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Diodes Incorporated AP7347DQ-18W5-7
- Part No.:
- AP7347DQ-18W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7347DQ-18W5-7.pdf
- Description:
- LDO CMOS LOWCURR SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:4,281
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Product details
Overview
AP7347DQ-18W5-7 from Diodes Incorporated is an automotive-grade 1.8V fixed-output, 500mA low-dropout linear regulator with ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). It features enable control, thermal shutdown, short-circuit protection, and auto-discharge functionality-designed for noise-sensitive power rails in ADAS camera modules and infotainment systems.
For engineers reviewing the AP7347DQ-18W5-7 datasheet, AP7347DQ-18W5-7 pinout, AP7347DQ-18W5-7 application, or AP7347DQ-18W5-7 equivalent, this LDO delivers high PSRR, ultra-low quiescent current (60µA), AEC-Q100 qualification, and dual-package support (SOT25/WDFN2020-6) for space-constrained automotive PCBs.
Technical Context
The AP7347DQ-18W5-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and thermal shutdown logic. Its internal architecture supports fast load transient response (<10µs settling) and stable operation with only 1µF ceramic input/output capacitors.
It implements active discharge via an internal N-channel MOSFET (RON = 30Ω) when disabled, ensuring rapid VOUT decay. The EN pin accepts logic-level control (VIL ≤ 0.5V, VIH ≥ 1.25V), and the device operates across -40°C to +125°C ambient with junction temperature up to +150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% - ensures stable core voltage for 1.8V logic rails without external feedback network. |
| Max Output Current | 500mA - sufficient to power multiple automotive sensors or RF ICs from a single LDO stage. |
| PSRR | 75dB at 1kHz - suppresses switching noise from upstream DC/DC converters in mixed-signal domains. |
| Output Noise | 60µVrms (10Hz–100kHz) - enables clean analog/RF supply for camera ISPs and wireless transceivers. |
| Quiescent Current | 60µA typical - minimizes standby power loss in always-on automotive subsystems. |
| Dropout Voltage | 0.27V at 500mA (for 1.8V VOUT) - allows operation from 2.07V input, supporting wide VIN range (1.7–5.5V). |
| Enable Threshold | VEN(H) ≥ 1.25V, VEN(L) ≤ 0.5V - compatible with 1.8V/3.3V GPIOs without level-shifting. |
Pinout & Package
SOT25 (Type A1) package: 5-pin surface-mount with exposed pad not present; compact 2.9mm × 2.8mm footprint optimized for dense automotive PCB layouts.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input power pin; requires local 1µF ceramic decoupling capacitor placed adjacent to minimize impedance. |
| 2 | EN | Active-high enable control; must be driven to defined logic levels-floating prohibited to avoid erratic regulation. |
| 3 | GND | Analog/digital ground reference; connects directly to PCB ground plane for low-noise stability. |
| 4 | VOUT | Regulated 1.8V output; routed with short, wide trace to load to preserve PSRR and transient response. |
| 5 | NC | No-connect terminal; recommended to tie to GND for improved thermal dissipation and EMI shielding. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Qualified to Grade 1 (-40°C to +125°C), PPAP-capable, manufactured in IATF 16949-certified facilities for automotive production use. |
| Auto-discharge function | Internal 30Ω N-channel FET discharges VOUT when disabled-prevents floating rail during sleep mode in ADAS cameras. |
| Low-noise design | 60µVrms noise floor enables direct powering of RF front-ends and image signal processors without additional filtering. |
| Thermal protection | 170°C shutdown threshold with 20°C hysteresis prevents latch-up during sustained overload or poor heatsinking. |
| Wide input range | 1.7V to 5.5V operation supports direct connection to battery-supplied rails (e.g., 3.3V or 5V pre-regulators) in multi-rail systems. |
Applications
| Infotainment Power Supply | ADAS Camera Module |
|---|---|
Use Scenario: Powering audio DSPs, touch controllers, and display interface ICs in head-unit systems. IC Role / Device Role / Timing Role: Primary low-noise post-regulator delivering stable 1.8V to noise-sensitive digital cores. Use Value: 75dB PSRR rejects ripple from buck converters feeding the infotainment domain, reducing audible noise and display artifacts. |
Use Scenario: Supplying image sensor and ISP in forward-facing driver-assistance cameras. IC Role / Device Role / Timing Role: Fixed 1.8V bias source for MIPI CSI-2 interface logic and pixel processing blocks. Use Value: 60µVrms noise ensures minimal SNR degradation in high-dynamic-range imaging under low-light conditions. |
| Automotive RF Supply | Wireless Communication System |
Use Scenario: Providing clean 1.8V to GNSS receivers, LTE/V2X transceivers, and Bluetooth modules. IC Role / Device Role / Timing Role: Dedicated LDO for RF analog front-end and synthesizer biasing. Use Value: Ultra-low output noise prevents phase noise degradation and maintains EVM compliance in cellular modems. |
Use Scenario: Powering UWB anchors, Wi-Fi 6/6E coexistence modules, and telematics gateways. IC Role / Device Role / Timing Role: Enable-controlled 1.8V rail for selective subsystem wake-up and low-power idle states. Use Value: 60µA quiescent current extends battery-backed runtime in keyless entry and remote diagnostics functions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TJA1044T/3 | 5V-input CAN transceiver with integrated 3.3V LDO (200mA); no 1.8V option, higher IQ (120µA), no auto-discharge. | Designed for CAN FD physical layer-not suitable as standalone 1.8V regulator; lacks noise/PSRR specs for RF use. | Select only if CAN interface integration is required alongside regulated 3.3V; not a functional substitute for AP7347DQ-18W5-7. |
| TPS78018QDDCRQ1 | 1.8V/200mA automotive LDO (AEC-Q100), 30µA IQ, 45dB PSRR @ 1kHz, no auto-discharge, SOT-23-5 package. | Limited output current and PSRR make it unsuitable for 500mA camera or RF loads requiring >70dB noise rejection. | Use where ultra-low IQ dominates over noise/PSRR requirements and load current <200mA; not drop-in for AP7347DQ-18W5-7's performance tier. |
Compared with TJA1044T/3 and TPS78018QDDCRQ1, the AP7347DQ-18W5-7 uniquely combines 500mA drive, 75dB PSRR, 60µVrms noise, and auto-discharge in a qualified automotive LDO-enabling single-chip solutions for demanding ADAS and connectivity rails where competing parts compromise on current, noise, or integration.
Availability
AP7347DQ-18W5-7 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, RF subsystems, and wireless communication systems requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle assurance.
Supply support for AP7347DQ-18W5-7 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 devices, with manufacturing certified to IATF 16949 and product qualification aligned to AEC-Q100/200 standards.
The AP7347DQ series belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for noise-critical power domains in ADAS, infotainment, and vehicle connectivity systems where PSRR, output accuracy, and thermal robustness are non-negotiable.
FAQ
What is the maximum allowable input voltage for AP7347DQ-18W5-7?
The absolute maximum input voltage is 6.0V per the datasheet Absolute Maximum Ratings table. Continuous operation above 5.5V violates Recommended Operating Conditions and risks permanent damage. For reliable 1.8V output, VIN must remain ≥2.07V (VOUT + dropout) and ≤5.5V under all operating temperatures and load conditions.
Does AP7347DQ-18W5-7 require an external discharge resistor?
No. The device integrates an internal N-channel MOSFET (RON ≈ 30Ω) that actively discharges VOUT when EN is pulled low. This eliminates need for external resistors, reduces BOM count, and ensures predictable discharge timing-critical for sequencing in automotive power domains.
Can AP7347DQ-18W5-7 operate with ceramic output capacitors smaller than 1µF?
Stability is guaranteed with ≥1µF ceramic capacitors (X5R/X7R) per the datasheet Application Information section. Using smaller values may cause instability or degraded transient response. The 1µF minimum ensures adequate phase margin and meets ESR requirements across temperature and bias conditions.
Is the NC pin on AP7347DQ-18W5-7 electrically isolated?
Yes-the NC pin is not connected internally. Per the Pin Descriptions table, it is recommended to connect it to GND on the PCB to enhance thermal dissipation and reduce EMI coupling. Leaving it floating is allowed but forfeits thermal and shielding benefits in high-density layouts.
AP7347DQ-18W5-7 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):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.55V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 125 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP7347DQ-18W5-7 FAQ
1.How can I place an order for AP7347DQ-18W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7347DQ-18W5-7 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 AP7347DQ-18W5-7 reliable?
The price and inventory of AP7347DQ-18W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7347DQ-18W5-7 is usually 5 days.
3.What payment methods are accepted for AP7347DQ-18W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7347DQ-18W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7347DQ-18W5-7?
AP7347DQ-18W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7347DQ-18W5-7 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 AP7347DQ-18W5-7?
For technical support, including AP7347DQ-18W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7347DQ-18W5-7 requirements.
6.How does Aetrix verify that AP7347DQ-18W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7347DQ-18W5-7 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 AP7347DQ-18W5-7 meets industry standards.
7.What is the process for return or replacement of AP7347DQ-18W5-7?
All AP7347DQ-18W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7347DQ-18W5-7, 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 AP7347DQ-18W5-7 part is unused and in its original packaging.
Return procedure for AP7347DQ-18W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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