AP9101CAK-AATRG1 Equivalent & Substitute Parts

Part Overview

The AP9101CAK-AATRG1 is a Battery Protection IC for single-cell Lithium Ion/Polymer applications, manufactured by Diodes Incorporated. This Surface Mount device in SOT-25 packaging provides over-current and over-voltage fault protection. The part is currently Active in product status with 977 units in stock. Equivalent substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when inventory constraints necessitate sourcing from alternative stock positions.

Key Parameters

Parameter	Value
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Function	Battery Protection
Battery Chemistry	Lithium Ion/Polymer
Number of Cells	1
Fault Protection	Over Current, Over Voltage
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	SC-74A, SOT-753
Supplier Device Package	SOT-25
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitute parts for the AP9101CAK-AATRG1 are determined by strict equivalence across the following critical parameters:

Manufacturer: Diodes Incorporated
Function: Battery Protection
Battery Chemistry: Lithium Ion/Polymer
Number of Cells: 1
Fault Protection: Over Current, Over Voltage
Operating Temperature Range: -40°C ~ 85°C (TA)
Mounting Type: Surface Mount
Package / Case: SC-74A, SOT-753
Supplier Device Package: SOT-25
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Substitutes differ only in packaging format (Tape & Reel vs. Cut Tape) and product status. All parametric equivalents maintain identical electrical and mechanical specifications, enabling direct substitution in circuit design and PCB assembly.

Parameter Comparison

Part Number	Manufacturer	Packaging	Product Status	Inventory (Pcs)	Function	Battery Chemistry	Cells	Fault Protection	Operating Temp	Package	RoHS
AP9101CAK-AATRG1	Diodes Incorporated	Tape & Reel (TR)	Active	977	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	-40°C ~ 85°C	SOT-25	ROHS3
AP9101CAK-ABTRG1	Diodes Incorporated	Cut Tape (CT) & Digi-Reel®	Obsolete	3100	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	-40°C ~ 85°C	SOT-25	ROHS3
AP9101CAK-AKTRG1	Diodes Incorporated	Cut Tape (CT) & Digi-Reel®	Obsolete	8700	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	-40°C ~ 85°C	SOT-25	ROHS3
AP9101CAK-ANTRG1	Diodes Incorporated	Cut Tape (CT)	Obsolete	9300	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	-40°C ~ 85°C	SOT-25	ROHS3
AP9101CAK-BRTRG1	Diodes Incorporated	Tape & Reel (TR)	Obsolete	3946	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	-40°C ~ 85°C	SOT-25	ROHS3
AP9101CAK-CPTRG1	Diodes Incorporated	Tape & Reel (TR)	Obsolete	3732	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	-40°C ~ 85°C	SOT-25	ROHS3
AP9101CK-AHTRG1	Diodes Incorporated	Cut Tape (CT) & Digi-Reel®	Obsolete	14500	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	-40°C ~ 85°C	SOT-25	ROHS3
AP9101CK-AKTRG1	Diodes Incorporated	Cut Tape (CT)	Obsolete	3820	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	-40°C ~ 85°C	SOT-25	ROHS3
AP9101CK-ASTRG1	Diodes Incorporated	Cut Tape (CT)	Obsolete	9400	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	-40°C ~ 85°C	SOT-25	ROHS3
AP9101CK-AUTRG1	Diodes Incorporated	Cut Tape (CT)	Obsolete	4300	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over Voltage	-40°C ~ 85°C	SOT-25	ROHS3
BQ29733DSER	Texas Instruments	Tape & Reel (TR)	Active	40374	Battery Protection	Lithium Ion/Polymer	1	Over Current, Over/Under Voltage, Short Circuit	-40°C ~ 85°C	6-WFDFN	ROHS3

Engineering Selection Recommendations

Within the Diodes Incorporated AP9101 family, all parametric equivalents are electrically and mechanically interchangeable. Selection among these parts should be based on:

Packaging Format Requirements: Tape & Reel (TR) packaging is standard for automated assembly lines. Cut Tape (CT) and Digi-Reel® formats are suitable for manual assembly or lower-volume production runs.

Product Status Consideration: The AP9101CAK-AATRG1 maintains Active status, ensuring long-term availability and supply chain stability. Obsolete variants (AP9101CAK-ABTRG1, AP9101CAK-AKTRG1, AP9101CAK-ANTRG1, AP9101CAK-BRTRG1, AP9101CAK-CPTRG1, AP9101CK-AHTRG1, AP9101CK-AKTRG1, AP9101CK-ASTRG1, AP9101CK-AUTRG1) should be used only when existing inventory must be consumed or when design legacy support is required.

Cross-Manufacturer Alternative: The BQ29733DSER from Texas Instruments is a parametric equivalent with expanded fault protection (Over Current, Over/Under Voltage, Short Circuit vs. Over Current, Over Voltage). This part operates in the same temperature range and maintains ROHS3 compliance. However, the package differs (6-WFDFN vs. SOT-25), requiring PCB layout and footprint modifications. This alternative is suitable only when circuit design permits package substitution and enhanced protection features are beneficial.

Compliance Status: All listed parts maintain ROHS3 compliance and REACH Unaffected status, meeting regulatory requirements for electronics manufacturing.

Frequently Asked Questions (FAQ)

Q: Can I substitute AP9101CAK-AATRG1 with any of the other AP9101 variants?

A: Yes. All AP9101 variants listed share identical electrical specifications, battery chemistry support, fault protection features, and operating temperature range. Substitution is valid from a circuit design perspective. Packaging format differences (Tape & Reel vs. Cut Tape) affect only the assembly process, not component functionality.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging supplies components on continuous carrier tape wound on reels, optimized for high-speed automated pick-and-place assembly. Cut Tape (CT) provides components on shorter tape segments, suitable for manual assembly or lower-volume production. Digi-Reel® is a proprietary format combining cut tape with reel compatibility. All three formats contain identical components.

Q: Why is the BQ29733DSER listed as an alternative if the package is different?

A: The BQ29733DSER is a manufacturer-recommended alternative that provides equivalent battery protection functionality with enhanced fault detection (includes under-voltage and short-circuit protection). The 6-WFDFN package requires PCB redesign but offers a smaller footprint. This alternative is suitable only when circuit layout permits package substitution and the additional protection features align with system requirements.

Q: Are obsolete AP9101 variants still usable in new designs?

A: Obsolete parts should not be selected for new production designs due to supply chain discontinuation risk. However, they remain functionally equivalent and may be used for legacy product support or when consuming existing inventory. The Active status AP9101CAK-AATRG1 is the recommended choice for new designs.

Q: Do all these parts meet the same regulatory standards?

A: Yes. All listed parts are ROHS3 compliant and REACH Unaffected, meeting current electronics manufacturing regulations. Moisture Sensitivity Level 1 (Unlimited) indicates no special storage or handling requirements.

Q: Can I mix different AP9101 variants in the same production batch?

A: Yes. All AP9101 variants are parametrically equivalent and will function identically in the circuit. However, mixing packaging formats may complicate assembly process setup. Standardizing on a single variant per production run is recommended for manufacturing efficiency.

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