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 AP431QG-7 are both adjustable shunt voltage references from Diodes Incorporated sharing a 2.5 V reference and SOT-23 package family, but they differ in pinout, reference tolerance grade, and package suffix. The AP431QG-7 is a viable functional substitute for the AP4313KTR-G1 only after confirming pin assignment, tolerance requirements, and thermal layout on the target board.
Reference Voltage
Validation required
Package Type
Validation required
Pin Configuration
Not compatible
Reference Tolerance
Validation required
Parts at a glance
Part B
AP431QG-7
Dioden Incorporated
- Lifecycle
- Active
- Stock
- 7802 Stückzahl
- Package
- SOT-23-5
- 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 | AP431QG-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 substitutable. |
| Reference Voltage Tolerance | ±0.5% | ±0.5% | Tolerance determines output accuracy; both are ±0.5%, so accuracy class is equivalent and does not block substitution. |
| Output Voltage Range | Vref to 18 V (adjustable) | Vref to 36 V (adjustable) | The maximum regulated voltage limits the application range; the lower 18 V ceiling of the AP4313KTR-G1 restricts use in higher-voltage rails. |
| Output Current Capability | 100 mA | 100 mA | Sink current capability affects drive strength for optocouplers and feedback loops; equal ratings mean comparable drive performance. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | The temperature range defines environmental robustness; identical ranges mean both suit the same thermal environments. |
| Package / Mounting | SOT-23-3 (surface mount) | SOT-23-3 (surface mount) | Package and footprint determine PCB layout compatibility; matching SOT-23-3 packages allow drop-in board placement. |
| Supply / Cathode Voltage (max) | 18 V | 36 V | Maximum cathode voltage limits the rail the shunt regulator can sit on; the lower 18 V rating of the AP4313KTR-G1 constrains higher-voltage designs. |
| Minimum Cathode Current | 1 mA (typ) | 1 mA (typ) | Minimum operating current sets the bias resistor sizing for regulation; equal values mean similar biasing requirements. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AP4313KTR-G1 | AP431QG-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 AP431QG-7?
The AP4313KTR-G1 is a precision adjustable shunt regulator from Diodes Incorporated in a SOT-23-3 package, while the AP431QG-7 is a precision adjustable shunt regulator from Diodes Incorporated in a SOT-23-3 package. Both are three-terminal adjustable shunt regulators intended for voltage reference and regulation applications.
What is the output voltage range of these devices?
Both the AP4313KTR-G1 and AP431QG-7 are adjustable shunt regulators with a reference voltage of 2.5 V and an adjustable output voltage range from 2.5 V up to 36 V, set by an external resistor divider.
What is the reference voltage tolerance of each part?
The AP4313KTR-G1 offers a reference voltage tolerance of ±0.5% at 25°C, while the AP431QG-7 offers a reference voltage tolerance of ±1% at 25°C. Designers should select based on the required initial accuracy for the target application.
What package do these regulators use and are they pin-compatible?
Both the AP4313KTR-G1 and AP431QG-7 are supplied in the SOT-23-3 package with the same three-terminal pinout (reference, anode, cathode). The package and pinout are compatible, but the electrical tolerance difference must be validated before substitution.
What are the key operating current and temperature specifications?
Both devices operate with a cathode current range suitable for shunt regulation and are rated for operation over the industrial temperature range of -40°C to +85°C. The AP4313KTR-G1 and AP431QG-7 share the same 2.5 V reference and 36 V maximum cathode voltage rating.
Can the AP4313KTR-G1 and AP431QG-7 be used interchangeably in a design?
Because both are 2.5 V adjustable shunt regulators in the same SOT-23-3 package with the same pinout, they are functionally similar. However, the AP4313KTR-G1 provides ±0.5% reference tolerance versus ±1% for the AP431QG-7, so substitution should be validated against the accuracy requirements of the target circuit.
What applications are these shunt regulators typically used in?
Both the AP4313KTR-G1 and AP431QG-7 are used as voltage references and error amplifiers in power supplies, as adjustable shunt regulators in SMPS feedback loops, and in voltage monitoring and precision current regulation circuits where a 2.5 V reference with adjustable output up to 36 V is required.