LP3985ITLX-5.0/NOPB

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

The LP3985ITLX-5.0/NOPB is a micropower, low-noise ultra low-dropout CMOS voltage regulator manufactured by Texas Instruments. It provides a fixed 5.0 V output with a maximum load current of 150 mA. The device operates within an input voltage range up to 6 V and maintains a typical dropout voltage of 60 mV at full load. Quiescent current is specified at 250 µA. It features high power supply rejection ratio performance and includes internal protection against overcurrent, thermal overload, and short circuits. The component is designed for surface-mount installation in a 5-DSBGA package.

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

• Ultra-low dropout voltage capability ensures efficient regulation with minimal headroom requirements.
• Low noise architecture minimizes output ripple for sensitive analog and RF circuit applications.
• Integrated enable pin allows for precise power management and system-level control.
• Comprehensive protection mechanisms include overcurrent limiting, thermal shutdown, and reverse polarity blocking.

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

• Portable battery-powered electronic devices requiring efficient linear regulation
• Wireless communication modules and RF front-end power supplies
• Microcontroller and digital signal processor core voltage rails
• Medical instrumentation and handheld diagnostic equipment

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

Verify the specific suffix ITLX indicates the tape-and-reel packaging format distinct from cut-tape or tube variants. Confirm that the NOPB designation ensures compliance with RoHS standards and absence of hazardous substances. Cross-reference the manufacturer part number against official Texas Instruments distribution channels to ensure authenticity. Validate that the 5-DSBGA footprint matches the target PCB land pattern dimensions precisely before procurement.

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

Select this regulator when a fixed 5.0 V output is required with minimal quiescent current consumption. The SOT-23/DSBGA form factor suits space-constrained designs compared to larger packages. Ensure the input voltage remains within the 6 V maximum limit while accounting for transient spikes. Consider the thermal resistance characteristics of the DSBGA package for heat dissipation in enclosed environments relative to higher current demands.

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

This component belongs to the LP3985 series of micropower LDO regulators from Texas Instruments. The series offers various fixed output voltages ranging from 2.5 V to 5.0 V. The ITLX variant specifically denotes the DSBGA-5 package configuration, distinguishing it from IM5 (SOT-23-5) versions. All variants share identical electrical performance characteristics including noise specs and dropout voltage profiles.

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

• LP3985IM5X-5.0/NOPB
• LP3985ITL-5.0/NOPB

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

What is the typical dropout voltage at maximum load?

The typical dropout voltage is 60 mV when delivering 150 mA of output current.

Does the device support external adjustment of the output voltage?

No, the LP3985ITLX-5.0/NOPB provides a fixed 5.0 V output and does not support external resistor network adjustment.

What protection features are included internally?

The device includes overcurrent protection, thermal shutdown, and reverse polarity blocking to safeguard the regulator and load.