LP38841S-0.8 Linear Voltage Regulator - Equivalent & Substitute Parts

Part Overview

The LP38841S-0.8 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. This device delivers 800mA output current at a fixed 0.8V output voltage in a TO-263 (DDPAK-5) surface mount package. The regulator includes integrated protection features for over-current, over-temperature, and short-circuit conditions, with an enable control feature for power management applications.

The main part number LP38841S-0.8 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access components with active manufacturing status and current compliance certifications.

Key Parameters

Parameter	Value
Output Configuration	Positive
Output Type	Fixed
Number of Regulators	1
Voltage - Input (Max)	5.5V
Voltage - Output (Min/Fixed)	0.8V
Voltage Dropout (Max)	0.21V @ 800mA
Current - Output	800mA
Current - Quiescent (Iq)	30 µA
PSRR	80dB ~ 65dB (120Hz ~ 1kHz)
Control Features	Enable
Protection Features	Over Current, Over Temperature, Short Circuit
Operating Temperature	-40°C ~ 125°C
Package / Case	TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution for the LP38841S-0.8 is determined by strict equivalence across the following critical parameters:

Output voltage specification: Fixed 0.8V
Output current capability: 800mA minimum
Maximum input voltage: 5.5V
Package type: TO-263 (DDPAK-5) surface mount
Control and protection features: Enable function with over-current, over-temperature, and short-circuit protection
Operating temperature range: -40°C to 125°C
Dropout voltage performance: 0.21V @ 800mA

The substitute part LP38841S-0.8/NOPB maintains identical electrical specifications and mechanical compatibility while offering improved product status and compliance certifications.

Parameter Comparison

Parameter	LP38841S-0.8	LP38841S-0.8/NOPB
Manufacturer	Texas Instruments	Texas Instruments
Output Configuration	Positive	Positive
Output Type	Fixed	Fixed
Voltage - Output (Min/Fixed)	0.8V	0.8V
Voltage - Input (Max)	5.5V	5.5V
Voltage Dropout (Max)	0.21V @ 800mA	0.21V @ 800mA
Current - Output	800mA	800mA
Current - Quiescent (Iq)	30 µA	30 µA
PSRR	80dB ~ 65dB (120Hz ~ 1kHz)	80dB ~ 65dB (120Hz ~ 1kHz)
Control Features	Enable	Enable
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	TO-263-6, D2PAK (5 Leads + Tab), TO-263BA	TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
Mounting Type	Surface Mount	Surface Mount
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Packaging	Not specified	Tube

Engineering Selection Recommendations

The LP38841S-0.8/NOPB is the direct equivalent substitute for the obsolete LP38841S-0.8. Both parts share identical electrical performance specifications and mechanical compatibility. The primary distinction is product lifecycle status and regulatory compliance.

The LP38841S-0.8/NOPB carries active product status from Texas Instruments, ensuring ongoing availability and manufacturing support. This part meets ROHS3 compliance requirements, whereas the original LP38841S-0.8 is RoHS non-compliant. For applications requiring current regulatory compliance certifications, the LP38841S-0.8/NOPB is the appropriate selection.

Both parts maintain equivalent REACH and ECCN classifications. The MSL rating of 3 (168 Hours) applies to both variants, requiring identical moisture handling procedures during storage and assembly.

Frequently Asked Questions (FAQ)

Q: Can LP38841S-0.8/NOPB be used as a direct replacement for LP38841S-0.8?

A: Yes. The LP38841S-0.8/NOPB is electrically and mechanically identical to the LP38841S-0.8. All output voltage, current, dropout voltage, and protection specifications are equivalent. The parts are pin-compatible in TO-263 (DDPAK-5) packages and require no circuit modifications.

Q: What is the difference between LP38841S-0.8 and LP38841S-0.8/NOPB?

A: The primary differences are product status and compliance certification. LP38841S-0.8 is obsolete and RoHS non-compliant. LP38841S-0.8/NOPB is active and ROHS3 compliant. The "/NOPB" suffix indicates lead-free, halogen-free packaging. Electrical specifications and performance are identical.

Q: Are there any package compatibility considerations?

A: Both parts use the TO-263 (DDPAK-5) surface mount package with identical pinout and mechanical dimensions. No PCB layout modifications are required for substitution. Moisture sensitivity level (MSL 3) handling requirements are the same for both parts.

Q: Why is the original LP38841S-0.8 marked as obsolete?

A: Product obsolescence reflects Texas Instruments' lifecycle management. The LP38841S-0.8/NOPB represents the current active equivalent, offering improved compliance status and ongoing manufacturing support.

Q: What are the critical parameters for substitution compatibility?

A: Substitution compatibility is determined by fixed output voltage (0.8V), output current (800mA), maximum input voltage (5.5V), dropout voltage (0.21V @ 800mA), package type (TO-263), and protection features (over-current, over-temperature, short-circuit). All these parameters are identical between the two parts.

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