S-T111B18MC-OGDTFG Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The S-T111B18MC-OGDTFG is a linear voltage regulator IC from ABLIC Inc. designed for positive fixed 1.8V output at 150mA in SOT-23-5 surface mount packaging. This part is classified as Not For New Designs, making identification of active equivalent and substitute parts essential for ongoing production support and design continuity. Alternative models with identical or compatible electrical and mechanical specifications are available from both ABLIC Inc. and other manufacturers to ensure supply chain flexibility and long-term availability.

Key Parameters

Parameter	Value
Manufacturer Part Number	S-T111B18MC-OGDTFG
Manufacturer	ABLIC Inc.
Category	Power Management (PMIC)
Output Voltage (Fixed)	1.8V
Output Current	150mA
Input Voltage (Max)	6.5V
Voltage Dropout (Max)	0.47V @ 100mA
Quiescent Current	1 µA
Package / Case	SC-74A, SOT-753
Supplier Device Package	SOT-23-5
Operating Temperature Range	-40°C ~ 85°C (TA)
Product Status	Not For New Designs
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the S-T111B18MC-OGDTFG are classified based on strict electrical and mechanical parameter matching within the linear voltage regulator category. The primary substitution criteria are:

Critical Parameters for Substitution:

Output voltage: 1.8V fixed
Output current capability: 150mA
Input voltage maximum: 6.5V or higher
Package type: SOT-23-5 (SC-74A, SOT-753)
Surface mount mounting type
Operating temperature range: -40°C ~ 85°C
Control features: Enable function
Protection: Over Current protection

Substitute Categories:

Category 1: Direct ABLIC Inc. Equivalents (Active Status) Parts S-1112B18MC-L6DTFU, S-1122B18MC-L8DTFU, and S-T111B18MC-OGDTFU maintain identical electrical specifications and packaging. These parts are currently in Active product status, providing direct replacement capability with no design modifications required.

Category 2: ABLIC Inc. Alternative with Modified Specifications Part S-1167B18-M5T1U is an ABLIC Inc. alternative available in Cut Tape packaging. This part maintains core electrical compatibility (1.8V, 150mA, SOT-23-5) but features reduced quiescent current (900 nA vs. 1 µA) and lower supply current (16 µA vs. 90 µA), with a slightly higher dropout voltage (0.58V @ 100mA vs. 0.47V @ 100mA).

Category 3: Cross-Manufacturer Equivalent Part XC6504A181MR-G from Torex Semiconductor Ltd provides functional equivalence with identical output voltage and current specifications in SOT-25 packaging. This part operates within the same temperature range and includes Enable control and Over Current protection.

Parameter Comparison

Parameter	S-T111B18MC-OGDTFG	S-1112B18MC-L6DTFU	S-1122B18MC-L8DTFU	S-1167B18-M5T1U	S-T111B18MC-OGDTFU	XC6504A181MR-G
Manufacturer	ABLIC Inc.	ABLIC Inc.	ABLIC Inc.	ABLIC Inc.	ABLIC Inc.	Torex Semiconductor Ltd
Output Voltage	1.8V	1.8V	1.8V	1.8V	1.8V	1.8V
Output Current	150mA	150mA	150mA	150mA	150mA	150mA
Input Voltage (Max)	6.5V	6.5V	6.5V	6.5V	6.5V	6V
Voltage Dropout (Max)	0.47V @ 100mA	0.47V @ 100mA	0.47V @ 100mA	0.58V @ 100mA	0.47V @ 100mA	1.4V @ 150mA
Quiescent Current	1 µA	1 µA	1 µA	900 nA	1 µA	1.27 µA
Supply Current (Max)	90 µA	90 µA	90 µA	16 µA	90 µA	Not specified
PSRR	80dB (1kHz)	80dB (1kHz)	80dB (1kHz)	70dB (1kHz)	80dB (1kHz)	Not specified
Package / Case	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753
Supplier Device Package	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5	SOT-25
Packaging Format	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT)	Tape & Reel (TR)	Tape & Reel (TR)
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Product Status	Not For New Designs	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement (No Design Changes): Select S-1112B18MC-L6DTFU, S-1122B18MC-L8DTFU, or S-T111B18MC-OGDTFU. All three parts are ABLIC Inc. products in Active status with identical electrical specifications and SOT-23-5 packaging. These provide seamless substitution for the Not For New Designs S-T111B18MC-OGDTFG. All are ROHS3 compliant with MSL 1 rating.

For Low-Power Applications: Select S-1167B18-M5T1U when reduced quiescent current (900 nA) and supply current (16 µA) are beneficial. This part maintains 1.8V/150mA output capability and SOT-23-5 packaging. The slightly higher dropout voltage (0.58V @ 100mA) and lower PSRR (70dB vs. 80dB) must be evaluated against power consumption benefits. Available in Cut Tape packaging format.

For Cross-Manufacturer Flexibility: Select XC6504A181MR-G from Torex Semiconductor Ltd when supply diversification is required. This part maintains 1.8V/150mA output and -40°C ~ 85°C operating range with Enable control and Over Current protection. The maximum input voltage is 6V (vs. 6.5V) and dropout voltage is significantly higher (1.4V @ 150mA). SOT-25 package requires PCB layout verification for pin compatibility despite identical case designation.

All substitute parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 moisture sensitivity rating, matching the original part's compliance profile.

Frequently Asked Questions (FAQ)

Q: Can S-1167B18-M5T1U be used as a direct drop-in replacement for S-T111B18MC-OGDTFG?

A: S-1167B18-M5T1U is electrically compatible for 1.8V/150mA applications and uses identical SOT-23-5 packaging. However, the higher dropout voltage (0.58V vs. 0.47V @ 100mA) and lower PSRR (70dB vs. 80dB) may affect performance in noise-sensitive or low-headroom applications. Verify these specifications against your circuit requirements before substitution.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging is supplied on continuous carrier tape suitable for automated pick-and-place assembly. Cut Tape (CT) packaging is supplied as individual segments cut from the carrier tape, typically for lower-volume or manual assembly applications. Both formats contain identical components; the difference is in supply format and handling.

Q: Is XC6504A181MR-G a suitable replacement despite the higher dropout voltage?

A: XC6504A181MR-G maintains 1.8V/150mA output and operates across -40°C ~ 85°C. The 1.4V dropout voltage @ 150mA is significantly higher than the original 0.47V @ 100mA. This part is suitable only if your input voltage headroom and thermal budget accommodate the increased dropout. The lower maximum input voltage (6V vs. 6.5V) must also be verified against your power supply specifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed—S-1112B18MC-L6DTFU, S-1122B18MC-L8DTFU, S-1167B18-M5T1U, S-T111B18MC-OGDTFU, and XC6504A181MR-G—are ROHS3 compliant with MSL 1 moisture sensitivity rating, matching the original part's environmental compliance.

Q: Why is the original S-T111B18MC-OGDTFG marked as Not For New Designs?

A: Parts marked Not For New Designs are typically in end-of-life phase or have been superseded by newer alternatives. ABLIC Inc. offers active equivalents (S-1112B18MC-L6DTFU, S-1122B18MC-L8DTFU, S-T111B18MC-OGDTFU) with identical specifications for new designs and ongoing production support.

Q: Can I use S-T111B18MC-OGDTFU instead of S-T111B18MC-OGDTFG?

A: Yes. S-T111B18MC-OGDTFU is an active-status variant of the same S-T111 series with identical electrical specifications, packaging, and compliance. The difference is in the packaging suffix (OGDTFU vs. OGDTFG), which typically indicates different manufacturing batches or supply dates. Both are functionally equivalent.

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