LP38693SDX-ADJ

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

The LP38693SDX-ADJ is a 500-mA low-dropout CMOS linear regulator with an adjustable output voltage ranging from 1.25 V to 9 V. It operates within an input voltage range of 2.7 V to 10 V and features a typical dropout voltage of 250 mV at full load. The device includes an enable pin for power control, maintains a ground pin current of 55 µA, and incorporates thermal overload protection and foldback current limiting. It is housed in a 6-pin WSON package.

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

• Adjustable output voltage set via external resistors
• Integrated enable pin for system power management
• Stable operation with ultra-low ESR ceramic capacitors
• Built-in thermal shutdown and foldback current limiting

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' against the manufacturer's official orderable addendum to confirm the exact package type (WSON vs SOT-223) and tape-and-reel specifications. Ensure the component meets RoHS3 compliance requirements for your assembly process. Cross-reference the datasheet revision date to confirm the accuracy of electrical characteristics before finalizing procurement.

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

Select this component when an adjustable output voltage is required alongside high efficiency and low quiescent current. The LP38693-ADJ is suitable for designs needing an enable function to minimize power consumption during standby. Verify that the application environment stays within the -40°C to +125°C operating temperature range and that the input voltage does not exceed the maximum rating.

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

This part belongs to the LP3869x-ADJ family of low-dropout regulators manufactured by Texas Instruments. The series is designed for portable applications requiring stable performance with small ceramic capacitors. The LP38693 variant specifically distinguishes itself by including an enable pin, unlike the LP38691, while sharing similar electrical characteristics and regulatory approvals.

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

LP38691QSDX-ADJ/NOPB: Identical electrical specifications but lacks the enable pin functionality.

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

What is the minimum capacitance required for stability?

The device requires a minimum of 1 µF on both the input and output pins for stable operation.

How is the output voltage determined?

The output voltage is adjusted using two external resistors connected to the ADJ pin, calculated as VOUT = VADJ × (1 + R1/R2).