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Diodes Incorporated AP7383-345WR-7
- Part No.:
- AP7383-345WR-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7383-345WR-7.pdf
- Description:
- LDO CMOS LOWCURR SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:3,872
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Product details
Overview
AP7383-345WR-7 from Diodes Incorporated is a fixed-output 3.45V, 150mA ultra-low dropout (ULDO) linear regulator in SOT25 (WR) package. It delivers ±1% output voltage accuracy over load, line, and temperature, with 500mV dropout at 50mA, 1.8µA ground current at zero load, and thermal shutdown protection-designed for USB-powered instrumentation and portable battery systems.
For engineers reviewing the AP7383-345WR-7 datasheet, AP7383-345WR-7 pinout, AP7383-345WR-7 application, or AP7383-345WR-7 equivalent, key selection criteria include input voltage range (3.5–30V), dropout behavior at 150mA, EN pin control logic, thermal resistance (166°C/W), and compatibility with 1µF ceramic output capacitors.
Technical Context
The AP7383-345WR-7 integrates a precision voltage reference, error amplifier, resistor network for fixed 3.45V output, current-limit circuit (150mA typical), and enable input with 2.0V high-threshold and 0.4V low-threshold. Its architecture supports stable regulation under fast load transients without external compensation.
It operates across –40°C to +125°C junction temperature, features ±100ppm/°C output voltage temperature coefficient, and maintains 0.05%/V line regulation and 0.5% load regulation-enabling reliable power delivery in wide-input industrial and portable environments where input rails vary significantly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.45V ±1% - ensures precise biasing for 3.3V-tolerant logic and analog sensors |
| Max Input Voltage | 30V - supports direct connection to unregulated 24V industrial rails or automotive battery inputs |
| Dropout Voltage | 360–580mV @ 50mA - enables regulation down to VIN = 3.81V, critical for single-cell Li-ion or multi-cell alkaline operation |
| Ground Current | 1.8–3.0µA @ IOUT = 0–150mA - minimizes quiescent power loss in always-on battery backup circuits |
| Enable Threshold | VEN(HI) = 2.0V, VEN(LO) = 0.4V - compatible with 1.8V/3.3V GPIOs for controlled power sequencing |
| Thermal Shutdown | 160°C activation with 20°C hysteresis - prevents latch-up during sustained overload or poor PCB heatsinking |
| ESD Rating | HBM 2500V, MM 250V - provides robust handling margin during board assembly and field service |
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 3.5–30V; requires local 1µF ceramic decoupling |
| 2 | GND | Analog/digital ground reference; must be low-impedance connection to minimize noise coupling |
| 3 | VOUT | Regulated 3.45V output; connects directly to load; stable with ≥1µF ceramic capacitor |
| 4 | NC | No internal connection; recommended to tie to GND for thermal enhancement on PCB copper pour |
| 5 | EN | Active-high enable input; pulls device into ultra-low standby current (0.01µA) when held ≤0.4V |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range (3.5–30V) | Eliminates need for pre-regulation stages in mixed-voltage systems like industrial gateways |
| Ultra-low quiescent current (1.8µA) | Extends battery life in IoT edge nodes operating >1 year on coin cells or primary lithium |
| Low ESR capacitor compatibility | Enables use of compact, low-cost 1µF X5R/X7R ceramics instead of larger tantalum or electrolytic caps |
| Thermal shutdown with hysteresis | Prevents thermal runaway during short-circuit events while allowing automatic recovery after cooling |
| ±1% output accuracy | Meets tight tolerance requirements for ADC references, sensor excitation, and RF front-end biasing |
Applications
| Portable Medical Sensors | Industrial Data Loggers |
|---|---|
Use Scenario: Wearable pulse oximeter powered by CR2032 coin cell with variable input due to battery discharge. IC Role / Device Role / Timing Role: Primary 3.45V power rail regulator enabling consistent LED drive and ADC reference voltage. Use Value: 1.8µA ground current extends operational life beyond 18 months; 500mV dropout sustains regulation until battery drops to 3.95V. | Use Scenario: Battery-backed environmental monitor deployed in remote substations with 24V DC plant supply and occasional brownouts. IC Role / Device Role / Timing Role: Clean 3.45V supply for microcontroller, real-time clock, and RS-485 transceiver. Use Value: 30V max input withstands load-dump transients; thermal shutdown protects during enclosure overheating. |
| USB-C Powered Test Equipment | Automotive Body Control Modules |
Use Scenario: Handheld oscilloscope accessory drawing power from USB-C PD source (5–20V). IC Role / Device Role / Timing Role: Post-regulator converting variable USB-C voltage to stable 3.45V for analog front-end and FPGA I/O banks. Use Value: Excellent line regulation (0.05%/V) ensures signal integrity across full USB-C input range; EN pin enables firmware-controlled sleep mode. | Use Scenario: Low-power door module using 12V vehicle battery with cold-crank dips to 6V and load-dump spikes to 35V. IC Role / Device Role / Timing Role: Secondary LDO supplying 3.45V to CAN transceiver and wake-up controller. Use Value: Absolute max 33V input rating survives load-dump; 150mA current limit prevents fuse blow during shorted sensor lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-3302E/MB | 3.3V fixed output, 250mV dropout @ 250mA, 2.5µA IQ, no EN pin | Lacks enable control and thermal shutdown; tighter 3.3V output unsuitable for 3.45V-referenced circuits | Select only if system requires 3.3V and can tolerate missing EN functionality and reduced fault protection |
| Torex XC6219B345MR-G | 3.45V output, 200mA, 1.25µA IQ, 350mV dropout @ 100mA, EN pin, no thermal shutdown | Lower dropout and IQ but lacks thermal protection; smaller UDFN-4 package limits thermal dissipation | Preferred for space-constrained designs where thermal risk is mitigated externally and 200mA headroom is needed |
Compared with MCP1703T-3302E/MB and XC6219B345MR-G, the AP7383-345WR-7 uniquely combines 3.45V precision, integrated thermal shutdown, and EN control in a thermally robust SOT25 package-making it optimal for safety-critical portable and industrial applications requiring both accuracy and fault resilience.
Availability
AP7383-345WR-7 is available at Aetrix Electronics and suitable for battery-powered instrumentation, USB-C peripheral power management, and industrial data acquisition systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for AP7383-345WR-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 manufacturer specializing in discrete, analog, and mixed-signal solutions, with design centers across Asia, Europe, and the US, serving industrial, computing, communications, and consumer markets.
The AP7383 series belongs to Diodes' high-reliability ULDO regulator product line, engineered specifically for battery-sensitive and wide-input applications where low quiescent current, precision output, and robust protection features are mandatory.
FAQ
What is the minimum input voltage required for regulation at full 150mA load?
The AP7383-345WR-7 requires VIN ≥ VOUT + VDROP. At 150mA, typical dropout is 1050mV (max 1500mV), so minimum VIN = 3.45V + 1.05V = 4.5V. Operation below this causes output collapse; datasheet specifies absolute min VIN = 3.5V only for light loads.
Can the NC pin (Pin 4) be left floating on the PCB?
No-Pin 4 is internally unconnected but thermally coupled to the die. Diodes recommends tying it to GND via PCB copper pour to improve thermal dissipation. Leaving it floating reduces θJA performance and may cause premature thermal shutdown under sustained 150mA load.
Does the AP7383-345WR-7 require an input capacitor, and what value is recommended?
Yes-an input capacitor is required for stability and transient suppression. The datasheet specifies CIN = 1.0µF ceramic (X5R/X7R), placed within 5mm of VIN and GND pins. Larger values (e.g., 4.7µF) improve hold-up during input dips but are not necessary for basic operation.
Is the AP7383-345WR-7 qualified for automotive applications per AEC-Q100?
No-the AP7383-345WR-7 is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., AP7383Q series) with PPAP capability and IATF 16949 manufacturing; this WR-packaged version is intended for industrial and commercial use only.
AP7383-345WR-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):
- 3.45V
- 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
AP7383-345WR-7 FAQ
1.How can I place an order for AP7383-345WR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7383-345WR-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 AP7383-345WR-7 reliable?
The price and inventory of AP7383-345WR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7383-345WR-7 is usually 5 days.
3.What payment methods are accepted for AP7383-345WR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7383-345WR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7383-345WR-7?
AP7383-345WR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7383-345WR-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 AP7383-345WR-7?
For technical support, including AP7383-345WR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7383-345WR-7 requirements.
6.How does Aetrix verify that AP7383-345WR-7 is sourced from the original manufacturer or authorized distributors?
All AP7383-345WR-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 AP7383-345WR-7 meets industry standards.
7.What is the process for return or replacement of AP7383-345WR-7?
All AP7383-345WR-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7383-345WR-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 AP7383-345WR-7 part is unused and in its original packaging.
Return procedure for AP7383-345WR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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