LP8340CLD-ADJ/NOPB Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP8340CLD-ADJ/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This Surface Mount device delivers 1A output current in a compact 6-WSON package and includes integrated over-current and over-temperature protection. The part is currently listed as obsolete, making equivalent substitutes necessary for ongoing design support and production continuity. Substitute parts must maintain compatibility across output configuration, adjustability, current rating, and thermal protection features while accommodating different package formats and electrical specifications.

Substiute Parts

LP8340CLD-ADJ/NOPB

Texas InstrumentsIn Stock: 927LP8340CLD-ADJ/NOPB Datasheet

Current PartRFQ

BA00BC0WFP-E2

Rohm SemiconductorIn Stock: 44158BA00BC0WFP-E2 Datasheet

MFR RecommendedRFQ

LD39100PUR

STMicroelectronicsIn Stock: 37984LD39100PUR Datasheet

MFR RecommendedRFQ

LT1965EMS8E#PBF

Analog Devices Inc.In Stock: 5136LT1965EMS8E#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LP8340CLD-ADJ/NOPB is determined by the following mandatory parameters:

• Output Configuration: Positive (all candidates match)
• Output Type: Adjustable (all candidates match)
• Number of Regulators: 1 (all candidates match)
• Current - Output: 1A or greater (all candidates meet or exceed)
• Protection Features: Over Current and Over Temperature minimum (all candidates include)
• Mounting Type: Surface Mount (all candidates match)
• RoHS Status: ROHS3 Compliant (all candidates match)

The three substitute parts listed below satisfy these core substitution criteria. Variations in input voltage range, output voltage range, quiescent current, package format, and control features are secondary considerations that depend on specific application requirements and PCB layout constraints.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts are active products with ROHS3 compliance and REACH unaffected status, providing regulatory continuity for the obsolete LP8340CLD-ADJ/NOPB.

BA00BC0WFP-E2 (Rohm Semiconductor): This part offers the closest functional match with identical 1A output current and 55dB PSRR at 120Hz. The TO-252-5 package is larger than the original 6-WSON but provides superior thermal dissipation and easier hand-soldering capability. Input voltage range extends to 16V, accommodating higher supply voltages. Quiescent current is higher at 0.5 mA. Operating temperature range is -40°C to 105°C, which is narrower at the upper limit compared to the original specification.

LD39100PUR (STMicroelectronics): This part features the lowest quiescent current at 50 µA and includes additional short-circuit protection. The 6-VDFN package maintains similar footprint to the original 6-WSON. However, maximum input voltage is limited to 5.5V and maximum output voltage is constrained to 4.6V, making this option suitable only for lower-voltage applications. Operating temperature range extends to -40°C to 125°C, matching the original upper limit.

LT1965EMS8E#PBF (Analog Devices Inc.): This part delivers the highest output current at 1.1A and widest input voltage range to 20V. The 8-MSOP package is larger than the original 6-WSON. PSRR performance is superior at 75dB. Quiescent current is elevated at 1.1 mA. Operating temperature range is -40°C to 125°C. This option provides the most flexible electrical specifications for demanding applications.

Frequently Asked Questions (FAQ)

Q: Can I directly replace the LP8340CLD-ADJ/NOPB with any of these substitutes without PCB modification?

A: Package differences require PCB layout changes. The original uses 6-WSON, while substitutes use TO-252-5 (BA00BC0WFP-E2), 6-VDFN (LD39100PUR), or 8-MSOP (LT1965EMS8E#PBF). Footprint redesign is necessary for each option.

Q: Which substitute is best for low-power applications?

A: The LD39100PUR offers the lowest quiescent current at 50 µA, making it optimal for battery-powered or low-standby-current designs. The LP8340CLD-ADJ/NOPB at 100 µA and LT1965EMS8E#PBF at 1.1 mA are less suitable for ultra-low-power applications.

Q: What are the voltage range limitations for each substitute?

A: The LP8340CLD-ADJ/NOPB accepts input up to 10V and outputs 1.25V to 9.3V. BA00BC0WFP-E2 extends input to 16V and output to 12V. LD39100PUR is limited to 5.5V input and 4.6V output maximum. LT1965EMS8E#PBF supports the widest range with 20V input and 19.5V output maximum.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All three substitute parts—BA00BC0WFP-E2, LD39100PUR, and LT1965EMS8E#PBF—are ROHS3 compliant with REACH unaffected status, maintaining regulatory alignment with the original LP8340CLD-ADJ/NOPB.

Q: Which substitute has the best noise performance?

A: The LT1965EMS8E#PBF provides the highest PSRR at 75dB (120Hz). The LD39100PUR offers 70dB to 65dB across 1kHz to 10kHz. Both BA00BC0WFP-E2 and the original LP8340CLD-ADJ/NOPB specify 55dB at 120Hz.

Q: Do all substitutes include the same protection features?

A: All three substitutes include over-current and over-temperature protection. LD39100PUR adds short-circuit protection. LT1965EMS8E#PBF adds reverse-polarity protection. The original LP8340CLD-ADJ/NOPB includes only over-current and over-temperature protection.