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Diodes Incorporated AP7343DQ-09W5-7
- Part No.:
- AP7343DQ-09W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7343DQ-09W5-7.pdf
- Description:
- IC REG LINEAR 0.9V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:2,573
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Product details
Overview
AP7343DQ-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 - designed for noise-sensitive power rails in ADAS camera modules and infotainment SoC core supplies.
For engineers reviewing the AP7343DQ-09W5-7 datasheet, AP7343DQ-09W5-7 pinout, AP7343DQ-09W5-7 application, or AP7343DQ-09W5-7 equivalent, key selection criteria include guaranteed 300mA output under 1.7V–5.25V input, AEC-Q100 Grade 1 qualification, thermal shutdown at +150°C, and SOT25 package compatibility with automotive PCB layout constraints.
Technical Context
The AP7343DQ-09W5-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and enable control logic. Its architecture delivers fast load transient response (<100µs settling time) and stable operation with 1µF ceramic output capacitors, enabling compact POL designs in space-constrained automotive modules.
This variant includes an internal discharge FET (enabled by "D" in part number), actively pulling VOUT to GND during shutdown to prevent back-powering of downstream circuitry - a critical requirement for rail sequencing in multi-voltage automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 0.9V ±1% - ensures stable core supply for low-voltage processors and SerDes PHYs without external feedback resistors. |
| Max Output Current | 300mA continuous - supports single-core MCU or image sensor digital domain without derating at +125°C ambient. |
| PSRR | 75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding RF or analog sensor blocks. |
| Output Noise | 60µVrms (10Hz–100kHz) - minimizes jitter in clock-sensitive interfaces like MIPI CSI-2 and LVDS video links. |
| Quiescent Current | 35µA typical - enables always-on functionality in vehicle wake-up circuits while meeting ISO 26262 standby power budgets. |
| Dropout Voltage | 0.51V max at 300mA (VOUT = 0.9V) - allows operation from 1.7V input, compatible with degraded battery conditions down to 9V system voltage. |
| Operating Temp | -40°C to +125°C junction - validated for under-hood and cabin-mounted ADAS ECUs per AEC-Q100 Grade 1 requirements. |
Pinout & Package
AP7343DQ-09W5-7 is packaged in SOT25 (5-pin, 2.9mm × 2.8mm × 1.3mm), optimized for thermal performance in high-density automotive PCBs. The exposed pad is not electrically connected but must be soldered to a large copper pour tied to GND for optimal heat dissipation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main power input; requires ≥0.47µF ceramic decoupling capacitor placed within 2mm to suppress supply transients. |
| 2 | EN | Active-high enable; threshold is 1.3V min high / 0.5V max low - compatible with 1.8V/3.3V GPIO without level-shifting. |
| 3 | GND | Analog/digital ground reference; must connect directly to low-impedance PCB ground plane to minimize noise coupling. |
| 4 | VOUT | Regulated 0.9V output; routed with short, wide traces to reduce IR drop and inductive ringing in high-dI/dt loads. |
| 5 | NC | No-connect terminal; recommended to tie to GND for enhanced thermal conduction via PCB copper fill. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 qualified, PPAP-capable, manufactured in IATF 16949 certified facilities - meets OEM Tier-1 sourcing requirements. |
| Integrated discharge FET | 30Ω on-resistance enables active VOUT discharge during shutdown - prevents backfeed into powered-down domains and simplifies power sequencing. |
| Ultra-low noise | 60µVrms output noise eliminates need for additional LC filtering in RF and high-speed serial interface supplies. |
| High PSRR across frequency | 75dB at 1kHz and >40dB up to 1MHz - maintains clean supply under coupled noise from buck converters and CAN transceivers. |
| Thermal protection | +150°C junction shutdown with +20°C hysteresis - prevents latch-up during sustained overload or poor heatsinking in sealed enclosures. |
Applications
| Infotainment Power Supply | ADAS Camera Core Rail |
|---|---|
Use Scenario: Powering ARM Cortex-A72 application processor cores in head-unit infotainment systems. IC Role / Device Role / Timing Role: Primary 0.9V core LDO delivering stable voltage under dynamic CPU load changes. Use Value: 300mA capacity and <100µs transient response prevent brownouts during burst processing; 60µVrms noise avoids audio codec distortion. |
Use Scenario: Supplying image signal processor (ISP) digital core in front-facing ADAS cameras. IC Role / Device Role / Timing Role: Low-noise POL regulator for ISP logic domain requiring tight voltage tolerance and minimal jitter coupling. Use Value: ±1% output accuracy ensures consistent timing margins; 75dB PSRR isolates ISP from switching noise generated by nearby DC/DC converters. |
| Automotive RF Transceiver Supply | Wireless Connectivity Module |
Use Scenario: Biasing RF front-end ICs (e.g., LTE/V2X transceivers) in telematics control units. IC Role / Device Role / Timing Role: Clean 0.9V auxiliary rail decoupled from noisy main power domains. Use Value: 60µVrms noise floor preserves EVM performance; discharge FET prevents RF IC latch-up during hot-plug events. |
Use Scenario: Powering Bluetooth/Wi-Fi SoCs in automotive gateway modules operating in stop-start environments. IC Role / Device Role / Timing Role: Always-on 0.9V supply maintaining RTC and wake-on-RF functionality during vehicle sleep mode. Use Value: 35µA quiescent current extends battery backup duration; -40°C to +125°C rating ensures reliability across all vehicle operating 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-09W5-7 | No internal discharge FET; EN-controlled shutdown only - VOUT floats after disable. | Suitable where back-powering is not a concern and simpler BOM is prioritized. | Select when discharge function is unnecessary and cost reduction is critical. |
| TLD1120FV | 200mA rated, 1.2V fixed output, higher dropout (0.6V @200mA), no discharge FET. | Limited to lower-current logic rails; incompatible with 0.9V core voltage requirements. | Use only for non-core auxiliary rails where 0.9V and 300mA are not required. |
Compared with AP7343Q-09W5-7 and TLD1120FV, the AP7343DQ-09W5-7 uniquely combines 0.9V/300mA capability, automotive qualification, and active discharge - making it the only direct fit for safety-critical 0.9V core supplies requiring controlled power-down sequencing.
Availability
AP7343DQ-09W5-7 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, RF transceiver power supplies, and wireless connectivity gateways requiring stable component supply with full AEC-Q100 traceability.
Supply support for AP7343DQ-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, with over 50 years of power management expertise.
The AP7343Q series belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for noise-sensitive, high-reliability power domains in ADAS, infotainment, and body electronics.
FAQ
What is the purpose of the NC pin on AP7343DQ-09W5-7?
Pin 5 is a no-connect terminal with no internal bond wire. It is thermally connected to the die paddle and should be tied to PCB ground via a large copper area to improve heat dissipation. Leaving it floating reduces thermal performance and may compromise long-term reliability in high-ambient automotive environments.
Does AP7343DQ-09W5-7 require an external discharge resistor?
No. Unlike standard LDOs, AP7343DQ-09W5-7 integrates a dedicated NMOS discharge FET (RON = 30Ω) between VOUT and GND, activated automatically when EN is pulled low. This eliminates the need for external components and ensures rapid, controlled VOUT discharge to <100mV within 200µs.
Can AP7343DQ-09W5-7 operate with input voltage below 1.7V?
No. The absolute minimum input voltage is 1.7V per datasheet specifications. Operation below this threshold risks regulation loss, increased dropout, and potential instability. In cold-crank scenarios where battery voltage dips to 6V, the upstream 12V-to-5V DC/DC must maintain ≥1.7V at VIN - verified by testing with 1.7V applied and 300mA load.
How does the 0.9V output accuracy impact processor core stability?
±1% output accuracy (±9mV at 0.9V) ensures the regulated rail remains within the ±3% tolerance window specified for ARM Cortex-A series cores. This eliminates timing violations and prevents unexpected resets during voltage transients, directly supporting ASIL-B functional safety compliance in ADAS applications.
AP7343DQ-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, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP7343DQ-09W5-7 FAQ
1.How can I place an order for AP7343DQ-09W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7343DQ-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 AP7343DQ-09W5-7 reliable?
The price and inventory of AP7343DQ-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 AP7343DQ-09W5-7 is usually 5 days.
3.What payment methods are accepted for AP7343DQ-09W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343DQ-09W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7343DQ-09W5-7?
AP7343DQ-09W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7343DQ-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 AP7343DQ-09W5-7?
For technical support, including AP7343DQ-09W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343DQ-09W5-7 requirements.
6.How does Aetrix verify that AP7343DQ-09W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7343DQ-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 AP7343DQ-09W5-7 meets industry standards.
7.What is the process for return or replacement of AP7343DQ-09W5-7?
All AP7343DQ-09W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343DQ-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 AP7343DQ-09W5-7 part is unused and in its original packaging.
Return procedure for AP7343DQ-09W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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