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Diodes Incorporated AP7361-12E-13
- Part No.:
- AP7361-12E-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AP7361-12E-13.pdf
- Description:
- IC REG LINEAR 1.2V 1A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:4,272
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Product details
Overview
AP7361-12E-13 from Diodes Incorporated is a 1A fixed-output low-dropout linear regulator with 1.2V output, enable control, and ultra-low 500mV dropout at full load. It features 70µA typical quiescent current, ±1% output voltage accuracy, and thermal shutdown protection. Designed for FPGA I/O power, battery-powered devices, and audio subsystems requiring stable, low-noise 1.2V supply.
For engineers reviewing the AP7361-12E-13 datasheet, AP7361-12E-13 pinout, AP7361-12E-13 application, or AP7361-12E-13 equivalent, key selection criteria include dropout performance at 1A, EN pin logic thresholds (VIH = 1.0V, VIL = 0.3V), ceramic capacitor stability (≥2.2µF), and thermal resistance (θJA = 110°C/W in SOT223 package).
Technical Context
The AP7361-12E-13 implements a PMOS pass transistor architecture enabling ultra-low dropout (150mV @ 300mA, 500mV @ 1A) and high PSRR (65dB @ 1kHz). Its internal 0.8V bandgap reference feeds an error amplifier that regulates output via feedback from the fixed 1.2V divider network embedded in the die.
Enable functionality is implemented as a logic-level input (EN pin, Pin 2) with active-high control and sub-1µA shutdown current. Protection circuitry includes foldback current limiting (1.1–1.5A trip), short-circuit clamping (~200mA), and thermal shutdown with 20°C hysteresis (150°C trip, 130°C recovery).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±1% over -40°C to +85°C ambient; enables precise core voltage for low-power microcontrollers. |
| Max Output Current | 1.0A continuous; supports high-current digital loads like FPGA I/O banks without external boost stages. |
| Dropout Voltage | 500mV @ 1A load; allows operation from 1.7V input (e.g., single LiFePO₄ cell or buck-boost pre-regulator). |
| Quiescent Current | 70µA typical enabled; minimizes standby power loss in always-on battery systems (e.g., IoT sensors). |
| PSRR | 65dB @ 1kHz, 45dB @ 10kHz; suppresses switching noise from upstream DC/DC converters feeding sensitive analog circuits. |
| Thermal Shutdown | 150°C junction trip with 20°C hysteresis; prevents permanent damage during transient overload or poor PCB heatsinking. |
| Stability | Guaranteed with ≥2.2µF ceramic output capacitor (ESR 10–300mΩ); eliminates need for electrolytic or tantalum capacitors. |
Pinout & Package
AP7361-12E-13 is packaged in SOT223 (lead-free, RoHS-compliant), featuring a thermally enhanced 3-pin configuration with exposed thermal pad connected to GND. The package provides θJA = 110°C/W on standard FR-4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (IN) | Input voltage supply | Accepts 2.2V–6.0V; requires ≥1µF ceramic bypass to GND placed adjacent to pin for noise immunity. |
| Pin 2 (EN) | Enable control input | Active-high logic: drives high (>1.0V) to enable regulation; pulls low (<0.3V) for <1µA shutdown current. |
| Pin 3 (OUT) | Regulated output | Delivers 1.2V ±1%; must connect ≥2.2µF ceramic capacitor directly between OUT and GND for stability. |
| Exposed Pad (GND) | Power ground and thermal path | Internally tied to GND; soldered to PCB copper pour for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 500mV @ 1A ensures usable headroom from 1.7V input sources-critical for single-cell battery systems. |
| Low quiescent current | 70µA typical enables >1-year battery life in 10µA average-load IoT nodes powered by CR2032 cells. |
| Fast transient response | 200µs startup time and rapid load-step recovery minimize voltage droop during processor wake-up events. |
| Integrated protection | Current limit + thermal shutdown + short-circuit clamp eliminate need for external fault management circuitry. |
| Ceramic capacitor compatibility | Stable with ≥2.2µF X5R/X7R ceramics simplifies BOM, reduces footprint, and improves reliability vs. electrolytics. |
Applications
| FPGA I/O Power Supply | Battery-Powered Medical Sensors |
|---|---|
Use Scenario: Providing clean, regulated 1.2V to FPGA I/O banks in portable test equipment with tight thermal constraints. IC Role / Device Role / Timing Role: Primary LDO delivering stable I/O rail; handles dynamic current steps up to 800mA during data transmission bursts. Use Value: 500mV dropout enables direct regulation from 2.0V buck converter output, reducing system component count and board area. |
Use Scenario: Powering ultra-low-power ECG front-end ASICs in disposable wearable patches operating from coin-cell batteries. IC Role / Device Role / Timing Role: Always-on voltage regulator maintaining 1.2V for analog signal chain; activated only during periodic 10-second measurement windows. Use Value: 70µA quiescent current extends CR2032 battery life beyond 18 months while meeting medical-grade voltage accuracy (±1%). |
| Industrial PLC Digital Input Modules | Audio DAC Reference Supply |
Use Scenario: Generating isolated 1.2V logic supply for optocoupler-driven digital input interfaces in 24V-powered programmable logic controllers. IC Role / Device Role / Timing Role: Secondary LDO post-isolation; supplies level-shifted control signals to microcontroller GPIOs under noisy factory EMI conditions. Use Value: 65dB PSRR at 1kHz rejects conducted noise from 24V bus transients, preventing false triggering of input latches. |
Use Scenario: Delivering ultra-low-noise 1.2V reference voltage to stereo audio DACs in premium Bluetooth speakers with Class-D amplifiers. IC Role / Device Role / Timing Role: Precision analog supply rail decoupled from noisy digital domains; operates continuously during playback. Use Value: Stable 1.2V output with <±130ppm/°C drift ensures consistent DAC full-scale voltage across temperature, preserving THD+N performance. |
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-1202E/MB | 1.2V fixed, 250mA max, 600mV dropout @ 250mA, higher IQ (2.5µA) | Limited to low-current logic rails; insufficient for 1A FPGA I/O loads | Select only for space-constrained, sub-300mA applications where ultra-low IQ dominates requirements |
| TPS7A2012PDBVR | 1.2V fixed, 300mA max, 175mV dropout @ 300mA, 6.5µA IQ, smaller DFN package | Lower current rating and different thermal profile; not drop-in for 1A designs | Prefer for portable consumer electronics needing minimal footprint and lowest possible IQ, but verify load headroom |
Compared with AP7361-12E-13, MCP1703T-1202E/MB and TPS7A2012PDBVR offer lower quiescent current but lack the 1A capability and thermal robustness required for industrial FPGA or PLC applications-making AP7361-12E-13 the only viable choice for high-current, thermally demanding deployments.
Availability
AP7361-12E-13 is available at Aetrix Electronics and suitable for FPGA I/O power, battery-powered medical sensors, and industrial PLC digital input modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP7361-12E-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial and consumer markets.
The AP7361 series belongs to Diodes' precision LDO portfolio, engineered specifically for high-current, low-noise applications in battery-powered and thermally constrained systems where dropout voltage and quiescent current are critical.
FAQ
What is the minimum input voltage required for AP7361-12E-13 to maintain regulation at 1A?
The device requires VIN ≥ VOUT + VDROPOUT = 1.2V + 0.5V = 1.7V minimum. However, the absolute minimum specified input is 2.2V per datasheet-this accounts for line regulation, tolerance stack-up, and transient margin. Operating below 2.2V risks loss of regulation during load transients or temperature extremes.
Can AP7361-12E-13 be used with a 1µF output capacitor?
No. The datasheet mandates ≥2.2µF ceramic output capacitance (10–300mΩ ESR) for guaranteed stability. Using 1µF violates the stability condition and may cause oscillation or excessive overshoot during load steps, especially above 100mA. A 2.2µF or 4.7µF X5R ceramic is recommended.
Is the EN pin internally pulled up or down?
The EN pin has no internal pull-up or pull-down resistor. It must be actively driven: connect to VIN through a resistor for always-on operation, or interface with a microcontroller GPIO. Leaving it floating risks undefined behavior due to noise coupling, potentially causing erratic enable/disable cycling.
Does AP7361-12E-13 support adjustable output voltage?
No. AP7361-12E-13 is a fixed 1.2V output variant in SOT223 package. Adjustable operation is only available in U-DFN3030-8 and SOT89-5 packages (e.g., AP7361-ADJ). The SOT223 and SO-8EP variants have internal feedback resistors and do not expose the ADJ pin.
AP7361-12E-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):
- 1.2V
- 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
AP7361-12E-13 FAQ
1.How can I place an order for AP7361-12E-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7361-12E-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 AP7361-12E-13 reliable?
The price and inventory of AP7361-12E-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7361-12E-13 is usually 5 days.
3.What payment methods are accepted for AP7361-12E-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7361-12E-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7361-12E-13?
AP7361-12E-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7361-12E-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 AP7361-12E-13?
For technical support, including AP7361-12E-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7361-12E-13 requirements.
6.How does Aetrix verify that AP7361-12E-13 is sourced from the original manufacturer or authorized distributors?
All AP7361-12E-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 AP7361-12E-13 meets industry standards.
7.What is the process for return or replacement of AP7361-12E-13?
All AP7361-12E-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7361-12E-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 AP7361-12E-13 part is unused and in its original packaging.
Return procedure for AP7361-12E-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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