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Diodes Incorporated AP7343Q-33W5-7
- Part No.:
- AP7343Q-33W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7343Q-33W5-7.pdf
- Description:
- IC REG LINEAR 3.3V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:2,385
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Product details
Overview
AP7343Q-33W5-7 from Diodes Incorporated is an automotive-grade 300mA low-dropout regulator with fixed 3.3V output, ±1% accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz), designed for noise-sensitive power rails in ADAS cameras and infotainment systems.
For engineers reviewing the AP7343Q-33W5-7 datasheet, AP7343Q-33W5-7 pinout, AP7343Q-33W5-7 application, or AP7343Q-33W5-7 equivalent, this LDO delivers high PSRR, ultra-low quiescent current (35µA), AEC-Q100 Grade 1 qualification, and SOT25 packaging optimized for space-constrained automotive PCBs.
Technical Context
The AP7343Q-33W5-7 uses a CMOS-based architecture with integrated voltage reference, error amplifier, and current-limit circuitry. Its enable input (EN) provides precise on/off control with defined logic thresholds (VIL ≤ 0.5V, VIH ≥ 1.3V) and sub-1µA standby leakage.
It features thermal shutdown at +150°C with +20°C hysteresis, foldback short-circuit protection (~55mA), and stable operation with 1µF ceramic output capacitance. Dropout voltage is 0.22V (typ.) at 300mA for VOUT = 3.3V, enabling efficient regulation from 3.52V input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% at +25°C; ensures stable MCU core or interface rail without external feedback. |
| Max Output Current | 300mA guaranteed; supports dual-core microcontrollers or multi-sensor camera modules. |
| PSRR | 75dB at 1kHz; suppresses switching noise from upstream DC/DC converters in automotive power trees. |
| Output Noise | 60µVrms (10Hz–100kHz); preserves signal integrity in RF receivers and high-speed ADC references. |
| Quiescent Current | 35µA typical; extends battery runtime in always-on vehicle subsystems like telematics wake-up circuits. |
| Input Voltage Range | 1.7V to 5.25V; compatible with 3.3V or 5V pre-regulated supplies and tolerates cold-crank dips down to 1.7V. |
| Operating Temp | -40°C to +125°C ambient; meets under-hood and cabin-mounted automotive environmental requirements. |
Pinout & Package
AP7343Q-33W5-7 is packaged in SOT25 (5-pin, 2.9mm × 2.8mm × 1.3mm), offering minimal footprint and compatibility with standard pick-and-place equipment. The exposed pad is absent in this variant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main power input; requires local 0.47µF ceramic decoupling to maintain stability during load transients. |
| 2 | EN | Active-high enable; must be driven to ≥1.3V to activate regulator; floating state is prohibited. |
| 3 | GND | Analog/digital ground reference; connects directly to PCB ground plane to minimize noise coupling. |
| 4 | VOUT | Regulated 3.3V output; routed with low-impedance trace to load; bypassed with 1µF ceramic capacitor. |
| 5 | NC | No-connect terminal; recommended to tie to GND for improved thermal dissipation and EMI shielding. |
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 + 60µVrms noise enables clean power for RF ICs and high-resolution image sensors. |
| Ultra-Low Quiescent Current | 35µA typical draw allows integration into always-on domains (e.g., CAN wake-up controllers) without excessive battery drain. |
| Thermal Protection | +150°C shutdown with +20°C hysteresis prevents latch-up during sustained overload or poor heatsinking. |
| Small-Signal Stability | Stable with 1µF ceramic output capacitor; eliminates need for large tantalum or polymer bulk caps in space-limited modules. |
Applications
| Infotainment Power Supplies | Automotive RF Supplies |
|---|---|
|
Use Scenario: Powering SoC cores, display interfaces, and audio codecs in head-unit systems. IC Role / Device Role / Timing Role: Primary 3.3V LDO delivering low-noise bias to sensitive analog blocks and digital I/O banks. Use Value: ±1% output accuracy and 75dB PSRR prevent clock jitter and data corruption caused by DC/DC ripple. |
Use Scenario: Supplying LNAs, mixers, and PLLs in V2X and cellular telematics modules. IC Role / Device Role / Timing Role: Clean post-regulator for RF signal chains requiring minimal phase noise degradation. Use Value: 60µVrms noise floor avoids reciprocal mixing and maintains receiver sensitivity below -100dBm. |
| Cameras | Automotive POL in ADAS |
|
Use Scenario: Biasing CMOS image sensors and ISP processors in surround-view and driver-monitoring cameras. IC Role / Device Role / Timing Role: Dedicated 3.3V rail isolating sensor analog front-end from noisy digital domains. Use Value: Fast load transient response (<100µs recovery) maintains image uniformity during scene brightness changes. |
Use Scenario: Point-of-load regulation for radar MMICs, LiDAR timing controllers, and fusion ECUs. IC Role / Device Role / Timing Role: Secondary LDO providing fault-isolated 3.3V supply downstream of main PMIC. Use Value: Built-in short-circuit foldback (55mA limit) protects upstream converters during sensor cable faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7361Q-33W5-7 | 600mA output current, higher dropout (0.35V @ 600mA), same 3.3V/±1% accuracy and PSRR. | Suitable for higher-current loads like multi-lane MIPI bridges; requires larger thermal margin. | Select when >300mA peak load exists and board layout allows slightly higher power dissipation. |
| TLD1130FV50 | 300mA, 5V output, integrated reverse-battery protection, lower PSRR (65dB @ 1kHz), higher IQ (65µA). | Designed for direct-battery-fed 5V rails with fault tolerance; not drop-in for 3.3V systems. | Choose only if reverse-polarity protection is mandatory and 5V-not 3.3V-is required. |
Compared with AP7343Q-33W5-7, AP7361Q-33W5-7 trades higher current capability for increased thermal load, while TLD1130FV50 adds system-level protection at the cost of noise performance and voltage mismatch-neither offers identical 3.3V/low-noise/low-IQ synergy.
Availability
AP7343Q-33W5-7 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and wireless telematics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AP7343Q-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, with ISO/TS 16949-certified manufacturing.
The AP7343Q belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for noise-critical, high-reliability power management in ADAS, infotainment, and body electronics.
FAQ
Is AP7343Q-33W5-7 pin-compatible with non-automotive AP7343 variants?
Yes - AP7343Q-33W5-7 shares identical SOT25 pinout, electrical behavior, and thermal characteristics with standard AP7343 parts. The "Q" suffix denotes AEC-Q100 qualification and PPAP-capable manufacturing, but no pin or functional differences exist.
What is the minimum input voltage required to sustain 3.3V output at 300mA?
The maximum dropout voltage at 300mA and 3.3V output is 0.31V (per datasheet Table 2). Therefore, minimum valid input is 3.3V + 0.31V = 3.61V. At 1.7V input, output cannot be regulated - the device enters dropout and output drops linearly.
Can the EN pin be left unconnected if always-on operation is needed?
No - the EN pin must never float. For always-on use, connect EN directly to VIN. Leaving it open risks undefined startup behavior, intermittent regulation, or excessive current draw due to internal leakage paths.
Does AP7343Q-33W5-7 include output discharge functionality?
No - the "Q" suffix without "D" (e.g., AP7343DQ) indicates non-discharge version. When disabled, VOUT remains floating and does not actively discharge through an internal FET. External bleed resistors may be needed for fast turn-off in safety-critical sequences.
AP7343Q-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, 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
AP7343Q-33W5-7 FAQ
1.How can I place an order for AP7343Q-33W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7343Q-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 AP7343Q-33W5-7 reliable?
The price and inventory of AP7343Q-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 AP7343Q-33W5-7 is usually 5 days.
3.What payment methods are accepted for AP7343Q-33W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343Q-33W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7343Q-33W5-7?
AP7343Q-33W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7343Q-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 AP7343Q-33W5-7?
For technical support, including AP7343Q-33W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343Q-33W5-7 requirements.
6.How does Aetrix verify that AP7343Q-33W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7343Q-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 AP7343Q-33W5-7 meets industry standards.
7.What is the process for return or replacement of AP7343Q-33W5-7?
All AP7343Q-33W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343Q-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 AP7343Q-33W5-7 part is unused and in its original packaging.
Return procedure for AP7343Q-33W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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