AP7366-28SN-7 Equivalent & Substitute Parts

Part Overview

The AP7366-28SN-7 is a linear voltage regulator IC from Diodes Incorporated designed for positive fixed output applications. This device delivers 600mA output current at a fixed 2.8V output voltage with a maximum input voltage of 6V. The part is currently classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity. Active equivalent models are available that maintain electrical compatibility while offering improved performance characteristics and current availability.

Key Parameters

Parameter	Value
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Fixed)	2.8V
Voltage - Input (Max)	6V
Current - Output	600mA
Voltage Dropout (Max)	0.35V @ 600mA
Current - Quiescent (Iq)	80 µA
PSRR	75dB ~ 55dB (1kHz ~ 10kHz)
Control Features	Enable
Protection Features	Over Current, Over Temperature, Short Circuit
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the AP7366-28SN-7 are identified based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Fixed output voltage of 2.8V
Maximum input voltage of 6V
Output current capability of 600mA
Positive output configuration
Enable control feature
Over Current, Over Temperature, and Short Circuit protection
Operating temperature range of -40°C to 85°C
Surface mount technology
ROHS3 compliance

Two substitute parts meet these criteria: AP7366EA-28SN-7 (6-UDFN package) and AP7366EA-28W5-7 (SOT-25 package). Both are manufactured by Diodes Incorporated and maintain full electrical compatibility with the obsolete AP7366-28SN-7. The primary differences are packaging format and minor performance improvements in dropout voltage for the 6-UDFN variant.

Parameter Comparison

Parameter	AP7366-28SN-7	AP7366EA-28SN-7	AP7366EA-28W5-7
Manufacturer	Diodes Incorporated	Diodes Incorporated	Diodes Incorporated
Product Status	Obsolete	Active	Active
Package / Case	6-UDFN Exposed Pad	6-UDFN Exposed Pad	SC-74A, SOT-753
Supplier Device Package	U-DFN2020-6	U-DFN2020-6	SOT-25
Voltage - Output (Fixed)	2.8V	2.8V	2.8V
Voltage - Input (Max)	6V	6V	6V
Current - Output	600mA	600mA	600mA
Voltage Dropout (Max)	0.35V @ 600mA	0.23V @ 600mA	0.35V @ 600mA
Current - Quiescent (Iq)	80 µA	80 µA	80 µA
PSRR	75dB ~ 55dB (1kHz ~ 10kHz)	75dB ~ 55dB (1kHz ~ 10kHz)	75dB ~ 55dB (1kHz ~ 10kHz)
Control Features	Enable	Enable	Enable
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both AP7366EA-28SN-7 and AP7366EA-28W5-7 are suitable replacements for the obsolete AP7366-28SN-7 based on electrical parameter equivalence and regulatory compliance. Selection between the two active substitutes depends on PCB layout constraints and packaging requirements.

The AP7366EA-28SN-7 maintains the original 6-UDFN package footprint and offers improved dropout voltage performance (0.23V versus 0.35V at 600mA), resulting in lower power dissipation and improved thermal characteristics. This variant is recommended for designs where the original package geometry must be preserved.

The AP7366EA-28W5-7 provides the same electrical specifications in a SOT-25 package format. This option is suitable for applications where the larger SOT-25 footprint is acceptable or preferred. Both parts maintain identical quiescent current, PSRR, protection features, and operating temperature range.

All three parts carry ROHS3 compliance, REACH Unaffected status, and MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can AP7366EA-28SN-7 be used as a direct replacement for AP7366-28SN-7?

A: Yes. The AP7366EA-28SN-7 is electrically equivalent and maintains the same 6-UDFN package footprint. The primary advantage is improved dropout voltage (0.23V versus 0.35V at 600mA) and active product status with current availability.

Q: What is the difference between AP7366EA-28SN-7 and AP7366EA-28W5-7?

A: Both parts are electrically equivalent with identical output voltage (2.8V), output current (600mA), input voltage rating (6V), and protection features. The primary difference is packaging: AP7366EA-28SN-7 uses 6-UDFN while AP7366EA-28W5-7 uses SOT-25. The dropout voltage specification differs slightly (0.23V versus 0.35V at 600mA).

Q: Are there any PCB layout considerations when switching between 6-UDFN and SOT-25 packages?

A: Yes. The 6-UDFN and SOT-25 packages have different footprints and pin configurations. PCB layout modifications are required when changing between these packages. Verify pin assignments and thermal pad requirements for each package variant before implementation.

Q: Do all substitute parts meet the same regulatory requirements?

A: Yes. AP7366EA-28SN-7 and AP7366EA-28W5-7 are both ROHS3 compliant, REACH Unaffected, and carry MSL Level 1 (Unlimited) rating, matching the compliance profile of the original AP7366-28SN-7.

Q: Why is the original AP7366-28SN-7 marked as obsolete?

A: The AP7366-28SN-7 has been discontinued by the manufacturer. Active equivalent models (AP7366EA-28SN-7 and AP7366EA-28W5-7) are available to support ongoing production and design requirements.

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