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Diodes Incorporated AP7347DQ-28W5-7
- Part No.:
- AP7347DQ-28W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7347DQ-28W5-7.pdf
- Description:
- LDO CMOS LOWCURR SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:2,948
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Product details
Overview
AP7347DQ-28W5-7 from Diodes Incorporated is an automotive-grade 2.8V fixed-output, 500mA low-dropout linear regulator with ±1% output 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-28W5-7 datasheet, AP7347DQ-28W5-7 pinout, AP7347DQ-28W5-7 application, or AP7347DQ-28W5-7 equivalent, key selection criteria include its AEC-Q100 qualification, 60µA quiescent current, 0.32V max dropout at 500mA (for VOUT = 2.8V), SOT25 package thermal resistance (θJA = 140°C/W), and wettable-flank WDFN2020-6 alternative option.
Technical Context
The AP7347DQ-28W5-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and thermal shutdown logic. Its enable input supports active-high logic control with defined thresholds (VEN(H) ≥ 1.25V, VEN(L) ≤ 0.5V) and <1µA leakage, enabling precise system-level power sequencing.
It delivers regulated 2.8V output from 1.7V–5.5V input, maintaining stability with 1µF ceramic input/output capacitors. The internal N-channel auto-discharge switch (RON ≈ 30Ω) actively pulls VOUT to GND during shutdown, preventing back-powering of downstream circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±1% over -40°C to +125°C - ensures stable core rail for automotive microcontrollers and sensors. |
| Max Output Current | 500mA - sufficient for powering single-core SoCs or multi-sensor camera modules without external boost stages. |
| PSRR | 75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters in compact automotive PCBs. |
| Output Noise | 60µVrms (10Hz–100kHz) - meets stringent RF supply requirements for automotive wireless transceivers and radar receivers. |
| Quiescent Current | 60µA typical - enables always-on functionality in vehicle entry systems while minimizing battery drain. |
| Dropout Voltage | 0.32V max at 500mA - allows operation down to 3.12V input, supporting wide VIN range in start-stop engine environments. |
| Enable Thresholds | VEN(H) ≥ 1.25V, VEN(L) ≤ 0.5V - compatible with 1.8V/3.3V GPIOs for direct MCU control without level-shifting. |
| AEC-Q100 Grade | Grade 1 (−40°C to +125°C ambient) - qualified for under-hood and cabin-mounted ADAS applications. |
Pinout & Package
SOT25 (Type A1) package: 2.9mm × 2.8mm × 1.45mm body, lead-free matte tin terminations, moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main power input; requires local 1µF ceramic decoupling to suppress high-frequency ripple and maintain stability. |
| 2 | EN | Active-high enable; must be driven to defined logic levels-floating causes undefined output state and potential shoot-through risk. |
| 3 | GND | Analog/digital ground reference; connects directly to PCB ground plane to minimize impedance and EMI coupling. |
| 4 | VOUT | Regulated 2.8V output; routed with wide trace and placed adjacent to load to reduce IR drop and transient undershoot. |
| 5 | NC | No-connect terminal; recommended to tie to GND for enhanced thermal dissipation via PCB copper area. |
| 6 | NC | No-connect terminal; same thermal recommendation as Pin 5-critical for thermal performance in SOT25 layout. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-Discharge Circuit | Integrated 30Ω N-channel switch discharges VOUT during shutdown-eliminates need for external bleed resistor in safety-critical systems. |
| Low-Noise Architecture | 60µVrms noise floor enables direct powering of RF front-ends without additional filtering, reducing BOM count and board space. |
| High PSRR at Low Frequencies | 75dB rejection at 1kHz mitigates ripple from buck converter switching edges (e.g., 500kHz–2MHz fundamental harmonics). |
| Thermal Shutdown with Hysteresis | Triggers at +170°C with +20°C hysteresis-prevents thermal cycling damage during sustained overload or poor heatsinking. |
| AEC-Q100 Qualified & PPAP Capable | Manufactured in IATF 16949-certified facilities with full change control-meets OEM requirements for automotive production traceability. |
Applications
| Infotainment Power Supplies | Automotive RF Supplies |
|---|---|
|
Use Scenario: Powering audio DSPs and display controllers in head-unit systems with shared 5V rail from main DC/DC converter. IC Role / Device Role / Timing Role: Primary LDO delivering clean 2.8V for analog audio paths and HDMI PHY termination. Use Value: 75dB PSRR prevents audible switching artifacts; ±1% accuracy maintains consistent DAC reference across temperature. |
Use Scenario: Supplying 2.8V to LTE/V2X transceiver ICs operating near high-noise power domains. IC Role / Device Role / Timing Role: Low-noise post-regulator isolating RF ICs from noisy 3.3V system rail. Use Value: 60µVrms noise ensures EVM compliance; auto-discharge prevents RF IC latch-up during sleep/wake transitions. |
| Cameras | Automotive POL in ADAS |
|
Use Scenario: Providing stable 2.8V to image sensor analog front-end (AFE) and ISP cores in surround-view cameras. IC Role / Device Role / Timing Role: Precision voltage source for sensor biasing and ADC reference, synchronized with frame timing. Use Value: 0.32V dropout enables operation during cold-crank (≥6.0V battery sag); thermal shutdown protects against lens heater proximity. |
Use Scenario: Local point-of-load regulation for vision processor SoCs in forward collision warning modules. IC Role / Device Role / Timing Role: Secondary LDO supplying 2.8V core rail after primary 1.2V/1.8V buck conversion. Use Value: 60µA IQ extends battery backup runtime during ignition-off monitoring; AEC-Q100 Grade 1 ensures reliability at +105°C junction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS74901DRVR | Higher IQ (120µA), lower PSRR (65dB @ 1kHz), no auto-discharge, non-automotive grade. | Lacks AEC-Q100 qualification and thermal hysteresis-unsuitable for production automotive use. | Select only for non-automotive prototyping where cost outweighs qualification requirements. |
| NCP1117ST28T3G | Lower output current (800mA), higher dropout (1.1V @ 800mA), ±2% accuracy, no enable or auto-discharge. | Requires larger input margin; lacks enable control for power sequencing-limits use in modern ADAS domain controllers. | Consider only for legacy designs with relaxed noise/accuracy needs and no functional safety constraints. |
Compared with TPS74901DRVR and NCP1117ST28T3G, the AP7347DQ-28W5-7 uniquely combines AEC-Q100 Grade 1, auto-discharge, 60µA IQ, and 75dB PSRR-making it the only qualified solution for next-gen automotive camera and RF POL applications requiring both low noise and functional safety support.
Availability
AP7347DQ-28W5-7 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and vehicle-to-everything (V2X) communication subsystems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AP7347DQ-28W5-7 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 solutions for automotive, industrial, computing, and consumer markets.
The AP7347DQ belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for noise-sensitive, safety-critical power rails in ADAS, infotainment, and telematics systems.
FAQ
What is the maximum allowable input voltage for AP7347DQ-28W5-7?
The absolute maximum input voltage is 6.0V. Operation above this risks permanent damage due to gate oxide breakdown in the internal CMOS pass device. Recommended operating range is 1.7V–5.5V, ensuring optimal PSRR and dropout performance across automotive battery conditions including cold-crank (6.0V transient) and load-dump (40V spike, handled externally).
Does AP7347DQ-28W5-7 require an external discharge resistor?
No. The device integrates an N-channel auto-discharge switch (RON ≈ 30Ω) that actively pulls VOUT to GND when EN is low. This eliminates the need for external resistors, reduces BOM count, and ensures predictable discharge timing-critical for functional safety compliance in ISO 26262 ASIL-B systems.
Can AP7347DQ-28W5-7 be used with ceramic output capacitors smaller than 1µF?
Yes, but only within specified stability boundaries. The datasheet confirms stability with ≥1µF ceramic COUT; using smaller values may cause oscillation or degraded transient response. For applications demanding ultra-low capacitance (e.g., space-constrained camera modules), verify phase margin via bench testing with actual PCB parasitics and load profiles.
Is the SOT25 package of AP7347DQ-28W5-7 compatible with automated optical inspection (AOI)?
Yes. The SOT25 (Type A1) package uses standard matte tin-plated leads with defined coplanarity (≤0.15mm) and wettable flanks are not required-enabling reliable AOI detection of solder joint integrity. However, for enhanced thermal performance in high-power automotive applications, the WDFN2020-6 variant (AP7347DQ-28FDZW-7) offers superior θJA (54°C/W vs. 140°C/W) and wettable flank inspection capability.
AP7347DQ-28W5-7 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):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.36V @ 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-28W5-7 FAQ
1.How can I place an order for AP7347DQ-28W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7347DQ-28W5-7 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-28W5-7 reliable?
The price and inventory of AP7347DQ-28W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7347DQ-28W5-7 is usually 5 days.
3.What payment methods are accepted for AP7347DQ-28W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7347DQ-28W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7347DQ-28W5-7?
AP7347DQ-28W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7347DQ-28W5-7 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-28W5-7?
For technical support, including AP7347DQ-28W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7347DQ-28W5-7 requirements.
6.How does Aetrix verify that AP7347DQ-28W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7347DQ-28W5-7 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-28W5-7 meets industry standards.
7.What is the process for return or replacement of AP7347DQ-28W5-7?
All AP7347DQ-28W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7347DQ-28W5-7, 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-28W5-7 part is unused and in its original packaging.
Return procedure for AP7347DQ-28W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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