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LP3856ES-ADJ Linear Voltage Regulator
Part Overview
The LP3856ES-ADJ is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This Surface Mount device delivers 3A output current in a TO-263 (DDPAK-5) package and supports adjustable output voltage from 1.23V to 6.5V. The part is classified as Obsolete, making identification of suitable alternatives essential for ongoing production and maintenance applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | LP3856ES-ADJ |
| Category | Power Management (PMIC) |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Current - Output | 3A |
| Voltage - Input (Max) | 7V |
| Voltage - Output (Min/Fixed) | 1.23V |
| Voltage - Output (Max) | 6.5V |
| Voltage Dropout (Max) | 0.6V @ 3A |
| Package / Case | TO-263-6, D2PAK (5 Leads + Tab) |
| Operating Temperature | -40°C ~ 125°C |
| Protection Features | Over Current, Over Temperature, Short Circuit |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution for the LP3856ES-ADJ is determined by strict equivalence across the following electrical and mechanical parameters:
- Output current rating: 3A
- Adjustable output voltage range: 1.23V to 6.5V
- Maximum input voltage: 7V
- Dropout voltage: 0.6V @ 3A
- Package type: TO-263 (DDPAK-5)
- Positive output configuration
- Protection features: Over Current, Over Temperature, Short Circuit
The LP3856ES-ADJ/NOPB variant meets all these criteria and qualifies as a direct substitute. The primary distinction is product status and compliance certification.
Parameter Comparison
| Parameter | LP3856ES-ADJ | LP3856ES-ADJ/NOPB |
|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments |
| Output Configuration | Positive | Positive |
| Output Type | Adjustable | Adjustable |
| Current - Output | 3A | 3A |
| Voltage - Input (Max) | 7V | 7V |
| Voltage - Output (Min/Fixed) | 1.23V | 1.23V |
| Voltage - Output (Max) | 6.5V | 6.5V |
| Voltage Dropout (Max) | 0.6V @ 3A | 0.6V @ 3A |
| Package / Case | TO-263-6, D2PAK (5 Leads + Tab) | TO-263-6, D2PAK (5 Leads + Tab) |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Protection Features | Over Current, Over Temperature, Short Circuit | Over Current, Over Temperature, Short Circuit |
| Product Status | Obsolete | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) | 3 (168 Hours) |
Engineering Selection Recommendations
The LP3856ES-ADJ/NOPB is the direct substitute for the LP3856ES-ADJ. Both parts are identical in electrical performance and mechanical form factor. The LP3856ES-ADJ/NOPB is currently Active in product status, whereas the original part is Obsolete. Additionally, the LP3856ES-ADJ/NOPB carries ROHS3 compliance certification, compared to the non-compliant status of the original part. For new designs and ongoing production requiring regulatory compliance, the LP3856ES-ADJ/NOPB is the appropriate selection.
Frequently Asked Questions (FAQ)
Q: Can LP3856ES-ADJ/NOPB be used as a direct replacement for LP3856ES-ADJ?
A: Yes. Both parts are electrically and mechanically identical across all specified parameters including output current (3A), adjustable voltage range (1.23V to 6.5V), dropout voltage (0.6V @ 3A), and TO-263 package configuration. Pin-for-pin compatibility is maintained.
Q: What is the difference between LP3856ES-ADJ and LP3856ES-ADJ/NOPB?
A: The primary differences are product status and compliance. LP3856ES-ADJ is Obsolete and RoHS non-compliant. LP3856ES-ADJ/NOPB is Active and ROHS3 compliant. Electrical and mechanical specifications are identical.
Q: Is the TO-263 package compatible with existing PCB layouts?
A: Yes. Both parts use the TO-263-6 (D2PAK with 5 Leads + Tab) package. PCB footprints and thermal management designs remain unchanged.
Q: What protection features are included in these regulators?
A: Both parts include Over Current, Over Temperature, and Short Circuit protection.
Q: Are there any moisture sensitivity considerations for storage?
A: Both parts have Moisture Sensitivity Level (MSL) 3 with a 168-hour floor life rating. Standard moisture control procedures during storage and handling are required.
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