LP8345CDTX-5.0/NOPB Equivalent & Substitute Parts

Part Overview

The LP8345CDTX-5.0/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive fixed 5V output applications with 500mA current capacity in a TO-252-3 surface mount package. This device is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support, production continuity, and component sourcing.

Substiute Parts

LP8345CDTX-5.0/NOPB

Texas InstrumentsIn Stock: 1607LP8345CDTX-5.0/NOPB Datasheet

Current PartRFQ

MIC5237-5.0YU

Microchip TechnologyIn Stock: 12202MIC5237-5.0YU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LP8345CDTX-5.0/NOPB is determined by the following critical parameters:

• Fixed output voltage of 5V
• Positive output configuration
• Minimum 500mA output current capability
• Surface mount packaging (TO-252-3 or compatible footprint)
• Linear regulator topology
• Over current and over temperature protection
• ROHS3 compliance

The MIC5237-5.0YU from Microchip Technology meets these substitution criteria. Both devices deliver fixed 5V positive output with 500mA current capacity and include integrated protection features. While the MIC5237-5.0YU operates in a TO-263-3 package (physically different from TO-252-3), the electrical specifications and functional performance align with the LP8345CDTX-5.0/NOPB requirements for equivalent circuit operation.

Parameter Comparison

Engineering Selection Recommendations

The MIC5237-5.0YU is an active product from Microchip Technology and represents the primary substitute for the obsolete LP8345CDTX-5.0/NOPB. Both devices are ROHS3 compliant and suitable for equivalent circuit applications.

Key considerations for selection:

The MIC5237-5.0YU provides higher maximum input voltage (16V versus 10V), enabling operation in applications with wider input supply ranges. The substitute device includes reverse polarity protection, an additional safeguard not present in the original part. The MIC5237-5.0YU operates across an extended temperature range (-40°C to 125°C) compared to the LP8345CDTX-5.0/NOPB (0°C to 125°C), supporting deployment in broader environmental conditions.

Package footprint differences exist between the TO-252-3 (DPAK) and TO-263-3 (D2PAK) formats. PCB layout modifications are required to accommodate the substitute part. The MIC5237-5.0YU demonstrates superior power supply rejection ratio (75dB versus 55dB at 120Hz), providing enhanced noise filtering performance.

Frequently Asked Questions (FAQ)

Q: Can the MIC5237-5.0YU directly replace the LP8345CDTX-5.0/NOPB without PCB modifications?

A: No. The MIC5237-5.0YU uses a TO-263-3 (D2PAK) package while the LP8345CDTX-5.0/NOPB uses TO-252-3 (DPAK). These packages have different footprints and pin configurations. PCB layout redesign is necessary to accommodate the substitute part.

Q: What are the electrical compatibility differences between these two regulators?

A: Both devices deliver fixed 5V positive output at 500mA. The MIC5237-5.0YU accepts higher input voltage (16V maximum versus 10V) and includes reverse polarity protection. Dropout voltage differs slightly (0.7V versus 0.4V at 500mA). The MIC5237-5.0YU provides superior PSRR performance (75dB versus 55dB).

Q: Is the MIC5237-5.0YU suitable for applications requiring the original 0°C to 125°C operating temperature range?

A: Yes. The MIC5237-5.0YU operates from -40°C to 125°C, which encompasses the original temperature range. Applications limited to 0°C to 125°C operation are fully supported.

Q: Are both devices RoHS compliant?

A: Yes. Both the LP8345CDTX-5.0/NOPB and MIC5237-5.0YU are ROHS3 compliant.

Q: What is the moisture sensitivity level difference between these parts?

A: The LP8345CDTX-5.0/NOPB has MSL 1 (unlimited shelf life). The MIC5237-5.0YU has MSL 3 (168 hours). This affects storage and handling requirements for the substitute part.