AP1084D18G-13 Equivalent & Substitute Parts

Part Overview

The AP1084D18G-13 is a linear voltage regulator IC from Diodes Incorporated, delivering a fixed 1.8V output at 5A in a TO-252-3 (DPAK) surface mount package. This device is classified as obsolete, making identification of suitable alternatives essential for ongoing design support and production continuity. The regulator integrates over-current and over-temperature protection, operating across the industrial temperature range of 0°C to 125°C.

Key Parameters

Parameter	Value
Manufacturer	Diodes Incorporated
Part Number	AP1084D18G-13
Category	Power Management (PMIC)
Output Voltage (Fixed)	1.8V
Output Current	5A
Input Voltage (Max)	12V
Dropout Voltage (Max)	1.4V @ 5A
Quiescent Current	10 mA
Package	TO-252-3 (DPAK)
Operating Temperature	0°C ~ 125°C
Protection Features	Over Current, Over Temperature
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the AP1084D18G-13 is determined by the following critical parameters:

Output voltage specification: 1.8V fixed
Output current capability: minimum 5A
Input voltage tolerance: maximum 12V
Package compatibility: TO-252-3 (DPAK) surface mount
Protection features: over-current and over-temperature
Operating temperature range: 0°C to 125°C
Regulatory compliance: ROHS3 compliant

Substitute parts are grouped into two categories: direct functional equivalents from Diodes Incorporated (AZ1084CD-1.8TRG1 and AP1084D18L-13) and manufacturer-recommended alternatives from other suppliers (LD1117ADT18TR from STMicroelectronics). The AZ1084CD-1.8TRG1 maintains identical electrical specifications with active product status. The AP1084D18L-13 provides parametric equivalence but is discontinued at DiGi Electronics. The LD1117ADT18TR is a manufacturer-recommended option with reduced output current capability (1A vs. 5A), suitable only for applications with lower current requirements.

Parameter Comparison

Parameter	AP1084D18G-13	AZ1084CD-1.8TRG1	AP1084D18L-13	LD1117ADT18TR
Manufacturer	Diodes Incorporated	Diodes Incorporated	Diodes Incorporated	STMicroelectronics
Output Voltage	1.8V	1.8V	1.8V	1.8V
Output Current	5A	5A	5A	1A
Input Voltage (Max)	12V	12V	12V	15V
Dropout Voltage (Max)	1.4V @ 5A	1.5V @ 4.5A	1.4V @ 5A	1.3V @ 1A
Quiescent Current	10 mA	10 mA	10 mA	10 mA
Package	TO-252-3	TO-252-3	TO-252-3	TO-252-3
Operating Temperature	0°C ~ 125°C	0°C ~ 125°C	0°C ~ 125°C	0°C ~ 125°C
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature	Over Current, Over Temperature	Over Current, Over Temperature
Product Status	Obsolete	Active	Discontinued at DiGi Electronics	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For applications requiring full 5A output current capability with 1.8V fixed regulation, the AZ1084CD-1.8TRG1 is the primary substitute. This part maintains identical electrical specifications and is currently in active production status with ROHS3 compliance. The AZ1084CD-1.8TRG1 is supplied in Tape & Reel packaging, suitable for automated assembly processes.

The AP1084D18L-13 provides parametric equivalence to the AP1084D18G-13 but carries discontinued status at DiGi Electronics, limiting long-term availability for new designs.

The LD1117ADT18TR from STMicroelectronics is suitable only for applications where output current does not exceed 1A. This part is not recommended as a direct substitute for the AP1084D18G-13 due to the significant reduction in current capability (1A vs. 5A). However, it remains an option for lower-power implementations requiring 1.8V regulation with active product status and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the AZ1084CD-1.8TRG1 directly replace the AP1084D18G-13 in existing designs?

A: Yes. The AZ1084CD-1.8TRG1 maintains identical output voltage (1.8V), output current (5A), input voltage tolerance (12V max), dropout voltage specification (1.4V @ 5A), quiescent current (10 mA), and operating temperature range (0°C to 125°C). Both devices use the TO-252-3 package and include over-current and over-temperature protection. The primary difference is product status: AZ1084CD-1.8TRG1 is active, while AP1084D18G-13 is obsolete.

Q: What is the key limitation of the LD1117ADT18TR as a substitute?

A: The LD1117ADT18TR has a maximum output current of 1A, compared to the 5A capability of the AP1084D18G-13. This part is suitable only for applications with significantly lower current demands. All other electrical parameters, including output voltage, operating temperature range, and protection features, remain compatible.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The AZ1084CD-1.8TRG1, AP1084D18L-13, and LD1117ADT18TR are all ROHS3 compliant, matching the compliance status of the AP1084D18G-13.

Q: What packaging format is recommended for automated assembly?

A: The AZ1084CD-1.8TRG1 is supplied in Tape & Reel (TR) packaging, which is optimized for automated pick-and-place assembly. The AP1084D18G-13 and AP1084D18L-13 do not specify packaging format in the available data.

Q: Is the AP1084D18L-13 a viable long-term substitute?

A: The AP1084D18L-13 provides parametric equivalence but is discontinued at DiGi Electronics, limiting availability for ongoing production. For new designs or long-term production continuity, the AZ1084CD-1.8TRG1 is the recommended choice due to its active product status.

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