RT9183-25GL Equivalent & Substitute Parts

Part Overview

The RT9183-25GL is a linear voltage regulator IC from Richtek USA Inc. designed for positive fixed output applications. This Surface Mount device delivers 1.5A output current at a fixed 2.5V output voltage with a maximum dropout voltage of 0.5V at full load. The part is classified as Obsolete, making identification of equivalent and substitute components essential for ongoing design support and production continuity. Active alternatives with identical or superior electrical characteristics are available from multiple manufacturers.

Key Parameters

Parameter	Value
Output Configuration	Positive
Output Type	Fixed
Number of Regulators	1
Voltage - Input (Max)	5.5V
Voltage - Output (Min/Fixed)	2.5V
Voltage Dropout (Max)	0.5V @ 1.5A
Current - Output	1.5A
Current - Quiescent (Iq)	500 µA
Protection Features	Over Current, Over Temperature
Operating Temperature	-40°C ~ 125°C
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the RT9183-25GL is determined by the following critical parameters:

Output voltage: 2.5V fixed
Output current capability: 1.5A minimum
Package type: TO-252-3 (DPAK)
Output configuration: Positive fixed regulator
Protection features: Over Current and Over Temperature protection
RoHS3 compliance

Parts meeting all these criteria are classified as direct substitutes. The RT9183-25GLF represents a parametric equivalent from the same manufacturer with identical electrical specifications but Active product status. The AP7363-25D-13 and LD39150DT25-R are similar regulators meeting the core functional requirements with variations in secondary parameters such as quiescent current, dropout voltage, and operating temperature range.

Parameter Comparison

Parameter	RT9183-25GL	RT9183-25GLF	AP7363-25D-13	LD39150DT25-R
Manufacturer	Richtek USA Inc.	Richtek USA Inc.	Diodes Incorporated	STMicroelectronics
Product Status	Obsolete	Active	Active	Active
Output Voltage	2.5V	2.5V	2.5V	2.5V
Output Current	1.5A	1.5A	1.5A	1.5A
Voltage - Input (Max)	5.5V	5.5V	5.5V	6V
Voltage Dropout (Max)	0.5V @ 1.5A	0.5V @ 1.5A	0.24V @ 1.5A	0.4V @ 1.5A
Current - Quiescent (Iq)	500 µA	500 µA	1.2 mA	2.5 mA
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 125°C
Package / Case	TO-252-3	TO-252-3	TO-252-3	TO-252-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The RT9183-25GLF is the primary recommended substitute for the obsolete RT9183-25GL. Both parts are manufactured by Richtek USA Inc. and share identical electrical specifications, operating temperature range, and MSL rating. The RT9183-25GLF maintains Active product status, ensuring long-term availability and supply chain continuity.

The AP7363-25D-13 from Diodes Incorporated and LD39150DT25-R from STMicroelectronics are functionally equivalent alternatives. Both devices meet the core requirements of 2.5V fixed output at 1.5A with TO-252-3 packaging and RoHS3 compliance. The AP7363-25D-13 offers superior dropout voltage performance (0.24V vs. 0.5V) and lower MSL sensitivity. The LD39150DT25-R provides the widest input voltage range (6V maximum) and maintains the full -40°C to 125°C operating temperature range. Both alternatives carry Active product status with unlimited MSL ratings, supporting extended storage and handling flexibility.

Selection between these alternatives depends on specific application requirements regarding input voltage headroom, quiescent current consumption, and thermal operating conditions.

Frequently Asked Questions (FAQ)

Q: Can the RT9183-25GLF directly replace the RT9183-25GL without circuit modifications?

A: Yes. The RT9183-25GLF is a parametric equivalent with identical electrical specifications, output voltage, current rating, dropout voltage, and operating temperature range. No circuit modifications are required.

Q: What are the key differences between the Richtek RT9183-25GLF and the Diodes AP7363-25D-13?

A: Both deliver 2.5V at 1.5A in TO-252-3 packaging. The AP7363-25D-13 features lower dropout voltage (0.24V vs. 0.5V) and higher quiescent current (1.2 mA vs. 500 µA). The AP7363-25D-13 operates to 85°C maximum junction temperature, while the RT9183-25GLF extends to 125°C. The AP7363-25D-13 carries MSL-1 rating versus MSL-3 for the RT9183-25GLF.

Q: Is the LD39150DT25-R from STMicroelectronics compatible with the original RT9183-25GL design?

A: Yes. The LD39150DT25-R meets all functional requirements: 2.5V fixed output, 1.5A capability, TO-252-3 package, and identical protection features. It accepts up to 6V input (versus 5.5V for the RT9183-25GL) and maintains the -40°C to 125°C operating range. Quiescent current is higher at 2.5 mA.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The RT9183-25GLF, AP7363-25D-13, and LD39150DT25-R are all ROHS3 Compliant and REACH Unaffected.

Q: What is the significance of the MSL rating difference between parts?

A: MSL-3 (168 Hours) indicates the RT9183-25GL and RT9183-25GLF require moisture bake-out procedures if storage exceeds 168 hours in high-humidity environments. MSL-1 (Unlimited) parts like the AP7363-25D-13 and LD39150DT25-R have no moisture sensitivity restrictions, simplifying inventory management and long-term storage.

Q: Can I use the AP7363-25D-13 in applications requiring operation above 85°C?

A: No. The AP7363-25D-13 is rated to -40°C ~ 85°C maximum. For applications requiring extended high-temperature operation to 125°C, use the RT9183-25GLF or LD39150DT25-R.

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