LP38693MP-3.3/NOPB Equivalent & Substitute Parts

Part Overview

The LP38693MP-3.3/NOPB is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed 3.3V output at 500mA with a maximum input voltage of 10V and a dropout voltage of 0.55V at full load. The device is housed in a SOT-223-5 surface mount package and includes enable control and over-temperature protection features. The main part is currently in active production status with 45,978 units in stock. Substitute parts are identified based on matching electrical specifications and package compatibility, enabling design flexibility when the primary part becomes unavailable or when alternative packaging formats are required.

Key Parameters

Parameter	Value
Manufacturer Part Number	LP38693MP-3.3/NOPB
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Voltage (Fixed)	3.3V
Output Current	500mA
Input Voltage (Max)	10V
Dropout Voltage (Max)	0.55V @ 500mA
Package / Case	TO-261-5, TO-261AB
Supplier Device Package	SOT-223-5
Mounting Type	Surface Mount
Operating Temperature Range	-40°C ~ 125°C
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LP38693MP-3.3/NOPB are identified through parametric equivalence. All substitute candidates must match the following critical parameters:

Output voltage: 3.3V fixed
Output current capability: 500mA
Maximum input voltage: 10V
Dropout voltage: 0.55V @ 500mA
Package type: SOT-223-5 (TO-261-5, TO-261AB)
Surface mount configuration
Operating temperature range: -40°C ~ 125°C
Control features: Enable function
Protection: Over-temperature protection
Quiescent current: 55 µA
PSRR: 55dB (120Hz)

The LP38693MP-3.3 and LP38693MPX-3.3/NOPB meet all electrical and mechanical requirements for direct substitution. Differences in packaging format (Cut Tape & Digi-Reel® versus Tape & Reel) and product status do not affect functional compatibility in circuit applications.

Parameter Comparison

Parameter	LP38693MP-3.3/NOPB	LP38693MP-3.3	LP38693MPX-3.3/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Output Voltage	3.3V	3.3V	3.3V
Output Current	500mA	500mA	500mA
Input Voltage (Max)	10V	10V	10V
Dropout Voltage (Max)	0.55V @ 500mA	0.55V @ 500mA	0.55V @ 500mA
Quiescent Current	55 µA	55 µA	55 µA
PSRR	55dB (120Hz)	55dB (120Hz)	55dB (120Hz)
Package / Case	TO-261-5, TO-261AB	TO-261-5, TO-261AB	TO-261-5, TO-261AB
Supplier Device Package	SOT-223-5	SOT-223-5	SOT-223-5
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Control Features	Enable	Enable	Enable
Protection Features	Over Temperature	Over Temperature	Over Temperature
Product Status	Active	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®
Inventory Status	45,978 Pcs New Original In Stock	1,994 Pcs New Original In Stock	4,010 Pcs New Original In Stock

Engineering Selection Recommendations

The LP38693MP-3.3/NOPB is the primary selection for new designs due to its active product status and high inventory availability. Both substitute parts—LP38693MP-3.3 and LP38693MPX-3.3/NOPB—are electrically and mechanically equivalent and provide functional interchangeability.

LP38693MP-3.3 carries an obsolete product status, which may present long-term supply constraints. This part is suitable only for legacy system maintenance or when existing inventory is available through secondary channels.

LP38693MPX-3.3/NOPB maintains active product status with adequate inventory levels and is the recommended alternative when the primary part is unavailable. Both the primary part and this substitute are available in Cut Tape & Digi-Reel® packaging, ensuring consistent handling and assembly compatibility.

All three parts comply with ROHS3 and REACH requirements, supporting environmental and regulatory compliance objectives.

Frequently Asked Questions (FAQ)

Q: Can LP38693MP-3.3 be used as a direct replacement for LP38693MP-3.3/NOPB?

A: Yes. Both parts are parametrically equivalent across all electrical specifications and package dimensions. The primary difference is product status (obsolete versus active) and packaging format (Tape & Reel versus Cut Tape & Digi-Reel®). Functional performance in circuit applications is identical.

Q: What is the difference between LP38693MPX-3.3/NOPB and LP38693MP-3.3/NOPB?

A: The parts are electrically identical with matching output voltage, current rating, dropout voltage, and all control features. Both are available in SOT-223-5 packaging and maintain active product status. The suffix variation (MPX versus MP) does not affect circuit compatibility or performance characteristics.

Q: Are there packaging compatibility concerns when substituting these parts?

A: No. All three parts use the SOT-223-5 package (TO-261-5, TO-261AB case designation) with identical pin configurations and mechanical dimensions. Surface mount assembly processes and PCB layouts require no modification.

Q: Which substitute part should be selected for new production designs?

A: LP38693MPX-3.3/NOPB is the recommended substitute when LP38693MP-3.3/NOPB is unavailable. It maintains active product status, adequate inventory, and identical electrical performance. LP38693MP-3.3 should be avoided for new designs due to obsolete status.

Q: Do these parts require different thermal management or PCB layout considerations?

A: No. All three parts have identical thermal characteristics, dropout voltage performance, and quiescent current specifications. PCB layout, thermal vias, and heat dissipation strategies remain unchanged across substitutions.

Q: Are compliance certifications consistent across all three parts?

A: Yes. All parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

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