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LP3875EMP-2.5 Equivalent & Substitute Parts
Part Overview
The LP3875EMP-2.5 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. This device delivers a fixed 2.5V output at 1.5A maximum current in a SOT-223-5 surface mount package. The main part number LP3875EMP-2.5 is currently listed as obsolete, making identification of active equivalent and substitute parts essential for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Category | Power Management (PMIC) |
| Output Configuration | Positive |
| Output Type | Fixed |
| Voltage - Output (Fixed) | 2.5V |
| Current - Output | 1.5A |
| Voltage - Input (Max) | 7V |
| Voltage Dropout (Max) | 0.55V @ 1.5A |
| Operating Temperature | -40°C ~ 125°C |
| Package / Case | TO-261-5, TO-261AB |
| Supplier Device Package | SOT-223-5 |
| Mounting Type | Surface Mount |
| Protection Features | Over Current, Over Temperature, Short Circuit |
| Control Features | Enable |
Substitute Part Grouping Explanation
Substitute parts for the LP3875EMP-2.5 are selected based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:
Critical Matching Parameters:
- Fixed output voltage: 2.5V
- Output current rating: 1.5A
- Maximum input voltage: 7V
- Package type: SOT-223-5 (TO-261-5, TO-261AB)
- Surface mount configuration
- Operating temperature range: -40°C ~ 125°C
- Protection features: Over Current, Over Temperature, Short Circuit
- Control features: Enable function
All identified substitute parts meet these core electrical and mechanical requirements. Variations in quiescent current (Iq), dropout voltage, and product status are noted but do not disqualify substitution eligibility when the primary functional parameters align.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Output (V) | Current (A) | Input Max (V) | Dropout @ 1.5A (V) | Iq (mA) | Package | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| LP3875EMP-2.5 | Texas Instruments | Obsolete | 2.5 | 1.5 | 7 | 0.55 | 5 | SOT-223-5 | Non-compliant |
| LP3852EMP-2.5/NOPB | Texas Instruments | Active | 2.5 | 1.5 | 7 | 0.44 | 3 | SOT-223-5 | ROHS3 Compliant |
| LP3855EMP-2.5/NOPB | Texas Instruments | Active | 2.5 | 1.5 | 7 | 0.44 | 3 | SOT-223-5 | ROHS3 Compliant |
| LP3872EMP-2.5/NOPB | National Semiconductor | Active | 2.5 | 1.5 | 7 | 0.55 | 5 | SOT-223 | Not specified |
| LP3872EMPX-2.5/NOPB | National Semiconductor | Active | 2.5 | 1.5 | 7 | 0.55 | 5 | SOT-223 | Not specified |
| LP3875EMP-2.5/NOPB | Texas Instruments | Active | 2.5 | 1.5 | 7 | 0.55 | 5 | SOT-223-5 | ROHS3 Compliant |
| LP3962EMP-2.5/NOPB | Texas Instruments | Active | 2.5 | 1.5 | 7 | 0.55 | 9 | SOT-223-5 | ROHS3 Compliant |
| LP3965EMP-2.5/NOPB | Texas Instruments | Active | 2.5 | 1.5 | 7 | 0.55 | 9 | SOT-223-5 | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Recommendation: LP3875EMP-2.5/NOPB
The LP3875EMP-2.5/NOPB is the direct active equivalent of the obsolete LP3875EMP-2.5. This part maintains identical electrical specifications and is available in the same SOT-223-5 package. It carries ROHS3 compliance certification and is currently in active production status with confirmed inventory availability. This part requires no design modifications and provides the most straightforward replacement path.
Secondary Recommendations: LP3852EMP-2.5/NOPB and LP3855EMP-2.5/NOPB
Both LP3852EMP-2.5/NOPB and LP3855EMP-2.5/NOPB are Texas Instruments alternatives with improved performance characteristics. These parts deliver lower dropout voltage (0.44V versus 0.55V) and reduced quiescent current (3mA versus 5mA), resulting in improved efficiency. Both are ROHS3 compliant and in active production. These substitutes are suitable for designs where lower power dissipation is beneficial.
Alternative Options: LP3872EMP-2.5/NOPB and LP3872EMPX-2.5/NOPB
The National Semiconductor LP3872 series parts maintain electrical equivalence with identical dropout voltage and quiescent current specifications. These parts are available in SOT-223 packaging and are in active production. Selection of these alternatives depends on supply chain availability and procurement preferences.
Higher Quiescent Current Options: LP3962EMP-2.5/NOPB and LP3965EMP-2.5/NOPB
The LP3962EMP-2.5/NOPB and LP3965EMP-2.5/NOPB are functionally equivalent but feature elevated quiescent current (9mA). These parts are suitable for applications where standby current is not a critical design constraint. Both are ROHS3 compliant and in active production.
Frequently Asked Questions (FAQ)
Q: Can I directly replace LP3875EMP-2.5 with LP3875EMP-2.5/NOPB?
A: Yes. LP3875EMP-2.5/NOPB is the active production equivalent of the obsolete LP3875EMP-2.5. Both parts share identical electrical specifications, package type (SOT-223-5), and functional characteristics. No design changes are required.
Q: What is the difference between LP3852EMP-2.5/NOPB and LP3875EMP-2.5/NOPB?
A: Both parts deliver 2.5V at 1.5A in SOT-223-5 packages. The LP3852EMP-2.5/NOPB features lower dropout voltage (0.44V versus 0.55V) and reduced quiescent current (3mA versus 5mA). These improvements reduce power dissipation but do not affect functional compatibility in most applications.
Q: Are the National Semiconductor LP3872 parts compatible with the Texas Instruments LP3875?
A: Yes. The LP3872EMP-2.5/NOPB and LP3872EMPX-2.5/NOPB maintain electrical equivalence with identical output voltage, current rating, and protection features. The primary difference is the package designation (SOT-223 versus SOT-223-5), which reflects minor physical variations that do not affect PCB layout compatibility for standard applications.
Q: Why do some substitute parts have higher quiescent current?
A: Quiescent current (Iq) represents the regulator's internal consumption when delivering no load current. The LP3962EMP-2.5/NOPB and LP3965EMP-2.5/NOPB feature 9mA quiescent current compared to 5mA in the original part. This difference does not affect functional substitution but increases standby power consumption. Selection depends on application power budget requirements.
Q: Are all substitute parts RoHS compliant?
A: The Texas Instruments parts (LP3852EMP-2.5/NOPB, LP3855EMP-2.5/NOPB, LP3875EMP-2.5/NOPB, LP3962EMP-2.5/NOPB, LP3965EMP-2.5/NOPB) are ROHS3 compliant. The National Semiconductor LP3872 series parts do not specify RoHS status in the provided data. Verify RoHS compliance requirements with your procurement or quality assurance department before final selection.
Q: What is the significance of the /NOPB suffix?
A: The /NOPB suffix indicates the part is supplied without plumbum (lead-free). This designation confirms RoHS compliance and environmental compliance with international regulations.
Q: Can I use LP3965EMP-2.5/NOPB in place of LP3875EMP-2.5?
A: Yes. LP3965EMP-2.5/NOPB is functionally equivalent with identical output voltage, current rating, and package type. The higher quiescent current (9mA versus 5mA) is the only performance difference. This substitution is valid for applications where standby current is not a limiting design factor.
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