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AP9101CK-AJTRG1 Equivalent & Substitute Parts
Part Overview
The AP9101CK-AJTRG1 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 842 pieces in stock. Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design flexibility demands component sourcing from multiple suppliers or product generations.
Substiute Parts
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
Substitution of the AP9101CK-AJTRG1 is determined by the following critical parameters: identical battery chemistry (Lithium Ion/Polymer), single-cell configuration, matching fault protection capabilities (Over Current and Over Voltage), identical operating temperature range (-40°C ~ 85°C), Surface Mount mounting type, and SOT-25 package compatibility. All Diodes Incorporated AP9101 variants listed maintain these core electrical and mechanical specifications, differing only in packaging format (Tape & Reel versus Cut Tape) and product status (Active versus Obsolete). The Texas Instruments BQ29703DSER represents a cross-manufacturer alternative with equivalent functional protection but in a different package format (6-WSON).
Parameter Comparison
| Part Number | Manufacturer | Product Status | Packaging | Battery Chemistry | Cells | Fault Protection | Operating Temp | Package Type | RoHS Status | Inventory |
|---|---|---|---|---|---|---|---|---|---|---|
| AP9101CK-AJTRG1 | Diodes Incorporated | Active | Tape & Reel (TR) | Lithium Ion/Polymer | 1 | Over Current, Over Voltage | -40°C ~ 85°C | SOT-25 | ROHS3 Compliant | 842 Pcs |
| AP9101CAK-ABTRG1 | Diodes Incorporated | Obsolete | Cut Tape (CT) & Digi-Reel® | Lithium Ion/Polymer | 1 | Over Current, Over Voltage | -40°C ~ 85°C | SOT-25 | ROHS3 Compliant | 3100 Pcs |
| AP9101CAK-AKTRG1 | Diodes Incorporated | Obsolete | Cut Tape (CT) & Digi-Reel® | Lithium Ion/Polymer | 1 | Over Current, Over Voltage | -40°C ~ 85°C | SOT-25 | ROHS3 Compliant | 8700 Pcs |
| AP9101CAK-ANTRG1 | Diodes Incorporated | Obsolete | Cut Tape (CT) | Lithium Ion/Polymer | 1 | Over Current, Over Voltage | -40°C ~ 85°C | SOT-25 | ROHS3 Compliant | 9300 Pcs |
| AP9101CAK-BRTRG1 | Diodes Incorporated | Obsolete | Tape & Reel (TR) | Lithium Ion/Polymer | 1 | Over Current, Over Voltage | -40°C ~ 85°C | SOT-25 | ROHS3 Compliant | 3946 Pcs |
| AP9101CAK-CPTRG1 | Diodes Incorporated | Obsolete | Tape & Reel (TR) | Lithium Ion/Polymer | 1 | Over Current, Over Voltage | -40°C ~ 85°C | SOT-25 | ROHS3 Compliant | 3732 Pcs |
| AP9101CK-AHTRG1 | Diodes Incorporated | Obsolete | Cut Tape (CT) & Digi-Reel® | Lithium Ion/Polymer | 1 | Over Current, Over Voltage | -40°C ~ 85°C | SOT-25 | ROHS3 Compliant | 14500 Pcs |
| AP9101CK-AKTRG1 | Diodes Incorporated | Obsolete | Cut Tape (CT) | Lithium Ion/Polymer | 1 | Over Current, Over Voltage | -40°C ~ 85°C | SOT-25 | ROHS3 Compliant | 3820 Pcs |
| AP9101CK-ASTRG1 | Diodes Incorporated | Obsolete | Cut Tape (CT) | Lithium Ion/Polymer | 1 | Over Current, Over Voltage | -40°C ~ 85°C | SOT-25 | ROHS3 Compliant | 9400 Pcs |
| AP9101CK-AUTRG1 | Diodes Incorporated | Obsolete | Cut Tape (CT) | Lithium Ion/Polymer | 1 | Over Current, Over Voltage | -40°C ~ 85°C | SOT-25 | ROHS3 Compliant | 4300 Pcs |
| BQ29703DSER | Texas Instruments | Active | Tape & Reel (TR) | Lithium Ion/Polymer | 1 | Over Current, Over/Under Voltage, Short Circuit | -40°C ~ 85°C | 6-WSON (1.5x1.5) | ROHS3 Compliant | 18025 Pcs |
Engineering Selection Recommendations
For direct pin-compatible substitution within existing PCB designs, select from the Diodes Incorporated AP9101 family variants (AP9101CAK-ABTRG1, AP9101CAK-AKTRG1, AP9101CAK-ANTRG1, AP9101CAK-BRTRG1, AP9101CAK-CPTRG1, AP9101CK-AHTRG1, AP9101CK-AKTRG1, AP9101CK-ASTRG1, AP9101CK-AUTRG1). These parts maintain identical electrical specifications and SOT-25 package geometry. Selection among these variants depends on packaging format requirements: Tape & Reel (TR) for automated assembly processes, or Cut Tape (CT) for manual or lower-volume applications. Note that most AP9101 variants carry Obsolete product status; the AP9101CK-AJTRG1 remains the only Active variant in this family.
The Texas Instruments BQ29703DSER is suitable only for new designs requiring PCB layout modification, as it employs a 6-WSON package instead of SOT-25. This part offers extended fault protection including short-circuit detection and under-voltage monitoring. Both the AP9101CK-AJTRG1 and BQ29703DSER are Active products with ROHS3 compliance and REACH Unaffected status, suitable for current production applications.
Frequently Asked Questions (FAQ)
Q: Can AP9101 variants with Obsolete status be used in new production designs? A: Obsolete parts are no longer manufactured and available inventory is finite. For new production designs, use the Active product AP9101CK-AJTRG1 or the cross-manufacturer alternative BQ29703DSER. Obsolete variants may be acceptable for legacy product support or repair applications where existing inventory is available.
Q: What is the difference between Tape & Reel and Cut Tape packaging? A: Tape & Reel (TR) packaging is supplied on continuous carrier tape suitable for automated pick-and-place assembly equipment. Cut Tape (CT) is supplied as individual tape segments, typically used for manual assembly or lower-volume production. Both formats contain identical components; packaging selection depends on assembly process requirements.
Q: Is the BQ29703DSER a direct replacement for AP9101CK-AJTRG1? A: The BQ29703DSER is functionally equivalent for single-cell lithium ion/polymer battery protection but requires PCB redesign due to different package format (6-WSON versus SOT-25). It provides additional fault protection features (short-circuit detection, under-voltage monitoring) not present in the AP9101. Use only in new designs where layout modification is feasible.
Q: Are all listed parts ROHS3 compliant? A: Yes. All parts listed—both Diodes Incorporated AP9101 variants and the Texas Instruments BQ29703DSER—are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.
Q: What determines whether a part can substitute for the AP9101CK-AJTRG1? A: Substitution requires matching battery chemistry (Lithium Ion/Polymer), single-cell configuration, identical fault protection scope (minimum Over Current and Over Voltage), matching operating temperature range (-40°C ~ 85°C), Surface Mount mounting type, and compatible package format. Package compatibility is critical: SOT-25 variants are pin-compatible; different packages require PCB redesign.
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