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Diodes Incorporated AP7343Q-29FDZW-7
- Part No.:
- AP7343Q-29FDZW-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
AP7343Q-29FDZW-7.pdf
- Description:
- LDO CMOS LOWCURR W-DFN2020-6 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
AP7343Q-29FDZW-7 from Diodes Incorporated is an automotive-grade 300mA low-dropout linear regulator with fixed 2.9V output, ±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 qualified for ADAS camera and infotainment power rails.
For engineers reviewing the AP7343Q-29FDZW-7 datasheet, AP7343Q-29FDZW-7 pinout, AP7343Q-29FDZW-7 application, or AP7343Q-29FDZW-7 equivalent, key selection criteria include AEC-Q100 Grade 1 qualification, W-DFN2020-6 (SWP) Type A1 package thermal performance (θJA = 54°C/W), dropout voltage ≤0.22V at 300mA (for VOUT > 3.0V), and EN pin logic thresholds (VIL ≤ 0.5V, VIH ≥ 1.3V).
Technical Context
The AP7343Q-29FDZW-7 uses a CMOS-based LDO architecture with integrated voltage reference, error amplifier, current limit, and thermal shutdown circuitry. Its fixed 2.9V output is set by an internal resistor network, eliminating external feedback components.
It delivers stable regulation under fast load transients (e.g., 1mA ↔ 300mA step) with <±15mV load regulation and supports ultra-low quiescent current (35µA typ.) for always-on automotive subsystems. The device lacks built-in output discharge (non-D variant), requiring external circuitry if rapid VOUT decay is needed.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.9V ±1% at +25°C; ensures precise rail generation for 2.9V-specified sensors or RF ICs. |
| Max Output Current | 300mA guaranteed; supports moderate-power automotive loads like camera ISPs or CAN transceivers. |
| PSRR | 75dB at 1kHz; suppresses switching noise from upstream DC/DC converters in noisy automotive environments. |
| Output Noise | 60µVrms (10Hz–100kHz); critical for noise-sensitive analog circuits such as RF front-ends and image sensors. |
| Quiescent Current | 35µA typical; enables low standby power in battery-backed modules without compromising wake-up responsiveness. |
| Dropout Voltage | ≤0.22V at 300mA (VOUT > 3.0V); allows operation down to VIN = 3.12V, extending battery runtime in 12V systems with wide input variation. |
| Operating Temp | -40°C to +125°C junction; validated for under-hood and cabin-mounted ADAS ECUs per AEC-Q100 Grade 1. |
Pinout & Package
AP7343Q-29FDZW-7 is packaged in W-DFN2020-6 (SWP) Type A1 - a 2.0mm × 2.0mm, 0.65mm pitch, wettable flank package with exposed thermal pad (EP). This footprint enables high-density PCB layout and superior thermal dissipation (θJA = 54°C/W) versus SOT25.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power Input | Accepts 1.7V–5.25V supply; requires local 0.47µF ceramic decoupling capacitor placed adjacent to minimize input impedance. |
| EN (Pin 2) | Enable Control | Active-high logic input; must be driven to ≥1.3V to enable regulation, ≤0.5V to enter shutdown (IQ = 0.01µA). |
| GND (Pin 3) | Ground Reference | Primary return path for input/output current; connects to PCB ground plane to reduce noise coupling and improve stability. |
| VOUT (Pin 4) | Regulated Output | Delivers fixed 2.9V ±1%; requires 1µF ceramic output capacitor placed near load to ensure transient response and stability. |
| NC (Pin 5) | No Connect | Internally unconnected; recommended to tie to GND for enhanced thermal conduction via PCB copper area. |
| NC (Pin 6) | No Connect | Internally unconnected; same thermal recommendation as Pin 5. |
| EP | Exposed Thermal Pad | Not electrically functional; must be soldered to large GND copper pour to achieve rated θJA and prevent thermal shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 Qualified | Validated for automotive use from -40°C to +125°C ambient, supporting PPAP documentation and IATF 16949 manufacturing. |
| High PSRR & Low Noise | 75dB rejection at 1kHz and 60µVrms noise enable clean power for RF receivers and high-resolution ADCs in ADAS cameras. |
| Ultra-Low Quiescent Current | 35µA typical operating current allows integration into always-on domains (e.g., vehicle wake-up controllers) without excessive battery drain. |
| Thermal & Short-Circuit Protection | Auto-shutdown at +150°C junction temperature and foldback current limiting (~55mA short-circuit current) prevent damage during fault conditions. |
| Wide Input Range | 1.7V–5.25V operation supports direct connection to 3.3V or 5V rails and accommodates cold-crank dips in 12V systems. |
Applications
| Infotainment Power Supplies | Automotive RF Supplies |
|---|---|
Use Scenario: Powering audio DSPs, display controllers, and touch interface ICs in head units and digital clusters. IC Role / Device Role / Timing Role: Primary 2.9V LDO delivering stable, low-noise bias for mixed-signal SoCs and high-speed serial interfaces (e.g., LVDS, MIPI). Use Value: ±1% output accuracy maintains timing margin for clock buffers; 75dB PSRR prevents audible switching artifacts in audio amplifiers. |
Use Scenario: Supplying RF transceivers (e.g., Bluetooth LE, UWB) and GNSS front-ends in telematics control units. IC Role / Device Role / Timing Role: Clean 2.9V rail for RF synthesizers and low-noise amplifiers where supply ripple directly impacts phase noise and receiver sensitivity. Use Value: 60µVrms noise ensures EVM compliance; thermal shutdown protects against antenna mismatch-induced overheating. |
| Cameras | Automotive POL in ADAS |
Use Scenario: Biasing CMOS image sensors, ISP processors, and lens actuators in surround-view and driver-monitoring cameras. IC Role / Device Role / Timing Role: Point-of-load regulator converting 5V or 3.3V system rail to precise 2.9V for sensor analog core and pixel array. Use Value: Load regulation ≤30mV ensures consistent exposure control across illumination changes; -40°C to +125°C rating matches camera housing thermal profile. |
Use Scenario: Local regulation for radar MMICs, laser diode drivers, and AI accelerator cores in forward collision warning and automated parking ECUs. IC Role / Device Role / Timing Role: Secondary LDO providing isolated, low-noise 2.9V supply downstream of primary buck converter to reduce cross-talk between digital and analog domains. Use Value: Fast line/load transient response (<100µs settling) maintains voltage integrity during radar chirp bursts; W-DFN2020-6 package enables compact placement near high-speed ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7343Q-29W5-7 | SOT25 package (θJA = 179°C/W); larger footprint; no wettable flanks. | Lower power density; suitable for non-thermally constrained boards or prototyping. | Select when board space permits and thermal budget allows higher junction temperature rise. |
| TLD1120FV | Infineon automotive LDO; 2.9V output, 350mA, but higher IQ (60µA typ.) and lower PSRR (65dB @ 1kHz). | Less effective noise suppression in RF-heavy designs; wider dropout (0.3V @ 300mA). | Choose only if dual-sourcing is required and PSRR/noise specs are relaxed for the target application. |
Compared with AP7343Q-29W5-7, the FDZW variant offers 3.3× lower thermal resistance for identical power dissipation, while TLD1120FV trades off noise performance and efficiency to meet Infineon's functional safety architecture-making AP7343Q-29FDZW-7 optimal for thermally dense, noise-critical ADAS nodes.
Availability
AP7343Q-29FDZW-7 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, RF communication subsystems, and battery-powered telematics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AP7343Q-29FDZW-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 devices for automotive, industrial, and consumer markets, with ISO/TS 16949-certified wafer fabrication and assembly facilities.
The AP7343Q series belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for noise-sensitive point-of-load regulation in ADAS, infotainment, and body electronics where AEC-Q100 compliance and thermal robustness are mandatory.
FAQ
What is the maximum allowable input voltage for AP7343Q-29FDZW-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 overvoltage protection or degrade long-term reliability, especially at high ambient temperatures. Operation above 5.25V is not characterized or guaranteed per the datasheet.
Does AP7343Q-29FDZW-7 include output discharge functionality?
No. The "Q" suffix (vs. "DQ") indicates the non-discharge variant. When disabled via the EN pin, the output remains floating and does not actively pull VOUT to GND. If rapid discharge is required, an external NMOS switch or bleed resistor must be added between VOUT and GND.
Can AP7343Q-29FDZW-7 be used with ceramic output capacitors smaller than 1µF?
Yes, the device is stable with ceramic capacitors as low as 0.47µF, but 1µF is recommended for optimal transient response and PSRR performance across temperature. Using <1µF may increase output voltage deviation during fast load steps (e.g., >100mA/µs) and reduce noise filtering effectiveness at high frequencies.
How is thermal performance affected if the exposed pad (EP) is not connected to GND?
Leaving the EP unconnected or floating increases θJA by ~20–30°C/W, significantly raising junction temperature under load. For 300mA output at 125°C ambient, this can cause premature thermal shutdown. Diodes recommends soldering EP to a minimum 4mm² GND copper area with ≥4 thermal vias to maintain rated thermal resistance.
AP7343Q-29FDZW-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):
- 2.9V
- 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-29FDZW-7 FAQ
1.How can I place an order for AP7343Q-29FDZW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7343Q-29FDZW-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-29FDZW-7 reliable?
The price and inventory of AP7343Q-29FDZW-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-29FDZW-7 is usually 5 days.
3.What payment methods are accepted for AP7343Q-29FDZW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343Q-29FDZW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7343Q-29FDZW-7?
AP7343Q-29FDZW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7343Q-29FDZW-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-29FDZW-7?
For technical support, including AP7343Q-29FDZW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343Q-29FDZW-7 requirements.
6.How does Aetrix verify that AP7343Q-29FDZW-7 is sourced from the original manufacturer or authorized distributors?
All AP7343Q-29FDZW-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-29FDZW-7 meets industry standards.
7.What is the process for return or replacement of AP7343Q-29FDZW-7?
All AP7343Q-29FDZW-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343Q-29FDZW-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-29FDZW-7 part is unused and in its original packaging.
Return procedure for AP7343Q-29FDZW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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