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Diodes Incorporated AP7384-33V-A
- Part No.:
- AP7384-33V-A
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
AP7384-33V-A.pdf
- Description:
- IC REG LIN 3.3V TO92 AMMO 2K
- Quantity:
- Payment:
- Shipping:
Inventory:2,060
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Product details
Overview
AP7384-33V-A from Diodes Incorporated is a fixed-output 3.3V ultra-low dropout (ULDO) linear regulator IC designed for space-constrained, battery-powered systems. It delivers up to 50mA output current with 500mV dropout at full load, 2.5µA quiescent current, ±2% output voltage accuracy, and operates across a 3.3V–40V input range-enabling direct regulation from unregulated 12V/24V rails or multi-cell batteries in portable instrumentation.
For engineers reviewing the AP7384-33V-A datasheet, AP7384-33V-A pinout, AP7384-33V-A application, or AP7384-33V-A equivalent, key selection criteria include dropout performance under 50mA load, thermal shutdown threshold (+160°C), compatibility with low-ESR ceramic capacitors, and TO92 (Ammo Packing) mechanical fit for legacy through-hole designs requiring RoHS-compliant, halogen-free construction.
Technical Context
The AP7384-33V-A integrates a precision voltage reference, error amplifier, resistor feedback network, current-limit circuit, and enable logic into a monolithic silicon die. Its architecture supports stable operation with 1µF input and 2.2µF output ceramic capacitors-eliminating need for electrolytic or tantalum types.
It features active thermal shutdown at +160°C with +20°C hysteresis, short-circuit protection limiting output current to 50mA, and line/load regulation of ≤0.05%/V and ≤0.5%, respectively-ensuring consistent 3.3V rail integrity across wide input and load transients in industrial metering and portable computing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2% (±66mV tolerance) - ensures reliable logic-level compliance for 3.3V microcontrollers and sensors. |
| Input Voltage Range | 3.3V to 40V - supports direct regulation from automotive 12V, industrial 24V, or 3–7-cell Li-ion battery stacks without pre-regulation. |
| Max Output Current | 50mA - sufficient for low-power MCU cores, RTCs, and sensor interfaces in handheld devices and smart meters. |
| Dropout Voltage | 500mV @ 50mA - enables >3.3V output from as low as 3.8V input, critical for battery end-of-life operation. |
| Quiescent Current | 2.5µA @ zero load - minimizes standby power loss in always-on battery applications like utility meters. |
| PSRR | 60dB @ 1kHz - suppresses ripple from noisy DC-DC converters feeding the LDO input. |
| Thermal Shutdown | +160°C activation with +20°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
AP7384-33V-A is supplied in TO92 (Ammo Packing) package-a through-hole, three-terminal plastic case measuring 4.3–4.7mm width × 12.5–14.5mm length × 3.3–3.8mm height, optimized for manual assembly and legacy board layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts 3.3–40V; requires ≥1µF low-ESR ceramic capacitor for stability. |
| 2 | GND | Analog ground reference for internal error amplifier and voltage reference; must be low-impedance path to system ground plane. |
| 3 | VOUT | Regulated 3.3V output; drives load up to 50mA; requires ≥2.2µF ceramic capacitor for transient response and PSRR optimization. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input voltage support | Operates from 3.3V to 40V-enables single-LDO solutions across diverse input sources without external pre-regulators. |
| Ultra-low quiescent current | 2.5µA at no load-extends battery life in always-on utility meters and remote sensors by reducing standby drain. |
| Low-ESR capacitor compatibility | Stable with 1µF input / 2.2µF output ceramic caps-reduces BOM cost and board area vs. electrolytic/tantalum alternatives. |
| Integrated protection | Current limit (50mA), thermal shutdown (+160°C), and short-circuit safe operation-eliminates need for external fault-handling circuitry. |
| High accuracy output | ±2% output voltage over -40°C to +125°C-ensures reliable 3.3V I/O and core supply for precision analog and digital ICs. |
Applications
| Smart Utility Meters | Portable Medical Sensors |
|---|---|
|
Use Scenario: Battery-powered electricity/water/gas meters operating for 10+ years on primary lithium cells. IC Role / Device Role / Timing Role: Primary 3.3V supply for metrology ADC, real-time clock, and RF transceiver. Use Value: 2.5µA quiescent current extends battery life; 40V input withstands surge events on AC-coupled meter inputs. |
Use Scenario: Handheld pulse oximeters and glucose monitors powered by coin-cell or AAA batteries. IC Role / Device Role / Timing Role: Clean 3.3V rail for analog front-end amplifiers and low-power BLE SoC. Use Value: 500mV dropout preserves regulation down to 3.8V input-critical for maintaining accuracy as battery discharges. |
| Laptop Peripheral Modules | Industrial Handheld Terminals |
|
Use Scenario: USB-powered docking accessories (e.g., barcode scanners, smart card readers) with variable input voltage. IC Role / Device Role / Timing Role: Local 3.3V regulator isolating sensitive logic from USB VBUS noise and dropouts. Use Value: 60dB PSRR at 1kHz rejects USB switcher ripple; ±2% accuracy guarantees USB compliance for enumeration timing. |
Use Scenario: Ruggedized field terminals used in warehouse logistics, operating across 12V vehicle power and 24V industrial rails. IC Role / Device Role / Timing Role: Post-regulator converting noisy 12V/24V to stable 3.3V for ARM Cortex-M MCU and display interface. Use Value: 40V absolute max input rating tolerates load-dump transients; TO92 package allows easy rework in high-vibration environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low dropout linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-3302E/MB | 3.3V fixed, 250mA output, 600mV dropout @ 250mA, SOT23-5 package, 3µA IQ | Higher current capability but larger dropout and different pinout; requires PCB redesign. | Select when >50mA load current or better thermal performance in SMT layout is required. |
| AP7361C-33Y-13 | 3.3V fixed, 300mA output, 300mV dropout @ 300mA, SOT89-3 package, 5µA IQ | Lower dropout and higher current, but incompatible TO92 footprint and higher quiescent current. | Choose for new SMT designs needing higher output current and lower dropout, not for TO92 drop-in replacement. |
Compared with MCP1703T-3302E/MB and AP7361C-33Y-13, AP7384-33V-A uniquely balances ultra-low IQ (2.5µA), TO92 through-hole compatibility, and 40V input range-making it optimal for legacy-replacement, long-life battery applications where board space and standby power dominate design constraints.
Availability
AP7384-33V-A is available at Aetrix Electronics and suitable for smart utility meters, portable medical sensors, and industrial handheld terminals requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for AP7384-33V-A 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 integrated circuits, specializing in high-performance, energy-efficient components for consumer, industrial, and automotive markets.
The AP7384 series belongs to Diodes' precision linear regulator product line, engineered specifically for ultra-low-power, wide-input-voltage applications in battery-operated and harsh-environment electronics.
FAQ
What is the maximum input voltage the AP7384-33V-A can safely handle?
The AP7384-33V-A has an absolute maximum input voltage rating of 45V, with recommended operating range up to 40V. Exceeding 45V risks permanent device failure. For automotive or industrial applications subject to load dump, external clamping (e.g., TVS diode) is advised to limit VIN transients within this rating.
Does the AP7384-33V-A require external capacitors, and what values are recommended?
Yes-it requires a minimum 1.0µF ceramic capacitor on VIN and 2.2µF on VOUT, both with low ESR. These values ensure stability, transient response, and PSRR performance per the datasheet. Larger values improve ripple rejection but do not affect basic regulation functionality.
Is the AP7384-33V-A qualified for automotive use under AEC-Q100?
No-the AP7384-33V-A is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., AP7384Q series) with PPAP support and IATF 16949 manufacturing, but the standard AP7384-33V-A is intended for industrial, medical, and consumer applications only.
How does thermal shutdown behave during continuous overload?
When junction temperature reaches +160°C, the AP7384-33V-A disables output and enters thermal shutdown. It remains off until temperature drops by ≥20°C (hysteresis), then automatically resumes regulation-providing self-protecting, non-latching fault recovery without external intervention.
AP7384-33V-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- 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:
- Through Hole
- Supplier Device Package:
- TO-92
AP7384-33V-A FAQ
1.How can I place an order for AP7384-33V-A through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7384-33V-A 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 AP7384-33V-A reliable?
The price and inventory of AP7384-33V-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7384-33V-A is usually 5 days.
3.What payment methods are accepted for AP7384-33V-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7384-33V-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7384-33V-A?
AP7384-33V-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7384-33V-A 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 AP7384-33V-A?
For technical support, including AP7384-33V-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7384-33V-A requirements.
6.How does Aetrix verify that AP7384-33V-A is sourced from the original manufacturer or authorized distributors?
All AP7384-33V-A 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 AP7384-33V-A meets industry standards.
7.What is the process for return or replacement of AP7384-33V-A?
All AP7384-33V-A units undergo pre-shipment inspection (PSI). If there is an issue with AP7384-33V-A, 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 AP7384-33V-A part is unused and in its original packaging.
Return procedure for AP7384-33V-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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