LP38692SDX-ADJ

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

The LP38692SDX-ADJ is a low dropout CMOS linear regulator from Texas Instruments featuring an adjustable output voltage range of 1.25 V to 9 V and a maximum input voltage of 10 V. It provides a continuous output current of 1 A with a typical dropout voltage of 450 mV at full load. The device incorporates a precision bandgap reference with 2.5% accuracy and includes an enable pin for power management. It operates within a temperature range of -40°C to +125°C and utilizes a 6-pin WSON package.

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

• Features an integrated enable pin that allows external control to turn the regulator on or off, reducing quiescent current to approximately 1 µA in the off state.
• Utilizes a PMOS power transistor architecture to maintain ground pin current below 100 µA regardless of load conditions.
• Incorporates thermal overload protection and foldback current limiting to safeguard against overheating and excessive load currents.

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

• Hard Disk Drives
• Notebook Computers
• Battery-Powered Devices
• Portable Instrumentation

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

Verify the specific suffix 'SDX' corresponds to the WSON-6 package configuration as indicated by datasheet documentation. Confirm the presence of the enable pin functionality required for the application design. Ensure compatibility with ceramic output capacitors to maintain stability. Cross-reference the manufacturer part number with official TI databases to validate production status and revision history before procurement.

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

Select this component when a 1 A output current capability is required alongside precise voltage adjustment. The inclusion of the enable pin makes it suitable for systems requiring power sequencing or standby modes. Verify that the input voltage remains within the 2.7 V to 10 V range and that the thermal environment supports the specified operating junction temperature limits.

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

This device belongs to the LP3869x-ADJ family of low dropout regulators manufactured by Texas Instruments. It shares core electrical characteristics with the LP38690-ADJ but distinguishes itself through the addition of an enable pin. The family is designed for portable applications requiring high efficiency and stability with ceramic capacitors.

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

LP38690SDX-ADJ/NOPB serves as a functional substitute lacking the enable pin feature. LP38692MP-ADJ/NOPB offers identical electrical performance in a SOT-223-5 package instead of WSON-6. LP38693QSD-ADJ/NOPB provides similar regulation in an automotive-grade variant with a 500 mA output limit.

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

How does the enable pin affect the quiescent current?

When the enable pin is pulled low, the device enters an off state where the quiescent current drops to approximately 1 µA, significantly reducing power consumption compared to the active state.

What type of output capacitor is recommended for stability?

The regulator is designed to be stable with ultralow ESR ceramic output capacitors. A minimum capacitance of 1 µF is required, and X7R or X5R dielectric types are strongly recommended.