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Diodes Incorporated AP7347DQ-33FDZW-7
- Part No.:
- AP7347DQ-33FDZW-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
AP7347DQ-33FDZW-7.pdf
- Description:
- LDO CMOS LOWCURR W-DFN2020-6 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:2,450
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Product details
Overview
AP7347DQ-33FDZW-7 from Diodes Incorporated is an automotive-grade 3.3V 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-33FDZW-7 datasheet, AP7347DQ-33FDZW-7 pinout, AP7347DQ-33FDZW-7 application, or AP7347DQ-33FDZW-7 equivalent, key selection criteria include its AEC-Q100 qualification, WDFN2020-6 wettable flank package, 60µA quiescent current, 0.27–0.32V dropout at 500mA (for 3.3V output), and integrated EN-controlled shutdown with 0.01µA standby current.
Technical Context
The AP7347DQ-33FDZW-7 employs a CMOS-based LDO architecture with internal voltage reference, error amplifier, current limit circuit, and thermal shutdown. Its fixed 3.3V output is set by an integrated 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 internal N-channel MOSFET when disabled, ensuring rapid VOUT discharge to prevent system latch-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% - ensures precise rail generation without external resistors, critical for MCU I/O and sensor interfaces. |
| Max Output Current | 500mA - sufficient to power multiple automotive SoC cores or RF transceivers without derating at 125°C ambient. |
| PSRR | 75dB at 1kHz - suppresses switching noise from upstream DC/DC converters in multi-rail automotive systems. |
| Output Noise | 60µVrms (10Hz–100kHz) - enables clean analog supply for high-resolution ADCs and RF front-ends in cameras and radar receivers. |
| Quiescent Current | 60µA typical - minimizes battery drain during vehicle sleep mode, supporting ISO 16750-2 load-dump and low-power wake-on-LIN requirements. |
| Dropout Voltage | 0.27–0.32V at 500mA - allows operation from 3.6V input (e.g., post-buck 5V rail) while maintaining regulation under full load. |
| Enable Threshold | VEN(H) ≥1.25V, VEN(L) ≤0.5V - compatible with 1.8V/3.3V GPIOs and supports direct connection to microcontroller wake signals. |
| Thermal Shutdown | +170°C threshold with +20°C hysteresis - protects against sustained overload in enclosed ECU housings without requiring external thermal monitoring. |
Pinout & Package
AP7347DQ-33FDZW-7 is housed in a 2.0mm × 2.0mm W-DFN2020-6 (SWP) wettable flank package with exposed thermal pad (EP). This ultra-compact, AEC-Q100 qualified package enables high-density PCB layouts and superior thermal performance (θJA = 54°C/W) in space-constrained automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Regulated 3.3V output - connect directly to load with low-ESR ceramic capacitor (≥1µF) placed within 2mm for stability and transient response. |
| 2, 5 | NC | No-connect terminals - recommended to tie to GND for enhanced thermal conduction and EMI shielding in PCB layout. |
| 3 | GND | Power ground reference - must be connected to solid ground plane; shared with EP for optimal thermal path. |
| 4 | EN | Active-high enable - drives regulator ON when ≥1.25V; pulls VOUT to GND via 30Ω discharge FET when <0.5V. |
| 6 | VIN | Input supply (1.7–5.5V) - requires local 1µF ceramic decoupling capacitor placed adjacent to pin to suppress high-frequency noise. |
| EP | Exposed Pad | Thermal dissipation path - must be soldered to large copper area connected to GND plane; not electrically functional as GND node. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Qualification | AEC-Q100 Grade 1 (–40°C to +125°C), PPAP-capable, manufactured in IATF 16949-certified facilities - meets OEM Tier-1 supply chain traceability and change control requirements. |
| Low-Noise Regulation | 60µVrms output noise over 10Hz–100kHz - eliminates need for additional LC filtering in RF and imaging signal chains, reducing BOM count and board area. |
| Auto-Discharge Function | 30Ω internal N-channel FET discharges VOUT when EN = LOW - prevents floating outputs that could cause downstream logic glitches or latch-up in powered-down subsystems. |
| High PSRR & Wide VIN | 75dB PSRR at 1kHz and 1.7–5.5V input range - supports direct regulation from noisy 3.3V/5V bus rails without intermediate filtering, simplifying power tree design. |
| Wettable Flank Packaging | W-DFN2020-6 (SWP) with side-wettable leads - enables automated optical inspection (AOI) of solder joints for zero-defect automotive manufacturing. |
Applications
| Infotainment Power Supplies | ADAS Camera Modules |
|---|---|
|
Use Scenario: Powering display controllers, audio codecs, and touch interface ICs in head-unit systems operating under wide battery voltage swings and engine cranking conditions. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying noise-sensitive digital I/O and analog peripherals, with EN synchronized to system wake/sleep states. Use Value: ±1% output accuracy maintains I/O voltage margin across temperature; 60µA IQ extends battery hold-up time during ignition-off periods. |
Use Scenario: Providing clean 3.3V bias to CMOS image sensors and ISP processors in rear-view and surround-view camera ECUs. IC Role / Device Role / Timing Role: Low-noise post-regulator after buck converter, rejecting switching ripple to preserve SNR in high-dynamic-range imaging. Use Value: 60µVrms noise and 75dB PSRR eliminate visible banding artifacts; thermal shutdown prevents field failures in sealed camera housings. |
| Automotive RF Supplies | Wireless Communication Systems |
|
Use Scenario: Supplying 3.3V to GNSS receivers, LTE/V2X transceivers, and Bluetooth modules mounted near high-EMI zones like inverters or motors. IC Role / Device Role / Timing Role: Local LDO isolating RF ICs from noisy main power rails, with fast enable/disable for duty-cycled operation. Use Value: 0.32V dropout enables use with 3.6V intermediate rail; auto-discharge prevents RF IC latch-up during rapid power cycling. |
Use Scenario: Powering UWB anchors, BLE gateways, and Wi-Fi 6 modules in vehicle telematics and remote diagnostics units. IC Role / Device Role / Timing Role: Always-on LDO with EN controlled by host MCU to manage power states of wireless subsystems per connectivity demand. Use Value: 0.01µA standby current meets ISO 16750-2 Class D quiescent load limits; wettable flank package ensures AOI-verified solder reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73333PDBVR | 300mA output, 40µA IQ, no auto-discharge, SOT-23-5 package - lower current rating and missing discharge FET. | Not AEC-Q100 qualified; rated only for industrial temp (–40°C to +125°C) without PPAP support. | Select only for non-automotive cost-sensitive designs where 500mA and discharge are unnecessary. |
| NCP114AMX33T2G | 300mA output, 65µA IQ, 70dB PSRR at 1kHz, no auto-discharge, SOT-563 package - lacks discharge and automotive qualification. | Designed for consumer portables; no AEC-Q100, IATF 16949, or PPAP documentation available. | Use only in non-safety-critical, non-automotive applications where footprint and basic LDO function suffice. |
Compared with TLV73333PDBVR and NCP114AMX33T2G, the AP7347DQ-33FDZW-7 uniquely combines 500mA current, AEC-Q100 Grade 1 compliance, auto-discharge, and wettable flank packaging - making it the only drop-in solution for production automotive LDO requirements demanding reliability, noise immunity, and manufacturability.
Availability
AP7347DQ-33FDZW-7 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, RF transceiver power supplies, and wireless communication subsystems requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for AP7347DQ-33FDZW-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 computing markets.
The AP7347DQ series belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for noise-sensitive, safety-critical power rails in ADAS, infotainment, and vehicle connectivity systems.
FAQ
What is the maximum allowable input voltage for AP7347DQ-33FDZW-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 briefly, and operation above 5.5V voids AEC-Q100 qualification compliance. For 12V battery-derived rails, always precede with a buck converter or linear pre-regulator.
Does AP7347DQ-33FDZW-7 require an external discharge resistor?
No. The device integrates a 30Ω N-channel MOSFET between VOUT and GND that activates automatically when EN is pulled low, discharging the output capacitance without external components. This eliminates BOM cost and PCB area while ensuring reliable power-down sequencing in automotive systems.
Can AP7347DQ-33FDZW-7 be used without connecting the exposed pad (EP)?
No. The EP is thermally critical: θJA degrades from 54°C/W to >100°C/W if left unconnected, risking thermal shutdown under 500mA load at 85°C ambient. Diodes specifies mandatory soldering of EP to a GND-connected copper pour - not optional for automotive qualification or thermal reliability.
Is the 3.3V output voltage trimmed at final test for AP7347DQ-33FDZW-7?
Yes. Output voltage accuracy is guaranteed at ±1% over –40°C to +125°C junction temperature, verified by production test at multiple temperatures and load conditions. This trim occurs during wafer sort and final test - no external calibration is needed, and the tolerance holds across automotive lifetime stress profiles.
AP7347DQ-33FDZW-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):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.32V @ 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-33FDZW-7 FAQ
1.How can I place an order for AP7347DQ-33FDZW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7347DQ-33FDZW-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-33FDZW-7 reliable?
The price and inventory of AP7347DQ-33FDZW-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-33FDZW-7 is usually 5 days.
3.What payment methods are accepted for AP7347DQ-33FDZW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7347DQ-33FDZW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7347DQ-33FDZW-7?
AP7347DQ-33FDZW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7347DQ-33FDZW-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-33FDZW-7?
For technical support, including AP7347DQ-33FDZW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7347DQ-33FDZW-7 requirements.
6.How does Aetrix verify that AP7347DQ-33FDZW-7 is sourced from the original manufacturer or authorized distributors?
All AP7347DQ-33FDZW-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-33FDZW-7 meets industry standards.
7.What is the process for return or replacement of AP7347DQ-33FDZW-7?
All AP7347DQ-33FDZW-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7347DQ-33FDZW-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-33FDZW-7 part is unused and in its original packaging.
Return procedure for AP7347DQ-33FDZW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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