AP5002SG-13 Equivalent & Substitute Parts

Part Overview

The AP5002SG-13 is a buck switching regulator IC manufactured by Diodes Incorporated, designed for positive adjustable output applications with 2A output current capability. This device operates across a 3.6V to 20V input range and delivers adjustable output from 0.8V to 20V. The component is classified as obsolete, making identification of functionally equivalent active alternatives essential for new designs and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	AP5002SG-13
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Function	Step-Down (Buck)
Output Configuration	Positive Adjustable
Number of Outputs	1
Voltage - Input (Min/Max)	3.6V / 20V
Voltage - Output (Min/Max)	0.8V / 20V
Current - Output	2A
Frequency - Switching	500kHz
Package / Case	8-SOIC (0.154", 3.90mm Width)
Operating Temperature	-20°C ~ 85°C (TA)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the AP5002SG-13 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Output topology: Buck (step-down) switching regulator
Output configuration: Positive adjustable
Minimum output voltage: 0.8V or lower
Output current rating: 2A or greater
Input voltage range: Must encompass or exceed 3.6V to 20V
Package type: 8-SOIC form factor with identical pinout compatibility

Compliance Requirements:

RoHS3 compliance
Surface mount technology

The substitute parts identified (TPS54231D and TPS54231DR) meet all electrical and mechanical compatibility criteria. Both are active products from Texas Instruments with enhanced specifications relative to the obsolete AP5002SG-13, including wider input voltage range (4.6V to 28V), higher maximum output voltage (25V), and extended operating temperature range (-40°C to 150°C junction temperature).

Parameter Comparison

Parameter	AP5002SG-13	TPS54231D	TPS54231DR
Manufacturer	Diodes Incorporated	Texas Instruments	Texas Instruments
Function	Step-Down	Step-Down	Step-Down
Output Configuration	Positive Adjustable	Positive Adjustable	Positive Adjustable
Number of Outputs	1	1	1
Voltage - Input (Min)	3.6V	4.6V	4.6V
Voltage - Input (Max)	20V	28V	28V
Voltage - Output (Min/Fixed)	0.8V	0.8V	0.8V
Voltage - Output (Max)	20V	25V	25V
Current - Output	2A	2A	2A
Frequency - Switching	500kHz	570kHz	570kHz
Synchronous Rectifier	No	No	No
Operating Temperature	-20°C ~ 85°C (TA)	-40°C ~ 150°C (TJ)	-40°C ~ 150°C (TJ)
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Both TPS54231D and TPS54231DR are direct functional equivalents of the AP5002SG-13 and are recommended for replacement in new designs and production applications. The TPS54231 series offers superior specifications including extended input voltage range (4.6V to 28V versus 3.6V to 20V), higher maximum output voltage capability (25V versus 20V), and wider operating temperature range (-40°C to 150°C junction temperature versus -20°C to 85°C ambient).

Both substitute parts maintain ROHS3 compliance and are manufactured by Texas Instruments, an active supplier with established product longevity. The primary distinction between TPS54231D and TPS54231DR is packaging format: TPS54231D is supplied in Tube packaging, while TPS54231DR is supplied in Cut Tape (CT) & Digi-Reel® format. Selection between these variants depends on procurement and assembly requirements rather than electrical performance.

The improved moisture sensitivity level (MSL 1 Unlimited versus MSL 3 168 Hours) of the substitute parts provides enhanced reliability in storage and handling environments.

Frequently Asked Questions (FAQ)

Q: Are TPS54231D and TPS54231DR electrically identical?

A: Yes. Both parts share the same base product number (TPS54231) and identical electrical specifications. The difference is packaging format only: TPS54231D uses Tube packaging while TPS54231DR uses Cut Tape & Digi-Reel® packaging.

Q: Can the TPS54231 series be used as a direct replacement without circuit modification?

A: The TPS54231 series maintains identical pinout and package form factor (8-SOIC) as the AP5002SG-13. Electrical parameters are compatible across the specified operating ranges. However, circuit validation is necessary to confirm performance within your specific application parameters.

Q: What is the significance of the wider input voltage range in the TPS54231?

A: The TPS54231 series accepts input voltage from 4.6V to 28V, compared to the AP5002SG-13 range of 3.6V to 20V. This extended range provides greater design flexibility for applications with variable input sources or higher supply voltages.

Q: How does the higher switching frequency (570kHz versus 500kHz) affect circuit design?

A: The increased switching frequency in the TPS54231 series allows for smaller external filter components while maintaining equivalent performance. Existing circuit designs using the AP5002SG-13 may benefit from component optimization, though the higher frequency is backward compatible with designs intended for 500kHz operation.

Q: What does MSL 1 (Unlimited) mean compared to MSL 3 (168 Hours)?

A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be exposed to ambient conditions before requiring baking. MSL 1 (Unlimited) means the TPS54231 series has no time restriction, providing superior shelf life and handling flexibility compared to the AP5002SG-13 MSL 3 (168 Hours) specification.

Q: Are both substitute parts currently in production?

A: Yes. Both TPS54231D and TPS54231DR are classified as Active products with established supply availability, ensuring long-term design support and procurement reliability.

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