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Diodes Incorporated AP7361EA-18SP-13
- Part No.:
- AP7361EA-18SP-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AP7361EA-18SP-13.pdf
- Description:
- LDO CMOS HICURR SO-8EP T&R 2.5K
- Quantity:
- Payment:
- Shipping:
Inventory:3,179
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Product details
Overview
AP7361EA-18SP-13 from Diodes Incorporated is a 1A, fixed-output (1.8V), ultra-low dropout linear regulator with enable function in SO-8EP package. It delivers ±1% output voltage accuracy, 360mV dropout at 1A (for 3.3V version; 1.8V dropout is 400mV typ), and 68µA quiescent current, enabling stable power for noise-sensitive analog rails in LCD TVs and set-top boxes.
For engineers reviewing the AP7361EA-18SP-13 datasheet, AP7361EA-18SP-13 pinout, AP7361EA-18SP-13 application, or AP7361EA-18SP-13 equivalent, key selection criteria include dropout performance at 1.8V/1A, EN logic thresholds (VIH = 1.0V min), thermal resistance (θJA = 100°C/W), and compatibility with 2.2µF MLCC output capacitors.
Technical Context
The AP7361EA-18SP-13 integrates a PMOS pass transistor, precision 0.8V bandgap reference, error amplifier, and foldback current limiting. Its architecture enables stable regulation down to 2.2V input while maintaining low dropout and high PSRR (75dB @ 1kHz).
Enable control is implemented via a dedicated EN pin with 1.0V minimum VIH and 0.3V maximum VIL, supporting direct interfacing with 1.8V/3.3V logic. Thermal shutdown activates at ~150°C with 20°C hysteresis, and short-circuit protection limits output to 400mA under fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% - ensures precise biasing for 1.8V I/O domains and low-voltage microcontrollers. |
| Max Output Current | 1.0A continuous - supports moderate-power digital subsystems without external current boosting. |
| Dropout Voltage | 400mV typical at 1A (1.8V out) - allows operation from 2.2V input, critical for single-cell Li-ion or 3.3V rail derivation. |
| Quiescent Current | 68µA typical - minimizes standby power loss in always-on audio/video subsystems. |
| PSRR | 75dB @ 1kHz - suppresses switching noise from upstream DC/DC converters feeding sensitive analog circuitry. |
| Thermal Shutdown | 150°C threshold with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
| Input Voltage Range | 2.2V to 6.0V - accommodates wide-input applications including USB-powered devices and multi-rail systems. |
Pinout & Package
AP7361EA-18SP-13 uses the SO-8EP (exposed pad) thermally enhanced package. The exposed pad must be connected to GND or large copper pour for optimal thermal dissipation (θJA = 100°C/W, θJC = 28.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN | Regulator input; requires ≥1µF ceramic bypass capacitor placed adjacent to pin for stability and noise rejection. |
| 2 | GND | Power ground reference; connects to PCB ground plane and exposed pad for thermal path. |
| 3 | ADJ/NC | No connection in fixed 1.8V version; left floating or tied to GND per layout best practice. |
| 4 | IN | Second input terminal; electrically tied to Pin 1 internally; used for high-current routing in SO-8EP layout. |
| 5 | EN | Active-high enable; logic-high ≥1.0V turns regulator on; logic-low ≤0.3V disables output and reduces IQ to 0.05µA. |
| 6 | OUT | Regulated 1.8V output; requires ≥2.2µF ceramic capacitor with low ESR for transient response and stability. |
| 7 | NC | No internal connection; must remain unconnected to avoid parasitic coupling or latch-up risk. |
| 8 | GND | Secondary ground terminal; ties to same ground net as Pin 2 and exposed pad for low-impedance return path. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 400mV at 1A (1.8V output) - enables efficient regulation from 2.2V sources, extending battery runtime in portable AV gear. |
| High PSRR | 75dB @ 1kHz - isolates downstream analog circuits (e.g., audio DACs, video DACs) from noisy DC/DC ripple. |
| Foldback short-circuit protection | Clamps output to 400mA during hard shorts - prevents thermal runaway while allowing safe recovery when fault clears. |
| Stable with low-ESR capacitors | Works with ≥2.2µF MLCC, tantalum, or polymer caps - eliminates need for specialized compensation networks. |
| Wide ambient temperature range | -40°C to +85°C - supports deployment in consumer electronics operating in uncontrolled environments (e.g., living room set-top boxes). |
Applications
| LCD TV Power Management | Set-Top Box Core Logic Supply |
|---|---|
|
Use Scenario: Providing clean 1.8V supply to HDMI receiver ICs and video processing SoCs in LCD TVs. IC Role / Device Role / Timing Role: Low-noise post-regulator delivering stable voltage to high-speed digital interfaces requiring tight voltage tolerance. Use Value: 75dB PSRR suppresses 1MHz–10MHz switching noise from upstream buck converters, preventing HDMI link errors and pixel corruption. |
Use Scenario: Powering ARM-based application processors and DDR memory I/O rails in cable/satellite set-top boxes. IC Role / Device Role / Timing Role: Fixed-output LDO supplying regulated 1.8V to processor I/O banks with fast load transient response. Use Value: 200µs startup time and 400mV dropout allow immediate wake-from-standby operation without brownout, improving remote responsiveness. |
| Smart Home Audio Amplifier Bias | Industrial Display Controller Rail |
|
Use Scenario: Generating 1.8V bias for Class-D amplifier input stages and DSP peripherals in Wi-Fi-enabled smart speakers. IC Role / Device Role / Timing Role: Low-quiescent-current regulator maintaining always-on audio subsystem readiness. Use Value: 68µA IQ enables >1-year battery life in backup-supplied audio monitoring circuits without compromising signal integrity. |
Use Scenario: Supplying 1.8V to FPGA configuration I/O and touch controller interfaces in ruggedized industrial HMIs. IC Role / Device Role / Timing Role: Thermally robust LDO with exposed-pad SO-8EP package ensuring reliability across -40°C to +85°C ambient. Use Value: θJA = 100°C/W and thermal shutdown at 150°C prevent field failures in enclosed enclosures with limited airflow. |
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 |
|---|---|---|---|
| MCP1703T-1802E/MB | 0.25A max output, 600mV dropout at 250mA, 2.5µA IQ - lower current, higher dropout, much lower quiescent current. | Suitable only for ultra-low-power MCU peripherals; cannot replace AP7361EA-18SP-13 in 1A load scenarios. | Select only if load current <250mA and standby IQ <3µA is mandatory; not a functional replacement for 1A use cases. |
| Torex XC6210B182MR-G | 1A output, 250mV dropout at 1A (1.8V), 35µA IQ - lower dropout and IQ, but only available in SOT-25 and USP-6B packages (no SO-8EP). | Lacks exposed thermal pad; θJA ≈ 200°C/W in SOT-25 - unsuitable for sustained 1A loads without aggressive heatsinking. | Prefer for space-constrained designs where thermal mass is sufficient; avoid when SO-8EP's thermal performance is required. |
Compared with MCP1703T-1802E/MB and XC6210B182MR-G, the AP7361EA-18SP-13 uniquely balances 1A capability, SO-8EP thermal performance (θJA = 100°C/W), and 68µA IQ - making it the only option among the three viable for thermally demanding 1.8V/1A applications in consumer AV equipment.
Availability
AP7361EA-18SP-13 is available at Aetrix Electronics and suitable for LCD TV power management, set-top box core logic supply, and smart home audio amplifier bias requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for AP7361EA-18SP-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 consumer, industrial, and automotive markets.
The AP7361EA belongs to Diodes' low-dropout linear regulator product line, designed specifically for noise-sensitive, medium-current applications in audio/video equipment and battery-powered consumer electronics where precision, efficiency, and thermal robustness are critical.
FAQ
What is the minimum input voltage required for AP7361EA-18SP-13 to regulate 1.8V at 1A?
The minimum input voltage is determined by dropout: 1.8V + 0.4V = 2.2V. The datasheet specifies 2.2V as the absolute minimum VIN across all conditions, and the device maintains regulation at this point with full 1A output capability and ±1% accuracy. Below 2.2V, output collapses.
Can AP7361EA-18SP-13 operate without an output capacitor?
No. A minimum 2.2µF ceramic output capacitor is mandatory for stability, as confirmed in the datasheet's "Output Capacitor" section and Absolute Maximum Ratings. Omitting it causes oscillation, excessive ripple, and potential thermal shutdown due to instability-induced power dissipation.
How does the EN pin behave when left unconnected?
The EN pin has an internal 3.0MΩ pull-down resistor. When left floating, it defaults to logic-low (~0V), disabling the regulator output and reducing quiescent current to 0.05µA. For guaranteed operation, tie EN to IN or a controlled logic signal - never leave it open in production designs.
Is AP7361EA-18SP-13 qualified for automotive applications?
No. The AP7361EA-18SP-13 is not AEC-Q100 qualified. Diodes explicitly states that automotive-grade versions require separate qualification, PPAP capability, and IATF 16949 manufacturing - none of which apply to this part number. Use only in commercial/consumer applications.
AP7361EA-18SP-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- 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, Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO-EP
AP7361EA-18SP-13 FAQ
1.How can I place an order for AP7361EA-18SP-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7361EA-18SP-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-18SP-13 reliable?
The price and inventory of AP7361EA-18SP-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-18SP-13 is usually 5 days.
3.What payment methods are accepted for AP7361EA-18SP-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7361EA-18SP-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7361EA-18SP-13?
AP7361EA-18SP-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7361EA-18SP-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-18SP-13?
For technical support, including AP7361EA-18SP-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7361EA-18SP-13 requirements.
6.How does Aetrix verify that AP7361EA-18SP-13 is sourced from the original manufacturer or authorized distributors?
All AP7361EA-18SP-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-18SP-13 meets industry standards.
7.What is the process for return or replacement of AP7361EA-18SP-13?
All AP7361EA-18SP-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7361EA-18SP-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-18SP-13 part is unused and in its original packaging.
Return procedure for AP7361EA-18SP-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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