S-T111B33MC-OGSTFU Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The S-T111B33MC-OGSTFU is a linear voltage regulator IC manufactured by ABLIC Inc., classified as a Power Management (PMIC) component. This device provides a fixed 3.3V positive output with 150mA current capacity in a surface-mount SOT-23-5 package. The part is currently active in production with 1054 units in stock inventory.

Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to supply constraints, inventory availability, or manufacturing transitions while maintaining electrical and mechanical compatibility within specified parameters.

Key Parameters

Parameter	Value
Manufacturer Part Number	S-T111B33MC-OGSTFU
Manufacturer	ABLIC Inc.
Category	Power Management (PMIC)
Output Voltage (Fixed)	3.3V
Output Current	150mA
Input Voltage (Max)	6.5V
Voltage Dropout (Max)	0.26V @ 100mA
Package / Case	SC-74A, SOT-753
Supplier Device Package	SOT-23-5
Operating Temperature Range	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the S-T111B33MC-OGSTFU are qualified based on the following critical parameters that determine functional equivalence:

Output voltage: 3.3V fixed
Output current capacity: 150mA minimum
Input voltage maximum: 6.5V or greater
Voltage dropout: 0.26V or lower at rated current
Package type: SOT-23-5 or compatible surface-mount package
Operating temperature range: -40°C to 85°C minimum
Output configuration: Positive fixed output
Protection features: Over current protection
Control features: Enable function
Compliance: ROHS3 compliant

Parts meeting these criteria are classified as parametric equivalents and may be substituted in applications where the S-T111B33MC-OGSTFU is specified.

Parameter Comparison

Parameter	S-T111B33MC-OGSTFU	S-1122B33MC-L8STFU	XC6504A331MR-G
Manufacturer	ABLIC Inc.	ABLIC Inc.	Torex Semiconductor Ltd
Output Voltage (Fixed)	3.3V	3.3V	3.3V
Output Current	150mA	150mA	150mA
Input Voltage (Max)	6.5V	6.5V	6V
Voltage Dropout (Max)	0.26V @ 100mA	0.26V @ 100mA	0.67V @ 150mA
Current - Quiescent (Iq)	1 µA	1 µA	1.5 µA
PSRR	80dB (1kHz)	80dB (1kHz)	Not specified
Package / Case	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753
Supplier Device Package	SOT-23-5	SOT-23-5	SOT-25
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Product Status	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory (Pcs)	1054	748	1303

Engineering Selection Recommendations

S-1122B33MC-L8STFU (ABLIC Inc.): This part is a parametric equivalent to the S-T111B33MC-OGSTFU with identical electrical specifications across all critical parameters. Both devices are manufactured by ABLIC Inc., share the same SOT-23-5 package configuration, and maintain equivalent performance characteristics including voltage dropout, quiescent current, and PSRR. Both parts are ROHS3 compliant and active in production status. This substitute provides direct functional replacement capability.

XC6504A331MR-G (Torex Semiconductor Ltd): This part meets the core functional requirements with matching 3.3V output, 150mA current capacity, and identical operating temperature range. The device is ROHS3 compliant and active in production. However, the XC6504A331MR-G exhibits higher voltage dropout (0.67V @ 150mA versus 0.26V @ 100mA) and slightly elevated quiescent current (1.5 µA versus 1 µA). The supplier device package designation differs (SOT-25 versus SOT-23-5), though both utilize the same physical case form (SC-74A, SOT-753). The maximum input voltage is specified at 6V compared to 6.5V for the primary part. This substitute is suitable for applications where the higher dropout voltage and input voltage specification do not present design constraints.

Frequently Asked Questions (FAQ)

Q: Can S-1122B33MC-L8STFU be used as a direct replacement for S-T111B33MC-OGSTFU?

A: Yes. The S-1122B33MC-L8STFU is a parametric equivalent with identical electrical specifications, package configuration, and compliance certifications. No design modifications are required for substitution.

Q: What are the key differences between S-T111B33MC-OGSTFU and XC6504A331MR-G?

A: The primary differences are voltage dropout (0.26V versus 0.67V at rated current), quiescent current (1 µA versus 1.5 µA), maximum input voltage (6.5V versus 6V), and supplier device package designation (SOT-23-5 versus SOT-25). Both devices share the same physical case form and output specifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts, including S-1122B33MC-L8STFU and XC6504A331MR-G, are ROHS3 compliant and REACH unaffected.

Q: Does the difference in supplier device package designation affect PCB compatibility?

A: No. Both SOT-23-5 and SOT-25 designations reference the same physical case form (SC-74A, SOT-753). PCB footprints and land patterns remain compatible across all listed parts.

Q: Which substitute part should be selected for low-power applications?

A: S-1122B33MC-L8STFU maintains identical quiescent current specifications (1 µA) to the primary part. XC6504A331MR-G exhibits slightly higher quiescent current (1.5 µA) and should be evaluated based on specific power budget requirements.

Q: Are there any temperature range limitations with substitute parts?

A: No. All substitute parts maintain the identical operating temperature range of -40°C to 85°C (TA), matching the primary part specification.

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