AP139-30WG-7 Equivalent & Substitute Parts

Part Overview

The AP139-30WG-7 is a linear voltage regulator IC from Diodes Incorporated, delivering a fixed 3V output at 300mA in an SOT-25 surface mount package. This device is classified as Last Time Buy, indicating end-of-life status. Finding equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring 3V regulated power in compact form factors.

Key Parameters

Parameter	Value
Manufacturer Part Number	AP139-30WG-7
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Output Voltage (Fixed)	3V
Output Current	300mA
Input Voltage (Max)	5.5V
Dropout Voltage (Max)	0.45V @ 300mA
Quiescent Current	60 µA
Package / Case	SC-74A, SOT-753 (SOT-25)
Operating Temperature	-40°C ~ 85°C
Product Status	Last Time Buy
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the AP139-30WG-7 is determined by the following critical parameters:

Output voltage: 3V fixed
Output current capability: 300mA minimum
Package compatibility: SOT-25 or equivalent surface mount form factor
Input voltage range: 5.5V maximum
Operating temperature range: -40°C to 85°C minimum
Control features: Enable function required
Protection features: Over current and over temperature protection

Substitute parts are grouped into two categories:

MFR Recommended Substitutes: Parts from the original manufacturer (Diodes Incorporated) with active product status and improved electrical characteristics.
Parametric Equivalents: Parts meeting core electrical specifications, including alternative manufacturers with compatible functionality.

Parameter Comparison

Parameter	AP139-30WG-7	AP7343-30W5-7	AP139-30WL-7	TPS73230MDBVREP
Manufacturer	Diodes Inc.	Diodes Inc.	Diodes Inc.	Texas Instruments
Output Voltage	3V	3V	3V	3V
Output Current	300mA	300mA	300mA	250mA
Input Voltage (Max)	5.5V	5.25V	5.5V	5.5V
Dropout Voltage (Max)	0.45V @ 300mA	0.29V @ 300mA	0.45V @ 300mA	0.15V @ 250mA
Quiescent Current	60 µA	60 µA	60 µA	550 µA
Package	SOT-25	SOT-25	SOT-25	SOT-23-5
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-55°C ~ 125°C
Product Status	Last Time Buy	Active	Discontinued at DiGi Electronics	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: AP7343-30W5-7

The AP7343-30W5-7 is the preferred substitute. It is manufactured by Diodes Incorporated with Active product status, ensuring long-term availability. This part maintains identical output voltage (3V) and current (300mA) specifications while offering improved dropout voltage performance (0.29V vs. 0.45V). Both parts are ROHS3 compliant and operate within the same temperature range. The AP7343-30W5-7 is available in Tape & Reel packaging with 4,300 units in stock.

Secondary Recommendation: TPS73230MDBVREP

The TPS73230MDBVREP from Texas Instruments is an Active product with extended operating temperature range (-55°C to 125°C) and superior dropout voltage (0.15V @ 250mA). This part is suitable for applications where the 250mA output current is sufficient. The package differs (SOT-23-5 vs. SOT-25), requiring PCB layout modification. ROHS3 compliance and broad temperature support make this suitable for demanding environments.

Tertiary Option: AP139-30WL-7

The AP139-30WL-7 is a parametric equivalent from Diodes Incorporated with identical electrical specifications to the main part. However, it is Discontinued at DiGi Electronics and available only in Cut Tape packaging. This option is suitable only for existing inventory management or legacy system maintenance.

Frequently Asked Questions (FAQ)

Q: Can AP7343-30W5-7 directly replace AP139-30WG-7 on the PCB?

A: Yes. Both parts use the SOT-25 package (SC-74A, SOT-753) with identical pinout and footprint. No PCB modification is required. The AP7343-30W5-7 offers improved electrical performance with lower dropout voltage.

Q: What is the key difference between AP139-30WG-7 and TPS73230MDBVREP?

A: The primary differences are package type (SOT-25 vs. SOT-23-5), output current (300mA vs. 250mA), and quiescent current (60 µA vs. 550 µA). The TPS73230MDBVREP requires PCB layout changes and is suitable only for applications requiring 250mA or less.

Q: Why is AP139-30WL-7 not recommended as a primary substitute?

A: Although electrically equivalent, AP139-30WL-7 is Discontinued at DiGi Electronics and available only in Cut Tape packaging. AP7343-30W5-7 provides superior performance with Active status and better availability.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (AP7343-30W5-7, AP139-30WL-7, and TPS73230MDBVREP) are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements.

Q: Can I use TPS73230MDBVREP in a design requiring 300mA output?

A: No. The TPS73230MDBVREP is rated for 250mA maximum output current. Using it in a 300mA application exceeds its specifications and may cause thermal stress or device failure.

Q: What is the impact of lower dropout voltage in AP7343-30W5-7?

A: Lower dropout voltage (0.29V vs. 0.45V) reduces power dissipation and heat generation, improving efficiency and thermal performance in the same package. This is a performance advantage with no design trade-offs.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message