My Inquiry
My Account
Diodes Incorporated AP7343DQ-18W5-7
- Part No.:
- AP7343DQ-18W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7343DQ-18W5-7.pdf
- Description:
- IC REG LINEAR 1.8V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:17,403
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP7343DQ-18W5-7 from Diodes Incorporated is an automotive-grade 300mA low-dropout linear regulator with fixed 1.8V output, ±1% accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). It features enable control, thermal shutdown, and short-circuit protection, and is qualified to AEC-Q100 Grade 1 for use in ADAS camera power rails and infotainment domain controllers.
For engineers reviewing the AP7343DQ-18W5-7 datasheet, AP7343DQ-18W5-7 pinout, AP7343DQ-18W5-7 application, or AP7343DQ-18W5-7 equivalent, key selection criteria include its 35µA quiescent current, 0.30V typical dropout at 300mA (for 1.8V output), SOT25 package thermal resistance (θJA = 179°C/W), and automotive-compliant change control with PPAP support.
Technical Context
The AP7343DQ-18W5-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and active discharge path via internal N-channel MOSFET (RON = 30Ω) - distinguishing it from the non-discharge AP7343Q variant. Its architecture enables fast load transient response (<100µs recovery for 1mA↔300mA steps) while maintaining stability with 1µF ceramic output capacitors.
Operating across –40°C to +125°C ambient, it delivers guaranteed 300mA output under 1.7V–5.25V input, with EN pin logic thresholds (VIL ≤ 0.5V, VIH ≥ 1.3V) compatible with 1.8V/3.3V microcontroller GPIO. The built-in discharge function actively pulls VOUT to GND during shutdown, eliminating residual voltage hold-up in safety-critical automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% (guaranteed over –40°C to +125°C; supports SoC core rail requirements) |
| Max Output Current | 300mA continuous (enables powering dual-core MCU clusters or image signal processors) |
| PSRR | 75dB at 1kHz (rejects switching noise from adjacent DC/DC converters in automotive power domains) |
| Output Noise | 60µVrms, 10Hz–100kHz (meets low-noise analog supply specs for ADCs and RF receivers) |
| Quiescent Current | 35µA typical (minimizes standby power loss in always-on vehicle networks) |
| Dropout Voltage | 0.30V typical at 300mA (allows operation from 2.1V input, critical for cold-crank battery conditions) |
| Enable Threshold | VIH ≥ 1.3V, VIL ≤ 0.5V (direct interface with 1.8V logic without level-shifting) |
| Discharge Function | Active VOUT pull-down via 30Ω internal NMOS (ensures rapid, controlled discharge per ISO 26262 ASIL-B timing constraints) |
Pinout & Package
AP7343DQ-18W5-7 uses the SOT25 (5-pin) surface-mount package with exposed pad omitted - footprint optimized for space-constrained automotive modules. Thermal performance relies on PCB copper area connected to GND under the device body.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input power pin; requires ≥0.47µF ceramic capacitor placed within 2mm for input stability |
| 2 | EN | Active-high enable; must be driven to GND or VIN - floating state causes undefined operation |
| 3 | GND | Power ground reference; connects to PCB ground plane to minimize impedance and thermal resistance |
| 4 | VOUT | Regulated 1.8V output; routed with short, wide trace to load to preserve PSRR and transient response |
| 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 qualification | Validated for –40°C to +125°C operation with full PPAP documentation support for Tier-1 automotive programs |
| Integrated active discharge | 30Ω internal NMOS discharges VOUT to GND in <1ms after EN deactivation - eliminates need for external bleed resistor |
| Ultra-low noise output | 60µVrms noise floor enables direct powering of high-resolution ADCs and RF front-ends without additional filtering |
| High PSRR at low frequencies | 75dB rejection at 1kHz suppresses ripple from buck converter switching nodes located on same PCB layer |
| Low dropout with wide input range | 0.30V dropout at 300mA allows stable 1.8V rail generation even during 2.1V battery brownout events |
| Thermal shutdown with hysteresis | +150°C trip point with +20°C hysteresis prevents thermal cycling damage during sustained overload conditions |
Applications
| Infotainment Power Supply | ADAS Camera Module |
|---|---|
|
Use Scenario: Powering display driver ICs and audio codecs in head-unit systems requiring clean 1.8V logic rails. IC Role / Device Role / Timing Role: Primary LDO delivering regulated 1.8V to digital interfaces (I²C, SPI) and low-voltage I/O banks. Use Value: 75dB PSRR prevents AM/FM radio interference from DC/DC switching noise, preserving audio fidelity. |
Use Scenario: Supplying image sensor digital cores and ISP subsystems in forward-facing ADAS cameras. IC Role / Device Role / Timing Role: Low-noise post-regulator stabilizing power to high-speed MIPI CSI-2 transceivers and pixel processing blocks. Use Value: 60µVrms noise ensures <1 LSB error in 12-bit image sensor ADC conversion under EMI stress. |
| Automotive Wireless Comms | Automotive RF Supply |
|
Use Scenario: Providing bias voltage to Bluetooth/Wi-Fi SoCs in telematics control units operating in harsh RF environments. IC Role / Device Role / Timing Role: Enable-controlled auxiliary LDO supporting low-power sleep/wake transitions with fast turn-on (<50µs). Use Value: 35µA quiescent current extends battery backup runtime during vehicle ignition-off states. |
Use Scenario: Delivering ultra-clean 1.8V supply to VCOs, PLLs, and LNA stages in GNSS and cellular modems. IC Role / Device Role / Timing Role: Noise-sensitive analog rail generator decoupled from noisy digital domains via high PSRR architecture. Use Value: Sub-100µV noise floor maintains phase noise integrity below –160dBc/Hz at 1MHz offset for precise timing recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7343Q-18W5-7 | No internal discharge path; EN pin disables output but leaves VOUT floating | Suitable for non-safety-critical loads where residual voltage is acceptable | Select only if active discharge is not required by system-level functional safety analysis |
| TLD6512-18ES | Higher 500mA rating, integrated watchdog timer, and reverse-battery protection | Targeted at body electronics with diagnostics; larger SO-8EP package | Choose when system demands fault reporting, higher current, or reverse-polarity resilience |
Compared with AP7343Q-18W5-7, the DQ variant adds mandatory discharge functionality for ASIL-B compliance, while TLD6512-18ES trades noise performance (120µVrms) for integrated diagnostics and robustness - making AP7343DQ-18W5-7 optimal for noise-sensitive, space-constrained ADAS imaging rails.
Availability
AP7343DQ-18W5-7 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, wireless telematics units, and GNSS receiver designs requiring stable component supply with full AEC-Q100 traceability.
Supply support for AP7343DQ-18W5-7 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 IATF 16949-certified manufacturing facilities.
The AP7343Q/DQ series belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for noise-sensitive power domains in ADAS, infotainment, and connectivity systems where PSRR, low noise, and functional safety compliance are mandatory.
FAQ
What is the purpose of the NC pin on AP7343DQ-18W5-7?
Pin 5 is a no-connect terminal with no internal connection. Diodes Incorporated recommends tying it to GND on the PCB to maximize copper area for thermal dissipation and improve EMI shielding. Leaving it floating has no electrical impact but forfeits thermal and noise benefits.
Does AP7343DQ-18W5-7 require an external discharge resistor?
No. Unlike non-discharge variants, AP7343DQ-18W5-7 integrates a 30Ω N-channel MOSFET that actively pulls VOUT to GND when EN is low. This eliminates the need for external bleed resistors, reduces BOM count, and ensures sub-millisecond discharge time compliant with ISO 26262 timing requirements.
Can AP7343DQ-18W5-7 operate with input voltage below 1.8V?
No. The minimum input voltage is 1.7V, but dropout voltage rises sharply below VOUT + 0.3V. At 1.8V output, operation below ~2.1V input risks regulation loss under 300mA load. For cold-crank scenarios down to 2.1V, its 0.30V typical dropout ensures stable 1.8V delivery.
How does the 75dB PSRR at 1kHz translate to real-world noise suppression?
A 75dB PSRR means input ripple at 1kHz is attenuated by a factor of ~5,600. For example, 50mVpp switching noise from a nearby 1MHz buck converter (with 1kHz harmonic content) reduces to <9µVpp on VOUT - well below the 100µVpp threshold for sensitive RF and ADC circuits.
AP7343DQ-18W5-7 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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.41V @ 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-18W5-7 FAQ
1.How can I place an order for AP7343DQ-18W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7343DQ-18W5-7 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-18W5-7 reliable?
The price and inventory of AP7343DQ-18W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7343DQ-18W5-7 is usually 5 days.
3.What payment methods are accepted for AP7343DQ-18W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343DQ-18W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7343DQ-18W5-7?
AP7343DQ-18W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7343DQ-18W5-7 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-18W5-7?
For technical support, including AP7343DQ-18W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343DQ-18W5-7 requirements.
6.How does Aetrix verify that AP7343DQ-18W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7343DQ-18W5-7 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-18W5-7 meets industry standards.
7.What is the process for return or replacement of AP7343DQ-18W5-7?
All AP7343DQ-18W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343DQ-18W5-7, 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-18W5-7 part is unused and in its original packaging.
Return procedure for AP7343DQ-18W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP7343DQ-18W5-7 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
