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Diodes Incorporated AP7361-25E-13
- Part No.:
- AP7361-25E-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AP7361-25E-13.pdf
- Description:
- IC REG LINEAR 2.5V 1A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:1,161
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Product details
Overview
AP7361-25E-13 from Diodes Incorporated is a 1A fixed-output (2.5V) ultra-low dropout linear regulator with enable, designed for power regulation in space-constrained and battery-sensitive systems. It delivers 2.5V output at up to 1A load with 500mV dropout, 70µA quiescent current, and operates across 2.2V–6V input. Used in FPGA I/O rails, portable audio, and laptop subsystems where stable low-noise voltage and fast transient response are critical.
For engineers reviewing the AP7361-25E-13 datasheet, AP7361-25E-13 pinout, AP7361-25E-13 application, or AP7361-25E-13 equivalent, key selection criteria include dropout voltage at full load, thermal resistance of the SOT223 package (110°C/W), PSRR performance at 1kHz (65dB typical), and compatibility with ≥2.2µF ceramic output capacitors without external compensation.
Technical Context
The AP7361-25E-13 integrates a PMOS pass element, precision 0.8V bandgap reference, and error amplifier for high DC accuracy (±1% at 100mA, ±2% over temperature). Its internal current limit (1.1–1.5A) and thermal shutdown (150°C trip, 20°C hysteresis) operate independently of external components.
It supports active-high enable control but lacks adjustable output capability in the SOT223 package (E suffix), unlike U-DFN3030-8 or SOT89-5 variants. The device achieves very-fast transient response due to optimized internal compensation and remains stable with ceramic output capacitors as low as 2.2µF (10–300mΩ ESR).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1% (at 100mA, +25°C); ensures precise core/I/O rail compliance for 2.5V logic interfaces. |
| Max Output Current | 1.0A continuous; supports high-current digital loads like FPGA I/O banks or USB PHYs without derating at moderate ambient. |
| Dropout Voltage | 500mV at 1A load; enables operation from 3.0V input (e.g., single Li-ion cell with boost stage) while maintaining regulation. |
| Quiescent Current | 70µA typical; minimizes standby power loss in always-on subsystems such as real-time clocks or sensor hubs. |
| PSRR | 65dB at 1kHz; suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Thermal Resistance θJA | 110°C/W (SOT223); requires ≤1.4W max power dissipation (e.g., VIN=4.5V, VOUT=2.5V, IOUT=700mA) to avoid thermal shutdown at +85°C ambient. |
| Operating Temp | −40°C to +85°C ambient; validated for industrial-grade embedded applications including set-top boxes and network edge devices. |
Pinout & Package
SOT223 package (E suffix) with exposed thermal pad; 3-pin configuration (IN, GND, OUT) plus NC terminals - no ADJ or EN pins available in this variant per datasheet Pin Descriptions table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (IN) | Input supply connection | Bypassed with ≥1µF ceramic capacitor; trace must be wide and short to minimize impedance and prevent instability. |
| Pin 2 (GND) | Power ground reference | Connected directly to PCB ground plane; serves as return path for IN, OUT, and thermal pad; critical for PSRR and thermal performance. |
| Pin 3 (OUT) | Regulated output node | Drives load; requires ≥2.2µF ceramic capacitor (10–300mΩ ESR) placed adjacent to pin for stability and transient response. |
| Pin 4 (NC) | No connection | Internally unconnected; must remain floating - not tied to GND or any other net to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 500mV at 1A ensures usable headroom from 3.0V sources (e.g., buck converter output or partially discharged battery). |
| Low quiescent current | 70µA enables >1-year battery life in 10µA standby systems (e.g., IoT sensor nodes with periodic wake-up). |
| High PSRR | 65dB @ 1kHz rejects ripple from noisy switchers, reducing need for additional filtering stages in compact designs. |
| Thermal shutdown | 150°C trip with 20°C hysteresis provides self-protection during overload or poor heatsinking without external circuitry. |
| Ceramic capacitor stability | Stable with ≥2.2µF X5R/X7R ceramics eliminates need for tantalum or electrolytic caps - improves reliability and saves board space. |
Applications
| FPGA I/O Power | Laptop Subsystem Rail |
|---|---|
Use Scenario: Powering 2.5V I/O banks of Xilinx Artix-7 or Intel Cyclone V FPGAs in portable test equipment. IC Role / Device Role / Timing Role: Primary post-regulator delivering clean, low-noise 2.5V to configurable I/O cells requiring tight voltage tolerance and fast load step response. Use Value: Maintains signal integrity during 100mA–1A dynamic I/O switching; 200µs start-up enables rapid reconfiguration without system reset. | Use Scenario: Supplying 2.5V to USB 3.0 controller, PCIe clock buffer, or display interface IC in ultrabook mainboard. IC Role / Device Role / Timing Role: Secondary LDO generating isolated, low-ripple 2.5V rail decoupled from noisy main 3.3V/5V domains. Use Value: 65dB PSRR prevents switching noise from CPU VRMs from corrupting high-speed serial link timing margins. |
| Portable Audio Codec | Industrial Sensor Hub |
Use Scenario: Biasing AK4490EQ or CS43L22 audio DAC/ADC in Bluetooth headphones or smart speakers. IC Role / Device Role / Timing Role: Low-noise analog supply rail ensuring <−105dB THD+N performance and minimal SNR degradation. Use Value: 70µA IQ extends playback time on 200mAh Li-Po batteries; ceramic-capacitor compatibility avoids microphonic effects. | Use Scenario: Powering ADS124S08 precision ADC, BME280 environmental sensor, and nRF52840 MCU in wireless condition-monitoring node. IC Role / Device Role / Timing Role: Single-point regulated 2.5V source for mixed-signal signal chain and RF subsystem requiring stable reference and low EMI. Use Value: −40°C to +85°C rating supports outdoor deployment; thermal shutdown prevents field failure during enclosure overheating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-2502E/MB | 250mA max output, 600mV dropout at 250mA, 2.5µA IQ - lower current, much lower quiescent current. | Suitable only for ultra-low-power sensor nodes (<250mA), not FPGA or audio loads. | Select when battery life dominates over current capacity; avoid for >300mA peak loads. |
| TLS850F2TE/V33 | 500mA max, integrated watchdog and reset generator, AEC-Q100 qualified - automotive-grade with functional safety features. | Targeted at automotive body electronics (e.g., door modules), not consumer portables. | Choose for automotive designs requiring ASIL-B support; overqualified and costlier for industrial use. |
Compared with MCP1703T-2502E/MB and TLS850F2TE/V33, the AP7361-25E-13 uniquely balances 1A output, 500mV dropout, and 70µA IQ in an industrial-temperature SOT223 package - making it optimal for mid-power portable and embedded systems where both current capability and efficiency matter.
Availability
AP7361-25E-13 is available at Aetrix Electronics and suitable for FPGA I/O power, portable audio codec biasing, and industrial sensor hub applications requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for AP7361-25E-13 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.
The AP7361 belongs to Diodes' high-performance LDO portfolio, engineered for low-noise, high-accuracy power regulation in portable, computing, and industrial systems where thermal efficiency and transient response are critical.
FAQ
What is the minimum input voltage required for AP7361-25E-13 to maintain 2.5V output at 1A?
The minimum input voltage is 3.0V: calculated as VOUT + VDROPOUT = 2.5V + 0.5V = 3.0V. At 1A load, dropout is 500mV (typical), and the device guarantees regulation down to this headroom. Input below 3.0V causes output collapse, per Absolute Maximum Ratings and Electrical Characteristics tables.
Can AP7361-25E-13 be used with a 1µF output capacitor?
No - the datasheet specifies ≥2.2µF ceramic output capacitance (10–300mΩ ESR) for guaranteed stability. Using 1µF risks oscillation or poor transient response, especially under load steps. This requirement is explicitly stated in Application Information section on Output Capacitor and confirmed in Typical Performance Characteristics plots.
Does AP7361-25E-13 support enable functionality in the SOT223 package?
No - the SOT223 variant (E suffix) has no EN pin. Pin Descriptions table confirms EN is "NA" for TO252, TO252R, SOT223, and SOT223R packages. Enable is only available in U-DFN3030-8, SOT89-5, and SO-8EP packages. This part operates permanently enabled.
Is AP7361-25E-13 compatible with lead-free reflow profiles?
Yes - it is fully RoHS-compliant and "Green" (halogen- and antimony-free), rated for standard JEDEC J-STD-020 lead-free reflow with peak temperature up to 260°C. The "Totally Lead-Free & Fully RoHS Compliant" statement appears in Features, and MSL rating is not specified but consistent with industry-standard SOT223 moisture sensitivity level 1 handling.
AP7361-25E-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.7V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 90 µA
- Current - Supply (Max):
- -
- PSRR:
- 65dB ~ 45dB (1kHz ~ 10kHz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
AP7361-25E-13 FAQ
1.How can I place an order for AP7361-25E-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7361-25E-13 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AP7361-25E-13 reliable?
The price and inventory of AP7361-25E-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7361-25E-13 is usually 5 days.
3.What payment methods are accepted for AP7361-25E-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7361-25E-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7361-25E-13?
AP7361-25E-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7361-25E-13 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AP7361-25E-13?
For technical support, including AP7361-25E-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7361-25E-13 requirements.
6.How does Aetrix verify that AP7361-25E-13 is sourced from the original manufacturer or authorized distributors?
All AP7361-25E-13 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AP7361-25E-13 meets industry standards.
7.What is the process for return or replacement of AP7361-25E-13?
All AP7361-25E-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7361-25E-13, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AP7361-25E-13 part is unused and in its original packaging.
Return procedure for AP7361-25E-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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