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LP38853MR-ADJ Linear Voltage Regulator Equivalent & Substitute Parts
Part Overview
The LP38853MR-ADJ is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This Power Management (PMIC) device delivers 3A output current with adjustable voltage regulation from 0.8V to 1.8V. The component is currently in Last Time Buy status, making identification of equivalent substitute parts essential for design continuity and procurement planning. The LP38853MR-ADJ operates across industrial temperature ranges (-40°C to 125°C) and includes integrated protection features for over-current, over-temperature, short-circuit, and under-voltage lockout conditions.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | LP38853MR-ADJ |
| Category | Power Management (PMIC) |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Number of Regulators | 1 |
| Current - Output | 3A |
| Voltage - Input (Max) | 5.5V |
| Voltage - Output (Min/Fixed) | 0.8V |
| Voltage - Output (Max) | 1.8V |
| Voltage Dropout (Max) | 0.45V @ 3A |
| Current - Quiescent (Iq) | 300 µA |
| PSRR | 80dB ~ 70dB (120Hz ~ 1kHz) |
| Package / Case | 8-PowerSOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 125°C |
| Control Features | Enable, Soft Start |
| Protection Features | Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO) |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 3 (168 Hours) |
Substitute Part Grouping Explanation
Substitute parts for the LP38853MR-ADJ are identified based on strict electrical and mechanical parameter matching. The primary substitution criteria are:
- Output Configuration & Type: Positive adjustable output matching 0.8V to 1.8V range
- Current Rating: 3A output current capability
- Package Compatibility: 8-PowerSOIC form factor with identical 3.90mm width
- Voltage Specifications: Maximum input voltage of 5.5V and dropout voltage of 0.45V @ 3A
- Protection & Control Features: Presence of Enable, Soft Start, Over Current, Over Temperature, Short Circuit, and UVLO protection
- Thermal & Compliance: Operating temperature range -40°C to 125°C, ROHS3 compliance, and MSL 3 rating
The LP38853MR-ADJ/NOPB variant meets all these criteria and qualifies as a direct substitute based on identical electrical specifications and package configuration.
Parameter Comparison
| Parameter | LP38853MR-ADJ | LP38853MR-ADJ/NOPB |
|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments |
| Output Configuration | Positive | Positive |
| Output Type | Adjustable | Adjustable |
| Current - Output | 3A | 3A |
| Voltage - Input (Max) | 5.5V | 5.5V |
| Voltage - Output (Min/Fixed) | 0.8V | 0.8V |
| Voltage - Output (Max) | 1.8V | 1.8V |
| Voltage Dropout (Max) | 0.45V @ 3A | 0.45V @ 3A |
| Current - Quiescent (Iq) | 300 µA | 300 µA |
| PSRR | 80dB ~ 70dB (120Hz ~ 1kHz) | 80dB ~ 70dB (120Hz ~ 1kHz) |
| Package / Case | 8-PowerSOIC (0.154", 3.90mm Width) | 8-PowerSOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount | Surface Mount |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Control Features | Enable, Soft Start | Enable, Soft Start |
| Protection Features | Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO) | Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO) |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| MSL Rating | 3 (168 Hours) | 3 (168 Hours) |
| Product Status | Last Time Buy | Active |
Engineering Selection Recommendations
The LP38853MR-ADJ/NOPB is a direct functional equivalent to the LP38853MR-ADJ. Both parts are manufactured by Texas Instruments and share identical electrical specifications, package configuration, and protection features. The primary distinction is product status: the original LP38853MR-ADJ is in Last Time Buy status, while the LP38853MR-ADJ/NOPB maintains Active status, ensuring continued availability and supply chain stability.
For new designs or long-term production requirements, the LP38853MR-ADJ/NOPB is the appropriate selection. Both parts maintain ROHS3 compliance and identical MSL ratings, supporting equivalent reliability and environmental standards. The packaging difference (standard versus tube) does not affect electrical performance or PCB integration.
Frequently Asked Questions (FAQ)
Q: Can LP38853MR-ADJ/NOPB be used as a direct replacement for LP38853MR-ADJ?
A: Yes. Both parts are electrically and mechanically identical. The LP38853MR-ADJ/NOPB is the recommended choice for new procurement due to its Active product status.
Q: What is the significance of the "/NOPB" suffix?
A: The "/NOPB" designation indicates the part is supplied in tube packaging rather than alternative packaging formats. This does not affect electrical performance or circuit functionality.
Q: Are there any thermal or reliability differences between these parts?
A: No. Both parts operate across -40°C to 125°C, maintain identical MSL 3 ratings, and include the same protection features (Over Current, Over Temperature, Short Circuit, UVLO).
Q: Can these parts be used interchangeably on the same PCB?
A: Yes. Both parts use the 8-PowerSOIC package with identical 3.90mm width and pin configuration, allowing direct PCB substitution without layout modifications.
Q: What compliance certifications apply to both parts?
A: Both LP38853MR-ADJ and LP38853MR-ADJ/NOPB are ROHS3 compliant and REACH unaffected, meeting equivalent environmental and regulatory standards.
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