Part A
AP4313KTR-G1
Dioden Incorporated
- Lifecycle
- Active
- Stock
- 3607 Stückzahl
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Compatible functional replacement candidate
The AP4313KTR-G1 and AP431ASRG-7 are both adjustable shunt voltage references from the same manufacturer family, sharing a common SOT-23 package and 2.5 V reference architecture. However, they differ in output current capability and reference voltage tolerance grade, so the AP431ASRG-7 can serve as a functional substitute for the AP4313KTR-G1 only after confirming that the tighter tolerance grade and lower current rating satisfy the target design margins.
Package Type
High match
Reference Voltage
High match
Output Current Rating
Validation required
Voltage Tolerance Grade
Validation required
Parts at a glance
Part B
AP431ASRG-7
Dioden Incorporated
- Lifecycle
- Active
- Stock
- 7585 Stückzahl
- Package
- SOT-23R
- Series
- PMIC Spannung Referenz
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 | AP431ASRG-7 | Why it matters |
|---|---|---|---|
| Reference Voltage (Vref) | 1.24 V | 2.5 V | The reference voltage sets the regulated output level; a different Vref means the feedback divider and target output voltage must be redesigned, so the parts are not directly interchangeable. |
| Reference Voltage Tolerance | ±0.5% | ±0.5% | Tolerance determines output accuracy; matching tolerance supports comparable regulation precision in the application. |
| Output Current Capability | 100 mA | 100 mA | Sink current capability defines how much load the shunt regulator can handle; equal ratings allow similar drive of optocouplers or feedback networks. |
| Package / Mounting | SOT-23-3 (Surface Mount) | SOT-23-3 (Surface Mount) | Package and footprint compatibility determine whether the part can drop into the same PCB land pattern without layout changes. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | The temperature range must cover the application environment to ensure reliable regulation and lifetime performance. |
| Supply / Cathode Voltage Range | Up to 18 V | Up to 36 V | Maximum cathode voltage limits the highest rail the regulator can be used on; a lower rating restricts use in higher-voltage feedback loops. |
| Minimum Cathode Current | 1 mA | 1 mA | Minimum operating current defines the lowest bias needed for stable regulation; matching values supports similar biasing schemes. |
| Dynamic Output Impedance | 0.15 Ω (typ) | 0.15 Ω (typ) | Low dynamic impedance improves load regulation and transient response; comparable values indicate similar regulation behavior. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AP4313KTR-G1 | AP431ASRG-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 | - | ±0.5% |
| 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 AP431ASRG-7?
The AP4313KTR-G1 is a precision adjustable shunt regulator from Diodes Incorporated in a SOT-23-3 package, while the AP431ASRG-7 is a precision adjustable shunt regulator from Diodes Incorporated in a SOT-23 package. Both are three-terminal adjustable shunt reference devices used for voltage regulation and reference applications.
What is the output voltage range of each device?
Both the AP4313KTR-G1 and AP431ASRG-7 are adjustable shunt regulators with a reference voltage of 2.5 V and can be programmed to any output voltage from 2.5 V up to 36 V using an external resistor divider.
How do the reference voltage tolerances compare between the two parts?
The AP4313KTR-G1 offers a reference voltage tolerance of ±0.5% at 25°C, while the AP431ASRG-7 offers a reference voltage tolerance of ±1% at 25°C. The AP4313KTR-G1 therefore provides tighter initial accuracy.
Are the package types of the AP4313KTR-G1 and AP431ASRG-7 interchangeable?
Both devices are supplied in SOT-23 three-lead surface-mount packages. The AP4313KTR-G1 is specified as SOT-23-3 and the AP431ASRG-7 as SOT-23; both share the same three-terminal shunt regulator pinout (reference, cathode, anode), but the PCB land pattern and thermal characteristics should be verified against each device's datasheet before substitution.
What are the key electrical specifications shared by both devices?
Both the AP4313KTR-G1 and AP431ASRG-7 are three-terminal adjustable shunt regulators with a 2.5 V reference, an adjustable output range of 2.5 V to 36 V, and a typical operating cathode current range suitable for shunt regulation. Designers should confirm the exact cathode current, dynamic impedance, and temperature coefficient limits from the respective Diodes Incorporated datasheets.
Can the AP4313KTR-G1 directly replace the AP431ASRG-7 in an existing design?
Because both are 2.5 V adjustable shunt regulators in SOT-23 packages with the same pinout, a direct replacement is often possible, but the tighter ±0.5% tolerance of the AP4313KTR-G1 versus the ±1% tolerance of the AP431ASRG-7, along with any differences in cathode current range and dynamic performance, must be validated against the manufacturer datasheets and the target circuit requirements before substitution.
What are typical applications for these shunt regulators?
Both the AP4313KTR-G1 and AP431ASRG-7 are typically used as voltage references, error amplifiers in power supplies, adjustable voltage regulators, and in battery chargers, switch-mode power supplies, and instrumentation circuits where a stable 2.5 V to 36 V reference is required.