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Diodes Incorporated AP7383-18WR-7
- Part No.:
- AP7383-18WR-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7383-18WR-7.pdf
- Description:
- IC REG LIN 1.8V SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:4,869
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Product details
Overview
AP7383-18WR-7 from Diodes Incorporated is a 1.8 V fixed-output, wide-input (3.5–30 V), 150 mA ultra-low dropout (ULDO) linear regulator in SOT25 (WR) package. It delivers ±1% output voltage accuracy, 500 mV dropout at 50 mA, 1.8 µA ground current at zero load, and integrated thermal shutdown - enabling reliable power for USB peripherals, portable instrumentation, and battery-backed subsystems.
For engineers reviewing the AP7383-18WR-7 datasheet, AP7383-18WR-7 pinout, AP7383-18WR-7 application, or AP7383-18WR-7 equivalent, key selection criteria include input voltage range compatibility, dropout behavior under 150 mA load, thermal performance in SOT25 WR package, and enable-pin functionality for power sequencing in space-constrained designs.
Technical Context
The AP7383-18WR-7 implements a precision bandgap reference, error amplifier, and resistor network to regulate 1.8 V output with ±1% tolerance across -40°C to +125°C junction temperature. Its internal current-limit circuit protects against overloads up to 200 mA absolute maximum, while thermal shutdown activates at +160°C with +20°C hysteresis.
It operates with low-ESR ceramic capacitors (1 µF input/output), supports enable control (EN pin logic-high ≥2.0 V, logic-low ≤0.4 V), and maintains 0.05%/V line regulation and 0.5% load regulation - making it suitable for dynamically varying input sources like automotive USB ports or multi-cell battery rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V ±1% - ensures stable core voltage for 1.8 V I/O interfaces and low-power MCUs |
| Input Voltage Range | 3.5 V to 30 V - supports direct connection to 12 V/24 V industrial rails or multi-cell Li-ion batteries |
| Max Output Current | 150 mA - sufficient for powering sensor nodes, RF transceivers, or small FPGA I/O banks |
| Dropout Voltage | 360–580 mV @ 50 mA - enables regulation down to VIN = 2.36 V, critical for battery end-of-life operation |
| Ground Current | 1.8 µA @ IOUT = 0 mA - minimizes quiescent drain in always-on monitoring circuits |
| Enable Threshold | VEN(HI) ≥ 2.0 V, VEN(LO) ≤ 0.4 V - compatible with 1.8 V/3.3 V GPIO without level-shifting |
| Thermal Shutdown | Activates at +160°C with +20°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking |
Pinout & Package
SOT25 (WR package) - 5-pin surface-mount package with exposed pad for thermal enhancement; footprint compatible with JEDEC MO-203-AB standard; moisture sensitivity level 1 (J-STD-020).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply pin; accepts 3.5–30 V; requires 1 µF ceramic decoupling capacitor |
| 2 | GND | Analog/digital ground reference; must be connected to low-impedance PCB ground plane |
| 3 | VOUT | Regulated 1.8 V output; drives load and 1 µF output capacitor; sensitive to trace inductance |
| 4 | NC | No internal connection; recommended to tie to GND for improved thermal dissipation and EMI suppression |
| 5 | EN | Active-high enable input; pulls device into ultra-low standby mode (<0.01 µA) when driven low |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range (3.5–30 V) | Eliminates need for pre-regulation stages in 12 V/24 V systems or multi-cell battery inputs |
| Ultra-Low Quiescent Current (1.8 µA) | Extends battery life in always-on IoT sensors and wearable health monitors |
| Low Dropout (360 mV @ 50 mA) | Enables full 1.8 V output even as input drops to 2.16 V - critical for single-cell LiFePO₄ or aging alkaline cells |
| Thermal Shutdown with Hysteresis | Prevents thermal runaway during transient overloads while avoiding oscillation near trip point |
| Enable Pin with TTL-Compatible Logic | Allows precise power sequencing in multi-rail systems using standard microcontroller GPIO |
Applications
| USB-Powered Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Compact wearable device measuring heart rate and SpO₂, powered via USB-C port with variable 4.75–5.5 V input. IC Role / Device Role / Timing Role: Primary 1.8 V LDO supplying analog front-end and BLE SoC I/O domain. Use Value: Maintains regulation down to 2.36 V input, ensuring uninterrupted operation during USB cable flex-induced voltage dips. | Use Scenario: Handheld blood glucose meter using two AAA alkaline cells (1.8–3.2 V) with LCD backlight and Bluetooth LE. IC Role / Device Role / Timing Role: Stable 1.8 V rail for MCU core and precision ADC reference. Use Value: 1.8 µA quiescent current extends shelf life; ±1% accuracy ensures consistent ADC gain calibration across temperature. |
| Industrial Data Logger | Smart Home Hub Controller |
Use Scenario: Battery-backed environmental logger deployed in remote locations, operating from 3.6 V Li-SOCl₂ primary cell or 12 V field bus. IC Role / Device Role / Timing Role: Secondary LDO generating clean 1.8 V for real-time clock and nonvolatile memory interface. Use Value: 30 V max input withstands 12 V bus transients; thermal shutdown prevents failure during extended high-temperature deployments. | Use Scenario: Wi-Fi/Zigbee hub with multiple radios, requiring independent 1.8 V rails for RF transceiver I/O and secure element. IC Role / Device Role / Timing Role: Enable-controlled LDO enabling dynamic power gating of peripheral subsystems. Use Value: EN pin allows MCU to disable unused radios, reducing system idle current by >10 µA per channel. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-1802E/MB | 1.8 V, 250 mA, 600 mV dropout @ 250 mA, no enable pin, SOT23-5 package | Lacks EN control; higher dropout reduces usable input range in low-VIN scenarios | Select only if enable functionality is unnecessary and higher current headroom is required |
| TPS7A2018PDQNR | 1.8 V, 300 mA, 170 mV dropout @ 300 mA, enable pin, X2SON-4 package (no NC pin) | Lower dropout and smaller footprint, but lacks NC pin for thermal optimization and has tighter 2.2–6.0 V input range | Prefer for space-constrained, low-dropout designs where input never exceeds 6 V |
Compared with MCP1703T-1802E/MB and TPS7A2018PDQNR, the AP7383-18WR-7 uniquely balances wide 30 V input capability, enable control, thermal robustness via NC-to-GND option, and ultra-low IQ - making it optimal for mixed-voltage industrial and battery-harvesting systems where input uncertainty and standby efficiency are critical.
Availability
AP7383-18WR-7 is available at Aetrix Electronics and suitable for USB-powered instrumentation, portable medical devices, and industrial data loggers requiring stable component supply with long-term lifecycle assurance.
Supply support for AP7383-18WR-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 manufacturing certified to IATF 16949 and product compliance to AEC-Q200.
The AP7383 series belongs to Diodes' high-reliability linear regulator product line, engineered specifically for battery-powered and wide-input industrial applications demanding precision, low IQ, and robust thermal protection.
FAQ
What is the minimum input voltage required for regulation at 1.8 V output?
The AP7383-18WR-7 requires VIN ≥ VOUT + VDROP. At 50 mA load, dropout is 360–580 mV, so minimum functional input is 2.16–2.38 V. The datasheet specifies 3.5 V as the absolute minimum recommended operating input to ensure stability, margin, and full specification compliance across temperature and process variation.
Can the NC pin be left floating?
No - the NC pin (Pin 4) is not internally connected but must be tied to GND on the PCB. This improves thermal dissipation by maximizing copper area under the package and reduces EMI susceptibility. Leaving it floating may degrade thermal performance and increase noise coupling into the sensitive feedback path.
Does the AP7383-18WR-7 support ceramic output capacitors?
Yes - it is explicitly designed for low-ESR ceramic capacitors (1 µF typical). Unlike older LDOs, it does not require minimum ESR for stability and remains unconditionally stable with 0.5–10 µF X5R/X7R ceramics, simplifying layout and reducing BOM count compared to tantalum or aluminum electrolytic solutions.
How does thermal shutdown behave during continuous overload?
When junction temperature reaches +160°C, the device shuts down output and enters thermal shutdown. It remains off until temperature falls by ≥20°C (hysteresis), then automatically resumes regulation. This prevents latch-up and enables self-recovery after transient overloads - unlike latch-off protection that requires external reset.
AP7383-18WR-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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- 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
AP7383-18WR-7 FAQ
1.How can I place an order for AP7383-18WR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7383-18WR-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 AP7383-18WR-7 reliable?
The price and inventory of AP7383-18WR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7383-18WR-7 is usually 5 days.
3.What payment methods are accepted for AP7383-18WR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7383-18WR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7383-18WR-7?
AP7383-18WR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7383-18WR-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 AP7383-18WR-7?
For technical support, including AP7383-18WR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7383-18WR-7 requirements.
6.How does Aetrix verify that AP7383-18WR-7 is sourced from the original manufacturer or authorized distributors?
All AP7383-18WR-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 AP7383-18WR-7 meets industry standards.
7.What is the process for return or replacement of AP7383-18WR-7?
All AP7383-18WR-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7383-18WR-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 AP7383-18WR-7 part is unused and in its original packaging.
Return procedure for AP7383-18WR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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