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Diodes Incorporated AP7347DQ-28FDZW-7B
- Part No.:
- AP7347DQ-28FDZW-7B
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
AP7347DQ-28FDZW-7B.pdf
- Description:
- LDO CMOS LowCurr W-DFN2020-6 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
AP7347DQ-28FDZW-7B from Diodes Incorporated is an automotive-grade 2.8V 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 domains in ADAS cameras and infotainment systems.
For engineers reviewing the AP7347DQ-28FDZW-7B datasheet, AP7347DQ-28FDZW-7B pinout, AP7347DQ-28FDZW-7B application, or AP7347DQ-28FDZW-7B equivalent, key selection criteria include its AEC-Q100 qualification, WDFN2020-6 wettable flank package, 0.14–0.32V dropout at 500mA (for VOUT = 2.8V), 60µA quiescent current, and integrated EN-controlled shutdown with 0.01µA standby current.
Technical Context
The AP7347DQ-28FDZW-7B implements a CMOS-based LDO architecture with internal voltage reference, error amplifier, current-limit circuit, and thermal shutdown. Its fixed 2.8V output is set by an integrated resistor network, eliminating external feedback components.
It supports automotive ambient operation from −40°C to +125°C, includes active auto-discharge via a 30Ω N-channel switch when disabled, and delivers stable regulation with only 1µF input/output ceramic capacitors-enabling compact, high-density PCB layouts in space-constrained modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±1% - eliminates need for external resistive divider; ensures precise rail for 2.8V logic or analog sensors. |
| Max Output Current | 500mA - sufficient to power single-core microcontrollers, camera ISPs, or RF transceivers in automotive edge nodes. |
| PSRR | 75dB at 1kHz - suppresses switching noise from upstream DC/DC converters feeding infotainment or ADAS subsystems. |
| Output Noise | 60µVrms (10Hz–100kHz) - enables clean power for low-noise analog front-ends in automotive cameras and radar receivers. |
| Quiescent Current | 60µA typical - minimizes battery drain during vehicle sleep mode while maintaining fast wake-up capability. |
| Dropout Voltage | 0.27–0.32V at 500mA - allows operation down to VIN = 3.07V, supporting wide-input automotive battery ranges including cold-crank conditions. |
| Enable Threshold | VEN(H) ≥ 1.25V, VEN(L) ≤ 0.5V - compatible with 1.8V/3.3V GPIOs and robust against supply ripple or noise on control lines. |
| Thermal Shutdown | 170°C threshold with 20°C hysteresis - protects against sustained overload in sealed enclosures without requiring external thermal monitoring. |
Pinout & Package
AP7347DQ-28FDZW-7B is housed in a 2.0mm × 2.0mm WDFN2020-6 (SWP) wettable flank package with exposed thermal pad (EP). This ultra-compact, IATF 16949-manufactured package supports automated optical inspection (AOI) and improves thermal dissipation via PCB copper area connected to EP.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Regulated 2.8V output - connect directly to load with low-impedance path; place 1µF ceramic capacitor within 2mm. |
| 2 & 5 | NC | No-connect pins - recommended to tie to GND for enhanced thermal conduction and EMI shielding. |
| 3 | GND | Power ground reference - must be connected to solid ground plane; shortest possible trace to minimize noise coupling. |
| 4 | EN | Active-high enable - drive ≥1.25V to activate; pull ≤0.5V or float (not recommended) to disable with auto-discharge. |
| 6 | VIN | Input supply (1.7–5.5V) - requires local 1µF ceramic decoupling; wide trace recommended for transient current handling. |
| EP | Exposed Pad | Thermal interface - connect to large GND copper pour; not electrically functional as GND but critical for θJA = 54°C/W performance. |
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 for safety-critical ECUs. |
| Auto-discharge function | 30Ω internal N-channel switch discharges VOUT when EN = low - prevents floating outputs and ensures controlled power-down in camera or RF modules. |
| Low-noise, high-PSRR regulation | 60µVrms noise + 75dB PSRR at 1kHz - maintains signal integrity for image sensors and RF synthesizers sharing noisy power rails. |
| Ultra-low quiescent current | 60µA operating / 0.01µA standby - extends battery life in always-on ADAS vision systems during vehicle park mode. |
| Wettable flank WDFN2020-6 | 2.0×2.0mm footprint with side-wettable leads - enables reliable solder-joint inspection per IPC-A-610 and supports high-volume SMT assembly. |
Applications
| ADAS Camera Power | Infotainment SoC Core Rail |
|---|---|
|
Use Scenario: Powering image signal processors (ISPs) and CMOS image sensors in forward-facing ADAS cameras. IC Role / Device Role / Timing Role: Primary 2.8V analog/digital supply regulator with fast transient response and ultra-low noise. Use Value: Prevents image artifacts (e.g., banding, noise floor elevation) caused by power rail instability during rapid scene changes or LED flash synchronization. |
Use Scenario: Delivering clean 2.8V core voltage to application processors or audio DSPs in head-unit infotainment systems. IC Role / Device Role / Timing Role: Post-regulator for noise-sensitive digital cores downstream of buck converters. Use Value: Reduces bit-error rates in high-speed serial interfaces (e.g., MIPI CSI-2) and improves SNR in audio codecs. |
| Automotive RF Transceiver Supply | POL for Automotive Wireless Modules |
|
Use Scenario: Biasing 2.8V VCOs, LNAs, and mixers in UWB or Bluetooth LE wireless communication modules. IC Role / Device Role / Timing Role: Low-phase-noise local power source with high PSRR to suppress switching interference from nearby DC/DCs. Use Value: Maintains EVM <−35dB and adjacent channel leakage ratio (ACLR) compliance under dynamic load conditions. |
Use Scenario: Point-of-load regulation for 2.8V I/O or memory rails in telematics control units (TCUs) and V2X modules. IC Role / Device Role / Timing Role: Compact, AEC-Q100-compliant LDO placed near load to minimize IR drop and layout-induced noise. Use Value: Enables <100mV load regulation error across 0–500mA, ensuring reliable DDR I/O timing margins and SERDES link stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS74528PQWDRBRQ1 | 2.8V, 500mA, 65dB PSRR @ 1kHz, 12µVrms noise, 25µA IQ - lower noise but higher cost and larger 2.5×2.5mm DSBGA package. | Better suited for ultra-low-noise RF bias where 60µVrms is marginal; less optimal for space-constrained camera modules due to BGA assembly complexity. | Select if noise budget is <20µVrms and board real estate permits DSBGA; avoid if wettable flank AOI is required. |
| NCP114AMX28T2G | 2.8V, 300mA, ±2% accuracy, 60dB PSRR @ 1kHz, 120µVrms noise, 45µA IQ - lower current rating and higher noise; SOT-563 package. | Acceptable for low-power MCU peripherals but insufficient for ISP or RF loads demanding full 500mA with tight voltage tolerance. | Use only for non-safety-critical body electronics; not recommended for ADAS or infotainment due to current and accuracy limitations. |
Compared with TPS74528PQWDRBRQ1 and NCP114AMX28T2G, the AP7347DQ-28FDZW-7B uniquely balances AEC-Q100 compliance, wettable flank manufacturability, 500mA capability, and 60µVrms/75dB PSRR performance in a 2.0×2.0mm footprint-making it optimal for cost-sensitive, high-volume automotive vision and connectivity modules.
Availability
AP7347DQ-28FDZW-7B is available at Aetrix Electronics and suitable for automotive ADAS camera power, infotainment SoC core rails, and RF transceiver biasing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AP7347DQ-28FDZW-7B 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 devices, with design and manufacturing certified to IATF 16949 for automotive-grade products.
The AP7347DQ series belongs to Diodes' automotive LDO portfolio, engineered specifically for noise-sensitive, high-reliability power domains in ADAS, infotainment, and vehicle networking systems.
FAQ
What is the minimum input voltage required for AP7347DQ-28FDZW-7B to maintain regulation at 500mA?
The minimum input voltage is determined by dropout: for 2.8V output, max dropout is 0.32V at 500mA, so VIN must be ≥3.12V. At lower loads (e.g., 1mA), dropout drops to ~0.14V, allowing VIN as low as 2.94V. The device operates down to 1.7V input but cannot regulate 2.8V below the dropout threshold.
Does AP7347DQ-28FDZW-7B require an external discharge resistor?
No. The device integrates an N-channel auto-discharge switch (30Ω typical) between VOUT and GND that activates automatically when EN is pulled low. This eliminates the need for external components while ensuring rapid, controlled VOUT discharge-critical for safe power sequencing in camera modules.
Can AP7347DQ-28FDZW-7B be used with ceramic output capacitors smaller than 1µF?
Yes, but not recommended. While the device is stable with ≥0.47µF ceramic capacitors per Diodes' characterization, the datasheet specifies 1µF as the minimum for guaranteed transient response and stability across temperature and process variation. Using smaller values may degrade load-step recovery and increase output overshoot.
Is the exposed pad (EP) of AP7347DQ-28FDZW-7B electrically connected to GND?
No-the EP is not internally connected to any circuit node. It serves solely as a thermal interface. Diodes recommends connecting it to a large GND copper pour for optimal heat dissipation (θJA = 54°C/W), but it must not be used as the sole GND return path. The dedicated Pin 3 (GND) remains the primary electrical ground connection.
AP7347DQ-28FDZW-7B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Bulk
- 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:
- Current Limit, Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- W-DFN2020-6 (SWP) (Type A1)
AP7347DQ-28FDZW-7B FAQ
1.How can I place an order for AP7347DQ-28FDZW-7B through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7347DQ-28FDZW-7B 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-28FDZW-7B reliable?
The price and inventory of AP7347DQ-28FDZW-7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7347DQ-28FDZW-7B is usually 5 days.
3.What payment methods are accepted for AP7347DQ-28FDZW-7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7347DQ-28FDZW-7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7347DQ-28FDZW-7B?
AP7347DQ-28FDZW-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7347DQ-28FDZW-7B 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-28FDZW-7B?
For technical support, including AP7347DQ-28FDZW-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7347DQ-28FDZW-7B requirements.
6.How does Aetrix verify that AP7347DQ-28FDZW-7B is sourced from the original manufacturer or authorized distributors?
All AP7347DQ-28FDZW-7B 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-28FDZW-7B meets industry standards.
7.What is the process for return or replacement of AP7347DQ-28FDZW-7B?
All AP7347DQ-28FDZW-7B units undergo pre-shipment inspection (PSI). If there is an issue with AP7347DQ-28FDZW-7B, 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-28FDZW-7B part is unused and in its original packaging.
Return procedure for AP7347DQ-28FDZW-7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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