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Diodes Incorporated AP7343DQ-33FDZW-7
- Part No.:
- AP7343DQ-33FDZW-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
AP7343DQ-33FDZW-7.pdf
- Description:
- LDO CMOS LOWCURR W-DFN2020-6 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:2,940
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Product details
Overview
AP7343DQ-33FDZW-7 from Diodes Incorporated is an automotive-grade 300mA low-dropout linear regulator with fixed 3.3V output, ±1% accuracy, 75dB PSRR at 1kHz, 60µVrms output noise (10Hz–100kHz), and 35µA quiescent current. It features enable control, thermal shutdown, short-circuit protection, and AEC-Q100 Grade 1 qualification for use in ADAS camera power rails and infotainment domain controllers.
For engineers reviewing the AP7343DQ-33FDZW-7 datasheet, AP7343DQ-33FDZW-7 pinout, AP7343DQ-33FDZW-7 application, or AP7343DQ-33FDZW-7 equivalent, key selection criteria include its W-DFN2020-6 (SWP) Type A1 package, discharge function, -40°C to +125°C operation, and compliance with automotive PPAP and IATF 16949 manufacturing requirements.
Technical Context
The AP7343DQ-33FDZW-7 integrates a CMOS-based LDO architecture with internal voltage reference, error amplifier, current limit circuit, and active discharge path activated during shutdown. Its design targets noise-sensitive automotive subsystems requiring stable local regulation under fast load transients.
It delivers 300mA output with dropout as low as 0.22V at 3.0V < VOUT ≤ 3.6V, supports input voltages from 1.7V to 5.25V, and maintains ±1% output accuracy across temperature (-40°C to +125°C) and line/load conditions - critical for RF supply integrity in wireless communication modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% - ensures precise biasing for 3.3V logic, SerDes PHYs, and CAN FD transceivers. |
| Max Output Current | 300mA - sufficient for powering single-core microcontrollers, image sensors, or RF front-end ICs. |
| PSRR | 75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters in multi-rail automotive systems. |
| Output Noise | 60µVrms (10Hz–100kHz) - enables clean analog supply for ADCs, PLLs, and high-speed serial interfaces. |
| Quiescent Current | 35µA - minimizes standby power loss in always-on vehicle networks (e.g., body control modules). |
| Operating Temp | -40°C to +125°C - meets under-hood and cabin ambient requirements per AEC-Q100 Grade 1. |
| Enable Threshold | EN high ≥1.3V, low ≤0.5V - compatible with 1.8V/3.3V GPIOs without level-shifting. |
Pinout & Package
AP7343DQ-33FDZW-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 enhanced thermal performance (θJA = 54°C/W). The exposed pad (EP) must be connected to GND via large copper area for optimal thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main power input (1.7V–5.25V); requires local 0.47µF ceramic decoupling capacitor placed adjacent to pin. |
| 2 & 5 | NC | No-connect terminals; recommended to tie to GND for improved PCB thermal conduction and EMI shielding. |
| 3 | GND | Analog/digital ground reference; must connect directly to low-impedance ground plane beneath EP. |
| 4 | VOUT | Regulated 3.3V output; requires 1µF ceramic capacitor placed within 2mm of pin for stability and transient response. |
| 6 | EN | Active-high enable; drives regulator ON when ≥1.3V, places device in shutdown (<0.5V) with 0.01µA standby current. |
| EP | Exposed Pad | Thermal interface only - not electrically functional; must be soldered to GND copper pour for θJC = 17°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Discharge Path | 30Ω on-resistance between VOUT and GND during shutdown - discharges output capacitance rapidly to prevent latch-up in downstream logic. |
| Automotive Qualification | AEC-Q100 Grade 1 qualified, PPAP-capable, manufactured in IATF 16949-certified facilities - supports Tier 1 production traceability and change control. |
| Low-Noise Regulation | 60µVrms output noise with no external bypass capacitor required - eliminates need for secondary filtering in RF and sensor signal chains. |
| High PSRR at Low Frequencies | 75dB rejection at 1kHz - mitigates ripple from buck converter switching frequencies and their harmonics in multi-converter systems. |
| Wide Input Range | 1.7V to 5.25V operation - supports direct connection to 3.3V or 5V system rails, including post-buck intermediate buses. |
Applications
| Infotainment Power Supply | ADAS Camera Module |
|---|---|
|
Use Scenario: Local 3.3V rail generation for display timing controllers and audio codecs in head-unit systems. IC Role / Device Role / Timing Role: Primary LDO supplying noise-sensitive digital and mixed-signal blocks downstream of a 5V buck converter. Use Value: 75dB PSRR prevents switching artifacts from corrupting audio DAC output and display pixel clock jitter. |
Use Scenario: Powering high-resolution CMOS image sensors and ISP processors in forward-facing driver-assist cameras. IC Role / Device Role / Timing Role: Point-of-load regulator delivering stable 3.3V to sensor analog front-end and MIPI CSI-2 serializer. Use Value: 60µVrms noise floor preserves SNR in 12-bit+ image capture; ±1% accuracy ensures consistent exposure calibration. |
| Automotive Wireless Comms | RF Supply for GNSS/Telematics |
|
Use Scenario: Clean 3.3V supply for Bluetooth LE and Wi-Fi 6 transceivers in connected car gateways. IC Role / Device Role / Timing Role: Dedicated LDO isolating RF ICs from noisy digital domain supplies. Use Value: Fast load transient response (<100µs recovery) maintains VCO lock during packet bursts; discharge function prevents bus contention during sleep/wake cycles. |
Use Scenario: Biasing low-noise amplifiers and downconverters in dual-band GNSS receivers and LTE modems. IC Role / Device Role / Timing Role: Ultra-low-noise LDO replacing ferrite-bead + capacitor filters for RF signal chain integrity. Use Value: 60µVrms noise avoids reciprocal mixing degradation; -40°C to +125°C rating ensures cold-start GPS acquisition and hot-cabin modem reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7343Q-33FDZW-7 | No integrated discharge path; 0.01µA ISTANDBY vs. 35µA quiescent current in active mode. | Suitable where rapid VOUT discharge is unnecessary (e.g., non-sequenced power domains). | Select when lower active IQ is prioritized over controlled discharge behavior. |
| TLD1120FV | Higher 500mA output, wider 2.7–40V input range, but 120µVrms noise and no AEC-Q100 Grade 1 rating. | Better for high-current industrial loads; lacks automotive qualification and low-noise performance. | Choose only for non-automotive, higher-current applications where noise is less critical. |
Compared with AP7343Q-33FDZW-7, the DQ variant adds active discharge for deterministic power sequencing, while TLD1120FV trades noise performance and automotive compliance for broader input range and higher current - making AP7343DQ-33FDZW-7 the optimal choice for noise-critical, AEC-Q100-compliant 300mA POL applications.
Availability
AP7343DQ-33FDZW-7 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and wireless telematics systems requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for AP7343DQ-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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets.
The AP7343Q/DQ series belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for noise-sensitive point-of-load regulation in ADAS, infotainment, and connectivity systems operating across extended temperature ranges.
FAQ
What is the purpose of the NC pins on AP7343DQ-33FDZW-7?
Pins 2 and 5 are no-connect terminals with no internal bonding. Diodes Incorporated recommends connecting them to GND to maximize PCB copper area for thermal dissipation and improve electromagnetic compatibility - they serve no electrical function but enhance thermal and EMI performance when grounded.
Does AP7343DQ-33FDZW-7 require an external discharge FET?
No. Unlike standard LDOs, AP7343DQ-33FDZW-7 integrates an internal 30Ω NMOS discharge path between VOUT and GND that activates automatically when EN is pulled low. This eliminates the need for external components while ensuring rapid VOUT decay (<1ms for 1µF load) to prevent back-powering or bus contention.
How does the W-DFN2020-6 (SWP) Type A1 package differ from Type UXD?
Type A1 (FDZW) and Type UXD (FDUW) share identical footprint and thermal metrics (θJA ≈ 54°C/W), but differ in mold compound formulation and side-wall geometry to support distinct solder paste volume and reflow profiles. Type A1 is optimized for standard stencil thicknesses and is the default for automotive-released variants like AP7343DQ-33FDZW-7.
Can AP7343DQ-33FDZW-7 operate with input voltage below 2.0V?
Yes. The device supports VIN as low as 1.7V, enabling use with partially discharged 2-cell Li-ion batteries or low-voltage intermediate rails. At VIN = 1.7V and VOUT = 3.3V, it operates in dropout mode with reduced PSRR and increased dropout voltage - verify minimum headroom (≥0.22V) per load current using the Electrical Characteristics table.
AP7343DQ-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):
- 5.25V
- Voltage - Output (Min/Fixed):
- 3.3V
- 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)
AP7343DQ-33FDZW-7 FAQ
1.How can I place an order for AP7343DQ-33FDZW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7343DQ-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 AP7343DQ-33FDZW-7 reliable?
The price and inventory of AP7343DQ-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 AP7343DQ-33FDZW-7 is usually 5 days.
3.What payment methods are accepted for AP7343DQ-33FDZW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343DQ-33FDZW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7343DQ-33FDZW-7?
AP7343DQ-33FDZW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7343DQ-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 AP7343DQ-33FDZW-7?
For technical support, including AP7343DQ-33FDZW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343DQ-33FDZW-7 requirements.
6.How does Aetrix verify that AP7343DQ-33FDZW-7 is sourced from the original manufacturer or authorized distributors?
All AP7343DQ-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 AP7343DQ-33FDZW-7 meets industry standards.
7.What is the process for return or replacement of AP7343DQ-33FDZW-7?
All AP7343DQ-33FDZW-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343DQ-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 AP7343DQ-33FDZW-7 part is unused and in its original packaging.
Return procedure for AP7343DQ-33FDZW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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