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Diodes Incorporated AP7347DQ-18FDZW-7
- Part No.:
- AP7347DQ-18FDZW-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
AP7347DQ-18FDZW-7.pdf
- Description:
- LDO CMOS LOWCURR W-DFN2020-6 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:2,749
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Product details
Overview
AP7347DQ-18FDZW-7 from Diodes Incorporated is an automotive-grade 1.8V fixed-output low-dropout linear regulator delivering 500mA output current 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-18FDZW-7 datasheet, AP7347DQ-18FDZW-7 pinout, AP7347DQ-18FDZW-7 application, or AP7347DQ-18FDZW-7 equivalent, key selection criteria include its AEC-Q100 qualification, WDFN2020-6 wettable flank package, 0.14–0.32V dropout at 500mA (for VOUT = 1.8V), 60µA quiescent current, and integrated EN-controlled shutdown with 0.01µA standby current.
Technical Context
The AP7347DQ-18FDZW-7 implements a CMOS-based LDO architecture with internal voltage reference, error amplifier, current-limit circuit, and thermal shutdown. Its fixed 1.8V output is set by an on-chip resistor network, eliminating external feedback components.
It supports input voltages from 1.7V to 5.5V and delivers stable regulation across –40°C to +125°C ambient, with junction temperature up to +150°C. The device includes auto-discharge via a 30Ω N-channel FET when disabled, ensuring rapid VOUT decay to prevent system latch-up during power sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% - ensures precise rail generation for 1.8V I/O or core logic without external resistors. |
| Max Output Current | 500mA - sufficient to power multiple automotive sensors or RF ICs from a single LDO. |
| PSRR | 75dB at 1kHz - suppresses switching noise from upstream DC/DC converters in mixed-power-supply systems. |
| Output Noise | 60µVrms (10Hz–100kHz) - enables clean analog/RF supply for camera image signal processors and transceivers. |
| Quiescent Current | 60µA typical - minimizes battery drain in always-on automotive subsystems like telematics wake-up circuits. |
| Dropout Voltage | 0.27V max at 500mA (for 1.8V output) - allows operation from 2.07V input, supporting wide VIN range in start-stop vehicle systems. |
| Enable Threshold | VEN(HI) ≥ 1.25V, VEN(LO) ≤ 0.5V - compatible with 1.8V/3.3V GPIOs for controlled power sequencing. |
| Thermal Shutdown | 170°C threshold with 20°C hysteresis - protects against sustained overload in compact automotive PCB layouts. |
Pinout & Package
AP7347DQ-18FDZW-7 uses the W-DFN2020-6 (SWP) wettable flank package (2.0mm × 2.0mm, 0.75mm height), optimized for automated optical inspection (AOI) and high-density automotive PCBs. The exposed pad (EP) must be connected to GND for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Regulated 1.8V output - connect directly to load with low-impedance ceramic capacitor (≥1µF) placed adjacent to pin. |
| 2, 5 | NC | No-connect terminals - recommended to tie to GND for enhanced thermal dissipation and EMI shielding. |
| 3 | GND | Power ground reference - must be routed to solid ground plane with minimal trace length to reduce noise coupling. |
| 4 | EN | Active-high enable - drives regulator ON/OFF; floating state prohibited; requires defined logic level per datasheet thresholds. |
| 6 | VIN | Input supply (1.7–5.5V) - decoupled with ≥1µF ceramic capacitor placed within 2mm of pin to suppress input transients. |
| EP | Exposed Pad | Thermal path - must be soldered to large GND copper area (≥40mm²) for θJA = 54°C/W and reliable 500mA operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for –40°C to +125°C ambient operation - meets automotive reliability and change-control requirements. |
| Auto-discharge function | 30Ω internal N-FET discharges VOUT when EN = LOW - eliminates hold-up voltage that could disrupt downstream logic reset timing. |
| Low-noise CMOS design | 60µVrms noise floor - avoids interference with sensitive analog blocks like ADCs, PLLs, and RF receivers in ADAS systems. |
| Wettable flank package | W-DFN2020-6 (SWP) - enables AOI-compatible solder joint inspection critical for zero-defect automotive manufacturing. |
| High PSRR at low frequency | 75dB @ 1kHz - rejects ripple from buck converter switching frequencies (e.g., 500kHz fundamental harmonics) before they couple into analog rails. |
| Ultra-low quiescent current | 60µA typical - extends battery life in always-on domains such as CAN gateway wake detection and intrusion monitoring. |
Applications
| ADAS Camera Power | Infotainment SoC Core Rail |
|---|---|
|
Use Scenario: Powering image signal processor (ISP) and MIPI CSI-2 interface in forward-facing ADAS cameras. IC Role / Device Role / Timing Role: Provides ultra-low-noise 1.8V supply for ISP I/O and serializer PHY, synchronized with master clock domain. Use Value: 60µVrms noise prevents pixel-level artifacts; 500mA capacity supports dual-lane MIPI operation under full frame rate. |
Use Scenario: Delivering stable 1.8V core voltage to application processors in head-unit infotainment systems. IC Role / Device Role / Timing Role: Regulates post-buck intermediate rail for SoC core logic, enabling dynamic voltage scaling during UI rendering. Use Value: 75dB PSRR isolates SoC from DC/DC switching noise; ±1% accuracy ensures consistent CPU performance across temperature. |
| Automotive RF Transceiver Supply | Telematics GNSS Front-End |
|
Use Scenario: Biasing 5G-V2X or Wi-Fi 6E transceivers requiring clean 1.8V analog supply in telematics control units. IC Role / Device Role / Timing Role: Supplies low-phase-noise LDO rail for RF synthesizer and mixer bias networks. Use Value: 60µVrms noise prevents reciprocal mixing degradation; 0.27V dropout enables use with 2.07V backup battery input. |
Use Scenario: Powering GNSS RF front-end and baseband ASIC in automotive navigation modules. IC Role / Device Role / Timing Role: Generates low-noise 1.8V rail for GPS/Galileo L1-band LNAs and correlator logic. Use Value: AEC-Q100 qualification ensures reliability in hot under-hood environments; 60µA IQ preserves battery during parking mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output automotive LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS74518PQWDRBRQ1 | Lower IQ (25µA), higher PSRR (80dB @ 1kHz), but only 300mA output and larger 2.5mm × 2.5mm SON package. | Better suited for ultra-low-power always-on nodes, but insufficient for 500mA camera ISPs. | Select if IQ <30µA is mandatory and load current ≤300mA; avoid for ADAS camera power. |
| NCP114AMX18T2G | Non-automotive grade (no AEC-Q100), 300mA output, 50µVrms noise, SOT-563 package - lacks wettable flanks and thermal robustness. | Acceptable for non-safety-critical consumer-tier modules, but fails PPAP and IATF 16949 traceability requirements. | Use only in cost-sensitive non-automotive designs; not compliant for OEM production. |
Compared with TPS74518PQWDRBRQ1 and NCP114AMX18T2G, the AP7347DQ-18FDZW-7 uniquely balances 500mA delivery, AEC-Q100 compliance, wettable flank inspection capability, and 60µVrms noise - making it the only option validated for high-current, safety-aware ADAS camera power rails.
Availability
AP7347DQ-18FDZW-7 is available at Aetrix Electronics and suitable for automotive ADAS camera power, infotainment SoC core rails, RF transceiver biasing, and telematics GNSS front-end applications requiring stable component supply, AEC-Q100 traceability, and wettable flank manufacturability.
Supply support for AP7347DQ-18FDZW-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 for automotive, industrial, and computing markets, with ISO/TS 16949-certified facilities.
The AP7347DQ series targets automotive power management, specifically addressing noise-sensitive LDO requirements in ADAS, infotainment, and connectivity systems where AEC-Q100 compliance and thermal reliability are mandatory.
FAQ
What is the maximum allowable input voltage for AP7347DQ-18FDZW-7?
The absolute maximum input voltage is 6.0V, but the recommended operating range is 1.7V to 5.5V. Exceeding 5.5V risks permanent damage even for brief transients; automotive systems with load-dump spikes require external clamping or pre-regulation.
Does AP7347DQ-18FDZW-7 require an external discharge resistor?
No. The device integrates an auto-discharge N-channel FET (RDS(on) ≈ 30Ω) between VOUT and GND when EN is low, eliminating need for external components. This ensures VOUT decays rapidly (<1ms typical) to prevent back-powering or logic contention.
Can AP7347DQ-18FDZW-7 operate with ceramic output capacitors smaller than 1µF?
Stability is guaranteed only with ≥1µF ceramic output capacitance (X5R/X7R, 0603 or larger). Capacitors below 1µF may cause oscillation or poor transient response, especially under 500mA load steps - per Section 12.1 of DS42799 Rev. 5-2.
Is the W-DFN2020-6 (SWP) package lead-free and RoHS-compliant?
Yes. AP7347DQ-18FDZW-7 is fully RoHS 3 compliant (2015/863/EU), halogen- and antimony-free ("Green"), with matte tin-plated terminations meeting MIL-STD-202 Method 208 solderability requirements.
AP7347DQ-18FDZW-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- 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:
- Current Limit, Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- W-DFN2020-6 (SWP) (Type A1)
AP7347DQ-18FDZW-7 FAQ
1.How can I place an order for AP7347DQ-18FDZW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7347DQ-18FDZW-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-18FDZW-7 reliable?
The price and inventory of AP7347DQ-18FDZW-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-18FDZW-7 is usually 5 days.
3.What payment methods are accepted for AP7347DQ-18FDZW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7347DQ-18FDZW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7347DQ-18FDZW-7?
AP7347DQ-18FDZW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7347DQ-18FDZW-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-18FDZW-7?
For technical support, including AP7347DQ-18FDZW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7347DQ-18FDZW-7 requirements.
6.How does Aetrix verify that AP7347DQ-18FDZW-7 is sourced from the original manufacturer or authorized distributors?
All AP7347DQ-18FDZW-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-18FDZW-7 meets industry standards.
7.What is the process for return or replacement of AP7347DQ-18FDZW-7?
All AP7347DQ-18FDZW-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7347DQ-18FDZW-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-18FDZW-7 part is unused and in its original packaging.
Return procedure for AP7347DQ-18FDZW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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