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Diodes Incorporated AP7383-33WR-7
- Part No.:
- AP7383-33WR-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7383-33WR-7.pdf
- Description:
- IC REG LIN 3.3V SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:11,419
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Product details
Overview
AP7383-33WR-7 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 150mA output current with 500mV dropout at 50mA, ±1% output voltage accuracy, and only 1.8µA ground current at zero load - enabling long runtime in portable instrumentation and USB-powered devices.
For engineers reviewing the AP7383-33WR-7 datasheet, AP7383-33WR-7 pinout, AP7383-33WR-7 application, or AP7383-33WR-7 equivalent, key selection criteria include its 3.5–30V input range, thermal shutdown at +160°C, compatibility with 1µF ceramic capacitors, and SOT25 (WR) package with validated enable functionality and NC pin handling.
Technical Context
The AP7383-33WR-7 integrates a precision voltage reference, error amplifier, resistor network for fixed 3.3V output, current-limit circuit (150mA typ), and chip-enable logic - all within a single monolithic IC. Its architecture supports stable regulation under fast load transients while maintaining ultra-low quiescent current across temperature.
It operates over –40°C to +125°C junction temperature, features ±100ppm/°C output voltage drift, and includes thermal shutdown with 20°C hysteresis. The device is fully RoHS-compliant, halogen- and antimony-free, and qualified for industrial applications per IATF 16949 manufacturing standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% - ensures stable MCU core or sensor rail without external feedback. |
| Input Voltage Range | 3.5V to 30V - supports wide-input battery stacks, automotive transients, and unregulated wall adapters. |
| Max Output Current | 150mA - sufficient for low-power microcontrollers, sensors, and RF modules. |
| Dropout Voltage | 360mV (typ) @ 50mA - enables regulation from 3.66V input, critical for single-cell LiFePO₄ or dual-cell alkaline systems. |
| Ground Current | 1.8µA @ IOUT = 0 - minimizes standby power loss in always-on IoT nodes. |
| Line Regulation | 0.05%/V - maintains tight output stability despite input ripple or battery sag. |
| Thermal Shutdown | Activates at +160°C with +20°C hysteresis - prevents latch-up during sustained overload or poor PCB heatsinking. |
Pinout & Package
SOT25 (WR) package: 5-pin surface-mount, 2.8mm × 2.9mm footprint, 1.05mm height, matte tin-plated leads, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts up to 30V DC with internal overvoltage protection. |
| 2 | GND | Power ground reference; must be low-impedance connection to minimize noise and thermal resistance. |
| 3 | VOUT | Regulated 3.3V output; requires ≥1µF ceramic capacitor placed ≤2mm from pin for stability. |
| 4 | EN | Active-high enable input; pulls output to high-impedance when <0.4V; draws ≤1µA leakage. |
| 5 | NC | No-connect terminal; internally open, recommended tied to GND for improved thermal dissipation on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Wide 3.5–30V input range | Eliminates need for pre-regulation in 12V/24V industrial or automotive auxiliary rails. |
| Ultra-low 1.8µA ground current | Extends battery life in coin-cell or energy-harvesting applications where sleep current dominates lifetime. |
| ±1% output voltage accuracy | Meets tight tolerance requirements of ADC references and precision analog front-ends without trimming. |
| Ceramic capacitor compatible | Enables use of small, low-ESR 1µF X5R/X7R MLCCs - reduces BOM count and board area vs. tantalum alternatives. |
| Thermal shutdown with hysteresis | Prevents thermal runaway during short-circuit events while allowing automatic recovery after cooldown. |
Applications
| Portable Medical Sensors | USB-Powered Test Equipment |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) with BLE radio operating from CR2032 coin cell. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying MCU, sensor interface, and RF transceiver. Use Value: 1.8µA quiescent current extends battery life beyond 6 months; 3.5V minimum input allows operation down to end-of-life battery voltage (~2.8V under load). | Use Scenario: Handheld oscilloscope probe powered via USB 2.0 bus (4.75–5.25V). IC Role / Device Role / Timing Role: Local 3.3V rail generator for FPGA configuration and analog front-end ASIC. Use Value: 500mV dropout enables full 3.3V output even at USB low-voltage limit; ±1% accuracy ensures precise ADC reference stability. |
| Industrial Data Loggers | Smart Home Sensor Hubs |
Use Scenario: Battery-backed environmental logger using Li-SOCl₂ primary cell (3.6V nominal, up to 3.9V fresh). IC Role / Device Role / Timing Role: Main system regulator powering microcontroller, EEPROM, and RS-485 transceiver. Use Value: 30V absolute max input withstands induced transients on long sensor cables; thermal shutdown protects against enclosure overheating in sealed enclosures. | Use Scenario: Zigbee-enabled occupancy sensor with motion detection and ambient light sensing. IC Role / Device Role / Timing Role: Low-noise 3.3V supply for optical sensor array and wireless SoC. Use Value: Excellent line/load regulation (0.05%/V, 0.5%) prevents false triggers from supply ripple; EN pin enables synchronized wake-up with host MCU. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3302E/MB | 250mA output, 1.6µA IQ, but only 16V max input; no EN pin in this variant. | Lacks enable control and lower input voltage ceiling limits use in 24V industrial settings. | Select when higher output current is needed and enable functionality is unnecessary. |
| TN8133-33 | 150mA output, 2.5µA IQ, 30V input, but ±2% output accuracy and no thermal shutdown. | Looser voltage tolerance affects precision analog circuits; missing thermal protection increases system-level safety burden. | Choose only for cost-sensitive, non-safety-critical consumer applications with relaxed accuracy needs. |
Compared with MCP1700T-3302E/MB and TN8133-33, the AP7383-33WR-7 uniquely combines 30V input capability, EN control, ±1% accuracy, and integrated thermal shutdown - making it optimal for industrial and portable designs requiring robustness, precision, and low-power management.
Availability
AP7383-33WR-7 is available at Aetrix Electronics and suitable for portable medical sensors, USB-powered test equipment, and industrial data loggers requiring stable component supply with consistent parametric performance and long-term manufacturability.
Supply support for AP7383-33WR-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 company specializing in discrete, analog, and mixed-signal ICs, with design, manufacturing, and distribution operations across Asia, the Americas, and Europe.
The AP7383 series belongs to Diodes' high-reliability linear regulator product line, engineered specifically for battery-powered and wide-input industrial applications demanding low IQ, high accuracy, and robust thermal protection.
FAQ
What is the minimum input voltage required for regulation at 3.3V output?
The AP7383-33WR-7 requires a minimum input voltage of 3.5V to maintain regulation. At 50mA load, its typical dropout is 360mV - meaning it sustains 3.3V output with as little as 3.66V input. Below 3.5V, the device enters dropout and output voltage drops linearly with input.
Can the NC pin be left floating on the SOT25 (WR) package?
No - although internally unconnected, the NC pin (Pin 5) must be tied to GND on the PCB. This practice maximizes copper area for thermal dissipation and improves thermal resistance by ~15°C/W, directly supporting reliable operation at 150mA continuous load in compact layouts.
Does the AP7383-33WR-7 require an input capacitor?
Yes - a minimum 1µF ceramic capacitor is required between VIN and GND, placed within 2mm of the pins. This stabilizes the input impedance, suppresses high-frequency noise from upstream sources, and prevents oscillation during transient load steps, as confirmed in the DS40699 Rev. 8-2 application circuit.
Is the AP7383-33WR-7 qualified for automotive applications?
No - while manufactured in IATF 16949-certified facilities, the AP7383-33WR-7 itself is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., AP7383Q series) with extended temperature screening, PPAP documentation, and change control - contact Diodes directly for those part numbers.
AP7383-33WR-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):
- 30V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.5V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 3 µA
- Current - Supply (Max):
- 3 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-25
AP7383-33WR-7 FAQ
1.How can I place an order for AP7383-33WR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7383-33WR-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 AP7383-33WR-7 reliable?
The price and inventory of AP7383-33WR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7383-33WR-7 is usually 5 days.
3.What payment methods are accepted for AP7383-33WR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7383-33WR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7383-33WR-7?
AP7383-33WR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7383-33WR-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 AP7383-33WR-7?
For technical support, including AP7383-33WR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7383-33WR-7 requirements.
6.How does Aetrix verify that AP7383-33WR-7 is sourced from the original manufacturer or authorized distributors?
All AP7383-33WR-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 AP7383-33WR-7 meets industry standards.
7.What is the process for return or replacement of AP7383-33WR-7?
All AP7383-33WR-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7383-33WR-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 AP7383-33WR-7 part is unused and in its original packaging.
Return procedure for AP7383-33WR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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