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Diodes Incorporated AP7343DQ-12W5-7
- Part No.:
- AP7343DQ-12W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7343DQ-12W5-7.pdf
- Description:
- IC REG LINEAR 1.2V 300MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,041
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Product details
Overview
AP7343DQ-12W5-7 from Diodes Incorporated is an automotive-grade 300mA low-dropout regulator with fixed 1.2V 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 AP7343DQ-12W5-7 datasheet, AP7343DQ-12W5-7 pinout, AP7343DQ-12W5-7 application, or AP7343DQ-12W5-7 equivalent, key selection criteria include AEC-Q100 Grade 1 qualification, SOT25 package thermal performance (θJA = 179°C/W), enable-controlled shutdown (ISTANDBY = 0.01µA), and guaranteed 300mA output across –40°C to +125°C ambient.
Technical Context
The AP7343DQ-12W5-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and active discharge path (enabled by DQ suffix) for rapid VOUT ramp-down during disable. Its architecture supports fast load transient response (<100µs recovery for 1mA↔300mA steps with 4.7µF COUT) and stable operation with 1µF ceramic output capacitors.
It operates over 1.7V–5.25V input range and delivers 1.2V output with dropout as low as 0.46V at 300mA (typical), while maintaining 75dB ripple rejection at 1kHz and thermal shutdown at +150°C with +20°C hysteresis-critical for under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2V ±1% at +25°C; ensures stable core logic supply for automotive microcontrollers and sensors. |
| Max Output Current | 300mA guaranteed; sufficient for powering single-core MCUs, camera ISPs, or RF transceivers in compact modules. |
| PSRR | 75dB at 1kHz; suppresses switching noise from upstream DC/DC converters feeding infotainment or ADAS subsystems. |
| Output Noise | 60µVrms (10Hz–100kHz); preserves signal integrity in analog front-ends of radar receivers and audio codecs. |
| Quiescent Current | 35µA typical; enables always-on functionality in vehicle wake-up circuits without excessive battery drain. |
| Enable Threshold | VEN(H) ≥ 1.3V, VEN(L) ≤ 0.5V; compatible with 1.8V/3.3V GPIOs for precise system-level power sequencing. |
| Thermal Shutdown | +150°C activation with +20°C hysteresis; prevents latch-up during sustained high-power operation in sealed enclosures. |
Pinout & Package
AP7343DQ-12W5-7 is packaged in SOT25 (5-pin, 2.9mm × 2.8mm × 1.3mm), optimized for space-constrained automotive PCBs with exposed pad thermal management capability.
| 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 minimize supply impedance. |
| 2 (EN) | Enable Control | Active-high logic input; must be driven to GND or VIN-floating state causes undefined regulator behavior. |
| 3 (GND) | Ground Reference | Primary return path for input/output current; connects to PCB ground plane to reduce noise coupling and thermal resistance. |
| 4 (NC) | No Connect | Internally unconnected; recommended to tie to GND for enhanced thermal dissipation via PCB copper area. |
| 5 (VOUT) | Regulated Output | Delivers 1.2V ±1% at up to 300mA; requires 1µF ceramic output capacitor placed within 2mm of pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 Qualified | Validated for operation from –40°C to +125°C ambient, supporting PPAP documentation for Tier-1 automotive programs. |
| Integrated Discharge Path | Active pull-down on VOUT during EN=low reduces residual voltage to <100mV within 200µs-prevents latch-up in downstream logic. |
| Low-Noise Regulation | 60µVrms noise floor enables direct powering of PLLs, ADC references, and RF synthesizers without additional filtering. |
| High PSRR at Low Frequencies | 75dB rejection at 1kHz mitigates ripple from buck converter switching frequencies and their harmonics in multi-rail systems. |
| Ultra-Low Standby Current | 0.01µA shutdown current extends battery life in always-monitoring applications such as parking assist or telematics wake-on-LIN. |
Applications
| Infotainment Power Supplies | Automotive RF Supplies |
|---|---|
Use Scenario: Powering SoC cores and DDR memory in head-unit infotainment systems. IC Role / Device Role / Timing Role: Primary LDO delivering clean 1.2V rail to processor cores requiring tight voltage tolerance and low noise. Use Value: ±1% output accuracy and 75dB PSRR prevent timing violations and bit errors caused by supply-induced jitter in high-speed interfaces. |
Use Scenario: Biasing low-noise amplifiers and mixers in cellular/V2X communication modules. IC Role / Device Role / Timing Role: Noise-suppressing post-regulator for RF signal chains operating near sensitive receive bands. Use Value: 60µVrms output noise avoids degradation of receiver sensitivity (NF) and adjacent-channel rejection ratio (ACRR). |
| Cameras | Automotive POL in ADAS |
Use Scenario: Supplying image signal processors (ISPs) and CIS sensors in surround-view camera ECUs. IC Role / Device Role / Timing Role: Local point-of-load regulator providing stable 1.2V to ISP digital cores and analog bias blocks. Use Value: Fast load transient response (<100µs) maintains voltage regulation during burst-mode sensor readout, preventing frame corruption. |
Use Scenario: Powering vision processor SoCs and radar MMICs in forward-collision warning and lane-departure systems. IC Role / Device Role / Timing Role: Automotive-compliant POL delivering 1.2V to safety-critical ASIL-B logic domains. Use Value: AEC-Q100 qualification and thermal shutdown ensure functional safety compliance without external supervision circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7343Q-12W5-7 | No internal discharge path; VOUT floats after disable; higher standby leakage (1.0µA max vs. 0.01µA). | Suitable where residual VOUT decay is non-critical (e.g., non-safety-critical MCU peripherals). | Select when discharge function is unnecessary and cost minimization is prioritized. |
| TLD1120FV-ES | Higher IOUT (500mA), wider VIN (3.5–40V), but lower PSRR (60dB @ 1kHz) and higher noise (120µVrms). | Better suited for 12V-bus-derived rails; less optimal for noise-sensitive low-voltage digital loads. | Choose for high-input-voltage automotive systems needing higher current, accepting trade-offs in noise and PSRR. |
Compared with AP7343Q-12W5-7, the AP7343DQ-12W5-7 adds critical discharge functionality for safety-critical sequencing, while TLD1120FV-ES trades noise performance for wide-input capability-making AP7343DQ-12W5-7 optimal for low-noise, 1.2V POL in modern ADAS camera modules.
Availability
AP7343DQ-12W5-7 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera power supplies, and wireless communications modules requiring stable component supply with full AEC-Q100 traceability and PPAP support.
Supply support for AP7343DQ-12W5-7 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 ICs for automotive, industrial, and consumer markets, with manufacturing certified to IATF 16949.
The AP7343Q/DQ series targets automotive power management, delivering high-PSRR, low-noise LDOs qualified to AEC-Q100 Grade 1 for use in demanding under-hood and cabin applications.
FAQ
What is the purpose of the NC pin on AP7343DQ-12W5-7?
The NC pin (Pin 4) is not connected internally. Diodes Incorporated recommends connecting it to GND on the PCB to maximize copper area for thermal dissipation-this improves θJA performance without affecting electrical function. It must never be left floating or used as a signal path.
Does AP7343DQ-12W5-7 require an external discharge resistor?
No. The "DQ" suffix indicates integrated active discharge circuitry. When EN is pulled low, an internal NMOS pulls VOUT to GND, discharging output capacitance to <100mV within 200µs-eliminating need for external resistors and reducing BOM count and board space.
How does the SOT25 package affect thermal performance in continuous 300mA operation?
In SOT25, AP7343DQ-12W5-7 has θJA = 179°C/W on JEDEC High-K board. At 300mA and 1.2V output with 3.3V input, power dissipation is ~630mW, resulting in ~113°C junction rise above ambient-well within the +150°C thermal shutdown threshold when ambient remains ≤37°C, confirming suitability for moderate-power automotive zones.
Can AP7343DQ-12W5-7 operate with only 1µF input capacitance?
Yes. The datasheet specifies a minimum 0.47µF ceramic input capacitor; 1µF meets and exceeds this requirement. Placement within 2mm of VIN and GND pins is critical to maintain stability during load transients and suppress high-frequency noise from upstream converters.
AP7343DQ-12W5-7 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):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.72V @ 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-12W5-7 FAQ
1.How can I place an order for AP7343DQ-12W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7343DQ-12W5-7 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-12W5-7 reliable?
The price and inventory of AP7343DQ-12W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7343DQ-12W5-7 is usually 5 days.
3.What payment methods are accepted for AP7343DQ-12W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7343DQ-12W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7343DQ-12W5-7?
AP7343DQ-12W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7343DQ-12W5-7 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-12W5-7?
For technical support, including AP7343DQ-12W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7343DQ-12W5-7 requirements.
6.How does Aetrix verify that AP7343DQ-12W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7343DQ-12W5-7 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-12W5-7 meets industry standards.
7.What is the process for return or replacement of AP7343DQ-12W5-7?
All AP7343DQ-12W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7343DQ-12W5-7, 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-12W5-7 part is unused and in its original packaging.
Return procedure for AP7343DQ-12W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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