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Diodes Incorporated AP7347DQ-50FDZW-7B
- Part No.:
- AP7347DQ-50FDZW-7B
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
AP7347DQ-50FDZW-7B.pdf
- Description:
- LDO CMOS LowCurr W-DFN2020-6 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
AP7347DQ-50FDZW-7B from Diodes Incorporated is an automotive-grade 500mA low-dropout linear regulator with fixed 5.0V 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 cameras and infotainment systems.
For engineers reviewing the AP7347DQ-50FDZW-7B datasheet, AP7347DQ-50FDZW-7B pinout, AP7347DQ-50FDZW-7B application, or AP7347DQ-50FDZW-7B equivalent, key selection criteria include AEC-Q100 qualification, WDFN2020-6 wettable flank package for solder joint inspection, 0.14–0.32V dropout at 500mA (for VOUT ≥ 4.0V), and guaranteed operation from –40°C to +125°C ambient.
Technical Context
The AP7347DQ-50FDZW-7B integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and thermal shutdown logic. Its internal architecture supports fast load transient response (<10µs settling) and stable regulation across 1.7V–5.5V input range with minimal external components-only 1µF input and output ceramic capacitors required.
Enable control is implemented via a dedicated EN pin with defined thresholds (VIL ≤ 0.5V, VIH ≥ 1.25V), and the device includes an integrated N-channel MOSFET for automatic output discharge when disabled. The exposed pad (EP) serves as a thermal path-not a functional ground terminal-and must be connected to PCB copper for junction-to-ambient thermal resistance of 54°C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±1% - eliminates need for external feedback resistors; ensures stable MCU core or RF IC supply under load variation. |
| Max Output Current | 500mA - supports single-rail powering of automotive camera modules or wireless transceivers without derating at +85°C. |
| PSRR | 75dB at 1kHz - suppresses switching noise from upstream DC/DC converters in infotainment head units. |
| Output Noise | 60µVrms (10Hz–100kHz) - enables clean analog sensor biasing and low-jitter clock generation in ADAS radar receivers. |
| Quiescent Current | 60µA - extends battery runtime in always-on vehicle subsystems such as telematics wake-up circuits. |
| Dropout Voltage | 0.14V (typ.) at 500mA - allows operation from degraded 5.2V battery rail during cold-crank conditions. |
| Operating Temp | –40°C to +125°C ambient - meets automotive cabin and engine bay thermal requirements per AEC-Q100 Grade 1. |
Pinout & Package
AP7347DQ-50FDZW-7B is housed in a 2.0mm × 2.0mm WDFN2020-6 (SWP) wettable flank package with exposed thermal pad (EP). This package supports automated optical inspection (AOI) of solder joints and achieves θJA = 54°C/W with proper PCB copper area under EP.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Regulated 5.0V output - connect directly to load with low-inductance 1µF ceramic capacitor placed adjacent to pin. |
| 2, 5 | NC | No-connect terminals - recommended to tie to GND for enhanced thermal conduction and EMI shielding. |
| 3 | GND | Power ground reference - must be routed to low-impedance ground plane; separate from digital ground if mixed-signal layout. |
| 4 | EN | Active-high enable - drives regulator ON when ≥1.25V; pulls output to 0V with auto-discharge when <0.5V. |
| 6 | VIN | Input supply (1.7–5.5V) - requires local 1µF decoupling capacitor; wide trace routing minimizes IR drop during load transients. |
| EP | Exposed Pad | Thermal dissipation path only - connect to large PCB copper area tied to GND for optimal θJC = 20°C/W; not electrically functional. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Grade 1 (–40°C to +125°C) - certified for automotive safety-critical subsystems including ADAS camera power domains. |
| Auto-Discharge Function | 30Ω on-resistance N-MOSFET - discharges VOUT within 100µs after EN deactivation, preventing back-powering of downstream logic. |
| Low-Noise Regulation | 60µVrms output noise - avoids interference with RF front-ends in automotive wireless communication modules (e.g., Bluetooth LE, UWB). |
| Wettable Flank Package | WDFN2020-6 (SWP) - enables reliable solder joint inspection via AOI or X-ray, critical for zero-defect automotive manufacturing. |
| High PSRR at Low Frequencies | 75dB @ 1kHz - rejects ripple from buck converter switching frequencies (e.g., 500kHz fundamental harmonics) in multi-rail POL designs. |
Applications
| ADAS Camera Power Supply | Infotainment SoC Core Rail |
|---|---|
|
Use Scenario: Powers image sensor and ISP in forward-facing ADAS camera module operating in engine compartment. IC Role / Device Role / Timing Role: Primary LDO delivering clean 5.0V to analog sensor bias and high-speed serial interface (e.g., MIPI CSI-2) PHY. Use Value: 60µVrms noise prevents pixel pattern noise; ±1% accuracy maintains sensor ADC reference stability across temperature. |
Use Scenario: Supplies 5.0V core voltage to application processor in automotive head unit with Android Automotive OS. IC Role / Device Role / Timing Role: Post-regulator for DC/DC converter output, filtering switching noise before entering SoC power domain. Use Value: 75dB PSRR suppresses 500kHz–2MHz switching artifacts; 500mA capacity handles burst-mode CPU loads without droop. |
| Automotive Wireless Transceiver | Telematics Module Always-On Rail |
|
Use Scenario: Provides regulated 5.0V to LTE/C-V2X transceiver IC in vehicle telematics control unit (TCU). IC Role / Device Role / Timing Role: Low-noise auxiliary supply for RF synthesizer and baseband analog sections. Use Value: Ultra-low 60µVrms noise prevents phase noise degradation in local oscillator paths; AEC-Q100 ensures field reliability. |
Use Scenario: Maintains 5.0V standby power to GNSS receiver and CAN controller during vehicle sleep mode. IC Role / Device Role / Timing Role: Always-on LDO with 60µA IQ, enabling rapid wake-up while minimizing battery drain. Use Value: 60µA quiescent current limits parasitic draw to <10µA system-level leakage; EN pin enables controlled power sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS74901DRVR | 500mA, 5.0V fixed, 65dB PSRR @ 1kHz, 40µVrms noise, no auto-discharge, SOT-23-6 package | Lacks AEC-Q100 qualification and wettable flanks; lower PSRR reduces noise rejection in high-frequency switching environments | Select only for non-automotive industrial use where AOI inspection is not required and discharge is handled externally. |
| NCP114AMX50T2G | 300mA, 5.0V fixed, ±2% accuracy, 60dB PSRR @ 1kHz, 120µVrms noise, AEC-Q100 Grade 2, DFN6 2×2 | Lower current rating and higher noise limit use in high-resolution imaging; wider accuracy tolerance affects sensor reference stability | Acceptable for cost-sensitive telematics modules where 300mA suffices and ±2% VOUT is acceptable for digital I/O rails. |
Compared with TPS74901DRVR and NCP114AMX50T2G, the AP7347DQ-50FDZW-7B uniquely combines AEC-Q100 Grade 1 qualification, wettable flank packaging for automotive process control, auto-discharge, and best-in-class 75dB PSRR-making it the only option qualified for safety-critical ADAS camera power delivery.
Availability
AP7347DQ-50FDZW-7B is available at Aetrix Electronics and suitable for automotive ADAS camera power supplies, infotainment SoC core rails, and telematics module always-on circuits requiring stable component supply across extended temperature ranges and zero-defect manufacturing compliance.
Supply support for AP7347DQ-50FDZW-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 solutions for automotive, industrial, and consumer markets, with ISO/TS 16949-certified wafer fabrication and assembly facilities.
The AP7347DQ series belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for noise-sensitive, high-reliability power domains in ADAS, infotainment, and vehicle connectivity systems.
FAQ
What is the minimum input voltage required for stable 5.0V output at 500mA?
The AP7347DQ-50FDZW-7B requires VIN ≥ 5.14V (5.0V + 0.14V typical dropout) to maintain regulation at full 500mA load. At worst-case 0.32V dropout (per datasheet), VIN must be ≥ 5.32V. Operation below 5.14V results in unregulated output and potential system reset.
Can the EN pin be left floating during operation?
No. The EN pin must never be left floating-it will cause unpredictable regulator behavior due to internal leakage paths. If enable functionality is unused, tie EN directly to VIN to ensure continuous operation; if using microcontroller control, drive EN with a push-pull output meeting VIH ≥ 1.25V and VIL ≤ 0.5V thresholds.
Is the exposed pad (EP) electrically connected to GND internally?
No. The EP is a thermal pad only, not bonded to any internal die node. It must be connected to PCB copper for heat dissipation but should not serve as the primary GND return path. GND current flows exclusively through Pin 3; EP connection is for thermal conduction only.
Does this part support reverse-voltage protection?
No. The AP7347DQ-50FDZW-7B has no built-in reverse-voltage protection. Applying negative voltage to VIN or VOUT can damage the device. External protection-such as a series Schottky diode on VIN or TVS on VOUT-is required in systems subject to battery reversal or load-dump transients.
AP7347DQ-50FDZW-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):
- 5V
- 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 (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- W-DFN2020-6 (SWP) (Type A1)
AP7347DQ-50FDZW-7B FAQ
1.How can I place an order for AP7347DQ-50FDZW-7B through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7347DQ-50FDZW-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-50FDZW-7B reliable?
The price and inventory of AP7347DQ-50FDZW-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-50FDZW-7B is usually 5 days.
3.What payment methods are accepted for AP7347DQ-50FDZW-7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7347DQ-50FDZW-7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7347DQ-50FDZW-7B?
AP7347DQ-50FDZW-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7347DQ-50FDZW-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-50FDZW-7B?
For technical support, including AP7347DQ-50FDZW-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7347DQ-50FDZW-7B requirements.
6.How does Aetrix verify that AP7347DQ-50FDZW-7B is sourced from the original manufacturer or authorized distributors?
All AP7347DQ-50FDZW-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-50FDZW-7B meets industry standards.
7.What is the process for return or replacement of AP7347DQ-50FDZW-7B?
All AP7347DQ-50FDZW-7B units undergo pre-shipment inspection (PSI). If there is an issue with AP7347DQ-50FDZW-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-50FDZW-7B part is unused and in its original packaging.
Return procedure for AP7347DQ-50FDZW-7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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