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Diodes Incorporated AP7347DQ-105W5-7
- Part No.:
- AP7347DQ-105W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7347DQ-105W5-7.pdf
- Description:
- LDO CMOS LOWCURR SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:8,560
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Product details
Overview
AP7347DQ-105W5-7 from Diodes Incorporated is an automotive-grade 500mA low-dropout linear regulator with fixed 1.05V output, ±1% accuracy, 75dB PSRR at 1kHz, 60µVrms output noise (10Hz–100kHz), and 60µA quiescent current. 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 domain controllers.
For engineers reviewing the AP7347DQ-105W5-7 datasheet, AP7347DQ-105W5-7 pinout, AP7347DQ-105W5-7 application, or AP7347DQ-105W5-7 equivalent, key selection criteria include its AEC-Q100 qualification, SOT25 (Type A1) package footprint, 1.7V–5.5V input range, 0.45V typical dropout at 500mA (for VOUT = 1.05V), and wettable flank compatibility for automated optical inspection.
Technical Context
The AP7347DQ-105W5-7 implements a CMOS-based LDO architecture with integrated voltage reference, error amplifier, current-limit circuit, and NMOS pass transistor with auto-discharge path. Its enable input supports active-high logic control with defined thresholds (VEN(H) ≥ 1.25V, VEN(L) ≤ 0.5V) and <1µA leakage.
Thermal protection activates at +170°C junction temperature with +20°C hysteresis; short-circuit foldback limits output current to ~180mA during VOUT-to-GND fault. The device achieves stable regulation with only 1µF ceramic CIN and COUT, leveraging low-ESR capacitor compatibility and optimized internal compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.05V ±1% - ensures precise core voltage for 1.0V–1.1V logic domains (e.g., automotive SoC I/O or sensor interface rails) |
| Max Output Current | 500mA - supports moderate-power digital loads such as image signal processors or RF transceivers without external boost stages |
| PSRR | 75dB at 1kHz - suppresses switching noise from upstream DC/DC converters in multi-rail automotive systems |
| Output Noise | 60µVrms (10Hz–100kHz) - minimizes jitter in clock-sensitive analog circuits like ADCs or PLLs |
| Quiescent Current | 60µA - enables always-on operation in low-power wake-up domains while meeting ISO 26262 ASIL-B standby requirements |
| Dropout Voltage | 0.45V typ. @ 500mA - allows operation from 1.5V input (e.g., bucked battery rail) while maintaining 1.05V output |
| Operating Temp | −40°C to +125°C ambient - validated for under-hood and cabin-mounted ECU environments per AEC-Q100 Grade 1 |
Pinout & Package
SOT25 (Type A1) package: 2.9mm × 2.8mm × 1.45mm body, 5-pin surface-mount outline with exposed pad not present; lead finish is matte tin, moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input power pin - requires low-impedance 1µF ceramic decoupling placed adjacent to pin; supports 1.7V–5.5V supply range |
| 2 | EN | Active-high enable - must be driven to ≥1.25V to activate regulator; floating state is undefined and prohibited |
| 3 | GND | Analog/digital ground reference - connects directly to PCB ground plane; critical for noise rejection and thermal dissipation |
| 4 | VOUT | Regulated output - delivers 1.05V ±1% with <45mV load regulation (1mA–500mA); requires local 1µF ceramic capacitor |
| 5 | NC | No-connect terminal - internally unconnected; recommended to tie to GND for improved thermal conduction and EMI shielding |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Qualification | AEC-Q100 Grade 1 qualified, PPAP-capable, manufactured in IATF 16949-certified facilities - meets functional safety development prerequisites for ASIL-B systems |
| Auto-Discharge Path | 30Ω on-resistance NMOS discharge switch activated during shutdown - clears VOUT within microseconds to prevent back-powering of downstream circuitry |
| Low-Noise Regulation | 60µVrms integrated noise floor - eliminates need for post-LDO filtering in high-resolution sensor signal chains |
| High PSRR Architecture | 75dB rejection at 1kHz, >50dB up to 100kHz - maintains clean supply under coupled noise from CAN/LIN transceivers or motor drivers |
| Thermal Robustness | +170°C shutdown threshold with +20°C hysteresis - prevents latch-up during transient overloads in compact ECU enclosures |
Applications
| ADAS Camera Power Rail | Infotainment SoC I/O Supply |
|---|---|
Use Scenario: Powers image signal processor (ISP) and MIPI CSI-2 serializer in forward-facing ADAS cameras operating in −40°C to +105°C ambient. IC Role / Device Role / Timing Role: Provides ultra-low-noise 1.05V bias for ISP core logic and high-speed serializer PHY, replacing bulkier discrete LDO+filter solutions. Use Value: 60µVrms noise prevents pixel-level artifacts; 500mA capacity supports burst-mode imaging without voltage droop. | Use Scenario: Supplies configurable I/O voltage domain for automotive infotainment SoCs requiring 1.05V for LPDDR4x interface termination. IC Role / Device Role / Timing Role: Delivers stable, fast-transient 1.05V rail synchronized with SoC enable sequencing via EN pin control. Use Value: 75dB PSRR isolates DDR I/O from noisy PMIC switching noise; ±1% accuracy ensures JEDEC-compliant VDDQ margin. |
| Automotive RF Transceiver Bias | Wireless V2X Module POL |
Use Scenario: Generates clean 1.05V supply for GNSS/GPS front-end LNAs and RF synthesizers in telematics control units. IC Role / Device Role / Timing Role: Acts as point-of-load regulator downstream of 3.3V buck converter, rejecting switching ripple before sensitive RF stages. Use Value: 0.45V dropout enables use with 1.5V intermediate rail; 60µA IQ extends battery backup runtime during ignition-off states. | Use Scenario: Powers DSRC or C-V2X baseband processors in roadside units where thermal density and EMI compliance are critical. IC Role / Device Role / Timing Role: Provides AEC-Q100-compliant 1.05V POL with enable-controlled power gating for duty-cycled communication bursts. Use Value: Auto-discharge (30Ω) prevents residual charge hold-up that could interfere with fast wake/sleep transitions mandated by ETSI EN 302 571. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS74701DQCR | 1.05V fixed, 500mA, 70dB PSRR @ 1kHz, 40µVrms noise, but only industrial temp (−40°C to +125°C) and no AEC-Q100 rating | Lacks automotive qualification and auto-discharge; requires external discharge resistor | Select only for non-automotive prototypes or cost-sensitive non-safety designs where AEC-Q100 is not required |
| NCP114AMX105TCG | 1.05V fixed, 300mA, ±2% accuracy, 65dB PSRR @ 1kHz, 75µVrms noise, AEC-Q100 Grade 2 (−40°C to +105°C) | Lower current capability and wider voltage tolerance; no integrated discharge FET | Acceptable for lower-power camera sensors or legacy ADAS modules with relaxed current and noise specs |
Compared with TPS74701DQCR and NCP114AMX105TCG, the AP7347DQ-105W5-7 uniquely combines AEC-Q100 Grade 1 qualification, 500mA output, 60µVrms noise, and integrated auto-discharge - making it the only option qualified for next-generation ASIL-B camera and V2X POL applications demanding full automotive reliability and fast power-state transitions.
Availability
AP7347DQ-105W5-7 is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment SoC I/O supplies, and wireless V2X communication systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AP7347DQ-105W5-7 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 automotive, industrial, and consumer markets.
The AP7347DQ belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for noise-critical point-of-load regulation in ADAS, infotainment, and vehicle-to-everything (V2X) systems where AEC-Q100 compliance and ultra-low noise are mandatory.
FAQ
What is the minimum input voltage required for AP7347DQ-105W5-7 to regulate 1.05V output at 500mA?
The AP7347DQ-105W5-7 requires a minimum input voltage of 1.5V to maintain regulation at 500mA load, based on its typical 0.45V dropout voltage at that condition. At 1.7V input, it guarantees full 500mA output across −40°C to +125°C ambient per datasheet Section 6.2 Recommended Operating Conditions.
Does AP7347DQ-105W5-7 require an external discharge resistor?
No. The AP7347DQ-105W5-7 integrates an NMOS auto-discharge switch (30Ω typical on-resistance) between VOUT and GND, activated automatically when EN is pulled low. This eliminates the need for external discharge components and ensures rapid VOUT decay (<100µs) during shutdown.
Can AP7347DQ-105W5-7 be used in a 2-layer PCB design without thermal vias?
Yes - the SOT25 (Type A1) package has θJA = 140°C/W on JEDEC-standard 3″×3″ multilayer board, but achieves acceptable thermal performance on 2-layer boards when using ≥200mm² copper pour connected to Pin 3 (GND) and routing wide traces (≥0.5mm) for VIN/VOUT. Derating to 350mA is recommended above +85°C ambient.
Is the NC pin on AP7347DQ-105W5-7 required to be grounded?
The NC pin (Pin 5) is not internally connected but should be tied to GND in PCB layout. Doing so improves thermal conduction from the die through the leadframe and enhances EMI shielding - both confirmed in Diodes' Application Information section (Page 12) and recommended in the Suggested Pad Layout (Page 16).
AP7347DQ-105W5-7 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):
- 1.05V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.95V @ 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-105W5-7 FAQ
1.How can I place an order for AP7347DQ-105W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7347DQ-105W5-7 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-105W5-7 reliable?
The price and inventory of AP7347DQ-105W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7347DQ-105W5-7 is usually 5 days.
3.What payment methods are accepted for AP7347DQ-105W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7347DQ-105W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7347DQ-105W5-7?
AP7347DQ-105W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7347DQ-105W5-7 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-105W5-7?
For technical support, including AP7347DQ-105W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7347DQ-105W5-7 requirements.
6.How does Aetrix verify that AP7347DQ-105W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7347DQ-105W5-7 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-105W5-7 meets industry standards.
7.What is the process for return or replacement of AP7347DQ-105W5-7?
All AP7347DQ-105W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7347DQ-105W5-7, 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-105W5-7 part is unused and in its original packaging.
Return procedure for AP7347DQ-105W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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