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Diodes Incorporated AP7361C-18Y5-13
- Part No.:
- AP7361C-18Y5-13
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-89-5/6
- Datasheet:
-
AP7361C-18Y5-13.pdf
- Description:
- IC REG LINEAR 1.8V 1A SOT89-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,439
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Product details
Overview
AP7361C-18Y5-13 from Diodes Incorporated is a 1A fixed-output (1.8V) ultra-low dropout linear regulator in SOT89-5 package with enable control, ±1% output accuracy, 360mV dropout at 1A (for 3.3V version), and 60µA typical quiescent current-designed for stable power delivery in portable audio systems, LCD display bias rails, and battery-powered IoT sensor nodes.
For engineers reviewing the AP7361C-18Y5-13 datasheet, AP7361C-18Y5-13 pinout, AP7361C-18Y5-13 application, or AP7361C-18Y5-13 equivalent, key selection criteria include dropout voltage at 1A load, EN pin logic thresholds (VIH = 1.0V min, VIL = 0.3V max), thermal shutdown threshold (150°C), PSRR (75dB @ 1kHz), and compatibility with ≥2.2µF MLCC output capacitors.
Technical Context
The AP7361C-18Y5-13 integrates a PMOS pass element, band-gap reference (0.8V), error amplifier, and fold-back short-circuit protection (400mA). Its fixed 1.8V output eliminates external resistor divider requirements while retaining full enable functionality via active-high EN pin.
It operates across 2.2V–6.0V input range with thermal shutdown hysteresis of 20°C and junction-to-ambient thermal resistance of 150°C/W in SOT89-5. Start-up time is 150µs typical with 2.2µF output capacitor and 30Ω load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% - ensures precise core voltage for 1.8V I/O domains in microcontrollers and FPGAs. |
| Max Output Current | 1.0A - supports moderate-power digital loads like display drivers or RF front-end bias without derating at +85°C ambient. |
| Dropout Voltage | 340mV typical at 1A (for 1.8V output) - enables operation from 2.14V input, critical for single-cell Li-ion or LiFePO₄ systems. |
| Quiescent Current | 60µA typical - minimizes standby power loss in always-on sensor nodes and battery-backed real-time clocks. |
| PSRR | 75dB @ 1kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Enable Threshold | VIH = 1.0V min, VIL = 0.3V max - compatible with 1.8V/3.3V GPIO without level-shifting in mixed-voltage systems. |
| Thermal Shutdown | 150°C activation with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
SOT89-5 package with exposed thermal pad (pin 4 = GND); compact 4.5mm × 2.5mm footprint optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input supply connection | Accepts 2.2V–6.0V; requires ≥1µF ceramic bypass capacitor placed adjacent to pin for stability. |
| 2 (GND) | Ground reference | Common return path for input/output capacitors and thermal pad; must be low-impedance plane for EMI suppression. |
| 3 (OUT) | Regulated output | Delivers 1.8V ±1%; requires ≥2.2µF MLCC on output to ensure stability and transient response. |
| 4 (GND) | Thermal ground pad | Primary heat dissipation path; must be soldered to ≥1cm² copper pour with ≥4 thermal vias for 1A operation. |
| 5 (EN) | Enable control input | Active-high logic interface; internal 3.0MΩ pull-down ensures default-off state if left floating. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 340mV at 1A for 1.8V output enables use with depleted batteries or low-headroom DC/DC stages. |
| Fold-back short-circuit protection | Limits output current to ~400mA during hard shorts, preventing thermal runaway and enabling safe auto-recovery. |
| Stable with small MLCCs | Guaranteed stability with ≥2.2µF ceramic output capacitors-reduces BOM cost and board area vs. tantalum alternatives. |
| Low IQ with full enable | 60µA quiescent current maintained across full 2.2V–6.0V input range, preserving battery life in sleep modes. |
| High PSRR at audio frequencies | 75dB rejection at 1kHz suppresses ripple from buck converter switching edges that fall within audible band. |
Applications
| Portable Audio Amplifiers | LCD Display Bias Rails |
|---|---|
Use Scenario: Powering Class-D audio amplifier ICs in Bluetooth speakers and headphones. IC Role / Device Role / Timing Role: Primary 1.8V supply for digital control logic and I²S interface circuitry. Use Value: Low 60µA quiescent current extends playback time; 75dB PSRR prevents audible switching noise coupling into analog output stages. |
Use Scenario: Generating stable 1.8V gate drive for TFT-LCD source driver ICs. IC Role / Device Role / Timing Role: Fixed-voltage bias rail for high-speed digital interface between timing controller and column drivers. Use Value: ±1% output accuracy ensures consistent gamma correction; 340mV dropout allows direct regulation from 2.5V intermediate rail. |
| IoT Sensor Node Power | USB-C Peripheral Logic Supply |
Use Scenario: Regulating power for ultra-low-power MCU + environmental sensor clusters in battery-operated edge devices. IC Role / Device Role / Timing Role: Always-on 1.8V supply for RTC, wake-up comparator, and BLE radio baseband logic. Use Value: Thermal shutdown (150°C) and fold-back protection prevent field failure during firmware update surges or ambient temperature excursions. |
Use Scenario: Providing clean 1.8V logic supply for USB-C PD controller and port management ICs. IC Role / Device Role / Timing Role: Secondary regulated rail decoupled from noisy 5V VBUS-derived supplies. Use Value: 150µs start-up time enables rapid power sequencing compliance with USB Type-C specification; EN pin allows dynamic rail control during cable attach/detach events. |
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 | 300mA max output, 170mV dropout at 250mA, no enable pin, SOT23-3 package | Limited to low-current logic rails; unsuitable for 1A loads or systems requiring controlled power sequencing | Select only for space-constrained, sub-300mA applications where enable control is unnecessary |
| Torex XC6210B182MR-G | 1A output, 250mV dropout at 1A (1.8V), 1.0µA shutdown current, SOT23-5 package | Lower IQ in shutdown but higher dropout than AP7361C-18Y5-13; less robust thermal performance (θJA = 200°C/W) | Prefer when ultra-deep sleep current dominates design priority over thermal margin or transient response |
Compared with MCP1700-1802E/TO and XC6210B182MR-G, the AP7361C-18Y5-13 uniquely balances 1A capability, 340mV dropout, integrated enable, and 150°C thermal protection in a thermally enhanced SOT89-5 package-making it optimal for mid-power portable systems demanding both efficiency and robustness.
Availability
AP7361C-18Y5-13 is available at Aetrix Electronics and suitable for portable audio systems, LCD display bias rails, IoT sensor node power, and USB-C peripheral logic supply requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP7361C-18Y5-13 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 AP7361C belongs to Diodes' high-performance LDO regulator product line, engineered for low-noise, low-dropout power delivery in battery-powered and space-constrained consumer and industrial electronics.
FAQ
What is the minimum input voltage required for stable 1.8V output at 1A?
The AP7361C-18Y5-13 requires VIN ≥ VOUT + VDROPOUT = 1.8V + 0.34V = 2.14V minimum for 1A operation. The datasheet specifies 2.2V as absolute minimum operating input voltage, providing 60mV margin for worst-case dropout variation and line tolerance.
Can the EN pin be left unconnected in always-on applications?
No-EN must not be left floating. For always-on operation, tie EN directly to IN. The device includes a 3.0MΩ internal pull-down resistor, but leaving EN unconnected risks noise-induced toggling or undefined startup behavior due to PCB parasitic coupling.
Is an output capacitor mandatory, and what type is recommended?
Yes-an output capacitor ≥2.2µF is mandatory for stability. Ceramic (MLCC) is strongly recommended due to low ESR; tantalum or polymer capacitors may be used if ESR is 10–100mΩ, but aluminum electrolytics are not supported. Placement must be within 3mm of OUT and GND pins.
How does thermal shutdown behave under continuous overload?
At junction temperature ≈150°C, the regulator disables output and enters thermal shutdown. It remains off until junction cools to ≈130°C (20°C hysteresis), then resumes regulation. Under sustained overload, this causes on/off cycling-visible as output voltage oscillation-protecting the die from irreversible damage.
AP7361C-18Y5-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-89-5/6
- 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):
- 0.57V @ 1A (Typ)
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 80 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB ~ 55dB (1kHz ~ 10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-5
AP7361C-18Y5-13 FAQ
1.How can I place an order for AP7361C-18Y5-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7361C-18Y5-13 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 AP7361C-18Y5-13 reliable?
The price and inventory of AP7361C-18Y5-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7361C-18Y5-13 is usually 5 days.
3.What payment methods are accepted for AP7361C-18Y5-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7361C-18Y5-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7361C-18Y5-13?
AP7361C-18Y5-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7361C-18Y5-13 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 AP7361C-18Y5-13?
For technical support, including AP7361C-18Y5-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7361C-18Y5-13 requirements.
6.How does Aetrix verify that AP7361C-18Y5-13 is sourced from the original manufacturer or authorized distributors?
All AP7361C-18Y5-13 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 AP7361C-18Y5-13 meets industry standards.
7.What is the process for return or replacement of AP7361C-18Y5-13?
All AP7361C-18Y5-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7361C-18Y5-13, 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 AP7361C-18Y5-13 part is unused and in its original packaging.
Return procedure for AP7361C-18Y5-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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