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Diodes Incorporated AP7343Q-18FDZW-7
- Part No.:
- AP7343Q-18FDZW-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
AP7343Q-18FDZW-7.pdf
- Description:
- LDO CMOS LOWCURR W-DFN2020-6 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:1,684
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Product details
Overview
AP7343Q-18FDZW-7 from Diodes Incorporated is an AEC-Q100 Grade 1 qualified automotive LDO regulator delivering 300mA output at fixed 1.8V with ±1% accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). It operates from 1.7V to 5.25V input, features enable control, thermal shutdown, and short-circuit protection, and is deployed in ADAS camera power rails and infotainment domain controllers.
For engineers reviewing the AP7343Q-18FDZW-7 datasheet, AP7343Q-18FDZW-7 pinout, AP7343Q-18FDZW-7 application, or AP7343Q-18FDZW-7 equivalent, key selection criteria include its 35µA quiescent current, low 0.35V dropout at 300mA (for VOUT = 1.8V), W-DFN2020-6 (SWP) Type A1 package thermal performance (θJA = 54°C/W), and automotive-grade change control compliance.
Technical Context
The AP7343Q-18FDZW-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and EN-controlled NMOS pass transistor-enabling fast load transient response (<100µs recovery for 1mA↔300mA steps) and stable operation with 1µF ceramic output capacitance. Its architecture omits auto-discharge functionality, distinguishing it from the AP7343DQ variant.
Designed for automotive power integrity, it delivers high PSRR across 100Hz–1MHz (≥60dB up to 100kHz), suppresses switching noise from adjacent DC/DC converters, and maintains regulation over –40°C to +125°C ambient while limiting junction temperature via thermal shutdown at +150°C with +20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% at +25°C; ensures stable core voltage for automotive MCUs and image sensors. |
| Max Output Current | 300mA guaranteed; supports dual-lane MIPI CSI-2 camera modules and low-power RF transceivers. |
| PSRR | 75dB at 1kHz; rejects ripple from buck converter switching frequencies in shared power domains. |
| Output Noise | 60µVrms (10Hz–100kHz); preserves signal integrity in analog front-ends of radar receivers. |
| Quiescent Current | 35µA typical; enables always-on functionality in vehicle wake-up circuits without battery drain. |
| Dropout Voltage | 0.35V max at 300mA (VOUT = 1.8V); sustains regulation during cold-crank conditions down to 2.15V input. |
| Operating Temp | –40°C to +125°C ambient; validated for under-hood and cockpit-mounted ADAS ECUs. |
Pinout & Package
AP7343Q-18FDZW-7 uses the W-DFN2020-6 (SWP) Type A1 package (2.0mm × 2.0mm, 0.65mm height), featuring wettable flanks for automated optical inspection and an exposed thermal pad (EP) that must be connected to PCB ground plane for optimal θJA = 54°C/W thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main power input; requires ≥0.47µF ceramic decoupling capacitor placed within 2mm of 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 connect directly to internal PCB ground plane with minimum 4-layer stackup. |
| 4 | VOUT | Regulated 1.8V output; routed with low-inductance trace to load, bypassed by 1µF ceramic capacitor at point-of-load. |
| 6 | EN | Enable control input; logic-high (>1.3V) activates regulator; floating state prohibited per design rules. |
| EP | Exposed Pad | Thermal dissipation path; requires ≥80% copper fill connected to GND plane-no solder mask opening permitted. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use with PPAP documentation support and IATF 16949 manufacturing. |
| Low-noise CMOS architecture | 60µVrms noise floor enables clean power for high-speed SerDes and ADC reference supplies. |
| Ultra-low quiescent current | 35µA enables >10-year battery standby life in telematics modules with periodic wake-up cycles. |
| High PSRR across wide frequency range | ≥60dB rejection up to 100kHz suppresses noise from 2MHz buck converters in multi-rail systems. |
| Robust thermal management | θJA = 54°C/W and +150°C thermal shutdown protect against sustained overload in sealed enclosures. |
Applications
| Infotainment Power Supplies | Automotive RF Supplies |
|---|---|
Use Scenario: Powering SoC I/O banks and audio codecs in head-unit designs. IC Role / Device Role / Timing Role: Primary 1.8V LDO for noise-sensitive digital interfaces requiring stable voltage under dynamic load. Use Value: 75dB PSRR prevents AM/FM receiver desensitization caused by digital switching noise. |
Use Scenario: Supplying 1.8V bias to LTE/V2X transceiver RF front-ends. IC Role / Device Role / Timing Role: Clean auxiliary rail isolating RF section from noisy main system power. Use Value: 60µVrms noise floor maintains EVM performance below –40dBc in 4G/5G modems. |
| Cameras | Automotive POL in ADAS |
Use Scenario: Providing 1.8V core voltage to CMOS image sensors in surround-view cameras. IC Role / Device Role / Timing Role: Point-of-load regulator placed adjacent to sensor die for minimal IR drop. Use Value: 300mA capability supports dual-sensor configurations with simultaneous exposure control. |
Use Scenario: Delivering 1.8V to vision processor cores in forward collision warning ECUs. IC Role / Device Role / Timing Role: Low-dropout supply maintaining regulation during engine cranking transients. Use Value: 0.35V dropout ensures uninterrupted operation when battery dips to 2.15V in cold-start conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7343Q-18W5-7 | SOT25 package (θJA = 179°C/W); larger footprint; no wettable flanks. | Preferred for prototyping or low-volume production where optical inspection is not required. | Select when thermal budget allows higher junction temperature rise and board space permits 2.9mm × 2.8mm footprint. |
| TLD1121-18ES | Infineon automotive LDO; 250mA rating; 65dB PSRR at 1kHz; integrated watchdog timer. | Used in safety-critical ASIL-B subsystems requiring fault reporting and reset generation. | Choose only if system-level functional safety requirements mandate built-in diagnostics and reset signaling. |
Compared with AP7343Q-18W5-7, the FDZW variant reduces thermal resistance by 70% and enables automated AOI; versus TLD1121-18ES, it trades diagnostic features for lower noise and higher current, making it optimal for non-safety ADAS imaging rails.
Availability
AP7343Q-18FDZW-7 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and wireless communication subsystems requiring stable component supply with full AEC-Q100 traceability and PPAP support.
Supply support for AP7343Q-18FDZW-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 and signal integrity solutions for automotive, industrial, and computing markets.
The AP7343Q belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for noise-sensitive power domains in ADAS, infotainment, and telematics systems operating across extended temperature ranges.
FAQ
What is the maximum allowable input voltage for AP7343Q-18FDZW-7?
The absolute maximum input voltage is 6.0V, but the recommended operating range is 1.7V to 5.25V. Exceeding 5.25V may trigger internal overvoltage protection or degrade long-term reliability, especially under high-temperature conditions. Operation above 5.25V is not characterized per datasheet specifications.
Does AP7343Q-18FDZW-7 include output discharge functionality?
No. The "Q" suffix denotes the non-discharge version; the "DQ" variant provides active output discharge via an internal NMOS switch. AP7343Q-18FDZW-7 holds output voltage after disable until external load discharges it, which is intentional for systems requiring controlled power-down sequencing.
Can AP7343Q-18FDZW-7 operate with a 1µF output capacitor?
Yes-this LDO is explicitly designed for stability with 1µF ceramic output capacitors, as confirmed in the datasheet's Application Information section. Using X5R/X7R dielectrics with ≤10mΩ ESR ensures phase margin >45° and eliminates need for bulk electrolytic capacitors in most automotive applications.
How is thermal performance affected if the exposed pad is left unconnected?
Leaving the EP pad unconnected increases θJA by ~35°C/W, raising junction temperature by up to 45°C at full 300mA load. This risks premature thermal shutdown or accelerated parametric drift. Diodes mandates EP connection to GND plane with ≥80% copper fill for production designs.
AP7343Q-18FDZW-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):
- 5.25V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 60 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (1kHz)
- Control Features:
- Current Limit, Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- W-DFN2020-6 (Type A1)
AP7343Q-18FDZW-7 FAQ
1.How can I place an order for AP7343Q-18FDZW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7343Q-18FDZW-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 AP7343Q-18FDZW-7 reliable?
The price and inventory of AP7343Q-18FDZW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7343Q-18FDZW-7 is usually 5 days.
3.What payment methods are accepted for AP7343Q-18FDZW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343Q-18FDZW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7343Q-18FDZW-7?
AP7343Q-18FDZW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7343Q-18FDZW-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 AP7343Q-18FDZW-7?
For technical support, including AP7343Q-18FDZW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343Q-18FDZW-7 requirements.
6.How does Aetrix verify that AP7343Q-18FDZW-7 is sourced from the original manufacturer or authorized distributors?
All AP7343Q-18FDZW-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 AP7343Q-18FDZW-7 meets industry standards.
7.What is the process for return or replacement of AP7343Q-18FDZW-7?
All AP7343Q-18FDZW-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343Q-18FDZW-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 AP7343Q-18FDZW-7 part is unused and in its original packaging.
Return procedure for AP7343Q-18FDZW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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