L88MS05TL-TL-E Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The L88MS05TL-TL-E is a linear voltage regulator IC manufactured by onsemi, designed to deliver a fixed 5V output at 500mA. This device features a positive output configuration with integrated over-temperature and short-circuit protection. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The regulator operates across an input voltage range up to 17V with a maximum dropout voltage of 0.3V at 150mA, suitable for applications requiring stable 5V power delivery in space-constrained through-hole mounting configurations.

Substiute Parts

L88MS05TL-TL-E

onsemiIn Stock: 872L88MS05TL-TL-E Datasheet

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BA178M05CP-E2

Rohm SemiconductorIn Stock: 2279BA178M05CP-E2 Datasheet

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BA78M05CP-E2

Rohm SemiconductorIn Stock: 1870BA78M05CP-E2 Datasheet

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LM341T-5.0/NOPB

Texas InstrumentsIn Stock: 4057LM341T-5.0/NOPB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the L88MS05TL-TL-E is determined by the following critical parameters:

• Fixed 5V output voltage
• 500mA output current capability
• Positive output configuration
• Through-hole mounting
• ROHS3 compliance
• Operating temperature range compatibility

The three substitute parts listed below meet these core electrical specifications. However, they differ in package form factor and maximum input voltage ratings. The BA178M05CP-E2 and BA78M05CP-E2 are packaged in TO-220-3 cropped leads (larger footprint than the original TP-3H), while the LM341T-5.0/NOPB maintains TO-220-3 standard leads. All three accept higher maximum input voltages (25V or 35V) compared to the original 17V specification, providing greater design margin in applications with variable input sources.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts are active products with ROHS3 compliance, ensuring long-term availability and regulatory alignment. The LM341T-5.0/NOPB from Texas Instruments offers the widest operating temperature range (-40°C ~ 125°C) and highest maximum input voltage (35V), making it suitable for applications requiring extended thermal performance. The BA78M05CP-E2 provides comprehensive protection features including over-current, over-temperature, and short-circuit protection, matching the protection capability of the original part. The BA178M05CP-E2 offers slightly lower quiescent current (4.5mA) compared to the original specification.

Package form factor represents the primary design consideration: the original L88MS05TL-TL-E uses a compact TP-3H (TO-251-3 short leads) package, while all substitutes employ larger TO-220-3 variants. PCB layout modifications are required if space constraints are critical. The dropout voltage specification differs significantly; the original part specifies 0.3V at 150mA, while substitutes specify 2V at 500mA, which may impact applications with tight input-to-output voltage margins.

Frequently Asked Questions (FAQ)

Q: Can I directly replace the L88MS05TL-TL-E with any of these substitute parts without PCB modification?

A: Direct pin-compatible replacement is not possible due to package differences. The original uses TO-251-3 short leads (TP-3H), while all substitutes use TO-220-3 variants with different lead spacing and footprints. PCB layout redesign is required.

Q: What is the primary reason for substitution?

A: The L88MS05TL-TL-E is classified as obsolete. The three substitute parts are active products from established manufacturers, ensuring continued availability and supply chain stability.

Q: Are all substitute parts electrically compatible with the original?

A: All substitutes deliver the same fixed 5V output at 500mA and maintain positive output configuration. However, dropout voltage characteristics differ significantly. The original specifies 0.3V at 150mA, while substitutes specify 2V at 500mA. Applications with minimal input-to-output voltage headroom require careful evaluation.

Q: Which substitute offers the best protection features?

A: The LM341T-5.0/NOPB provides the most comprehensive protection with over-current, over-temperature, and short-circuit protection. The BA78M05CP-E2 includes over-current and over-temperature protection. The BA178M05CP-E2 does not list specific protection features.

Q: What is the impact of higher maximum input voltage ratings on my design?

A: Substitutes accept 25V or 35V maximum input compared to the original 17V specification. This provides greater design margin for applications with variable input sources but does not require design changes if your input voltage remains within the original 17V limit.

Q: Which substitute has the lowest quiescent current?

A: The LM341T-5.0/NOPB has the lowest quiescent current at 4mA, followed by the BA178M05CP-E2 at 4.5mA. The original part specifies 5mA.

Q: Can I use these substitutes in applications requiring extended temperature operation?

A: The LM341T-5.0/NOPB operates to 125°C, exceeding the original -20°C ~ 85°C range. The BA178M05CP-E2 and BA78M05CP-E2 operate to -40°C ~ 85°C, providing lower temperature extension but matching the upper temperature limit of the original.