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

Part Overview

The S-T111B18MC-OGDTFU is an active linear voltage regulator IC manufactured by ABLIC Inc., designed for positive fixed 1.8V output applications with 150mA current capacity in SOT-23-5 surface mount packaging. This PMIC operates across -40°C to 85°C and includes enable control and over-current protection features. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Key Parameters

Parameter	Value
Manufacturer	ABLIC Inc.
Part Number	S-T111B18MC-OGDTFU
Category	Power Management (PMIC)
Output Voltage (Fixed)	1.8V
Output Current	150mA
Input Voltage (Max)	6.5V
Dropout Voltage (Max)	0.47V @ 100mA
Package Type	SOT-23-5 (SC-74A)
Operating Temperature	-40°C ~ 85°C
Control Features	Enable
Protection	Over Current
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the S-T111B18MC-OGDTFU are qualified based on the following electrical and mechanical parameters:

Fixed output voltage of 1.8V
Output current rating of 150mA
Maximum input voltage of 6V or higher
Surface mount packaging (SOT-23-5 or SOT-25 compatible footprints)
Enable control and over-current protection features
Operating temperature range of -40°C to 85°C
Active product status with ROHS3 compliance

Two substitute parts meet these criteria: the S-1167B18-M5T1U (ABLIC Inc.) and the XC6504A181MR-G (Torex Semiconductor Ltd). Both maintain the same output voltage and current specifications while offering alternative quiescent current characteristics and dropout voltage performance.

Parameter Comparison

Parameter	S-T111B18MC-OGDTFU	S-1167B18-M5T1U	XC6504A181MR-G
Manufacturer	ABLIC Inc.	ABLIC Inc.	Torex Semiconductor Ltd
Output Voltage (Fixed)	1.8V	1.8V	1.8V
Output Current	150mA	150mA	150mA
Input Voltage (Max)	6.5V	6.5V	6V
Dropout Voltage (Max)	0.47V @ 100mA	0.58V @ 100mA	1.4V @ 150mA
Quiescent Current (Iq)	1 µA	900 nA	1.27 µA
Supply Current (Max)	90 µA	16 µA	Not specified
PSRR	80dB (1kHz)	70dB (1kHz)	Not specified
Package Type	SOT-23-5	SOT-23-5	SOT-25
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Control Features	Enable	Enable	Enable
Protection Features	Over Current	Over Current	Over Current
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active

Engineering Selection Recommendations

All three parts maintain active product status with ROHS3 compliance and REACH unaffected certification, ensuring regulatory alignment for current and future applications.

The S-T111B18MC-OGDTFU and S-1167B18-M5T1U are both ABLIC Inc. products in SOT-23-5 packaging with identical output specifications. The S-1167B18-M5T1U offers lower quiescent current (900 nA vs. 1 µA) and reduced supply current (16 µA vs. 90 µA), making it suitable for low-power standby applications. The S-T111B18MC-OGDTFU provides superior dropout voltage performance (0.47V vs. 0.58V at 100mA) and higher PSRR (80dB vs. 70dB at 1kHz).

The XC6504A181MR-G from Torex Semiconductor Ltd operates at a lower maximum input voltage (6V vs. 6.5V) and exhibits higher dropout voltage (1.4V at 150mA). This part is suitable for applications where input voltage remains below 6V and dropout voltage performance is not critical. The SOT-25 package requires PCB layout verification for footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can the S-1167B18-M5T1U directly replace the S-T111B18MC-OGDTFU?

A: Yes, within the specified electrical and mechanical parameters. Both parts deliver 1.8V at 150mA with identical operating temperature ranges and control features. The S-1167B18-M5T1U has lower quiescent current but slightly higher dropout voltage. PCB layout compatibility is maintained as both use SOT-23-5 packaging.

Q: What are the key differences between the S-T111B18MC-OGDTFU and XC6504A181MR-G?

A: The primary differences are maximum input voltage (6.5V vs. 6V) and dropout voltage performance (0.47V vs. 1.4V at rated current). The XC6504A181MR-G uses SOT-25 packaging instead of SOT-23-5, requiring PCB footprint verification. The XC6504A181MR-G is suitable only for applications where input voltage does not exceed 6V.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all three parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level and REACH unaffected status.

Q: Which substitute part offers the best low-power performance?

A: The S-1167B18-M5T1U provides the lowest quiescent current at 900 nA and the lowest supply current at 16 µA, making it optimal for battery-powered or low-power standby applications.

Q: Can the XC6504A181MR-G be used in all applications designed for the S-T111B18MC-OGDTFU?

A: No. The XC6504A181MR-G has a lower maximum input voltage (6V) and higher dropout voltage (1.4V). It is suitable only for applications where input voltage remains below 6V and dropout voltage performance is not a limiting factor. PCB layout must accommodate SOT-25 packaging.

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