LP8345CLD-ADJ/NOPB Equivalent & Substitute Parts

Part Overview

The LP8345CLD-ADJ/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This Surface Mount device delivers 500mA output current in a compact 6-WSON package and is classified as Obsolete. Due to its obsolete status, identifying functionally equivalent active alternatives is essential for design continuity and procurement reliability.

Substiute Parts

LP8345CLD-ADJ/NOPB

Texas InstrumentsIn Stock: 2186LP8345CLD-ADJ/NOPB Datasheet

Current PartRFQ

BD00KA5WFP-E2

Rohm SemiconductorIn Stock: 31498BD00KA5WFP-E2 Datasheet

MFR RecommendedRFQ

LD39050PUR

STMicroelectronicsIn Stock: 79158LD39050PUR Datasheet

MFR RecommendedRFQ

ST1L05BPUR

STMicroelectronicsIn Stock: 15573ST1L05BPUR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LP8345CLD-ADJ/NOPB is determined by the following critical parameters:

• Output Configuration: Positive adjustable topology
• Current - Output: 500mA minimum capability
• Voltage - Input (Max): Support for input voltages up to 10V
• Voltage - Output (Min/Fixed): Adjustable output starting at or below 1.21V
• Voltage - Output (Max): Adjustable output reaching at least 1.29V
• Protection Features: Over Current and Over Temperature protection
• RoHS Status: ROHS3 Compliant
• Mounting Type: Surface Mount

The three substitute parts listed below meet these core electrical and compliance requirements while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts are ROHS3 Compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, matching the compliance profile of the LP8345CLD-ADJ/NOPB.

BD00KA5WFP-E2 (Rohm Semiconductor): Active product with 500mA output current matching the original specification. Input voltage maximum of 5.5V is lower than the original 10V specification. Package format is TO-252-5 (DPAK), differing from the original 6-WDFN. Quiescent current is elevated at 550 µA compared to 50 µA in the original.

LD39050PUR (STMicroelectronics): Active product with 500mA output current and 6-VDFN package footprint compatible with the original 6-WDFN form factor. Input voltage maximum of 5.5V is lower than the original 10V specification. Quiescent current of 50 µA matches the original. Includes additional Short Circuit protection feature. Operating temperature range extends to -40°C, exceeding the original 0°C minimum.

ST1L05BPUR (STMicroelectronics): Active product with enhanced 1.3A output current capability, exceeding the original 500mA specification. Input voltage maximum of 7V remains below the original 10V specification. 6-VDFN package footprint is compatible with the original 6-WDFN form factor. Quiescent current is elevated at 650 µA. Operating temperature range matches the original 0°C ~ 125°C specification.

Frequently Asked Questions (FAQ)

Q: Can BD00KA5WFP-E2 be used as a direct replacement for LP8345CLD-ADJ/NOPB?

A: BD00KA5WFP-E2 meets the core electrical requirements for positive adjustable output at 500mA with matching protection features and compliance certifications. However, the TO-252-5 package differs from the original 6-WDFN, requiring PCB layout modification. The reduced input voltage maximum of 5.5V versus 10V must be verified against your application's input supply specifications.

Q: What are the package compatibility considerations?

A: The LP8345CLD-ADJ/NOPB uses a 6-WDFN Exposed Pad package. LD39050PUR and ST1L05BPUR both use 6-VDFN Exposed Pad packages, which have similar footprints and may allow direct PCB substitution with minimal layout changes. BD00KA5WFP-E2 uses TO-252-5 (DPAK) format, which requires significant PCB redesign.

Q: How do quiescent current differences affect circuit design?

A: The original LP8345CLD-ADJ/NOPB and LD39050PUR both specify 50 µA quiescent current. BD00KA5WFP-E2 and ST1L05BPUR have elevated quiescent currents of 550 µA and 650 µA respectively. In low-power applications, this difference may impact standby power consumption and thermal performance.

Q: Are all substitutes suitable for the full input voltage range of the original?

A: No. The original LP8345CLD-ADJ/NOPB supports input voltages up to 10V. All three substitutes have lower maximum input voltage ratings: BD00KA5WFP-E2 and LD39050PUR at 5.5V, and ST1L05BPUR at 7V. Application input voltage specifications must not exceed these limits.

Q: Which substitute offers the best PSRR performance?

A: ST1L05BPUR provides the highest PSRR at 72dB (120Hz), followed by LD39050PUR at 65dB ~ 62dB (1kHz ~ 10kHz). The original LP8345CLD-ADJ/NOPB specifies 55dB (120Hz), and BD00KA5WFP-E2 specifies 50dB (120Hz).

Q: Does LD39050PUR offer additional protection features?

A: Yes. LD39050PUR includes Short Circuit protection in addition to Over Current and Over Temperature protection, providing enhanced circuit protection compared to the original LP8345CLD-ADJ/NOPB and other substitutes.