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Diodes Incorporated AP7343DQ-33W5-7
- Part No.:
- AP7343DQ-33W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7343DQ-33W5-7.pdf
- Description:
- IC REG LINEAR 3.3V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:65,347
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Product details
Overview
AP7343DQ-33W5-7 from Diodes Incorporated is an automotive-grade 300mA low-dropout linear regulator with fixed 3.3V output, ±1% accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). It features enable control, thermal shutdown, short-circuit protection, and operates across -40°C to +125°C - designed for noise-sensitive automotive power rails including ADAS camera sensors and infotainment domain controllers.
For engineers reviewing the AP7343DQ-33W5-7 datasheet, AP7343DQ-33W5-7 pinout, AP7343DQ-33W5-7 application, or AP7343DQ-33W5-7 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, SOT25 package thermal performance (θJA = 179°C/W), 35µA quiescent current, and guaranteed 300mA output under 1.7V–5.25V input range.
Technical Context
The AP7343DQ-33W5-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and thermal shutdown logic. Its architecture supports fast load transient response (≤100µs recovery) and stable operation with 1µF ceramic output capacitors.
Unlike standard LDOs, this variant includes an internal discharge FET activated during shutdown (EN = low), reducing VOUT decay time by actively pulling output to GND - critical for sequencing in multi-rail automotive systems where controlled power-down is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% at +25°C; ensures stable core voltage for 3.3V microcontrollers and SerDes interfaces. |
| Max Output Current | 300mA continuous; sufficient to power dual-core automotive MCUs or high-speed CAN transceivers. |
| PSRR | 75dB at 1kHz; suppresses switching noise from adjacent DC/DC converters in shared PCB power domains. |
| Output Noise | 60µVrms (10Hz–100kHz); meets stringent RF supply requirements for automotive radar receivers and GNSS front-ends. |
| Quiescent Current | 35µA typical; enables always-on functionality in vehicle body control modules without excessive battery drain. |
| Dropout Voltage | 0.22V at 300mA (VOUT = 3.3V); allows operation down to 3.52V input - compatible with degraded 12V battery conditions (e.g., cold crank). |
| Operating Temp | -40°C to +125°C junction; validated for under-hood placement per AEC-Q100 Grade 1 requirements. |
Pinout & Package
AP7343DQ-33W5-7 uses the SOT25 (5-pin) surface-mount package with exposed pad omitted - optimized for compact automotive PCB layouts and thermal dissipation via PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Power Input | Accepts 1.7V–5.25V input; requires ≥0.47µF ceramic decoupling capacitor placed adjacent to pin. |
| 2 (EN) | Enable Control | Active-high logic input; must be driven to ≥1.3V to enable regulation; floating state disables device. |
| 3 (GND) | Ground Reference | Primary return path for input/output current; connects to system ground plane to minimize noise coupling. |
| 4 (VOUT) | Regulated Output | Delivers fixed 3.3V ±1%; includes internal discharge FET to rapidly sink output charge during shutdown. |
| 5 (NC) | No Connect | Internally unconnected; recommended to tie to GND for improved thermal conduction and EMI shielding. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 Qualified | Validated for automotive use up to +125°C junction temperature with PPAP documentation support. |
| Integrated Output Discharge | Active pull-down FET discharges VOUT within microseconds upon EN deactivation - eliminates hold-up voltage in safety-critical shutdown sequences. |
| Ultra-Low Output Noise | 60µVrms over 10Hz–100kHz band enables direct powering of RF ICs without additional filtering stages. |
| High PSRR at Low Frequencies | 75dB rejection at 1kHz suppresses ripple from upstream buck converters operating at ~500kHz switching frequency. |
| Wide Input Voltage Range | 1.7V–5.25V operation supports direct connection to 3.3V or 5V intermediate rails and accommodates battery voltage sag. |
Applications
| Infotainment Power Supply | ADAS Camera Sensor Rail |
|---|---|
Use Scenario: Stable 3.3V rail for SoC I/O, display interface, and audio codec in head-unit systems. IC Role / Device Role / Timing Role: Primary post-regulator delivering clean, sequenced power after main DC/DC converter. Use Value: 75dB PSRR prevents AM/FM receiver desensitization caused by digital switching noise on shared PCB layers. |
Use Scenario: Powering image sensor analog front-end and ISP core in surround-view camera modules. IC Role / Device Role / Timing Role: Low-noise bias source ensuring <1 LSB error in 12-bit ADC conversion paths. Use Value: 60µVrms noise floor maintains SNR > 68dB for high-dynamic-range automotive imaging. |
| Automotive RF Transceiver Supply | Wireless V2X Communication Module |
Use Scenario: Dedicated LDO rail for LTE/C-V2X transceiver RF sections requiring ultra-low phase noise. IC Role / Device Role / Timing Role: Isolated noise-sensitive supply decoupled from noisy digital baseband domain. Use Value: Sub-100µVrms noise ensures EVM < 3% in 5MHz LTE uplink transmission under worst-case thermal conditions. |
Use Scenario: Power management for DSRC or C-V2X OBU modules operating in extended temperature environments. IC Role / Device Role / Timing Role: Always-on regulator maintaining real-time clock and wake-up circuitry during sleep mode. Use Value: 35µA quiescent current enables >10-year battery-backed operation in parking-assist edge nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TPS7B8133QDCYRQ1 | 300mA, 3.3V, ±1%, 65dB PSRR @ 1kHz, 40µVrms, no integrated discharge FET | Lacks active output discharge; requires external circuitry for controlled VOUT decay | Select when discharge function is unnecessary and lower noise (40µVrms) is prioritized over shutdown sequencing. |
| ON Semi NCP114AMX33T2G | 300mA, 3.3V, ±2%, 60dB PSRR @ 1kHz, 120µVrms, AEC-Q100 Grade 2 (−40°C to +105°C) | Lower PSRR and higher noise; limited to +105°C ambient - not suitable for under-hood placement | Choose only for cost-sensitive cabin applications where thermal margin is adequate and noise tolerance is relaxed. |
Compared with TPS7B8133QDCYRQ1 and NCP114AMX33T2G, the AP7343DQ-33W5-7 uniquely combines AEC-Q100 Grade 1 operation, integrated discharge, and best-in-class 75dB PSRR - making it optimal for ADAS and power-sequencing-critical automotive subsystems.
Availability
AP7343DQ-33W5-7 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and wireless V2X communication designs requiring stable component supply, AEC-Q100 compliance, and production traceability.
Supply support for AP7343DQ-33W5-7 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 company specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets.
The AP7343Q series targets automotive power management with AEC-Q100 qualification, focusing on noise-sensitive LDO applications in ADAS, infotainment, and telematics systems.
FAQ
What is the purpose of the NC pin on AP7343DQ-33W5-7?
Pin 5 is designated No Connect (NC) and is not bonded internally. Diodes Incorporated recommends connecting it to GND on the PCB to enhance thermal dissipation through increased copper area and reduce electromagnetic interference coupling into adjacent signal traces.
Does AP7343DQ-33W5-7 require an external discharge resistor?
No. Unlike the non-discharge AP7343Q variant, the 'D' suffix indicates integrated discharge FET functionality. When EN is pulled low, the internal FET actively sinks current from VOUT to GND, eliminating need for external components in power-down sequencing.
Can AP7343DQ-33W5-7 operate with a 1.8V input voltage?
No. The minimum input voltage is 1.7V, but dropout voltage at 300mA is 0.22V for 3.3V output. With 1.8V input, the maximum sustainable output is 1.58V - insufficient to maintain regulated 3.3V. Valid input range is 3.52V–5.25V for full 300mA load.
How does the thermal performance of SOT25 compare to W-DFN2020-6 packages?
SOT25 has θJA = 179°C/W, while W-DFN2020-6 (Type UXD) achieves 53.3°C/W - a 3.4× improvement. For 300mA loads at +125°C ambient, SOT25 limits power dissipation to ~390mW before thermal shutdown, whereas W-DFN supports >1.1W, enabling higher VIN–VOUT differentials in space-constrained layouts.
AP7343DQ-33W5-7 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):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.31V @ 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
AP7343DQ-33W5-7 FAQ
1.How can I place an order for AP7343DQ-33W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7343DQ-33W5-7 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-33W5-7 reliable?
The price and inventory of AP7343DQ-33W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7343DQ-33W5-7 is usually 5 days.
3.What payment methods are accepted for AP7343DQ-33W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343DQ-33W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7343DQ-33W5-7?
AP7343DQ-33W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7343DQ-33W5-7 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-33W5-7?
For technical support, including AP7343DQ-33W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343DQ-33W5-7 requirements.
6.How does Aetrix verify that AP7343DQ-33W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7343DQ-33W5-7 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-33W5-7 meets industry standards.
7.What is the process for return or replacement of AP7343DQ-33W5-7?
All AP7343DQ-33W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343DQ-33W5-7, 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-33W5-7 part is unused and in its original packaging.
Return procedure for AP7343DQ-33W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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