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Diodes Incorporated AP7361EA-18E-13
- Part No.:
- AP7361EA-18E-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
AP7361EA-18E-13.pdf
- Description:
- LDO CMOS HICURR SOT223 T&R 2.5K
- Quantity:
- Payment:
- Shipping:
Inventory:2,367
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Product details
Overview
AP7361EA-18E-13 from Diodes Incorporated is a 1A, fixed-output (1.8V), ultra-low dropout linear regulator in SOT223 package with enable input, ±1% output accuracy, 360mV dropout at 1A (for 3.3V version), and 68µA typical quiescent current-designed for stable power delivery in battery-powered audio/video equipment and LCD monitors.
For engineers reviewing the AP7361EA-18E-13 datasheet, AP7361EA-18E-13 pinout, AP7361EA-18E-13 application, or AP7361EA-18E-13 equivalent, key selection criteria include dropout voltage at 1A load, EN logic thresholds (VIH = 1.0V min), thermal shutdown threshold (150°C), PSRR (75dB @ 1kHz), and compatibility with ≥2.2µF MLCC output capacitors.
Technical Context
The AP7361EA-18E-13 implements a PMOS pass transistor architecture enabling ultra-low dropout operation and high PSRR. Its internal 0.8V bandgap reference feeds an error amplifier that regulates output via feedback from the ADJ/NC pin (unused in fixed 1.8V variant) or internal resistor divider.
Enable control is implemented with active-high EN pin (VIH ≥ 1.0V, VIL ≤ 0.3V) and 3.0MΩ internal pull-down resistor. Protection functions include foldback short-circuit limiting (400mA), thermal shutdown (150°C trip, 20°C hysteresis), and current limit (1.5A).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% - ensures precise rail generation for 1.8V logic and interface ICs without external resistors. |
| Max Output Current | 1.0A continuous - supports moderate-power loads like display bias, audio amplifiers, or microcontroller cores. |
| Dropout Voltage | 360mV typical at 1A (for 3.3V version); for 1.8V output: ~400mV at 1A - enables operation from 2.2V input, critical for single-cell Li-ion or dual-cell alkaline systems. |
| Quiescent Current | 68µA typical - minimizes standby power loss in always-on subsystems such as remote control receivers or sensor wake-up circuits. |
| PSRR | 75dB @ 1kHz - suppresses switching noise from upstream DC-DC converters, improving signal integrity in analog/audio paths. |
| Thermal Shutdown | 150°C junction temperature - protects against sustained overload or poor PCB thermal design while allowing safe restart at ~130°C. |
| Input Voltage Range | 2.2V to 6.0V - accommodates wide-input sources including USB ports, multi-cell batteries, and post-regulated supplies. |
Pinout & Package
SOT223 package (3-pin, exposed thermal pad) with standard pinout: Pin 1 = IN, Pin 2 = GND, Pin 3 = OUT. The exposed pad (EP) must be connected to PCB ground plane via thermal vias for optimal thermal performance (θJA = 110°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator input | Accepts 2.2–6.0V; requires ≥1µF ceramic bypass capacitor placed adjacent to pin for stability and noise rejection. |
| 2 (GND) | Ground reference | Common return path for input/output currents and internal circuitry; must be low-impedance connection to minimize noise coupling. |
| 3 (OUT) | Regulated output | Delivers stable 1.8V; requires ≥2.2µF ceramic output capacitor for loop stability and transient response. |
| EP (Exposed Pad) | Thermal dissipation node | Not electrically functional; must be soldered to large copper area tied to GND for thermal management-critical to avoid thermal shutdown at full load. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | Enables 1.8V output from 2.2V input (400mV headroom), extending battery runtime in portable devices. |
| Enable control | Active-high EN pin (VIH ≥ 1.0V) allows system-level power sequencing and deep-sleep mode control. |
| Foldback short-circuit protection | Limits fault current to ~400mA during output short, preventing thermal runaway and enabling safe auto-recovery. |
| Stable with low-ESR capacitors | Operates reliably with ≥2.2µF MLCC, tantalum, or polymer capacitors-reducing BOM cost and board space vs. electrolytic solutions. |
| High PSRR | 75dB rejection at 1kHz isolates sensitive analog circuits (e.g., ADC references, audio DACs) from noisy supply rails. |
Applications
| Portable Audio Amplifiers | LCD Monitor Bias Rails |
|---|---|
Use Scenario: Powering Class AB/D audio amplifier ICs in Bluetooth speakers and portable soundbars requiring clean, low-noise 1.8V supply for digital control logic and I²S interfaces. IC Role / Device Role / Timing Role: Primary low-noise LDO delivering regulated 1.8V rail with fast transient response to handle dynamic audio load steps. Use Value: 68µA quiescent current extends battery life during playback pauses; 75dB PSRR prevents audible switching noise coupling into audio signal path. | Use Scenario: Generating stable 1.8V supply for timing controllers and interface logic in 24–32-inch LCD monitors powered from 5V or 12V DC adapters. IC Role / Device Role / Timing Role: Secondary LDO providing isolated, low-ripple power for LVDS transmitter ICs and microcontroller peripherals. Use Value: ±1% output accuracy ensures reliable I²C/SPI communication; 1A rating supports simultaneous operation of multiple display sub-systems. |
| Set-Top Box SoC I/O Rails | Smart Home Sensor Hubs |
Use Scenario: Supplying 1.8V I/O domain for media processor SoCs (e.g., ARM-based video decoders) in cable/satellite set-top boxes with variable thermal environments. IC Role / Device Role / Timing Role: Fixed-voltage LDO with thermal shutdown protecting SoC I/O banks during extended operation in enclosed enclosures. Use Value: 150°C thermal shutdown + 20°C hysteresis prevents permanent damage during ambient temperature spikes; SOT223 package enables compact layout near SoC. | Use Scenario: Powering ultra-low-power wireless sensor nodes (Zigbee/Thread) with integrated 1.8V MCU, RF transceiver, and environmental sensors. IC Role / Device Role / Timing Role: Always-on LDO maintaining regulated 1.8V during sleep modes and enabling rapid wake-up via EN pin control. Use Value: Enable pin allows host MCU to disable regulator during deep sleep, reducing system-wide leakage to <1µA; 68µA IQ preserves battery for >1-year operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-1802E/TO | 250mA max output, 6µA IQ, SOT23-3 package - lower current, much lower quiescent current. | Only suitable for sub-250mA loads; lacks EN pin and thermal shutdown. | Select only for ultra-low-power, low-current sensor nodes where 1A capability is unnecessary. |
| TLS850F1BTV50 | Automotive-grade (AEC-Q100), 500mA, integrated watchdog and reset - higher reliability, lower current, different feature set. | Designed for automotive body electronics; includes safety features not needed in consumer displays. | Choose only if AEC-Q100 qualification and functional safety support are mandatory requirements. |
Compared with MCP1700-1802E/TO and TLS850F1BTV50, the AP7361EA-18E-13 uniquely balances 1A output, 68µA IQ, EN control, and thermal protection in a cost-effective SOT223 package-making it optimal for mid-power consumer electronics where both performance and BOM simplicity matter.
Availability
AP7361EA-18E-13 is available at Aetrix Electronics and suitable for LCD monitor bias rails, portable audio amplifier supplies, set-top box SoC I/O domains, and smart home sensor hubs requiring stable component supply across production volumes.
Supply support for AP7361EA-18E-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 manufacturer specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.
The AP7361EA belongs to Diodes' high-performance LDO regulator product line, engineered for low-noise, low-dropout power delivery in space-constrained, thermally demanding consumer and industrial systems.
FAQ
What is the minimum input voltage required for stable 1.8V output at 1A load?
The AP7361EA-18E-13 requires VIN ≥ 2.2V per datasheet specifications. At 1A load, measured dropout is ~400mV for 1.8V output, so minimum functional input is 2.2V. Operation below 2.2V risks regulation loss and increased output ripple.
Can the EN pin be left floating, or must it be tied high?
The EN pin must not be left floating-it has a 3.0MΩ internal pull-down resistor but lacks sufficient noise immunity for reliable operation. For fixed-enable use, tie EN directly to IN; for controlled sequencing, drive with a clean logic signal meeting VIH ≥ 1.0V and VIL ≤ 0.3V.
Is the SOT223 package thermally adequate for 1A continuous operation at 85°C ambient?
Yes, when the exposed pad is properly soldered to ≥1 cm² copper area with ≥4 thermal vias to inner ground planes, θJA drops to ~110°C/W. With VIN = 3.3V and VOUT = 1.8V, PD = 1.5W → ΔT = 165°C, so derating to ≤700mA at 85°C ambient is recommended for long-term reliability.
Does the AP7361EA-18E-13 require an external output capacitor, and what type is recommended?
Yes-a minimum 2.2µF ceramic capacitor is required between OUT and GND for stability. X5R or X7R MLCCs are preferred due to low ESR and stable capacitance over temperature; tantalum or polymer capacitors may also be used if ESR is ≤100mΩ.
AP7361EA-18E-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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 91 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Current Limit
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
AP7361EA-18E-13 FAQ
1.How can I place an order for AP7361EA-18E-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7361EA-18E-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 AP7361EA-18E-13 reliable?
The price and inventory of AP7361EA-18E-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7361EA-18E-13 is usually 5 days.
3.What payment methods are accepted for AP7361EA-18E-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7361EA-18E-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7361EA-18E-13?
AP7361EA-18E-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7361EA-18E-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 AP7361EA-18E-13?
For technical support, including AP7361EA-18E-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7361EA-18E-13 requirements.
6.How does Aetrix verify that AP7361EA-18E-13 is sourced from the original manufacturer or authorized distributors?
All AP7361EA-18E-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 AP7361EA-18E-13 meets industry standards.
7.What is the process for return or replacement of AP7361EA-18E-13?
All AP7361EA-18E-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7361EA-18E-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 AP7361EA-18E-13 part is unused and in its original packaging.
Return procedure for AP7361EA-18E-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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