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Diodes Incorporated AP7343DQ-27FDZW-7
- Part No.:
- AP7343DQ-27FDZW-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
AP7343DQ-27FDZW-7.pdf
- Description:
- LDO CMOS LOWCURR W-DFN2020-6 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
AP7343DQ-27FDZW-7 from Diodes Incorporated is an automotive-grade 300mA low-dropout linear regulator with fixed 2.7V 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 RF supplies.
For engineers reviewing the AP7343DQ-27FDZW-7 datasheet, AP7343DQ-27FDZW-7 pinout, AP7343DQ-27FDZW-7 application, or AP7343DQ-27FDZW-7 equivalent, key selection criteria include AEC-Q100 Grade 1 qualification, W-DFN2020-6 (SWP) Type A1 thermal performance (θJA = 54°C/W), enable-controlled shutdown, and built-in discharge functionality for rapid VOUT decay.
Technical Context
The AP7343DQ-27FDZW-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and thermal shutdown protection. Its enable input (EN) provides precise on/off control with defined logic thresholds (VIL ≤ 0.5V, VIH ≥ 1.3V) and sub-1µA leakage.
This variant includes an internal N-channel discharge transistor (RON ≈ 30Ω) activated during shutdown to rapidly discharge the output capacitor - a critical feature for systems requiring controlled power sequencing and fast reset recovery in automotive domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.7V ±1% over -40°C to +125°C - ensures stable core supply for 2.7V-tolerant sensors and RF ICs. |
| Max Output Current | 300mA guaranteed - supports dual-camera or multi-rail POL applications without derating at 125°C ambient. |
| PSRR | 75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters in compact automotive PCBs. |
| Output Noise | 60µVrms (10Hz–100kHz) - preserves SNR in analog front-ends of radar receivers and audio amplifiers. |
| Quiescent Current | 35µA typical - enables always-on functionality in low-power wake-up circuits without battery drain. |
| Dropout Voltage | 0.35V max at 300mA (for VOUT = 2.7V) - allows operation from 3.05V input, compatible with degraded 3.3V bus conditions. |
| Operating Temp | -40°C to +125°C junction - validated for under-hood and dashboard-mounted ADAS modules per AEC-Q100 Grade 1. |
Pinout & Package
AP7343DQ-27FDZW-7 uses the W-DFN2020-6 (SWP) Type A1 package: 2.0mm × 2.0mm, 0.65mm pitch, exposed thermal pad (EP). The EP must be connected to GND via large copper area for optimal thermal dissipation (θJC = 17°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VOUT) | Regulated Power Output | Delivers 2.7V ±1% to load; requires 1µF ceramic capacitor placed adjacent to pin for stability and transient response. |
| 2 & 5 (NC) | No Connect | Internally unconnected; recommended to tie to GND for enhanced thermal conduction and EMI shielding. |
| 3 (GND) | Ground Reference | Primary return path for load current and internal bias; must connect directly to low-impedance ground plane. |
| 4 (EN) | Enable Control Input | Active-high logic input; drives regulator ON when ≥1.3V, OFF when ≤0.5V; must not float. |
| 6 (VIN) | Input Power Supply | Accepts 1.7V–5.25V; requires 0.47µF ceramic decoupling capacitor placed within 2mm of pin. |
| EP | Exposed Thermal Pad | Not electrically functional as GND; soldered to PCB thermal copper for θJA = 54°C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Qualification | AEC-Q100 Grade 1 qualified, PPAP-capable, manufactured in IATF 16949 facilities - meets OEM requirements for safety-critical subsystems. |
| Integrated Discharge | 30Ω internal N-MOSFET discharges VOUT during shutdown - eliminates need for external bleed resistor and reduces system reset time. |
| Low-Noise Regulation | 60µVrms noise floor with no additional filtering - avoids SNR degradation in RF receiver LNA and ADC reference supplies. |
| High PSRR at Low Frequencies | 75dB rejection at 1kHz - effectively isolates sensitive analog circuits from buck converter ripple and engine EMI. |
| Ultra-Low Quiescent Current | 35µA typical IQ - enables >10-year battery life in always-on telematics and intrusion detection modules. |
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 2.7V LDO supplying clean bias to RF front-end and audio DACs. Use Value: 75dB PSRR prevents AM band interference from display backlight switching; 60µVrms noise avoids audible hiss in speaker output. |
Use Scenario: Providing regulated 2.7V to GNSS/GPS RF receivers and cellular modems. IC Role / Device Role / Timing Role: Low-noise local regulator for RF IC VCC pins, decoupled from noisy main 3.3V rail. Use Value: Enables <−160dBm sensitivity in GPS receivers by eliminating LDO-induced phase noise on local oscillator paths. |
| Cameras | Automotive POL in ADAS |
|
Use Scenario: Supplying image sensor analog and digital cores in rear-view and surround-view cameras. IC Role / Device Role / Timing Role: Dual-rail LDO delivering 2.7V to sensor analog block and 1.2V to ISP logic (via companion device). Use Value: ±1% output accuracy maintains consistent pixel response across temperature; 300mA capacity supports 5MP+ rolling shutter sensors. |
Use Scenario: Point-of-load regulation for radar SoC analog supply domains in forward collision warning systems. IC Role / Device Role / Timing Role: Secondary LDO generating ultra-clean 2.7V for PLL VCO and ADC reference buffers. Use Value: 60µVrms noise and 75dB PSRR reduce radar range ambiguity caused by supply-induced jitter on 77GHz LO signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7343Q-27FDZW-7 | No internal discharge transistor; VOUT remains floating after EN deactivation. | Suitable where output hold time is acceptable or external discharge is implemented. | Select when system does not require fast VOUT decay and cost minimization is prioritized. |
| TLD6512-2.7ES | Higher IQ (65µA), lower PSRR (65dB @1kHz), same AEC-Q100 Grade 1 rating. | Designed for LED driver bias rails; lacks optimized noise performance for RF/analog loads. | Choose only if footprint compatibility with TLD65xx family is required and 10µVrms noise margin is acceptable. |
Compared with AP7343Q-27FDZW-7, the DQ variant adds discharge capability without sacrificing PSRR or noise - making it superior for systems needing deterministic power-down behavior. Against TLD6512-2.7ES, it delivers 10dB higher ripple rejection and 25µA lower quiescent current, directly improving RF sensitivity and battery longevity.
Availability
AP7343DQ-27FDZW-7 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and wireless communication subsystems requiring stable component supply with full AEC-Q100 traceability and PPAP support.
Supply support for AP7343DQ-27FDZW-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for automotive, industrial, and consumer markets.
The AP7343Q series targets automotive power integrity challenges - delivering low-noise, high-PSRR LDOs with AEC-Q100 qualification and robust thermal design for space-constrained ADAS and infotainment ECUs.
FAQ
What is the function of the NC pins on AP7343DQ-27FDZW-7?
Pins 2 and 5 are internally unconnected. Diodes Incorporated recommends tying them to GND to maximize PCB copper area for thermal dissipation and improve EMI shielding. They carry no electrical signal or bias current and must not be left floating in production layouts.
Does AP7343DQ-27FDZW-7 require an external discharge resistor?
No. Unlike the non-DQ variant, AP7343DQ-27FDZW-7 integrates a 30Ω N-channel MOSFET that actively discharges the output capacitor when EN is pulled low. This eliminates the need for external bleed resistors and reduces system-level component count and board area.
How does the W-DFN2020-6 (SWP) Type A1 package impact thermal design?
The W-DFN2020-6 (SWP) Type A1 package achieves θJA = 54°C/W with proper PCB layout: the exposed pad (EP) must be soldered to ≥100mm² of 2oz copper connected to GND. This enables full 300mA output at +125°C ambient without derating - critical for under-dash ADAS modules.
Can AP7343DQ-27FDZW-7 operate with input voltage below 2.7V?
Yes. It supports VIN as low as 1.7V, but dropout voltage increases as VIN approaches VOUT. At 300mA load and 2.7V output, minimum functional VIN is 3.05V (2.7V + 0.35V dropout). Below that, regulation fails and VOUT drops linearly with VIN.
AP7343DQ-27FDZW-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- 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):
- -
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 60 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (1kHz)
- Control Features:
- Current Limit, Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- W-DFN2020-6 (Type A1)
AP7343DQ-27FDZW-7 FAQ
1.How can I place an order for AP7343DQ-27FDZW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7343DQ-27FDZW-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-27FDZW-7 reliable?
The price and inventory of AP7343DQ-27FDZW-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-27FDZW-7 is usually 5 days.
3.What payment methods are accepted for AP7343DQ-27FDZW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343DQ-27FDZW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7343DQ-27FDZW-7?
AP7343DQ-27FDZW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7343DQ-27FDZW-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-27FDZW-7?
For technical support, including AP7343DQ-27FDZW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343DQ-27FDZW-7 requirements.
6.How does Aetrix verify that AP7343DQ-27FDZW-7 is sourced from the original manufacturer or authorized distributors?
All AP7343DQ-27FDZW-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-27FDZW-7 meets industry standards.
7.What is the process for return or replacement of AP7343DQ-27FDZW-7?
All AP7343DQ-27FDZW-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343DQ-27FDZW-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-27FDZW-7 part is unused and in its original packaging.
Return procedure for AP7343DQ-27FDZW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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