AP1212LSL-U Equivalent & Substitute Parts

Part Overview

The AP1212LSL-U is a Power Management IC (PMIC) manufactured by Diodes Incorporated, functioning as a USB Switch with 1:2 output configuration. This N-Channel power switch operates at 500mA maximum output current and is housed in an 8-SOP package. The part is currently classified as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Substiute Parts

AP1212LSL-U

Diodes IncorporatedIn Stock: 789AP1212LSL-U Datasheet

Current PartRFQ

LM3526M-H/NOPB

Texas InstrumentsIn Stock: 16211LM3526M-H/NOPB Datasheet

MFR RecommendedRFQ

LM3526M-L/NOPB

Texas InstrumentsIn Stock: 26857LM3526M-L/NOPB Datasheet

MFR RecommendedRFQ

LM3526MX-L/NOPB

Texas InstrumentsIn Stock: 42993LM3526MX-L/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AP1212LSL-U is based on the following critical parameters that must remain consistent:

• Switch Configuration: 1:2 output ratio with high-side switching topology
• Electrical Performance: 500mA maximum output current capability
• Load Voltage Range: 2.7V ~ 5.5V operational window
• Package Compatibility: 8-SOIC form factor (0.154", 3.90mm width)
• Interface & Protection: On/Off control with current limiting, over-temperature, and UVLO fault protection
• Compliance: ROHS3 compliance and REACH unaffected status

The substitute parts (LM3526M-H/NOPB, LM3526M-L/NOPB, LM3526MX-L/NOPB) from Texas Instruments maintain functional equivalence through identical electrical specifications, package geometry, and protection features. The primary difference is the output channel type (P-Channel vs. N-Channel), which represents a functional alternative within the same application class while preserving all critical operating parameters.

Parameter Comparison

Engineering Selection Recommendations

All three LM3526 variants from Texas Instruments are active products with established supply chains, providing long-term availability compared to the obsolete AP1212LSL-U. Selection among the three substitutes depends on packaging and procurement requirements:

• LM3526M-H/NOPB: Supplied in Tube packaging; suitable for standard component procurement workflows
• LM3526M-L/NOPB: Supplied in Tube packaging; functionally identical to LM3526M-H/NOPB
• LM3526MX-L/NOPB: Supplied in Cut Tape (CT) & Digi-Reel® packaging; optimized for automated assembly and high-volume production

All three parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original AP1212LSL-U. The improved Rds On specification (100mOhm vs. 110mOhm) in the LM3526 series provides enhanced thermal performance and reduced power dissipation.

Frequently Asked Questions (FAQ)

Q: Can the LM3526 series directly replace the AP1212LSL-U in existing designs?

A: The LM3526 series maintains electrical and mechanical compatibility through identical load voltage range, output current rating, package geometry, and protection features. However, the output channel type differs (P-Channel vs. N-Channel), requiring circuit topology verification to confirm functional equivalence in your specific application.

Q: What is the significance of the different LM3526 part number suffixes (M-H, M-L, MX-L)?

A: The suffixes indicate packaging and temperature grade variations. M-H and M-L are supplied in Tube packaging, while MX-L uses Cut Tape & Digi-Reel® packaging. All three operate across the same -40°C ~ 125°C temperature range and are functionally equivalent.

Q: Does the improved Rds On specification (100mOhm vs. 110mOhm) affect circuit design?

A: The lower on-resistance in the LM3526 series reduces power dissipation and thermal generation compared to the AP1212LSL-U. This represents an improvement that does not require design modification but may allow for reduced thermal management requirements.

Q: Are all substitute parts available in the same 8-SOIC package?

A: Yes. All substitute parts use the 8-SOIC (0.154", 3.90mm Width) package, ensuring direct mechanical compatibility with existing PCB layouts designed for the AP1212LSL-U.

Q: What compliance certifications apply to the substitute parts?

A: All LM3526 variants maintain ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the original AP1212LSL-U.