My Inquiry
My Account
Diodes Incorporated AP7343Q-33FDZW-7
- Part No.:
- AP7343Q-33FDZW-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
AP7343Q-33FDZW-7.pdf
- Description:
- LDO CMOS LOWCURR W-DFN2020-6 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP7343Q-33FDZW-7 from Diodes Incorporated is an AEC-Q100 Grade 1 automotive-compliant 300mA low-dropout regulator with fixed 3.3V output, ±1% accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). It operates from 1.7V to 5.25V input, delivers stable power for noise-sensitive RF and ADAS subsystems, and features enable control, thermal shutdown, and short-circuit protection.
For engineers reviewing the AP7343Q-33FDZW-7 datasheet, AP7343Q-33FDZW-7 pinout, AP7343Q-33FDZW-7 application, or AP7343Q-33FDZW-7 equivalent, key selection criteria include its 3.3V fixed output, W-DFN2020-6 (SWP) Type A1 package, automotive qualification, low quiescent current (35µA), and high PSRR performance in infotainment and camera power domains.
Technical Context
The AP7343Q-33FDZW-7 integrates a CMOS-based LDO architecture with precision voltage reference, error amplifier, current limit circuit, and active enable logic. Its internal resistor network fixes VOUT at 3.3V, eliminating external feedback components.
It delivers 300mA guaranteed output current with dropout voltage as low as 0.22V at 3.0V < VOUT ≤ 3.6V (IOUT = 300mA), supports –40°C to +125°C ambient operation, and includes thermal shutdown (150°C) with 20°C hysteresis and foldback short-circuit protection (~55mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% - eliminates need for external resistive divider and ensures precise rail for MCU I/O or RF IC biasing. |
| Max Output Current | 300mA - sufficient for powering single-domain automotive sensors, camera modules, or low-power wireless transceivers. |
| 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 RF front-ends and high-resolution ADCs without added filtering. |
| Quiescent Current | 35µA typical - minimizes standby power loss in always-on vehicle networks like CAN wake-up circuits. |
| Input Voltage Range | 1.7V to 5.25V - compatible with 3.3V and 5V intermediate rails, including post-regulated battery-supplied domains. |
| Operating Temp | –40°C to +125°C - meets under-hood and cabin temperature requirements per AEC-Q100 Grade 1. |
Pinout & Package
AP7343Q-33FDZW-7 uses the W-DFN2020-6 (SWP) Type A1 package (2.0mm × 2.0mm, 0.65mm height), featuring wettable flanks and an exposed thermal pad (EP) for enhanced PCB heat dissipation. Pin 4 is NC (recommended tied to GND); EP must be connected to large copper area tied to GND for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Power Input | Accepts 1.7V–5.25V input; requires local 0.47µF ceramic decoupling capacitor placed adjacent to pin. |
| 2 (EN) | Enable Control | Active-high logic input (VIL ≤ 0.5V, VIH ≥ 1.3V); floating state prohibited-must be pulled to VIN or GND. |
| 3 (GND) | Ground Reference | Primary return path for input/output current; must connect directly to low-impedance ground plane. |
| 4 (NC) | No Connect | Internally unconnected; recommended to tie to GND for improved thermal conduction and EMI shielding. |
| 5 (VOUT) | Regulated Output | Delivers stable 3.3V ±1%; requires 1µF ceramic output capacitor placed within 2mm of pin for stability. |
| 6 (EP) | Exposed Thermal Pad | Not electrically functional; must be soldered to ≥40mm² GND copper pour to achieve θJA = 54°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 Qualified | Validated for automotive use across –40°C to +125°C ambient, PPAP-capable, manufactured in IATF 16949 facilities. |
| High PSRR & Low Noise | 75dB rejection at 1kHz and 60µVrms broadband noise enable direct powering of RF ICs and high-speed SerDes without additional LDO staging. |
| Ultra-Low Quiescent Current | 35µA typical IQ allows integration into always-on domains (e.g., body control modules) without compromising battery drain budgets. |
| Thermal & Short-Circuit Protection | Integrated thermal shutdown (150°C, 20°C hysteresis) and foldback current limiting (~55mA) prevent damage during fault conditions. |
| Small Footprint Packaging | W-DFN2020-6 (SWP) Type A1 offers 4mm² board area-ideal for space-constrained ADAS camera modules and infotainment SoC power islands. |
Applications
| Infotainment Power Supplies | Automotive RF Supplies |
|---|---|
|
Use Scenario: Powering audio DSPs, display controllers, and USB-C PD interface ICs in head-unit systems. IC Role / Device Role: Primary 3.3V post-regulator delivering clean, low-noise supply after buck converter stage. Use Value: 60µVrms noise and 75dB PSRR prevent audible artifacts and digital bit errors in high-fidelity audio paths. |
Use Scenario: Biasing VCOs, LNAs, and mixer stages in cellular/V2X modems and GNSS receivers. IC Role / Device Role: Dedicated low-noise LDO supplying critical RF signal chain blocks. Use Value: Fixed 3.3V ±1% output ensures consistent gain and phase response across temperature and load variations. |
| Cameras | Automotive POL in ADAS |
|
Use Scenario: Providing regulated 3.3V to image sensor interfaces (MIPI CSI-2), ISP power domains, and lens actuator drivers. IC Role / Device Role: Point-of-load regulator located adjacent to sensor module PCB. Use Value: W-DFN2020-6 footprint enables placement within tight camera housing constraints while maintaining thermal reliability. |
Use Scenario: Supplying vision processor I/O banks and radar MMIC bias rails in forward-facing ADAS ECUs. IC Role / Device Role: Secondary LDO ensuring stable 3.3V for high-speed digital interfaces subject to EMI from nearby motor drivers. Use Value: 300mA capability and –40°C to +125°C operation support continuous runtime in engine bay-mounted ADAS units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7361Q-33DWA-7 | Higher output current (600mA), same 3.3V ±1% accuracy, but larger W-DFN3030-10 package (3.0mm × 3.0mm). | Better suited for multi-rail ADAS processors requiring higher sustained current; less suitable for ultra-compact camera modules. | Select when >300mA peak load or dual-output sequencing is required; avoid if board space is constrained to <4mm². |
| TLD1313EL | 300mA automotive LDO with integrated watchdog timer and diagnostic flag; 3.3V ±2% accuracy; SO-8 package. | Targets safety-critical domains requiring ASIL-B compliance; adds system-level monitoring not present in AP7343Q. | Choose only when functional safety diagnostics (e.g., reset assertion on overtemperature) are mandated by system architecture. |
Compared with AP7343Q-33FDZW-7, AP7361Q-33DWA-7 trades compact size for higher current headroom, while TLD1313EL adds safety features at the cost of accuracy and footprint-making AP7343Q optimal for space- and noise-constrained non-safety ADAS and infotainment nodes.
Availability
AP7343Q-33FDZW-7 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and RF subsystems requiring stable component supply with AEC-Q100 traceability and long-term production continuity.
Supply support for AP7343Q-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, with ISO/TS 16949-certified manufacturing.
The AP7343Q belongs to Diodes' automotive-grade LDO portfolio, engineered specifically for noise-sensitive point-of-load regulation in infotainment, ADAS, and telematics systems operating across extended temperature ranges.
FAQ
What is the maximum allowable input voltage for AP7343Q-33FDZW-7?
The absolute maximum input voltage is 6.0V, but the recommended operating range is 1.7V to 5.25V. Exceeding 5.25V may cause permanent damage or degrade long-term reliability, even if within absolute maximum ratings. Operation above 5.25V voids AEC-Q100 qualification guarantees.
Can the EN pin be left unconnected?
No-the EN pin must never be left floating. It must be actively driven high (≥1.3V) to enable regulation or pulled low (≤0.5V) to enter shutdown. If unused, tie EN directly to VIN via a low-impedance connection to ensure reliable turn-on behavior across temperature and voltage corners.
Is the exposed pad (EP) electrically connected to GND internally?
No-the EP is not internally connected to any circuit node. It serves solely as a thermal conduction path. For optimal thermal performance, solder it to a ≥40mm² GND copper pour; do not rely on it as a functional GND electrode, as this may compromise thermal resistance and electrical isolation.
Does AP7343Q-33FDZW-7 include output discharge functionality?
No-AP7343Q-33FDZW-7 is the non-discharge variant (as indicated by "Q" suffix and absence of "D" in part number). It lacks an internal pull-down transistor on VOUT; external discharge circuitry is required if fast VOUT decay is needed during shutdown.
AP7343Q-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)
AP7343Q-33FDZW-7 FAQ
1.How can I place an order for AP7343Q-33FDZW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7343Q-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 AP7343Q-33FDZW-7 reliable?
The price and inventory of AP7343Q-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 AP7343Q-33FDZW-7 is usually 5 days.
3.What payment methods are accepted for AP7343Q-33FDZW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343Q-33FDZW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7343Q-33FDZW-7?
AP7343Q-33FDZW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7343Q-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 AP7343Q-33FDZW-7?
For technical support, including AP7343Q-33FDZW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343Q-33FDZW-7 requirements.
6.How does Aetrix verify that AP7343Q-33FDZW-7 is sourced from the original manufacturer or authorized distributors?
All AP7343Q-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 AP7343Q-33FDZW-7 meets industry standards.
7.What is the process for return or replacement of AP7343Q-33FDZW-7?
All AP7343Q-33FDZW-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343Q-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 AP7343Q-33FDZW-7 part is unused and in its original packaging.
Return procedure for AP7343Q-33FDZW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP7343Q-33FDZW-7 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
