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Diodes Incorporated AP7361-12ER-13
- Part No.:
- AP7361-12ER-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AP7361-12ER-13.pdf
- Description:
- IC REG LINEAR 1.2V 1A SOT223R
- Quantity:
- Payment:
- Shipping:
Inventory:3,987
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Product details
Overview
AP7361-12ER-13 from Diodes Incorporated is a 1A fixed-output (1.2V) ultra-low dropout linear regulator in SOT223R package with enable control, 70µA quiescent current, and thermal shutdown protection. It delivers stable voltage for FPGA I/O rails, portable audio systems, and battery-powered instrumentation where low power loss and fast transient response are critical.
For engineers reviewing the AP7361-12ER-13 datasheet, AP7361-12ER-13 pinout, AP7361-12ER-13 application, or AP7361-12ER-13 equivalent, key selection criteria include dropout voltage at 1A load (500mV), ±1% output accuracy over temperature, EN pin logic thresholds (0.3V/1.0V), ceramic capacitor stability (≥2.2µF), and thermal shutdown threshold (150°C).
Technical Context
The AP7361-12ER-13 implements a PMOS pass transistor architecture enabling 500mV dropout at full 1A load and 150mV at 300mA. 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 (VIH = 1.0V min, VIL = 0.3V max) controlling gate drive to the pass element. Protection circuitry includes foldback current limiting (1.1–1.5A), 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 - ensures reliable core voltage for low-power microcontrollers and sensors. |
| Max Output Current | 1.0A continuous - supports high-current digital I/O domains without external boost circuitry. |
| Dropout Voltage | 500mV at 1A load - enables operation from 1.7V input (e.g., single LiFePO₄ cell) while maintaining regulation. |
| Quiescent Current | 70µA typical - minimizes standby power loss in always-on battery-backed systems. |
| PSRR | 65dB at 1kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Thermal Shutdown | 150°C junction trip with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
| Stability | Guaranteed with ≥2.2µF ceramic output capacitor (10–300mΩ ESR) - eliminates need for electrolytic or tantalum capacitors. |
Pinout & Package
SOT223R package features exposed thermal pad on bottom side for enhanced heat dissipation; pin 1 = GND, pin 2 = OUT, pin 3 = IN. Pin 4 is NC (no connection). Thermal resistance θJA = 110°C/W on standard FR-4 layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Primary return path for load current and internal bias; must connect to low-impedance ground plane. |
| OUT (Pin 2) | Regulated output | Delivers 1.2V to load; requires ≥2.2µF ceramic capacitor placed adjacent to pin for stability and transient response. |
| IN (Pin 3) | Input supply | Accepts 2.2–6.0V input; bypassed with ≥1µF ceramic capacitor close to pin to suppress input ripple and noise. |
| NC (Pin 4) | No connection | Internally unconnected; must remain floating - no external tie or routing required. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 500mV at 1A load enables use with input voltages as low as 1.7V while sustaining full output regulation. |
| Fast start-up time | 200µs typical - allows rapid power sequencing in multi-rail systems and extends battery life in duty-cycled devices. |
| High PSRR | 65dB @ 1kHz improves immunity to noise from switching regulators, reducing need for additional filtering stages. |
| Integrated protection | Current limit (1.1–1.5A), short-circuit clamp (~200mA), and thermal shutdown prevent failure under fault conditions without external components. |
| Ceramic capacitor compatible | Stable with ≥2.2µF X5R/X7R ceramic output cap (10–300mΩ ESR) - lowers BOM cost and improves reliability vs. electrolytics. |
Applications
| Portable Medical Sensors | FPGA I/O Power |
|---|---|
Use Scenario: Wearable ECG monitor powered by single-cell Li-ion battery with dynamic load current from 10mA to 800mA. IC Role / Device Role / Timing Role: Primary 1.2V supply for analog front-end and low-power MCU core, delivering regulated voltage during RF transmission bursts. Use Value: 70µA quiescent current extends battery runtime; 500mV dropout preserves headroom as battery discharges from 4.2V to 3.0V. | Use Scenario: Industrial FPGA development board requiring clean, sequenced 1.2V I/O rail for LVCMOS33-compatible peripherals. IC Role / Device Role / Timing Role: Local point-of-load regulator for FPGA bank powering ADC interfaces and serial transceivers. Use Value: 65dB PSRR at 1kHz attenuates noise from shared 3.3V DC/DC converter, preventing data corruption in high-speed sampling. |
| Smart Home Audio DAC | Automotive Body Control Module |
Use Scenario: Battery-powered smart speaker with Class-D amplifier and high-resolution audio DAC requiring ultra-low-noise 1.2V supply. IC Role / Device Role / Timing Role: Dedicated LDO for DAC reference and analog filter stage, isolated from digital switching noise. Use Value: 200µs start-up enables instant audio playback on wake; ±1% output accuracy maintains THD+N performance across temperature. | Use Scenario: 12V automotive system using buck converter followed by LDO to power LIN transceiver and microcontroller peripherals. IC Role / Device Role / Timing Role: Secondary regulator providing 1.2V for CAN/LIN interface logic and EEPROM backup domain. Use Value: Thermal shutdown (150°C) and current limit protect against sustained overloads in hot under-hood environments. |
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 | 150mA max output, 600mV dropout at 150mA, 2.5µA IQ - lower current, much lower quiescent current. | Suitable only for ultra-low-power microcontroller cores, not for 1A loads like FPGA I/O. | Select when load current ≤150mA and battery life is paramount; not a functional replacement for 1A use cases. |
| TLS850F0TES/V1 | 500mA max, integrated watchdog and reset generator, AEC-Q100 qualified - automotive-grade but lower current rating. | Designed for automotive body electronics with safety monitoring; lacks 1A capability for high-drive I/O rails. | Choose only for AEC-Q100-compliant automotive designs with ≤500mA load; requires redesign for current capacity. |
Compared with MCP1703T-1202E/MB and TLS850F0TES/V1, the AP7361-12ER-13 uniquely combines 1A output, 500mV dropout, and 70µA IQ in a thermally robust SOT223R package - making it optimal for space-constrained industrial and portable systems needing full-load regulation without thermal derating.
Availability
AP7361-12ER-13 is available at Aetrix Electronics and suitable for FPGA power delivery, portable medical instrumentation, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AP7361-12ER-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 ICs for power management, signal integrity, and connectivity applications.
The AP7361 product line targets high-efficiency, low-noise local regulation in portable, industrial, and computing systems - emphasizing ultra-low dropout, fast transient response, and robust fault protection in compact packages.
FAQ
What is the minimum input voltage required for AP7361-12ER-13 to maintain 1.2V output at 1A?
The device requires VIN ≥ VOUT + VDROPOUT = 1.2V + 0.5V = 1.7V minimum. However, per Recommended Operating Conditions, VIN must be ≥2.2V to ensure guaranteed performance across temperature and process variation. Below 2.2V, regulation may degrade or cease.
Can AP7361-12ER-13 operate without an output capacitor?
No. The datasheet mandates a minimum 2.2µF ceramic output capacitor for stability. Omitting it causes oscillation and potential damage. The capacitor must have ESR between 10mΩ and 300mΩ and be placed adjacent to OUT and GND pins.
Is the EN pin internally pulled up or down in AP7361-12ER-13?
There is no internal pull-up or pull-down on the EN pin. If unused, it must be externally tied to IN (not VOUT or GND) to ensure reliable turn-on. Leaving EN floating risks unpredictable operation due to noise coupling.
Does AP7361-12ER-13 support adjustable output voltage?
No. The "-12" suffix denotes a factory-trimmed fixed 1.2V output. Adjustable versions (e.g., AP7361ADJ) exist but require different part numbers and are only offered in U-DFN3030-8 and SOT89-5 packages - not SOT223R.
AP7361-12ER-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-223R
AP7361-12ER-13 FAQ
1.How can I place an order for AP7361-12ER-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7361-12ER-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 AP7361-12ER-13 reliable?
The price and inventory of AP7361-12ER-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7361-12ER-13 is usually 5 days.
3.What payment methods are accepted for AP7361-12ER-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7361-12ER-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7361-12ER-13?
AP7361-12ER-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7361-12ER-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 AP7361-12ER-13?
For technical support, including AP7361-12ER-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7361-12ER-13 requirements.
6.How does Aetrix verify that AP7361-12ER-13 is sourced from the original manufacturer or authorized distributors?
All AP7361-12ER-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 AP7361-12ER-13 meets industry standards.
7.What is the process for return or replacement of AP7361-12ER-13?
All AP7361-12ER-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7361-12ER-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 AP7361-12ER-13 part is unused and in its original packaging.
Return procedure for AP7361-12ER-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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