Part A
AP4313KTR-G1
Diode Tập hợp
- Lifecycle
- Active
- Stock
- 3607 PCS
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AP4313KTR-G1 and AP431SRG-7 are both adjustable shunt voltage references from Diodes Incorporated sharing the same SOT-23 package and 2.5 V to 36 V cathode voltage range, making them functionally comparable in many regulation and feedback circuits. However, the AP4313KTR-G1 offers a tighter reference tolerance grade and a wider operating temperature range than the AP431SRG-7, so designers should validate accuracy budget and thermal margin before substituting one for the other in precision applications.
Reference Voltage Tolerance
High match
Package Type
High match
Operating Temperature Range
Validation required
Cathode Current Range
Validation required
Parts at a glance
Part B
AP431SRG-7
Diode Tập hợp
- Lifecycle
- Active
- Stock
- 7469 PCS
- Package
- SOT-23-3
- 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 | AP431SRG-7 | Why it matters |
|---|---|---|---|
| Reference Voltage (Vref) | 1.24 V | 2.495 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 withstand; affects suitability for higher-voltage rails. |
| Minimum Cathode Current | 0.1 mA (typ) | 1 mA (typ) | Sets the minimum operating current for regulation; lower minimum current allows lower-power bias networks. |
| Package | SOT-23-3 | SOT-23-3 | Footprint and pinout compatibility; identical package supports drop-in board replacement. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +85°C | Determines environmental robustness; the wider range part suits harsher or higher-power-dissipation applications. |
| Dynamic Output Impedance | 0.15 Ω (typ) | 0.2 Ω (typ) | Affects regulation stiffness and transient response; lower impedance gives tighter regulation under load changes. |
| Reference Input Current | 0.4 µA (typ) | 1.5 µA (typ) | Influences feedback divider loading and output error; lower input current reduces error contribution in high-impedance dividers. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AP4313KTR-G1 | AP431SRG-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 AP431SRG-7?
The AP4313KTR-G1 is a precision adjustable shunt regulator from Diodes Incorporated in a SOT-23-3 package, while the AP431SRG-7 is a precision adjustable shunt regulator from Diodes Incorporated in a SOT-23 package. Both are three-terminal adjustable shunt reference devices commonly used for voltage regulation and reference applications.
What is the output voltage range of these shunt regulators?
Both the AP4313KTR-G1 and AP431SRG-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, per Diodes Incorporated datasheet specifications.
What package types do the AP4313KTR-G1 and AP431SRG-7 use?
The AP4313KTR-G1 is supplied in a SOT-23-3 package, and the AP431SRG-7 is supplied in a SOT-23 package. Both are surface-mount three-terminal packages, but the specific package suffix and pin configuration should be verified against the respective datasheets before layout or substitution.
What are the key electrical differences between the AP4313KTR-G1 and AP431SRG-7?
Both devices are 2.5 V adjustable shunt regulators with a 36 V maximum cathode voltage and similar reference voltage tolerance grades. The primary differences lie in package designation, ordering suffix, and the specific tolerance grade and temperature characteristics documented in each device's datasheet. Designers should compare the reference voltage tolerance, cathode current range, and operating temperature range from the official Diodes Incorporated datasheets before selecting between them.
Can the AP4313KTR-G1 and AP431SRG-7 be used interchangeably?
Interchangeability depends on the specific tolerance grade, package footprint, and thermal requirements of the target design. Because both are 2.5 V adjustable shunt regulators with a 36 V maximum rating, they are functionally similar, but the designer must verify pinout, reference voltage tolerance, and operating temperature range against the official datasheets before substituting one for the other.
What are typical applications for these shunt regulators?
Both the AP4313KTR-G1 and AP431SRG-7 are typically used as voltage references in power supplies, as error amplifiers in switching regulators, in adjustable voltage and current regulation circuits, and in battery chargers and adapters, consistent with the application notes in the Diodes Incorporated datasheets.
What is the maximum cathode voltage and operating temperature range for these devices?
Per Diodes Incorporated datasheet specifications, both the AP4313KTR-G1 and AP431SRG-7 have a maximum cathode voltage of 36 V. The operating temperature range should be confirmed from each device's datasheet, as the specified grade may differ between the two part numbers.