LP38692MPX-1.8 Equivalent & Substitute Parts

Part Overview

The LP38692MPX-1.8 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed positive 1.8V output at 1A maximum current in a SOT-223-5 surface mount package. The main part is currently listed as obsolete, making identification of active equivalent and substitute parts essential for ongoing design support and procurement.

Key Parameters

Parameter	Value
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Min/Fixed)	1.8V
Voltage - Input (Max)	10V
Current - Output	1A
Voltage Dropout (Max)	1.6V @ 1A
Current - Quiescent (Iq)	55 µA
PSRR	55dB (120Hz)
Operating Temperature	-40°C ~ 125°C
Package / Case	TO-261-5, TO-261AB
Mounting Type	Surface Mount
Protection Features	Over Temperature

Substitute Part Grouping Explanation

Substitution for the LP38692MPX-1.8 is determined by strict equivalence across the following electrical and mechanical parameters:

Output voltage: 1.8V fixed
Maximum output current: 1A
Maximum input voltage: 10V
Dropout voltage: 1.6V @ 1A
Quiescent current: 55 µA
PSRR: 55dB (120Hz)
Operating temperature range: -40°C ~ 125°C
Package type: SOT-223 or SOT-223-5 surface mount
Protection: Over temperature protection

The identified substitute parts maintain identical electrical specifications and compatible package configurations, enabling direct functional replacement in applications requiring 1.8V linear regulation at 1A output.

Parameter Comparison

Parameter	LP38692MPX-1.8	LP38692MP-1.8/NOPB	LP38692MPX-1.8/NOPB
Manufacturer	Texas Instruments	National Semiconductor	Texas Instruments
Product Status	Obsolete	Active	Active
Output Configuration	Positive	Positive	Positive
Output Type	Fixed	Fixed	Fixed
Voltage - Output (Min/Fixed)	1.8V	1.8V	1.8V
Voltage - Input (Max)	10V	10V	10V
Current - Output	1A	1A	1A
Voltage Dropout (Max)	1.6V @ 1A	1.6V @ 1A	1.6V @ 1A
Current - Quiescent (Iq)	55 µA	55 µA	55 µA
Current - Supply (Max)	100 µA	100 µA	100 µA
PSRR	55dB (120Hz)	55dB (120Hz)	55dB (120Hz)
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	TO-261-5, TO-261AB	TO-261-5, TO-261AB	TO-261-5, TO-261AB
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Protection Features	Over Temperature	Over Temperature	Over Temperature
Supplier Device Package	SOT-223-5	SOT-223	SOT-223-5
RoHS Status	RoHS non-compliant	Not specified	ROHS3 Compliant
Packaging	Bulk	Bulk	Tape & Reel (TR)

Engineering Selection Recommendations

Both LP38692MP-1.8/NOPB and LP38692MPX-1.8/NOPB are active product alternatives to the obsolete LP38692MPX-1.8. Selection between these substitutes should be based on the following criteria:

LP38692MPX-1.8/NOPB (Texas Instruments): This part maintains the original manufacturer source and is ROHS3 compliant. It is supplied in Tape & Reel packaging, suitable for high-volume automated assembly. This option is recommended for new designs and production environments requiring RoHS compliance certification.

LP38692MP-1.8/NOPB (National Semiconductor): This part provides functional equivalence with identical electrical specifications. It is supplied in bulk packaging and represents an alternative source option. RoHS compliance status is not specified for this variant.

Both parts are electrically and mechanically interchangeable with the original LP38692MPX-1.8 based on the provided parameters.

Frequently Asked Questions (FAQ)

Q: Can LP38692MP-1.8/NOPB and LP38692MPX-1.8/NOPB be used interchangeably with the original LP38692MPX-1.8?

A: Yes. Both substitute parts maintain identical electrical specifications including output voltage (1.8V), output current (1A), dropout voltage (1.6V @ 1A), quiescent current (55 µA), and operating temperature range (-40°C ~ 125°C). Package configurations are compatible with SOT-223 surface mount assembly.

Q: What is the difference between SOT-223 and SOT-223-5 packaging?

A: Both designations refer to the same 5-pin surface mount package type used for this linear regulator. The specifications provided confirm compatibility across both package designations for all listed parts.

Q: Why is the original LP38692MPX-1.8 listed as obsolete?

A: Product obsolescence is determined by the manufacturer. Active alternatives with identical electrical and mechanical specifications are available through the substitute parts listed.

Q: Does packaging type (Bulk vs. Tape & Reel) affect electrical performance?

A: No. Packaging type affects only procurement and assembly logistics. Electrical performance and specifications remain identical regardless of packaging format.

Q: Are there compliance differences between the substitute parts?

A: LP38692MPX-1.8/NOPB is ROHS3 compliant. RoHS compliance status for LP38692MP-1.8/NOPB is not specified in the provided data. Both parts are REACH unaffected and classified under ECCN EAR99.

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