces quiescent current to 10 nA typical
• Integrated error flag indicates output voltage drop below nominal
• Built-in thermal and short-circuit protection safeguards operation

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Microprocessor power supplies
• GTL, GTL+, BTL, and SSTL bus terminators
• Power supplies for DSPs
• SCSI terminators
• Post regulators in high-efficiency linear designs

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific package variant matches the required footprint, as the LP3872 series includes TO-263, SOT-223, and TO-220 options. Confirm that the 'NOPB' suffix denotes lead-free and RoHS compliance. Ensure the selected component aligns with the exact output voltage tolerance requirements for the target application circuit.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this regulator when low dropout voltage and high efficiency are critical for battery-powered or low-voltage systems. The LP3872 is suitable for applications requiring remote load regulation via the ERROR flag but does not include the SENSE pin found in the LP3875 variant. Consider thermal resistance and ambient temperature constraints when designing for maximum continuous current loads.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This component belongs to the LP387x family of fast ultra-low-dropout linear regulators developed on a CMOS process. The series allows for low quiescent current independent of load current. The LP3872 specifically provides an error flag for system monitoring, distinguishing it from the LP3875 which offers a remote sense option instead.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

LP3875ESX-3.3/NOPB: Offers identical electrical performance but replaces the ERROR flag with a SENSE pin for remote regulation.