S-T111B33MC-OGSTFG Linear Voltage Regulator 3.3V 150mA Equivalent & Substitute Parts

Part Overview

The S-T111B33MC-OGSTFG is a linear voltage regulator IC from ABLIC Inc. designed for positive fixed 3.3V output at 150mA in a SOT-23-5 surface mount package. This part is classified as Not For New Designs, making equivalent substitute parts necessary for ongoing production and new design implementations. The device provides regulated 3.3V output with integrated enable control and over-current protection across an operating temperature range of -40°C to 85°C.

Substiute Parts

S-T111B33MC-OGSTFG

ABLIC Inc.In Stock: 50319S-T111B33MC-OGSTFG Datasheet

Current PartRFQ

S-1112B33MC-L6STFU

ABLIC Inc.In Stock: 2692S-1112B33MC-L6STFU Datasheet

Parametric EquivalentRFQ

S-1122B33MC-L8STFU

ABLIC Inc.In Stock: 791S-1122B33MC-L8STFU Datasheet

Parametric EquivalentRFQ

S-1167A33-M5T1U

ABLIC Inc.In Stock: 976S-1167A33-M5T1U Datasheet

Parametric EquivalentRFQ

S-1167B33-M5T1U

ABLIC Inc.In Stock: 4429S-1167B33-M5T1U Datasheet

Parametric EquivalentRFQ

S-T111B33MC-OGSTFU

ABLIC Inc.In Stock: 1091S-T111B33MC-OGSTFU Datasheet

Parametric EquivalentRFQ

XC6504A331MR-G

Torex Semiconductor LtdIn Stock: 1343XC6504A331MR-G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the S-T111B33MC-OGSTFG is determined by the following critical parameters:

• Output voltage fixed at 3.3V
• Output current capability of 150mA
• Maximum input voltage of 6.5V or higher
• SOT-23-5 package compatibility
• Enable control feature
• Over-current protection
• Operating temperature range -40°C to 85°C
• Surface mount mounting type

Substitute parts are grouped into two categories based on these criteria:

Category 1: Direct ABLIC Series Equivalents — Parts from ABLIC Inc. with identical electrical specifications and Active product status, offering direct replacement capability with improved or equivalent performance characteristics.

Category 2: Cross-Manufacturer Equivalent — The Torex Semiconductor XC6504A331MR-G meets core electrical requirements but operates with different electrical characteristics (higher dropout voltage, different quiescent current) and uses SOT-25 packaging, requiring board-level evaluation.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (ABLIC Inc., Active Status):

The S-1167B33-M5T1U and S-1167A33-M5T1U from the S-1167 series are recommended as primary substitutes. Both parts maintain Active product status, meet all core electrical requirements, and demonstrate improved performance with lower dropout voltage (0.21V vs. 0.26V) and reduced quiescent current (900 nA vs. 1 µA). These parts are ROHS3 compliant and REACH unaffected, matching the compliance profile of the original part.

The S-T111B33MC-OGSTFU provides a direct series match with Active status and identical electrical specifications to the original part, offering the most straightforward replacement path.

The S-1112B33MC-L6STFU and S-1122B33MC-L8STFU are functionally equivalent alternatives with Active status and identical core specifications, suitable for applications where the S-1167 series is unavailable.

Secondary Substitute (Cross-Manufacturer):

The XC6504A331MR-G from Torex Semiconductor Ltd meets the 3.3V output and 150mA current requirements with Active product status. However, this part operates with significantly higher dropout voltage (0.67V at 150mA) and uses SOT-25 packaging instead of SOT-23-5. Board-level layout modifications are required for package compatibility. This substitute is appropriate only when ABLIC alternatives are unavailable and the application can accommodate the increased dropout voltage and power dissipation.

Frequently Asked Questions (FAQ)

Q: Can S-1167B33-M5T1U directly replace S-T111B33MC-OGSTFG without circuit modifications?

A: Yes. Both parts provide 3.3V fixed output at 150mA in SOT-23-5 packaging with identical pin configuration. The S-1167B33-M5T1U offers improved performance characteristics (lower dropout voltage and quiescent current) and requires no circuit modifications for direct substitution.

Q: What is the difference between S-1167A33-M5T1U and S-1167B33-M5T1U?

A: Both parts are from the S-1167 series with identical electrical specifications and performance. The primary difference is inventory availability (907 Pcs vs. 4340 Pcs). Selection should be based on supply chain requirements and lead time considerations.

Q: Why is the XC6504A331MR-G listed as a substitute if it has higher dropout voltage?

A: The XC6504A331MR-G meets the core functional requirements (3.3V output, 150mA current, SOT package family) and maintains Active product status. However, the 0.67V dropout voltage at 150mA versus 0.26V for ABLIC parts results in significantly higher power dissipation. This part is suitable only when ABLIC alternatives are unavailable and thermal design can accommodate the increased dissipation.

Q: Is the XC6504A331MR-G pin-compatible with the original part?

A: Both parts use 5-pin packages (SOT-23-5 vs. SOT-25), but the physical footprints differ. SOT-25 is larger than SOT-23-5, requiring PCB layout modifications. Pin functionality is compatible (VIN, GND, VOUT, EN, NC), but board-level redesign is necessary.

Q: What compliance certifications apply to all substitute parts?

A: All listed substitute parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8542.39.0001, matching the compliance profile of the original S-T111B33MC-OGSTFG.

Q: Why is S-T111B33MC-OGSTFG marked as "Not For New Designs"?

A: This product status indicates the part is in mature/end-of-life phase. While current inventory is available (50300 Pcs), ABLIC recommends using Active alternatives for new designs to ensure long-term supply continuity and access to design support.