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Diodes Incorporated AP7383-44WW-7
- Part No.:
- AP7383-44WW-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7383-44WW-7.pdf
- Description:
- LDO CMOS LOWCURR SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:2,679
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Product details
Overview
AP7383-44WW-7 from Diodes Incorporated is a fixed-output 4.4V, 150mA ultra-low dropout (ULDO) linear regulator in SOT25 (WW) package. It features 30V max input voltage, 500mV dropout at 50mA, ±1% output accuracy, 1.8µA ground current at zero load, and thermal shutdown protection. Designed for USB-powered instrumentation and portable devices requiring stable low-noise bias under wide-input conditions.
For engineers reviewing the AP7383-44WW-7 datasheet, AP7383-44WW-7 pinout, AP7383-44WW-7 application, or AP7383-44WW-7 equivalent, key selection criteria include dropout performance at 150mA load, thermal resistance in SOT25-WW (193°C/W), EN pin compatibility with 2.0V logic high, and fixed 4.4V output tolerance across -40°C to +125°C junction temperature.
Technical Context
The AP7383-44WW-7 integrates a precision voltage reference, error amplifier, resistor network for fixed 4.4V output, current-limit circuit (150mA typical), and enable control. Its architecture supports operation from 3.5V to 30V input while maintaining regulation down to VIN – VOUT = 360mV (typ.) at 50mA.
Thermal shutdown activates at +160°C with +20°C hysteresis, and the device uses ceramic capacitors (1µF CIN/COUT) for stability. Ground current remains constant (1.8–3.0µA) from 0mA to 150mA load, enabling battery-life optimization in always-on instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 4.4V ±1% (ensures stable MCU I/O rail or sensor bias without external feedback) |
| Max Input Voltage | 30V (supports 24V industrial bus or automotive transients with margin) |
| Dropout Voltage | 360mV typ. @ 50mA (enables regulation from 4.76V input; critical for Li-ion + LDO systems) |
| Quiescent Current | 1.8µA typ. @ 0mA load (extends battery runtime in sleep-mode portable instruments) |
| Current Limit | 150mA (protects against short-circuit while sustaining full rated load) |
| Line Regulation | 0.05%/V (minimizes output drift across wide input range) |
| Thermal Shutdown | +160°C activation with +20°C hysteresis (prevents latch-up during sustained overload) |
Pinout & Package
SOT25 (WW) package: 5-pin surface-mount, 3.0mm × 2.8mm body, 0.95mm height, matte tin-plated leads, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts 3.5–30V; requires 1µF ceramic decoupling |
| 2 | GND | Power ground reference; must connect to low-impedance PCB plane for thermal dissipation |
| 3 | VOUT | Regulated 4.4V output; drives load up to 150mA with <0.5% load regulation |
| 4 | NC | No internal connection; recommended to tie to GND for thermal copper area enhancement |
| 5 | NC | No internal connection; recommended to tie to GND for thermal copper area enhancement |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range (3.5–30V) | Enables single-regulator support for multi-rail systems (e.g., 5V/12V/24V inputs) without redesign |
| Ultra-low quiescent current (1.8µA) | Reduces standby power loss by >95% vs. standard LDOs, critical for coin-cell or energy-harvesting sensors |
| Low ESR ceramic capacitor compatible | Eliminates need for costly tantalum or electrolytic capacitors; reduces BOM cost and board space |
| Thermal shutdown with hysteresis | Prevents thermal runaway during intermittent overloads while allowing safe recovery without manual reset |
| ±1% output accuracy | Meets tight analog sensor or ADC reference voltage requirements without post-regulation trimming |
Applications
| USB-Powered Test Equipment | Portable Medical Sensors |
|---|---|
Use Scenario: Handheld multimeter or oscilloscope probe powered via USB-C PD (5V/9V/15V). IC Role / Device Role / Timing Role: Primary 4.4V bias regulator for analog front-end and microcontroller core. Use Value: Maintains regulation across USB PD voltage steps (5V→9V→15V) with <0.05%/V line regulation, eliminating need for pre-regulator stage. | Use Scenario: Wearable ECG patch using CR2032 coin cell (2.0–3.0V) boosted to 4.4V rail. IC Role / Device Role / Timing Role: Post-boost LDO delivering clean 4.4V to ADC and Bluetooth SoC. Use Value: 1.8µA quiescent current extends battery life to >6 months in sleep mode; 360mV dropout enables usable runtime down to 2.36V battery voltage. |
| Industrial Data Loggers | Automotive Cabin Sensors |
Use Scenario: Battery-backed environmental logger deployed in remote field locations (−40°C to +85°C). IC Role / Device Role / Timing Role: Main system regulator supplying 4.4V to MCU, flash memory, and temperature/humidity sensors. Use Value: ±100ppm/°C tempco and ±1% accuracy ensure sensor calibration integrity across full operating range without software compensation. | Use Scenario: Occupancy sensor module connected to 12V vehicle bus with load dump protection. IC Role / Device Role / Timing Role: Secondary regulator deriving 4.4V from protected 12V rail for IR emitter/detector and signal conditioning. Use Value: 30V input rating withstands ISO 7637-2 pulse 5a (200ms, +35V); thermal shutdown prevents failure during prolonged engine-off battery drain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-4402E/MB | 250mV dropout @ 250mA; 2.5µA IQ; SOT23-5 package; no thermal shutdown | Lacks thermal protection; higher dropout limits use with lower VIN sources | Choose when thermal shutdown is not required and input headroom is constrained below 4.65V |
| TPS7A2044PDBVR | 175mV dropout @ 300mA; 2.5µA IQ; 1.5% accuracy; no current limit | Higher accuracy tolerance; lacks integrated current limiting | Prefer for ultra-low-noise analog rails where external current limiting is acceptable |
Compared with MCP1703T-4402E/MB and TPS7A2044PDBVR, the AP7383-44WW-7 uniquely combines 30V input capability, thermal shutdown, and 150mA current limit in a cost-optimized SOT25 package-making it optimal for ruggedized portable instrumentation where fault resilience and wide VIN are non-negotiable.
Availability
AP7383-44WW-7 is available at Aetrix Electronics and suitable for USB-powered test equipment, portable medical sensors, and industrial data loggers requiring stable component supply with guaranteed long-term availability.
Supply support for AP7383-44WW-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 centers in Asia, Europe, and the U.S., serving industrial, computing, and consumer markets.
The AP7383 series belongs to Diodes' high-voltage ULDO regulator product line, engineered specifically for battery-powered and wide-input industrial applications demanding low IQ, robust thermal protection, and fixed-output simplicity.
FAQ
What is the minimum input voltage required for regulation at 4.4V output?
The AP7383-44WW-7 requires a minimum input voltage of 4.76V to maintain regulation at full 150mA load, based on its typical 360mV dropout at 50mA and worst-case 580mV dropout per datasheet. At light loads (<1mA), regulation begins at VIN ≥ 4.42V due to lower dropout.
Can the AP7383-44WW-7 be used with ceramic output capacitors smaller than 1µF?
No-Diodes specifies 1µF ceramic capacitors (X5R/X7R) for both input and output to ensure stability across temperature and load. Using <1µF risks oscillation or poor transient response, as confirmed by phase margin testing in DS40699 Rev. 8-2 Section 8.2.
Is the EN pin internally pulled up or down?
The EN pin has no internal pull-up or pull-down; it is a high-impedance CMOS input requiring an external logic signal. The datasheet defines "High" as ≥2.0V and "Low" as ≤0.4V, with leakage current ≤1µA-so a 100kΩ pull-up to VIN is recommended for default-enable operation.
Does the AP7383-44WW-7 support reverse polarity protection?
No-the device lacks integrated reverse-polarity protection. Applying reversed voltage to VIN or VOUT may cause permanent damage. External protection (e.g., series Schottky diode or ideal diode controller) is required in applications with potential reverse-battery or hot-swap conditions.
AP7383-44WW-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):
- 4.4V
- 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:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP7383-44WW-7 FAQ
1.How can I place an order for AP7383-44WW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7383-44WW-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 AP7383-44WW-7 reliable?
The price and inventory of AP7383-44WW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7383-44WW-7 is usually 5 days.
3.What payment methods are accepted for AP7383-44WW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7383-44WW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7383-44WW-7?
AP7383-44WW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7383-44WW-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 AP7383-44WW-7?
For technical support, including AP7383-44WW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7383-44WW-7 requirements.
6.How does Aetrix verify that AP7383-44WW-7 is sourced from the original manufacturer or authorized distributors?
All AP7383-44WW-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 AP7383-44WW-7 meets industry standards.
7.What is the process for return or replacement of AP7383-44WW-7?
All AP7383-44WW-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7383-44WW-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 AP7383-44WW-7 part is unused and in its original packaging.
Return procedure for AP7383-44WW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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