AP1506-K5G-13 Equivalent & Substitute Parts

Part Overview

The AP1506-K5G-13 is a buck switching regulator IC manufactured by Diodes Incorporated, designed for positive adjustable output applications. This device operates as a step-down converter with a fixed switching frequency of 150kHz and delivers up to 3A output current across an adjustable voltage range of 1.23V to 18V. The component is housed in a TO-263-6 D2PAK package with 5 leads plus tab.

The AP1506-K5G-13 is classified as obsolete. Identifying suitable substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Key Parameters

Parameter	Value
Manufacturer	Diodes Incorporated
Part Number	AP1506-K5G-13
Category	Power Management (PMIC)
Function	Step-Down (Buck)
Output Configuration	Positive Adjustable
Input Voltage Range	4.5V to 22V
Output Voltage Range	1.23V to 18V
Output Current	3A
Switching Frequency	150kHz
Package Type	TO-263-6 D2PAK (5 Leads + Tab)
Operating Temperature	-20°C to 85°C
Product Status	Obsolete
RoHS Status	RoHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the AP1506-K5G-13 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Identical switching topology (buck converter)
Identical output configuration (positive adjustable)
Identical switching frequency (150kHz)
Identical package type (TO-263-6 D2PAK with 5 leads plus tab)
Input voltage range must encompass or exceed the original specification (minimum 4.5V input)
Output voltage range must encompass or exceed the original specification (minimum 1.23V to maximum 18V)
Output current rating must meet or exceed 3A

Mechanical Compatibility Requirements:

Surface mount mounting type
TO-263-6 D2PAK package footprint compatibility

The SI-8008HD from Sanken Electric USA Inc. meets all substitution criteria. This device maintains identical switching topology, output configuration, switching frequency, and package type while providing enhanced electrical performance specifications.

Parameter Comparison

Parameter	AP1506-K5G-13 (Main Part)	SI-8008HD (Substitute)	Compatibility
Manufacturer	Diodes Incorporated	Sanken Electric USA Inc.	Different manufacturer
Category	Power Management (PMIC)	Power Management (PMIC)	Identical
Function	Step-Down	Step-Down	Identical
Output Configuration	Positive Adjustable	Positive Adjustable	Identical
Input Voltage (Min)	4.5V	4.5V	Identical
Input Voltage (Max)	22V	40V	Substitute exceeds specification
Output Voltage (Min)	1.23V	0.8V	Substitute exceeds specification
Output Voltage (Max)	18V	24V	Substitute exceeds specification
Output Current	3A	5.5A	Substitute exceeds specification
Switching Frequency	150kHz	150kHz	Identical
Synchronous Rectifier	No	No	Identical
Operating Temperature	-20°C to 85°C	-30°C to 85°C	Substitute exceeds specification
Package Type	TO-263-6 D2PAK (5 Leads + Tab)	TO-263-6 D2PAK (5 Leads + Tab)	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Product Status	Obsolete	Active	Substitute is active
RoHS Status	RoHS3 Compliant	RoHS Compliant	Both compliant

Engineering Selection Recommendations

The SI-8008HD is a direct functional substitute for the AP1506-K5G-13. Both devices share identical switching topology, output configuration, switching frequency, and package footprint. The SI-8008HD is currently in active production status, whereas the AP1506-K5G-13 is obsolete, making the SI-8008HD the appropriate choice for new designs and ongoing production requirements.

The SI-8008HD provides enhanced electrical performance across all key parameters: higher maximum input voltage (40V vs. 22V), lower minimum output voltage (0.8V vs. 1.23V), higher maximum output voltage (24V vs. 18V), higher output current capability (5.5A vs. 3A), and extended lower operating temperature limit (-30°C vs. -20°C). These enhancements ensure compatibility with the original design while providing additional design margin.

Both devices maintain RoHS compliance and identical package specifications, ensuring direct PCB footprint compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the SI-8008HD be used as a direct replacement for the AP1506-K5G-13 without PCB modifications?

A: Yes. Both devices use the TO-263-6 D2PAK package with identical pinout and footprint. No PCB layout changes are required for substitution.

Q: What are the key electrical differences between these devices?

A: The SI-8008HD provides higher performance specifications across all parameters. It supports higher input voltage (40V maximum vs. 22V), lower minimum output voltage (0.8V vs. 1.23V), higher maximum output voltage (24V vs. 18V), and greater output current (5.5A vs. 3A). These differences represent enhancements that maintain backward compatibility with designs using the AP1506-K5G-13.

Q: Why is the AP1506-K5G-13 classified as obsolete?

A: The AP1506-K5G-13 has been discontinued by Diodes Incorporated. The SI-8008HD is the recommended active alternative for new production and design implementations.

Q: Are there any compliance or certification differences between these parts?

A: Both devices are RoHS compliant. The AP1506-K5G-13 carries RoHS3 certification, while the SI-8008HD carries RoHS certification. Both meet regulatory requirements for electronic component use.

Q: What is the moisture sensitivity level difference?

A: The AP1506-K5G-13 has MSL 3 (168 hours), while the SI-8008HD has MSL 1 (unlimited). The SI-8008HD offers superior moisture resistance characteristics.

Q: Can the SI-8008HD handle the same output current as the AP1506-K5G-13?

A: Yes. The SI-8008HD is rated for 5.5A output current, which exceeds the 3A requirement of the AP1506-K5G-13, ensuring full compatibility and additional design margin.

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