AP65200FK-7 Equivalent & Substitute Parts

Part Overview

The AP65200FK-7 is a buck switching regulator IC manufactured by Diodes Incorporated, designed for positive adjustable output applications with 2A output current capability. This component operates as a step-down converter with a synchronous rectifier, supporting input voltages from 4.7V to 18V and adjustable output from 0.925V to 16V at a switching frequency of 340kHz.

The AP65200FK-7 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or redesign requirements for applications currently utilizing this regulator.

Key Parameters

Parameter	Value
Manufacturer Part Number	AP65200FK-7
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Function	Step-Down (Buck)
Output Configuration	Positive Adjustable
Number of Outputs	1
Voltage - Input (Min)	4.7V
Voltage - Input (Max)	18V
Voltage - Output (Min/Fixed)	0.925V
Voltage - Output (Max)	16V
Current - Output	2A
Frequency - Switching	340kHz
Synchronous Rectifier	Yes
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	10-UFDFN Exposed Pad
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the AP65200FK-7 are identified based on functional equivalence across the following critical parameters:

Step-down (buck) topology with positive adjustable output
2A output current rating
Synchronous rectifier implementation
Operating temperature range of -40°C to 85°C
Surface mount packaging
ROHS3 compliance and REACH unaffected status

The two substitute parts identified—RT8284NGS and XC9243B08CDR-G—meet these core functional requirements. However, they differ in input voltage range, output voltage range, switching frequency, package type, and moisture sensitivity level. These differences must be evaluated against specific application requirements before selection.

Parameter Comparison

Parameter	AP65200FK-7	RT8284NGS	XC9243B08CDR-G
Manufacturer	Diodes Incorporated	Richtek USA Inc.	Torex Semiconductor Ltd
Product Status	Obsolete	Active	Active
Function	Step-Down	Step-Down	Step-Down
Output Configuration	Positive Adjustable	Positive Adjustable	Positive Adjustable
Number of Outputs	1	1	1
Voltage - Input (Min)	4.7V	4.5V	2.7V
Voltage - Input (Max)	18V	23V	6V
Voltage - Output (Min/Fixed)	0.925V	0.923V	0.9V
Voltage - Output (Max)	16V	20V	6V
Current - Output	2A	2A	2A
Frequency - Switching	340kHz	340kHz	1.2MHz
Synchronous Rectifier	Yes	Yes	Yes
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
Package / Case	10-UFDFN Exposed Pad	8-SOIC (0.154", 3.90mm Width)	10-PowerUDFN
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	3 (168 Hours)	1 (Unlimited)

Engineering Selection Recommendations

Both RT8284NGS and XC9243B08CDR-G are active products with ROHS3 compliance and REACH unaffected status, providing superior supply chain availability compared to the obsolete AP65200FK-7.

RT8284NGS maintains the same 340kHz switching frequency as the AP65200FK-7 and supports a wider input voltage range (4.5V to 23V) and higher maximum output voltage (20V). However, it uses an 8-SOIC package instead of the 10-UFDFN, requiring PCB layout modifications. Moisture sensitivity level is MSL 3, requiring controlled storage conditions.

XC9243B08CDR-G operates at a higher switching frequency of 1.2MHz and maintains the same 10-pin DFN package form factor with MSL 1 (unlimited moisture tolerance). However, its input voltage range is limited to 2.7V to 6V and maximum output voltage is 6V, making it suitable only for applications within these constraints.

Selection between these substitutes depends on application input voltage requirements, output voltage requirements, PCB layout constraints, and storage environment conditions.

Frequently Asked Questions (FAQ)

Q: Can RT8284NGS directly replace AP65200FK-7 without PCB modifications?

A: No. RT8284NGS uses an 8-SOIC package while AP65200FK-7 uses a 10-UFDFN package. PCB layout and footprint changes are required. Pin configuration and functionality differ, requiring schematic review.

Q: Is XC9243B08CDR-G suitable for applications requiring 18V input?

A: No. XC9243B08CDR-G has a maximum input voltage of 6V. It is suitable only for applications with input voltages between 2.7V and 6V.

Q: What are the moisture sensitivity implications of RT8284NGS?

A: RT8284NGS has MSL 3 rating, requiring storage at controlled humidity (≤60% RH) for up to 168 hours after package opening. XC9243B08CDR-G and the original AP65200FK-7 have MSL 1 (unlimited), requiring no special moisture control.

Q: Do all three parts support the same output voltage adjustment range?

A: No. AP65200FK-7 supports 0.925V to 16V, RT8284NGS supports 0.923V to 20V, and XC9243B08CDR-G supports 0.9V to 6V. Output voltage range compatibility must be verified for each application.

Q: What is the primary advantage of XC9243B08CDR-G over RT8284NGS?

A: XC9243B08CDR-G maintains the same 10-pin DFN package footprint as AP65200FK-7, minimizing PCB redesign. It also has MSL 1 rating, eliminating moisture sensitivity concerns. However, its limited input and output voltage ranges restrict its applicability.

Q: Are all three parts RoHS compliant?

A: Yes. AP65200FK-7, RT8284NGS, and XC9243B08CDR-G are all ROHS3 compliant and REACH unaffected.

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