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Diodes Incorporated AP7366-39W5-7
- Part No.:
- AP7366-39W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7366-39W5-7.pdf
- Description:
- IC REG LINEAR 3.9V 600MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,116
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Product details
Overview
AP7366-39W5-7 from Diodes Incorporated is a fixed-output 3.9V, 600mA low-dropout linear regulator in SOT25 package, featuring 60μA quiescent current, 300mV dropout at full load, 75dB PSRR at 1kHz, and integrated enable control, thermal shutdown, and current-limit protection-designed for power management in battery-powered portable electronics and FPGA I/O rails.
For engineers reviewing the AP7366-39W5-7 datasheet, AP7366-39W5-7 pinout, AP7366-39W5-7 application, or AP7366-39W5-7 equivalent, key selection considerations include output voltage accuracy (±1% for 3.9V), fast 150μs start-up time, stability with 1μF ceramic output capacitor, and compatibility with input voltages from 2.2V to 6V in space-constrained SOT25 layouts.
Technical Context
The AP7366-39W5-7 implements a PMOS pass transistor architecture enabling ultra-low quiescent current and fast transient response without requiring external compensation. Its internal 0.8V reference and precision error amplifier deliver tight output regulation across temperature and load variations.
Enable logic operates with VIH ≥ 1.0V and VIL ≤ 0.3V, supporting direct interfacing with 1.8V/3.3V GPIOs. Built-in thermal shutdown activates at +150°C with +20°C hysteresis, and short-circuit current is clamped to ~250mA to limit power dissipation during fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.9V ±1.0% at 10mA load ensures stable core/I/O rail for 3.3V–4.0V tolerant circuits |
| Max Output Current | 600mA continuous supports moderate-power peripherals like sensors, ADCs, or low-speed interfaces |
| Quiescent Current | 60μA typical enables >1-year battery life in always-on IoT nodes with 200mAh coin cells |
| Dropout Voltage | 300mV at 600mA allows operation down to VIN = 4.2V-compatible with single-cell Li-ion (3.0–4.2V) systems |
| PSRR | 75dB at 1kHz suppresses switching noise from upstream DC-DC converters feeding the LDO input |
| Start-Up Time | 150μs enables rapid power sequencing in wake-from-sleep applications such as wearables and remote controls |
| Operating Temp | -40°C to +85°C ambient rating supports industrial and automotive cabin-temperature deployments |
Pinout & Package
SOT25 (5-pin, 3.0mm × 2.8mm × 1.3mm) package with exposed pad not electrically connected; optimized for low thermal resistance (θJA = 169°C/W) on standard FR-4 PCBs using minimum recommended copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Input voltage supply | Accepts 2.2V–6V; requires ≥1μF ceramic bypass capacitor placed adjacent to pin for EMI suppression and stability |
| 2 - GND | Power ground reference | Common return path for input/output capacitors and load; must connect directly to low-impedance ground plane |
| 3 - EN | Enable control input | Active-high logic interface; tie to IN for always-on operation or drive with MCU GPIO for dynamic power gating |
| 4 - NC | No connection | Internally unconnected; must remain floating-no external bias or routing permitted |
| 5 - OUT | Regulated output voltage | Delivers 3.9V ±1% to load; requires ≥1μF ceramic capacitor between OUT and GND for transient stability |
Key Features
| Feature | Design Value |
|---|---|
| Low-IQ operation | 60μA quiescent current minimizes standby power loss-critical for battery longevity in portable devices |
| Fast transient response | Load/line transients settle within <200μs due to high-gain error amplifier and optimized internal compensation |
| Stability with small COUT | Guaranteed stable with 1μF ceramic output capacitor-reduces BOM count and board area vs. legacy LDOs |
| Integrated protection | Thermal shutdown (+150°C), current limit (~1A), and short-circuit clamp (~250mA) eliminate need for external fault circuitry |
| High PSRR | 75dB at 1kHz rejects ripple from noisy switchers-enables clean analog/RF supply rails without additional filtering |
Applications
| Portable Medical Sensors | FPGA I/O Power Rail |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) with Bluetooth LE radio and analog front-end. IC Role / Device Role / Timing Role: Primary 3.9V power source for BLE SoC I/O and sensor biasing circuitry. Use Value: 60μA IQ extends disposable patch battery life beyond 14 days; 150μs start-up enables instant wake-on-event. |
Use Scenario: Low-cost industrial FPGA development board powering bank-specific I/O banks. IC Role / Device Role / Timing Role: Dedicated 3.9V LDO for 3.3V-tolerant I/O banks requiring clean, low-noise supply. Use Value: 75dB PSRR prevents digital switching noise from corrupting I/O signal integrity; SOT25 footprint fits dense PCB layouts. |
| Smart Home Remote Controls | Automotive Cabin Infotainment Peripherals |
Use Scenario: IR/RF remote with motion wake-up, display backlight, and button matrix. IC Role / Device Role / Timing Role: Main 3.9V regulator for microcontroller, display driver, and RF transceiver. Use Value: 300mV dropout allows operation down to 4.2V-fully utilizes Li-ion cell voltage range before cutoff. |
Use Scenario: USB-C accessory module (e.g., HDMI adapter) powered from vehicle's 5V USB port. IC Role / Device Role / Timing Role: Post-regulator converting 5V USB to stable 3.9V for USB PD controller and level shifters. Use Value: -40°C to +85°C rating meets automotive cabin ambient requirements; thermal shutdown prevents latch-up during hot-plug 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 |
|---|---|---|---|
| MCP1700-3902E/TO | 300mA max output, 1.8μA IQ, no enable pin, SOT23-3 package | Limited to ultra-low-power microcontrollers; lacks EN control and higher current capability | Select only when load current ≤300mA and enable functionality is unnecessary |
| Torex XC6210B392MR-G | 400mA max output, 12μA IQ, 250mV dropout at 300mA, SOT25 package | Lower IQ but insufficient for 600mA loads; tighter initial accuracy (±0.8%) | Prefer for sub-400mA applications where lowest possible standby current is critical |
Compared with MCP1700-3902E/TO and XC6210B392MR-G, AP7366-39W5-7 uniquely balances 600mA delivery, 60μA IQ, EN control, and SOT25 compatibility-making it optimal for mid-power portable systems needing both efficiency and flexibility.
Availability
AP7366-39W5-7 is available at Aetrix Electronics and suitable for portable medical sensors, FPGA I/O power rails, smart home remotes, and automotive cabin peripherals requiring stable component supply with guaranteed long-term manufacturability.
Supply support for AP7366-39W5-7 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 AP7366 belongs to Diodes' high-performance LDO portfolio targeting battery-powered and space-constrained systems where low quiescent current, fast transient response, and robust protection are essential design requirements.
FAQ
What is the minimum input voltage required for AP7366-39W5-7 to maintain regulation at 600mA load?
The AP7366-39W5-7 requires VIN ≥ 4.2V to sustain 3.9V output at 600mA, based on its 300mV dropout specification. At lower input voltages-such as 4.1V-the output will drop below regulation due to headroom limitation. Input must also stay within absolute maximum rating of 6.5V.
Can AP7366-39W5-7 operate without an output capacitor?
No. The device requires a minimum 1μF ceramic capacitor between OUT and GND for stability and transient performance. Omitting it causes oscillation and potential damage. The datasheet explicitly states stability is guaranteed only with ≥1μF ceramic COUT having ESR between 10mΩ and 300mΩ.
Is the EN pin internally pulled up or down?
The EN pin has no internal pull-up or pull-down resistor. It presents high-impedance CMOS input with leakage ≤±0.1μA. To ensure reliable turn-on, EN must be actively driven to ≥1.0V (VIH) or tied directly to IN. Leaving it floating may cause unpredictable startup behavior.
Does AP7366-39W5-7 support reverse-voltage protection?
No. The AP7366-39W5-7 lacks reverse-voltage protection. Applying reverse polarity to IN or OUT can damage the internal PMOS pass element and bandgap circuitry. External protection-such as a series Schottky diode or ideal diode controller-is required in systems prone to reverse connection.
AP7366-39W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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):
- 3.9V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.29V @ 600mA
- Current - Output:
- 600mA
- Current - Quiescent (Iq):
- 80 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB ~ 55dB (1kHz ~ 10kHz)
- Control Features:
- Current Limit, Enable
- Protection Features:
- Over Current, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP7366-39W5-7 FAQ
1.How can I place an order for AP7366-39W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7366-39W5-7 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 AP7366-39W5-7 reliable?
The price and inventory of AP7366-39W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7366-39W5-7 is usually 5 days.
3.What payment methods are accepted for AP7366-39W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7366-39W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7366-39W5-7?
AP7366-39W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7366-39W5-7 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 AP7366-39W5-7?
For technical support, including AP7366-39W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7366-39W5-7 requirements.
6.How does Aetrix verify that AP7366-39W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7366-39W5-7 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 AP7366-39W5-7 meets industry standards.
7.What is the process for return or replacement of AP7366-39W5-7?
All AP7366-39W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7366-39W5-7, 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 AP7366-39W5-7 part is unused and in its original packaging.
Return procedure for AP7366-39W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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