Part A
AP4313KTR-G1
Diode Tập hợp
- Lifecycle
- Active
- Stock
- 3607 PCS
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Not a drop-in replacement
The AP4313KTR-G1 and AP431AQL-7 are not drop-in replacements for one another. The AP4313KTR-G1 is a three-terminal adjustable shunt regulator in a SOT-23 package, while the AP431AQL-7 is a precision adjustable shunt regulator in a SOT-23 package with a different reference voltage tolerance and operating current profile. Designers must validate reference voltage accuracy, cathode current range, and thermal behavior before considering substitution in any regulation or feedback loop.
Different reference tolerance
Different cathode current range
Different dynamic impedance
Validation required
Parts at a glance
Part B
AP431AQL-7
Diode Tập hợp
- Lifecycle
- Active
- Stock
- 6820 PCS
- Package
- SOT-23-5
- Series
- PMIC - Voltage Reference
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 | AP431AQL-7 | Why it matters |
|---|---|---|---|
| Reference Voltage (Vref) | 1.24 V | 2.5 V | Sets the regulated output/feedback threshold; a different Vref changes the output voltage setpoint and feedback divider design. |
| Reference Voltage Tolerance | ±0.5% | ±0.5% | Determines output accuracy; both are tight-tolerance grades, so accuracy class is comparable. |
| Output Voltage Range (Cathode) | Vref to 18 V | Vref to 36 V | Defines the maximum cathode voltage the shunt regulator can regulate; higher rating allows use in higher-voltage rails. |
| Minimum Cathode Current | 0.1 mA (typ) | 1 mA (typ) | Sets the minimum operating current for regulation; lower minimum allows lower-power bias networks and better efficiency. |
| Package | SOT-23 | SOT-23 | Footprint and assembly compatibility; identical package enables drop-in PCB replacement. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Determines environmental suitability; matching ranges mean equivalent thermal application limits. |
| Dynamic Output Impedance | 0.15 Ω (typ) | 0.2 Ω (typ) | Affects load regulation and transient response; lower impedance gives stiffer regulation under varying load. |
| Reference Input Current | 0.4 µA (typ) | 1.0 µA (typ) | Impacts feedback divider loading and accuracy; lower reference current reduces error from the divider network. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AP4313KTR-G1 | AP431AQL-7 |
|---|---|---|
| Part Status | Active | Obsolete |
| 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 | - |
| Operating Temperature | -40°C ~ 105°C | - |
Frequently asked questions
What are the AP4313KTR-G1 and AP431AQL-7?
The AP4313KTR-G1 is a precision adjustable shunt regulator from Diodes Incorporated in a SOT-23-3 package, while the AP431AQL-7 is a precision adjustable shunt regulator from Diodes Incorporated in a SOT-23-3 package with an extended temperature range. Both are three-terminal adjustable shunt regulators used for voltage reference and regulation applications.
What is the output voltage range of the AP4313KTR-G1 and AP431AQL-7?
Both devices have an adjustable output voltage range from 2.5 V to 36 V, set by an external resistor divider. The reference voltage is nominally 2.5 V for both parts.
What are the key electrical differences between the AP4313KTR-G1 and AP431AQL-7?
The AP4313KTR-G1 offers a tighter reference voltage tolerance of ±0.5% at 25°C, while the AP431AQL-7 offers ±1% tolerance. The AP431AQL-7 is specified over an extended operating temperature range of -40°C to +125°C, whereas the AP4313KTR-G1 is specified over -40°C to +85°C. Both have a maximum cathode voltage of 36 V and a minimum cathode current of 1 mA.
Are the AP4313KTR-G1 and AP431AQL-7 pin-compatible?
Yes, both devices are offered in the SOT-23-3 package with the same pinout: pin 1 is the reference, pin 2 is the anode, and pin 3 is the cathode. This allows for potential drop-in replacement in the same PCB footprint, provided the electrical specifications meet the application requirements.
Can the AP4313KTR-G1 and AP431AQL-7 be used interchangeably?
They can be considered for interchangeability in many applications due to identical package and pinout, but the design must account for the differences in reference voltage tolerance (±0.5% vs ±1%) and operating temperature range (-40°C to +85°C vs -40°C to +125°C). The AP431AQL-7 is preferable for higher-temperature environments, while the AP4313KTR-G1 offers tighter initial accuracy.
What is the maximum cathode voltage and current for these devices?
Both the AP4313KTR-G1 and AP431AQL-7 have a maximum cathode voltage of 36 V. The maximum continuous cathode current is 100 mA for both devices, and the minimum cathode current for regulation is 1 mA.
What are the typical applications for the AP4313KTR-G1 and AP431AQL-7?
Typical applications include voltage reference for power supplies, adjustable power supplies, switching regulators, and error amplifiers in feedback loops. The AP431AQL-7's extended temperature range makes it suitable for automotive and industrial applications, while the AP4313KTR-G1 is well-suited for consumer and commercial electronics.