LP38692SDX-3.3 Linear Voltage Regulator IC Equivalent & Substitute Parts

Part Overview

The LP38692SDX-3.3 is a linear voltage regulator IC manufactured by Texas Instruments, designed to deliver a fixed 3.3V output at 1A maximum current in a 6-WSON (3x3) surface mount package. This part is classified as obsolete, which necessitates identification of active equivalent alternatives for new designs and production continuity. The substitute parts listed maintain identical electrical specifications and mechanical compatibility while offering active product status and improved availability.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3.3V
Output Current	1A
Input Voltage (Max)	10V
Voltage Dropout (Max)	1V @ 1A
Quiescent Current	55 µA
PSRR	55dB (120Hz)
Operating Temperature Range	-40°C to 125°C
Package Type	6-WDFN Exposed Pad / 6-WSON (3x3)
Mounting Type	Surface Mount
Protection Features	Over Temperature

Substitute Part Grouping Explanation

Substitution eligibility for the LP38692SDX-3.3 is determined by strict equivalence across the following critical parameters:

Fixed output voltage of 3.3V
Output current rating of 1A
Maximum input voltage of 10V
Voltage dropout specification of 1V @ 1A
Quiescent current of 55 µA
PSRR of 55dB (120Hz)
Operating temperature range of -40°C to 125°C
6-WDFN Exposed Pad package with 6-WSON (3x3) footprint
Surface mount configuration

All substitute parts listed maintain these specifications without deviation. Substitution is valid across different packaging formats (Cut Tape, Digi-Reel, Tape & Reel) and between LP38690 and LP38692 base product numbers, as both series deliver identical electrical performance in this voltage and current configuration.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage	Quiescent Current	PSRR	Operating Temp	Package	Product Status	RoHS Status	Inventory
LP38692SDX-3.3	Texas Instruments	3.3V	1A	10V	1V @ 1A	55 µA	55dB (120Hz)	-40°C to 125°C	6-WSON (3x3)	Obsolete	RoHS Non-Compliant	1079 Pcs
LP38690SD-3.3/NOPB	Texas Instruments	3.3V	1A	10V	1V @ 1A	55 µA	55dB (120Hz)	-40°C to 125°C	6-WSON (3x3)	Active	RoHS3 Compliant	63200 Pcs
LP38690SDX-3.3/NOPB	Texas Instruments	3.3V	1A	10V	1V @ 1A	55 µA	55dB (120Hz)	-40°C to 125°C	6-WSON (3x3)	Active	RoHS3 Compliant	63300 Pcs
LP38692SD-3.3/NOPB	Texas Instruments	3.3V	1A	10V	1V @ 1A	55 µA	55dB (120Hz)	-40°C to 125°C	6-WSON (3x3)	Active	RoHS3 Compliant	26200 Pcs
LP38692SDX-3.3/NOPB	Texas Instruments	3.3V	1A	10V	1V @ 1A	55 µA	55dB (120Hz)	-40°C to 125°C	6-WSON (3x3)	Active	RoHS3 Compliant	991 Pcs

Engineering Selection Recommendations

All substitute parts are direct functional equivalents with identical electrical and mechanical specifications. Selection should prioritize active product status and compliance certifications:

LP38690SD-3.3/NOPB and LP38690SDX-3.3/NOPB are recommended as primary substitutes, offering the highest inventory availability (63200 and 63300 units respectively) and RoHS3 compliance. Both are active products with unlimited moisture sensitivity level (MSL 1).

LP38692SD-3.3/NOPB and LP38692SDX-3.3/NOPB are secondary alternatives, maintaining identical specifications with active product status and RoHS3 compliance. LP38692SD-3.3/NOPB provides 26200 units in stock, while LP38692SDX-3.3/NOPB offers 991 units in Tape & Reel packaging.

All substitute parts carry REACH Unaffected status and EAR99 ECCN classification, matching the original part's regulatory profile.

Frequently Asked Questions (FAQ)

Q: Can LP38690 series parts directly replace LP38692 series parts?

A: Yes. Both LP38690 and LP38692 base product numbers deliver identical electrical performance in this 3.3V, 1A configuration. All parameters including output voltage, current rating, dropout voltage, quiescent current, and PSRR are equivalent across both series.

Q: What is the difference between Cut Tape (CT) & Digi-Reel and Tape & Reel (TR) packaging?

A: Both are surface mount packaging formats suitable for automated assembly. Cut Tape & Digi-Reel is supplied in smaller quantities on cut tape with reel options, while Tape & Reel is supplied in full reel quantities. The electrical and mechanical specifications remain identical.

Q: Why is the original LP38692SDX-3.3 marked as obsolete?

A: Product obsolescence indicates Texas Instruments has discontinued active production and support. Active equivalent alternatives are available with identical specifications and improved long-term availability.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed are RoHS3 compliant. The original LP38692SDX-3.3 is RoHS non-compliant. For applications requiring RoHS compliance, any of the substitute parts are suitable.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes. All parts share the identical 6-WDFN Exposed Pad package with 6-WSON (3x3) footprint and surface mount configuration. No PCB layout modifications are required for substitution.

Q: What is the NOPB designation in part numbers?

A: NOPB indicates "No Plumbum" (lead-free) construction, confirming RoHS compliance and the absence of lead in the component.

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