Part A
AP4313KTR-G1
다이오즈(주)
- Lifecycle
- Active
- Stock
- 3607 PCS
- Series
- 선형 증폭기 - 계측기, 연산 증폭기, 완충 증폭기
Replacement verdict
Compatible functional replacement candidate
The AP4313KTR-G1 and AP431QL-7 are both adjustable shunt voltage references sharing the same 2.5 V reference and SOT-23-3 package, but they differ in output current capability and reference voltage tolerance grade. The AP431QL-7 offers a wider cathode current range and tighter initial accuracy, making it the more capable device, while the AP4313KTR-G1 remains a viable substitute where its lower current handling and looser tolerance are acceptable. Designers should validate the current budget and accuracy requirements before substituting in either direction.
Reference Voltage
High match
Package Type
High match
Output Current Rating
Validation required
Voltage Tolerance Grade
Validation required
Parts at a glance
Part B
AP431QL-7
다이오즈(주)
- Lifecycle
- Active
- Stock
- 9877 PCS
- Package
- SOT-25
- Series
- PMIC - 전압 참조
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AP4313KTR-G1 | AP431QL-7 | Why it matters |
|---|---|---|---|
| Reference Voltage (Vref) | 1.24 V | 2.5 V | The regulated output voltage setpoint differs; a 1.24 V reference targets low-voltage rails while a 2.5 V reference targets higher rails, so they are not directly interchangeable in a given design. |
| Reference Voltage Tolerance | ±0.5% | ±0.5% | Tighter tolerance improves output accuracy; both share the same grade here, so accuracy class is not a differentiator. |
| Output Current Capability (Cathode) | 100 mA | 100 mA | Determines how much shunt current the device can sink; matching ratings means load-driving capability is comparable. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +85°C | A wider temperature range supports harsher environments; the AP4313KTR-G1 covers higher ambient temperatures than the AP431QL-7. |
| Package / Mounting | SOT-23-3 (Surface Mount) | SOT-23-3 (Surface Mount) | Package footprint and mounting style must match for board-level drop-in replacement; both use the same SOT-23-3 outline. |
| Supply / Cathode Voltage Range | Up to 18 V | Up to 36 V | Maximum cathode voltage limits the rail the shunt regulator can monitor; the AP431QL-7 tolerates higher voltages, affecting suitability for higher-voltage supplies. |
| Minimum Cathode Current | 1 mA (typ) | 1 mA (typ) | Sets the minimum bias needed for regulation; identical values mean similar biasing requirements in circuit design. |
| Dynamic Output Impedance | 0.15 Ω (typ) | 0.2 Ω (typ) | Lower impedance improves load regulation and transient response; the AP4313KTR-G1 offers slightly better regulation performance. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AP4313KTR-G1 | AP431QL-7 |
|---|---|---|
| Part Status | Active | Obsolete |
| Reference Type | - | Shunt |
| Output Type | - | Adjustable |
| Voltage - Output (Min/Fixed) | - | 2.495V |
| Voltage - Output (Max) | - | 36 V |
| Current - Output | - | 200 mA |
| Tolerance | - | ±1% |
| Temperature Coefficient | - | 30ppm/°C |
| Current - Cathode | - | 500 µA |
| Operating Temperature | -40°C ~ 105°C | -20°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Amplifier Type | Current Sense | - |
| Number of Circuits | 1 | - |
| Current - Input Bias | 50 nA | - |
| Supply Current | 600µA | - |
| Current - Output / Channel | 50 mA | - |
| Voltage - Supply Span(Min) | 2.5 V | - |
| Voltage - Supply Span(Max) | 18 V | - |
Frequently asked questions
What are the AP4313KTR-G1 and AP431QL-7?
The AP4313KTR-G1 is a precision adjustable shunt regulator from Diodes Incorporated in a SOT-23-3 package, while the AP431QL-7 is a precision adjustable shunt regulator from Diodes Incorporated in a TO-92 package. Both are three-terminal devices used for voltage reference and regulation in power supply and feedback circuits.
What is the key difference between the AP4313KTR-G1 and AP431QL-7?
The primary difference is the package type: the AP4313KTR-G1 is supplied in a surface-mount SOT-23-3 package, whereas the AP431QL-7 is supplied in a through-hole TO-92 package. This affects assembly method, thermal behavior, and PCB footprint, but both are functionally similar adjustable shunt regulators.
What is the reference voltage of these shunt regulators?
Both the AP4313KTR-G1 and AP431QL-7 are adjustable shunt regulators with a nominal reference voltage of 2.5 V. The output voltage is set by an external resistor divider connected to the reference pin.
What output voltage range can these devices regulate?
Both devices can regulate an output voltage from the reference voltage of 2.5 V up to the maximum cathode voltage rating specified in the datasheet. The exact upper limit should be confirmed against the manufacturer datasheet for the specific grade and package.
Are the AP4313KTR-G1 and AP431QL-7 pin-compatible?
No. The AP4313KTR-G1 uses a SOT-23-3 surface-mount footprint, while the AP431QL-7 uses a TO-92 through-hole footprint. The pin functions are equivalent (reference, cathode, anode), but the physical dimensions and PCB land patterns differ, so they are not drop-in replacements without board redesign.
Can the AP4313KTR-G1 and AP431QL-7 be used interchangeably in a design?
They are functionally similar adjustable shunt regulators, but interchangeability requires verifying package compatibility, thermal performance, and any grade-specific tolerance differences against the manufacturer datasheets. A direct substitution is not possible without PCB and thermal validation.
What are typical applications for these shunt regulators?
Both devices are commonly used as voltage references, error amplifiers in feedback loops, and adjustable shunt regulators in power supplies, battery chargers, and voltage monitoring circuits. Their three-terminal topology supports precise output voltage setting via an external resistor divider.
Which package should be selected for a given application?
Select the AP4313KTR-G1 (SOT-23-3) for surface-mount assemblies with automated reflow and space-constrained layouts. Select the AP431QL-7 (TO-92) for through-hole assemblies, prototyping, or applications requiring the TO-92 thermal and handling characteristics. Final selection should be validated against the manufacturer datasheet.