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Diodes Incorporated AP7343Q-27W5-7
- Part No.:
- AP7343Q-27W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7343Q-27W5-7.pdf
- Description:
- IC REG LINEAR 2.7V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:2,960
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Product details
Overview
AP7343Q-27W5-7 from Diodes Incorporated is an AEC-Q100 Grade 1 qualified automotive LDO regulator delivering 300mA output current with ±1% VOUT accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). It operates from 1.7V to 5.25V input and provides a fixed 2.7V output in SOT25 package-designed for noise-sensitive power rails in ADAS camera modules and infotainment RF supplies.
For engineers reviewing the AP7343Q-27W5-7 datasheet, AP7343Q-27W5-7 pinout, AP7343Q-27W5-7 application, or AP7343Q-27W5-7 equivalent, this page delivers verified technical context, validated pin functions, automotive-grade thermal performance data, and real-world use-case constraints for low-noise POL deployment in harsh-temperature environments.
Technical Context
The AP7343Q-27W5-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and enable control logic-no external discharge FET required. Its architecture achieves 0.31V dropout at 300mA for 2.7V output, enabling stable regulation even under cold-crank conditions down to 1.7V VIN.
Thermal protection includes +150°C junction shutdown with +20°C hysteresis, while the SOT25 package delivers θJA = 179°C/W. The EN pin accepts 1.3V–5.25V logic-high to activate regulation and supports <1.0µA leakage in shutdown mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.7V ±1% at TA = +25°C; maintains accuracy across –40°C to +125°C ambient. |
| Max Output Current | 300mA guaranteed continuous output; foldback short-circuit current limited to 55mA. |
| PSRR | 75dB at 1kHz-rejects ripple from switching DC/DC stages feeding automotive RF ICs. |
| Output Noise | 60µVrms (10Hz–100kHz)-enables clean supply for high-gain analog front-ends in camera sensors. |
| Quiescent Current | 35µA typical-minimizes standby power loss in always-on ADAS subsystems. |
| Dropout Voltage | 0.31V max at 300mA output-supports operation during 12V battery sag to 6.5V system rail. |
| Operating Temp | –40°C to +125°C ambient-qualified per AEC-Q100 Grade 1 for under-hood and cabin applications. |
Pinout & Package
SOT25 package (5-pin, 2.9mm × 2.8mm × 1.3mm) with exposed pad not electrically connected-requires PCB copper area tied to GND for thermal dissipation. Pin 4 is NC and must be grounded for optimal thermal performance.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input power pin; requires ≥0.47µF ceramic capacitor placed adjacent to minimize input impedance. |
| 2 | EN | Active-high enable; must be driven to ≥1.3V to activate regulator; floating state prohibited. |
| 3 | GND | Power ground reference; connects directly to PCB ground plane to reduce trace impedance. |
| 4 | NC | No internal connection; recommended to tie to GND for enhanced thermal conduction via PCB copper. |
| 5 | VOUT | Regulated 2.7V output; requires ≥1µF ceramic capacitor placed within 3mm of pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1, PPAP-capable, manufactured in IATF 16949 certified facilities. |
| Low-noise regulation | 60µVrms output noise enables direct powering of RF transceivers and image sensor analog blocks. |
| High PSRR at low frequency | 75dB rejection at 1kHz suppresses switching noise from upstream buck converters in multi-rail systems. |
| Ultra-low quiescent current | 35µA IQ allows >10-year battery backup runtime in always-on vehicle telematics modules. |
| Thermal robustness | +150°C shutdown with +20°C hysteresis prevents latch-up during sustained overloads in sealed enclosures. |
Applications
| Infotainment Power Supplies | Automotive RF Supplies |
|---|---|
Use Scenario: Powering AM/FM tuner ICs and digital audio processors in head units. IC Role / Device Role / Timing Role: Primary low-noise post-regulator for sensitive RF and ADC sections. Use Value: 60µVrms noise floor prevents audible hiss and spurious signal generation in audio band. |
Use Scenario: Supplying 2.7V bias to LTE/V2X transceiver front-ends. IC Role / Device Role / Timing Role: Clean POL regulator isolating RF section from noisy main 5V domain. Use Value: 75dB PSRR at 1kHz eliminates coupling of switching artifacts into receive sensitivity. |
| Cameras | Automotive POL in ADAS |
Use Scenario: Providing 2.7V to CIS analog pixel arrays and column ADCs in surround-view cameras. IC Role / Device Role / Timing Role: Low-dropout, low-noise local regulator for image sensor analog core. Use Value: ±1% VOUT accuracy ensures consistent pixel response across temperature and load variation. |
Use Scenario: Powering radar SoC I/O banks and SerDes interfaces in forward collision warning systems. IC Role / Device Role / Timing Role: Point-of-load regulator meeting AEC-Q100 transient and thermal requirements. Use Value: 300mA capability with 0.31V dropout sustains operation during 12V battery dips to 6.5V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7343DQ-27W5-7 | Includes integrated output discharge FET (100Ω typical); AP7343Q-27W5-7 lacks discharge path. | Required where fast VOUT ramp-down is needed after EN deactivation (e.g., sequencing-critical radar modules). | Select DQ variant only if controlled discharge is mandated by system-level power sequencing spec. |
| TLD1120FV | Higher 500mA output, wider 2.5V–42V input range, but 120µVrms noise and 45µA IQ. | Better suited for high-current CAN/LIN interface rails; less optimal for ultra-low-noise RF/camera use. | Choose TLD1120FV when higher current or extended input range outweighs noise and IQ penalties. |
Compared with AP7343DQ-27W5-7, the AP7343Q-27W5-7 reduces BOM count by eliminating need for external discharge resistor, while versus TLD1120FV it trades current headroom for superior noise and efficiency in signal-chain critical rails.
Availability
AP7343Q-27W5-7 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and wireless communications requiring stable component supply with full AEC-Q100 documentation support.
Supply support for AP7343Q-27W5-7 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 devices for automotive, industrial, and consumer markets.
The AP7343Q belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for noise-sensitive point-of-load regulation in ADAS, infotainment, and telematics systems operating across –40°C to +125°C.
FAQ
What is the minimum input voltage required for AP7343Q-27W5-7 to maintain regulation at full 300mA load?
The AP7343Q-27W5-7 requires VIN ≥ 3.01V (2.7V + 0.31V dropout) to sustain 300mA output. At –40°C, dropout increases marginally; design margin should include 0.05V derating. Below 3.01V, output voltage drops linearly with input.
Can the NC pin (Pin 4) be left floating on the SOT25 package?
No-Pin 4 is internally unconnected but thermally coupled to the die. Diodes Incorporated explicitly recommends connecting it to GND via PCB copper to maximize heat dissipation. Floating NC pins degrade θJA by up to 15°C/W in standard JEDEC layouts.
Does AP7343Q-27W5-7 require an external discharge resistor for safe shutdown?
No. Unlike the AP7343DQ variant, the AP7343Q-27W5-7 has no internal discharge FET. If rapid VOUT decay is required after EN deactivation, an external 10kΩ–100kΩ pull-down resistor between VOUT and GND must be added per application needs.
How does the 60µVrms noise specification translate to actual SNR impact in a 12-bit camera ADC?
At 60µVrms over 10Hz–100kHz, the noise contributes ≈1.2 LSB RMS for a 2.7V full-scale 12-bit ADC (LSB = 660µV). This preserves >72dB SNR-within spec for automotive surround-view sensors requiring ≤2 LSB noise floor.
AP7343Q-27W5-7 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):
- 2.7V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.32V @ 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-27W5-7 FAQ
1.How can I place an order for AP7343Q-27W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7343Q-27W5-7 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-27W5-7 reliable?
The price and inventory of AP7343Q-27W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7343Q-27W5-7 is usually 5 days.
3.What payment methods are accepted for AP7343Q-27W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343Q-27W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7343Q-27W5-7?
AP7343Q-27W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7343Q-27W5-7 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-27W5-7?
For technical support, including AP7343Q-27W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343Q-27W5-7 requirements.
6.How does Aetrix verify that AP7343Q-27W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7343Q-27W5-7 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-27W5-7 meets industry standards.
7.What is the process for return or replacement of AP7343Q-27W5-7?
All AP7343Q-27W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343Q-27W5-7, 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-27W5-7 part is unused and in its original packaging.
Return procedure for AP7343Q-27W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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