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Diodes Incorporated AP7383-18WW-7
- Part No.:
- AP7383-18WW-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7383-18WW-7.pdf
- Description:
- LDO CMOS LOWCURR SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:4,761
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Product details
Overview
AP7383-18WW-7 from Diodes Incorporated is a fixed-output 1.8V, 150mA ultra-low dropout (ULDO) linear regulator in SOT25 (WW) package. It operates across 3.5V–30V input range, delivers ±1% output voltage accuracy at 10mA load, maintains 360mV dropout at 50mA, and draws only 1.8µA ground current at zero load-enabling long battery life in portable instrumentation and USB-powered sensors.
For engineers reviewing the AP7383-18WW-7 datasheet, AP7383-18WW-7 pinout, AP7383-18WW-7 application, or AP7383-18WW-7 equivalent, key selection criteria include wide VIN tolerance, thermal shutdown at +160°C, compatibility with 1µF ceramic capacitors, and EN pin control in W5 variant (not present in WW package).
Technical Context
The AP7383-18WW-7 integrates a precision voltage reference, error amplifier, resistor network for fixed 1.8V output, current-limit circuit (150mA trip), and chip enable logic-though the WW package omits the EN pin, making it a simple three-terminal regulator. Its architecture supports stable regulation under ±100ppm/°C temperature coefficient and 0.05%/V line regulation.
It features internal thermal shutdown with +20°C hysteresis, operates from –40°C to +125°C junction temperature, and uses low-ESR ceramic output capacitors without requiring ESR stabilization-eliminating need for tantalum or aluminum electrolytics in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% at 10mA - ensures stable core voltage for low-power MCUs and sensors. |
| Input Voltage Range | 3.5V to 30V - accommodates wide supply rails including automotive transients and multi-cell battery stacks. |
| Dropout Voltage | 360mV @ 50mA - enables regulation down to VIN = 2.16V, critical for single Li-ion or 2xAA operation. |
| Ground Current | 1.8µA @ IOUT = 0mA - minimizes quiescent power loss in always-on monitoring circuits. |
| Current Limit | 150mA - protects against short-circuit faults while supporting typical sensor/RF front-end loads. |
| Thermal Shutdown | +160°C with +20°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
| Line Regulation | 0.05%/V - maintains tight output stability across full input range, reducing need for post-regulation filtering. |
Pinout & Package
SOT25 (WW) package: 3-pin surface-mount, lead-free, RoHS-compliant, moisture sensitivity level 1. Thermal resistance θJA = 193°C/W on JEDEC High-K board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts up to 30V DC with transient robustness. |
| 2 | GND | Power ground reference; must be low-impedance path to minimize noise coupling. |
| 3 | VOUT | Regulated 1.8V output; requires ≥1µF ceramic capacitor placed within 3mm for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range | Supports direct connection to unregulated 12V/24V industrial rails or 3S Li-ion packs without pre-regulation. |
| Ultra-Low Quiescent Current | 1.8µA ground current enables >10-year battery life in IoT endpoint nodes with 200mAh coin cells. |
| Ceramic Capacitor Compatible | Stable with 1µF X5R/X7R ceramics-reduces BOM cost, footprint, and aging drift vs. tantalum alternatives. |
| High Accuracy Output | ±1% initial tolerance over temperature ensures reliable logic-level compliance for 1.8V I/O domains. |
| Thermal Protection | Auto-recovery shutdown prevents latch-up during thermal overload, eliminating need for external thermal sensors. |
Applications
| Portable Medical Sensors | Industrial Data Loggers |
|---|---|
Use Scenario: Continuous glucose monitor using 1.8V ADC and BLE SoC powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Primary voltage regulator supplying clean 1.8V to analog front-end and digital core. Use Value: 1.8µA quiescent current extends battery life beyond 2 years; 360mV dropout allows operation until cell voltage drops to 2.16V. | Use Scenario: Remote environmental sensor node logging temperature/humidity every 5 minutes via LoRaWAN. IC Role / Device Role / Timing Role: Power management IC regulating 1.8V rail for microcontroller and RF transceiver. Use Value: Wide 3.5–30V input handles solar-charged 12V battery variations; ±1% accuracy ensures consistent ADC reference performance. |
| USB-Powered Test Equipment | Automotive Cabin Sensors |
Use Scenario: Handheld oscilloscope probe powered via USB 5V bus with internal 1.8V logic rail. IC Role / Device Role / Timing Role: Post-regulator converting USB 5V to precise 1.8V for FPGA configuration and signal conditioning. Use Value: 0.05%/V line regulation eliminates need for additional LDO filtering; 150mA limit protects USB port during fault conditions. | Use Scenario: Occupancy sensor mounted in vehicle dashboard, powered from 12V battery with load dump protection. IC Role / Device Role / Timing Role: System power regulator delivering 1.8V to PIR sensor interface and CAN transceiver logic. Use Value: 30V max input withstands ISO 7637-2 pulse 5a (load dump); thermal shutdown prevents failure during engine bay temperature excursions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7361-18W5-7 | Same 1.8V output, but includes EN pin and higher 300mA current limit; uses same SOT25 package. | Enables power sequencing and deeper sleep modes via enable control; supports higher-current peripherals. | Select when system requires active power gating or drives >150mA loads like display drivers. |
| MCP1703T-1802E/MB | 1.8V, 250mA, 600mV dropout @ 250mA; higher quiescent current (2.5µA); different pinout (VIN-GND-VOUT). | Larger dropout reduces usable input range; higher IQ limits ultra-low-power use cases. | Choose only if legacy design compatibility with Microchip's footprint is required and 360mV dropout is not critical. |
Compared with AP7383-18WW-7, AP7361-18W5-7 adds enable functionality at no penalty to dropout or IQ, while MCP1703T-1802E/MB trades lower dropout for higher quiescent current and reduced input voltage headroom-making AP7383-18WW-7 optimal for space-constrained, battery-sensitive applications where simplicity and ultra-low IQ are primary.
Availability
AP7383-18WW-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, and USB-powered test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP7383-18WW-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AP7383 series belongs to Diodes' ultra-low dropout linear regulator product line, designed specifically for battery-powered and wide-input industrial applications demanding precision, low IQ, and robust thermal behavior.
FAQ
What is the maximum input voltage rating for AP7383-18WW-7?
The absolute maximum input voltage is 33V, but the recommended operating range is 3.5V to 30V. Exceeding 30V risks violating safe operating area limits and may trigger thermal shutdown before reaching 33V. Designers should maintain ≥2V headroom above 1.8V output for guaranteed regulation and consider transient suppression for automotive or industrial environments.
Does AP7383-18WW-7 require an external enable signal?
No-the WW package variant has no EN pin and operates continuously when VIN is applied. Pinout is strictly VIN-GND-VOUT. If enable functionality is needed, AP7383-18W5-7 (same specs, SOT25 W5 package with EN on pin 3) must be selected instead; the two are not pin-compatible.
Can AP7383-18WW-7 be used with ceramic output capacitors smaller than 1µF?
No-Diodes specifies minimum 1µF ceramic (X5R/X7R) at VOUT for stability across all operating conditions. Using <1µF risks oscillation or poor transient response, especially under load steps. The device is not characterized for smaller values, and layout parasitics further reduce effective capacitance.
What is the thermal performance of AP7383-18WW-7 in SOT25 (WW) package?
In the SOT25 WW package, θJA is 193°C/W on JEDEC High-K board. At 150mA load and 30V input, power dissipation reaches ~4.2W, raising junction temperature by ~810°C above ambient-exceeding safe limits. Derating is mandatory: max continuous load is ~50mA at 30V or full 150mA only below 10V input, with adequate copper pour and airflow.
AP7383-18WW-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:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP7383-18WW-7 FAQ
1.How can I place an order for AP7383-18WW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7383-18WW-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 AP7383-18WW-7 reliable?
The price and inventory of AP7383-18WW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7383-18WW-7 is usually 5 days.
3.What payment methods are accepted for AP7383-18WW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7383-18WW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7383-18WW-7?
AP7383-18WW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7383-18WW-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 AP7383-18WW-7?
For technical support, including AP7383-18WW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7383-18WW-7 requirements.
6.How does Aetrix verify that AP7383-18WW-7 is sourced from the original manufacturer or authorized distributors?
All AP7383-18WW-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 AP7383-18WW-7 meets industry standards.
7.What is the process for return or replacement of AP7383-18WW-7?
All AP7383-18WW-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7383-18WW-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 AP7383-18WW-7 part is unused and in its original packaging.
Return procedure for AP7383-18WW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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