AP1086D50L-13 Equivalent & Substitute Parts

Part Overview

The AP1086D50L-13 is a linear voltage regulator IC from Diodes Incorporated, designed to deliver a fixed 5V output at 1.5A in a TO-252-3 (DPAK) surface mount package. This component is classified as a Power Management PMIC and is currently discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production continuity. The regulator includes integrated over-current and over-temperature protection, making it suitable for general-purpose 5V power supply applications.

Key Parameters

Parameter	Value
Manufacturer	Diodes Incorporated
Output Voltage (Fixed)	5V
Output Current	1.5A
Input Voltage (Max)	12V
Voltage Dropout (Max)	1.4V @ 1.5A
Quiescent Current	10 mA
PSRR	60dB (120Hz)
Operating Temperature	0°C ~ 125°C (TJ)
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type	Surface Mount
Protection Features	Over Current, Over Temperature
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the AP1086D50L-13 is determined by the following critical parameters:

Fixed output voltage of 5V
Output current capability of 1.5A minimum
TO-252-3 (DPAK) package compatibility
Surface mount configuration
Over-current and over-temperature protection
ROHS3 compliance

Two categories of substitutes are identified:

Parametric Equivalents (Same Manufacturer): Parts that maintain identical electrical specifications and package form factor within the Diodes Incorporated AP1086 series. These include AP1086D50G-13, which differs only in moisture sensitivity classification and product status.

Direct Manufacturer Substitute (Cross-Manufacturer): The LD1086DT50TR from STMicroelectronics provides functional equivalence with enhanced specifications in certain parameters, including higher maximum input voltage (30V vs. 12V) and extended operating temperature range (-40°C to 125°C vs. 0°C to 125°C).

Parameter Comparison

Parameter	AP1086D50L-13	AP1086D50G-13	LD1086DT50TR
Manufacturer	Diodes Incorporated	Diodes Incorporated	STMicroelectronics
Output Voltage (Fixed)	5V	5V	5V
Output Current	1.5A	1.5A	1.5A
Input Voltage (Max)	12V	12V	30V
Voltage Dropout (Max)	1.4V @ 1.5A	1.4V @ 1.5A	1.5V @ 1.5A
Quiescent Current	10 mA	10 mA	10 mA
PSRR	60dB (120Hz)	60dB (120Hz)	75dB (120Hz)
Operating Temperature	0°C ~ 125°C (TJ)	0°C ~ 125°C (TJ)	-40°C ~ 125°C
Package / Case	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK
Product Status	Discontinued at DiGi Electronics	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

AP1086D50G-13: This parametric equivalent from Diodes Incorporated is suitable for direct replacement in applications where the AP1086D50L-13 is specified. It maintains identical electrical performance and package compatibility. The improved moisture sensitivity level (MSL 1 vs. MSL 3) provides extended shelf life and reduced handling constraints. However, this part is classified as obsolete, limiting long-term availability.

LD1086DT50TR: This STMicroelectronics substitute is the preferred choice for new designs and ongoing production due to its active product status and superior availability (15,650 pcs in stock). The LD1086DT50TR offers enhanced specifications including higher maximum input voltage tolerance (30V) and extended operating temperature range (-40°C to 125°C), providing greater design margin for applications with variable input conditions or extreme temperature environments. The marginally higher dropout voltage (1.5V vs. 1.4V) is negligible in most 5V regulator applications. All parts maintain ROHS3 compliance and identical output current capability.

Frequently Asked Questions (FAQ)

Q: Can the LD1086DT50TR directly replace the AP1086D50L-13 without PCB modifications?

A: Yes. Both parts use the TO-252-3 (DPAK) package with identical pinout and lead configuration. No PCB layout changes are required for mechanical or electrical compatibility.

Q: What is the significance of the higher input voltage rating on the LD1086DT50TR (30V vs. 12V)?

A: The LD1086DT50TR accommodates higher input voltage sources without exceeding absolute maximum ratings. This is beneficial in applications with unregulated or variable input supplies. The AP1086D50L-13 is limited to 12V maximum input, restricting its use in higher-voltage systems.

Q: Does the 0.1V difference in dropout voltage between AP1086D50L-13 (1.4V) and LD1086DT50TR (1.5V) affect circuit performance?

A: For most 5V regulator applications, this difference is negligible. The additional 0.1V dropout margin is typically absorbed within standard power supply design tolerances. Applications requiring minimum input voltage headroom should calculate specific requirements based on their input voltage range.

Q: Why is AP1086D50G-13 classified as obsolete despite higher inventory availability?

A: Product status reflects manufacturer discontinuation decisions independent of current stock levels. Obsolete classification indicates no future production or support from the manufacturer, making it unsuitable for long-term production planning despite current availability.

Q: Are all three parts ROHS3 compliant?

A: Yes. AP1086D50L-13, AP1086D50G-13, and LD1086DT50TR all carry ROHS3 compliance certification, meeting environmental and regulatory requirements for electronic component manufacturing and use.

Q: What is the practical difference between MSL 3 (168 Hours) and MSL 1 (Unlimited)?

A: MSL 3 components require reflow soldering within 168 hours of moisture exposure, necessitating controlled storage and handling. MSL 1 components have unlimited shelf life without moisture sensitivity constraints, reducing inventory management complexity and handling risk.

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