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Diodes Incorporated AP7384-33SA-7
- Part No.:
- AP7384-33SA-7
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AP7384-33SA-7.pdf
- Description:
- IC REG LIN 3.3V SOT23 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:11,471
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Product details
Overview
AP7384-33SA-7 from Diodes Incorporated is a fixed 3.3V, 50mA ultra-low dropout (ULDO) linear regulator IC with 40V maximum input voltage, 500mV dropout at full load, and 2.5µA quiescent current. It integrates thermal shutdown, short-circuit protection, and high output accuracy (±2%) for power management in space-constrained portable electronics using SOT23 packaging.
For engineers reviewing the AP7384-33SA-7 datasheet, AP7384-33SA-7 pinout, AP7384-33SA-7 application, or AP7384-33SA-7 equivalent, key selection criteria include wide VIN range (3.3–40V), low ground current across load, ceramic capacitor compatibility, and thermal robustness in battery-powered systems.
Technical Context
The AP7384-33SA-7 employs a precision bandgap reference and error amplifier to maintain ±2% output voltage accuracy over -40°C to +125°C. Its internal current-limit circuit activates at 50mA, and thermal shutdown triggers at +160°C with +20°C hysteresis.
Designed for low-noise, low-ESR ceramic output capacitors (2.2µF typical), it achieves 60dB PSRR at 1kHz and exhibits <0.05%/V line regulation and <0.5% load regulation - enabling stable operation under varying input and load conditions in USB-powered and metering applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2% - ensures reliable logic-level supply for 3.3V microcontrollers and sensors without external feedback. |
| Max Input Voltage | 40V - supports direct connection to unregulated 24V/36V industrial rails or automotive battery inputs with transient margin. |
| Dropout Voltage | 500mV @ 50mA - enables regulation down to VIN = 3.8V, critical for extending battery runtime in single-cell Li-ion or multi-cell alkaline systems. |
| Quiescent Current | 2.5µA @ zero load - minimizes standby power loss in always-on metering and IoT edge nodes. |
| Thermal Shutdown | 160°C activation with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
| PSRR | 60dB @ 1kHz - suppresses ripple from noisy DC-DC pre-regulators, improving ADC reference stability and RF subsystem noise floor. |
| Load Regulation | 0.5% from 1mA to 50mA - maintains consistent voltage under dynamic load changes in portable computing peripherals. |
Pinout & Package
SOT23-3 package: compact 2.9mm × 1.3mm surface-mount footprint with exposed pad for enhanced thermal dissipation; compatible with standard reflow profiles and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input supply terminal | Accepts 3.3–40V DC; requires 1µF ceramic input capacitor close to pin for stability and transient response. |
| 2 (VOUT) | Regulated output terminal | Delivers fixed 3.3V ±2%; connects directly to load and 2.2µF ceramic output capacitor for loop stability. |
| 3 (GND) | Ground reference | Common return path for input/output currents; must be tied to low-impedance PCB ground plane to minimize noise and thermal resistance. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input voltage range | Supports 3.3V to 40V input - eliminates need for pre-regulation in industrial sensor nodes powered from 24V field buses. |
| Ultra-low quiescent current | 2.5µA at no load - extends shelf life and operational time in battery-backed smart meters and remote monitors. |
| Ceramic capacitor compatibility | Stable with ≥2.2µF X5R/X7R MLCCs - reduces BOM count and board area versus tantalum or electrolytic alternatives. |
| Thermal shutdown with hysteresis | +160°C trip / +140°C recovery - enables safe automatic recovery after fault clearance without manual reset. |
| Short-circuit protection | Current limit clamps at 50mA - prevents catastrophic failure during output shorts in handheld diagnostic tools. |
Applications
| Smart Electricity Meters | USB-Powered Peripherals |
|---|---|
|
Use Scenario: Powering metrology ICs, RTCs, and communication modules in Class 0.2 static electricity meters operating from 3-phase 240V AC via auxiliary supply. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying isolated data acquisition and NB-IoT modem sections. Use Value: 40V input rating accommodates rectified auxiliary supply transients; ±2% accuracy ensures precise ADC reference voltage calibration. |
Use Scenario: Regulating bus voltage for USB 2.0 hubs, card readers, and HID devices drawing up to 50mA from 5V USB VBUS. IC Role / Device Role / Timing Role: Local point-of-load regulator decoupling USB host controller I/O and PHY power domains. Use Value: 500mV dropout allows full 3.3V output even as VBUS sags to 4.5V; 60dB PSRR rejects switching noise from USB-C PD controllers. |
| Portable Medical Sensors | Laptop Subsystem Rails |
|
Use Scenario: Supplying low-power pulse oximeter or glucose monitor ASICs powered by coin-cell or Li-poly batteries. IC Role / Device Role / Timing Role: Main system regulator delivering clean 3.3V to analog front-end and BLE radio. Use Value: 2.5µA quiescent current maximizes battery life in sleep mode; thermal shutdown protects against enclosure overheating during clinical use. |
Use Scenario: Generating auxiliary 3.3V rail for embedded controller (EC), keyboard backlight, or touchpad interface in thin-and-light notebooks. IC Role / Device Role / Timing Role: Secondary LDO supporting non-CPU subsystems with independent enable control. Use Value: SOT23-3 footprint fits tight layout constraints near EC; <0.5% load regulation prevents brownout during sudden touchpad wake events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-3302E/MB | 3.3V, 250mA, 6µA IQ, 600mV dropout @ 250mA - higher current but larger dropout and quiescent current. | Targets higher-current loads (e.g., Wi-Fi modules); less suitable for µA-level battery standby. | Select when >50mA load current or tighter thermal margin is required; verify PCB thermal relief for SOT23-5 package. |
| AP2210K-3.3TRG1 | 3.3V, 150mA, 3µA IQ, 400mV dropout @ 150mA - lower dropout but rated only to 24V VIN max. | Optimized for 5V/12V systems (e.g., set-top boxes); not rated for 36V industrial inputs. | Prefer for cost-sensitive consumer designs with ≤24V input; avoid where 40V surge immunity is mandatory. |
Compared with MCP1703T-3302E/MB and AP2210K-3.3TRG1, the AP7384-33SA-7 uniquely balances ultra-low IQ (2.5µA), 40V input capability, and SOT23-3 size - making it optimal for long-life, high-input-voltage portable instrumentation where board space and standby power are critical.
Availability
AP7384-33SA-7 is available at Aetrix Electronics and suitable for smart metering, USB peripheral design, portable medical sensors, and laptop subsystem power requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AP7384-33SA-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 components for industrial, computing, communications, and consumer markets.
The AP7384 series belongs to Diodes' high-reliability LDO portfolio, engineered specifically for battery-powered and wide-input industrial applications demanding low IQ, high accuracy, and robust fault protection.
FAQ
What is the minimum input voltage required for regulation at 3.3V output?
The AP7384-33SA-7 requires VIN ≥ VOUT + VDROP. With a typical dropout of 500mV at 50mA, the minimum functional input is 3.8V. At lighter loads, dropout decreases - e.g., ~100mV at 1mA - allowing regulation down to ~3.4V in ultra-low-power modes.
Can the AP7384-33SA-7 be used with ceramic output capacitors smaller than 2.2µF?
No. The datasheet specifies 2.2µF minimum ceramic capacitance (X5R/X7R) for stability. Using smaller values risks oscillation or degraded transient response. Equivalent series resistance (ESR) must remain below 100mΩ; standard 0805 or 1206 MLCCs meet this requirement.
Does the AP7384-33SA-7 have an enable pin?
No. The AP7384-33SA-7 lacks an active enable input. It operates continuously when VIN is within specification. For on/off control, external MOSFET switching on the input rail or use of the pin-compatible AP7381 (which includes CE) is required.
Is the AP7384-33SA-7 qualified for automotive applications?
No. While Diodes offers AEC-Q100-qualified variants in the AP73xx family (e.g., AP7384Q), the AP7384-33SA-7 is not automotive-grade. It is rated for industrial temperature range (–40°C to +125°C) but lacks PPAP documentation, IATF 16949 manufacturing certification, or AEC stress testing.
AP7384-33SA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 50mA
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- 25 µA
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Current Limit, Thermal Shutdown
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AP7384-33SA-7 FAQ
1.How can I place an order for AP7384-33SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7384-33SA-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 AP7384-33SA-7 reliable?
The price and inventory of AP7384-33SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7384-33SA-7 is usually 5 days.
3.What payment methods are accepted for AP7384-33SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7384-33SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7384-33SA-7?
AP7384-33SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7384-33SA-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 AP7384-33SA-7?
For technical support, including AP7384-33SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7384-33SA-7 requirements.
6.How does Aetrix verify that AP7384-33SA-7 is sourced from the original manufacturer or authorized distributors?
All AP7384-33SA-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 AP7384-33SA-7 meets industry standards.
7.What is the process for return or replacement of AP7384-33SA-7?
All AP7384-33SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7384-33SA-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 AP7384-33SA-7 part is unused and in its original packaging.
Return procedure for AP7384-33SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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