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Diodes Incorporated AP7343Q-09W5-7
- Part No.:
- AP7343Q-09W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7343Q-09W5-7.pdf
- Description:
- IC REG LINEAR 0.9V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:14,634
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Product details
Overview
AP7343Q-09W5-7 from Diodes Incorporated is an automotive-grade 300mA low-dropout linear regulator with fixed 0.9V output, ±1% accuracy, 75dB PSRR at 1kHz, 60µVrms output noise (10Hz–100kHz), and 35µA quiescent current. It operates from 1.7V to 5.25V input and supports -40°C to +125°C ambient temperature, targeting noise-sensitive power domains in ADAS cameras and RF subsystems.
For engineers reviewing the AP7343Q-09W5-7 datasheet, AP7343Q-09W5-7 pinout, AP7343Q-09W5-7 application, or AP7343Q-09W5-7 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, SOT25 package thermal performance (θJA = 179°C/W), enable-controlled shutdown (ISTANDBY = 0.01µA), and dropout voltage of 0.51V at 300mA for 0.9V output.
Technical Context
The AP7343Q-09W5-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and thermal shutdown protection. Its architecture delivers fast line/load transient response without requiring external compensation, enabled by internal stability optimization for ceramic capacitors as small as 1µF.
It features a dedicated EN pin with defined logic thresholds (VEN(H) ≥ 1.3V, VEN(L) ≤ 0.5V), no-connect pins optimized for thermal dissipation, and a non-discharge output configuration-distinguishing it from the AP7343DQ variant which includes auto-discharge functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 0.9V ±1% at +25°C; ensures stable core supply for low-voltage SoCs and sensors. |
| Max Output Current | 300mA guaranteed; supports multiple rail loads in compact automotive modules. |
| PSRR | 75dB at 1kHz; suppresses switching noise from upstream DC/DC converters in mixed-signal systems. |
| Output Noise | 60µVrms (10Hz–100kHz); critical for analog front-ends in camera ISPs and RF receivers. |
| Quiescent Current | 35µA typical; enables always-on functionality in vehicle wake-up circuits without battery drain. |
| Dropout Voltage | 0.51V at 300mA (0.9V output); allows operation from 1.41V input, extending usable battery range. |
| Operating Temp | -40°C to +125°C ambient; qualified per AEC-Q100 Grade 1 for under-hood and infotainment environments. |
Pinout & Package
AP7343Q-09W5-7 is packaged in SOT25 (5-pin, 2.9mm × 2.8mm × 1.3mm), optimized for high-density automotive PCBs with exposed pad thermal management capability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Power Input | Accepts 1.7V–5.25V input; requires local 0.47µF ceramic decoupling placed adjacent to pin. |
| 2 (EN) | Enable Control | Active-high logic input; must be driven to ≥1.3V to enable regulation, ≤0.5V to enter shutdown (ISTANDBY = 0.01µA). |
| 3 (GND) | Ground Reference | Primary return path for load current and internal bias; connects to PCB ground plane for thermal and noise control. |
| 4 (VOUT) | Regulated Output | Delivers fixed 0.9V ±1%; requires 1µF ceramic output capacitor placed near load for stability. |
| 5 (NC) | No Connect | Internally unconnected; recommended to tie to GND for enhanced thermal conduction via PCB copper. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Qualification | AEC-Q100 Grade 1 qualified, PPAP-capable, manufactured in IATF 16949 facilities-enables direct use in safety-critical ECUs. |
| Low-Noise Regulation | 60µVrms integrated noise floor enables clean power for image signal processors and RF synthesizers. |
| High PSRR Architecture | 75dB rejection at 1kHz reduces sensitivity to ripple from buck converters feeding multi-rail power trees. |
| Ultra-Low Quiescent Current | 35µA operating / 0.01µA shutdown current supports long-duration vehicle sleep modes without parasitic drain. |
| Thermally Optimized Package | SOT25 with thermal pad achieves θJA = 179°C/W on JEDEC High-K board-supports 300mA continuous load at +105°C ambient. |
Applications
| Infotainment Power Supplies | Automotive RF Supplies |
|---|---|
|
Use Scenario: Powering audio DSP cores and display interface ICs in head-unit systems. IC Role / Device Role / Timing Role: Primary 0.9V LDO delivering ultra-low-noise bias for mixed-signal SoCs. Use Value: 60µVrms noise prevents audible artifacts in Class-D amplifiers and jitter-induced pixel errors in LVDS video links. |
Use Scenario: Supplying local oscillator buffers and mixer bias in cellular/V2X modems. IC Role / Device Role / Timing Role: Clean 0.9V rail isolating RF section from noisy digital domain. Use Value: 75dB PSRR at 1kHz attenuates switching noise from PMICs, preserving EVM and receiver sensitivity. |
| Cameras | Automotive POL in ADAS |
|
Use Scenario: Biasing CIS analog front-end and ISP core in surround-view and driver-monitoring cameras. IC Role / Device Role / Timing Role: Low-dropout, low-noise post-regulator for image sensor pixel arrays. Use Value: 0.51V dropout at 300mA enables operation from 1.41V input-critical for single-cell LiFePO₄ backup rails. |
Use Scenario: Point-of-load regulation for radar SoC memory interfaces and ADC reference buffers. IC Role / Device Role / Timing Role: Automotive-qualified 0.9V LDO supporting ASIL-B functional safety requirements. Use Value: -40°C to +125°C operation and AEC-Q100 qualification ensure reliability in engine bay and radar module enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7343Q-09FDZW-7 | Same electrical specs, but W-DFN2020-6 (SWP) Type A1 package (θJA = 54°C/W vs. 179°C/W). | Better thermal performance in space-constrained modules; requires wettable flank solder inspection. | Select when board area is limited and thermal margin is critical-especially in stacked ADAS camera modules. |
| TLD1120FV | Infineon automotive LDO; 0.9V output, 300mA, but higher IQ (60µA) and lower PSRR (65dB @ 1kHz). | Designed for LED driver bias; lacks same noise performance for RF/camera use cases. | Consider only if existing design uses Infineon ecosystem and 10dB PSRR margin loss is acceptable. |
Compared with AP7343Q-09W5-7, the FDZW variant improves thermal resistance by 69% but adds solder inspection complexity, while TLD1120FV trades noise/PSRR performance for broader LED-driver feature integration-making AP7343Q-09W5-7 optimal for noise-critical, thermally constrained automotive LDO applications.
Availability
AP7343Q-09W5-7 is available at Aetrix Electronics and suitable for infotainment power supplies, automotive RF supplies, and ADAS camera modules requiring stable component supply across extended temperature ranges and automotive qualification traceability.
Supply support for AP7343Q-09W5-7 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 belongs to Diodes' automotive-qualified LDO portfolio, designed specifically for noise-sensitive point-of-load regulation in ADAS, infotainment, and telematics systems demanding AEC-Q100 compliance and PPAP readiness.
FAQ
What is the minimum input voltage required for AP7343Q-09W5-7 to regulate 0.9V output at 300mA?
The minimum input voltage is determined by dropout: 0.9V + 0.51V = 1.41V. However, the datasheet specifies a minimum operating VIN of 1.7V across temperature and process variation. At 1.7V input, the device maintains regulation with full 300mA output capability and meets all electrical specifications including PSRR and noise performance.
Can AP7343Q-09W5-7 be used without an external output capacitor?
No. An output capacitor is mandatory for stability and transient response. The datasheet requires a minimum 1µF ceramic capacitor placed close to VOUT and GND pins. Omitting COUT causes oscillation and violates absolute maximum ratings due to uncontrolled loop gain and potential thermal runaway under load.
How does the NC pin function in the SOT25 package, and what is the recommended PCB layout?
The NC pin (Pin 5) is not connected internally. Diodes recommends connecting it to GND on the PCB to maximize copper area for heat spreading from the die through the leadframe. This improves thermal resistance by up to 15% compared to leaving it floating, especially critical in high-ambient automotive environments.
Is AP7343Q-09W5-7 compatible with lead-free reflow profiles, and what is its MSL rating?
Yes-AP7343Q-09W5-7 is fully RoHS 3 compliant and rated MSL1 (Moisture Sensitivity Level 1), meaning it can be stored indefinitely at ≤30°C/85% RH and withstand standard JEDEC J-STD-020 lead-free reflow profiles (peak 260°C) without baking or special handling.
AP7343Q-09W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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):
- 0.9V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.82V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 60 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP7343Q-09W5-7 FAQ
1.How can I place an order for AP7343Q-09W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7343Q-09W5-7 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-09W5-7 reliable?
The price and inventory of AP7343Q-09W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7343Q-09W5-7 is usually 5 days.
3.What payment methods are accepted for AP7343Q-09W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343Q-09W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7343Q-09W5-7?
AP7343Q-09W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7343Q-09W5-7 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-09W5-7?
For technical support, including AP7343Q-09W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343Q-09W5-7 requirements.
6.How does Aetrix verify that AP7343Q-09W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7343Q-09W5-7 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-09W5-7 meets industry standards.
7.What is the process for return or replacement of AP7343Q-09W5-7?
All AP7343Q-09W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343Q-09W5-7, 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-09W5-7 part is unused and in its original packaging.
Return procedure for AP7343Q-09W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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