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Diodes Incorporated AP7347DQ-33W5-7
- Part No.:
- AP7347DQ-33W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7347DQ-33W5-7.pdf
- Description:
- LDO CMOS LOWCURR SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:12,975
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Product details
Overview
AP7347DQ-33W5-7 from Diodes Incorporated is an automotive-grade 3.3V fixed-output low-dropout regulator delivering 500mA with ±1% output accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). It features enable control, thermal shutdown, short-circuit protection, and AEC-Q100 qualification for use in ADAS power rails and infotainment subsystems.
For engineers reviewing the AP7347DQ-33W5-7 datasheet, AP7347DQ-33W5-7 pinout, AP7347DQ-33W5-7 application, or AP7347DQ-33W5-7 equivalent, this LDO supports noise-sensitive automotive loads requiring stable 3.3V supply with fast load/line transient response, ultra-low quiescent current (60µA), and wettable-flank WDFN2020-6 or SOT25 packaging.
Technical Context
The AP7347DQ-33W5-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and internal resistor network for fixed 3.3V output. Its architecture enables high PSRR (75dB @ 1kHz) and low noise via optimized internal biasing and feedback loop stability with 1µF ceramic capacitors.
It implements active discharge via an internal N-channel MOSFET (30Ω on-resistance when disabled), supports input voltages from 1.7V to 5.5V, and maintains regulation down to 270mV dropout at 500mA for 3.3V output-enabling operation from partially discharged battery rails in automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% over -40°C to +125°C ambient; ensures stable MCU core/logic rail without external feedback. |
| Max Output Current | 500mA continuous; sufficient for powering camera sensors, RF transceivers, or microcontrollers in ADAS modules. |
| PSRR | 75dB at 1kHz; suppresses ripple from switching DC/DC stages upstream of noise-sensitive analog circuits. |
| Output Noise | 60µVrms (10Hz–100kHz); minimizes phase jitter in clocked systems and SNR degradation in audio/RF signal chains. |
| Quiescent Current | 60µA typical; extends battery life in always-on automotive modules such as telematics or door controllers. |
| Dropout Voltage | 270mV at 500mA (3.3V output); allows operation from 3.57V input-critical for cold-crank scenarios where battery dips to ~6V nominal. |
| Enable Threshold | VEN(H) ≥1.25V, VEN(L) ≤0.5V; compatible with 1.8V/3.3V GPIOs for precise system-level power sequencing. |
Pinout & Package
SOT25 (Type A1) package: 5-pin surface-mount with exposed pad not present; footprint optimized for space-constrained automotive PCBs. Wettable flank variant enables automated optical solder-joint inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Power Input | Accepts 1.7V–5.5V input; requires local 1µF ceramic decoupling placed adjacent to pin to suppress supply glitches. |
| 2 (EN) | Enable Control | Active-high logic input; must be driven-not floated-to avoid unintended shutdown; ties to VIN for always-on operation. |
| 3 (GND) | Ground Reference | Primary return path for input/output current; connects directly to PCB ground plane to minimize impedance and thermal resistance. |
| 4 (VOUT) | Regulated Output | Delivers 3.3V ±1% to load; requires 1µF ceramic capacitor placed within 2mm of pin for stability and transient response. |
| 5 (NC) | No Connect | Internally unconnected; recommended to tie to GND for improved thermal dissipation and EMI shielding. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for -40°C to +125°C ambient operation; meets automotive change-control and PPAP requirements. |
| Integrated auto-discharge | 30Ω internal N-MOSFET discharges VOUT when EN = low-prevents floating outputs during power-down sequencing. |
| Low thermal resistance | θJA = 140°C/W (SOT25); enables 500mA operation without external heatsink in compact layouts. |
| Stable with 1µF ceramic COUT | Eliminates need for large tantalum or electrolytic capacitors-reducing BOM cost and board area in space-limited modules. |
| Short-circuit foldback | Limits output current to ~180mA during VOUT-to-GND fault-protecting IC and upstream supply under sustained overload. |
Applications
| Infotainment Power Supply | ADAS Camera Module |
|---|---|
Use Scenario: Powering DSPs, touch controllers, and display interfaces in head units and digital clusters. IC Role / Device Role / Timing Role: Primary 3.3V LDO for logic and interface I/O rails, decoupling noisy switching supplies. Use Value: 75dB PSRR prevents AM/FM receiver desensitization caused by DC/DC ripple; ±1% accuracy ensures reliable memory interface timing. |
Use Scenario: Supplying image sensor analog front-end and ISP core in surround-view or driver-monitoring cameras. IC Role / Device Role / Timing Role: Low-noise 3.3V source for ADC reference and PLL VCO biasing in high-resolution imaging pipelines. Use Value: 60µVrms noise avoids pixel-level fixed-pattern noise; fast load transient response (<10µs) maintains image integrity during exposure changes. |
| Automotive RF Transceiver | Wireless Connectivity Module |
Use Scenario: Biasing VCOs, LNAs, and mixers in UWB, Bluetooth LE, or cellular-V2X radio subsystems. IC Role / Device Role / Timing Role: Clean 3.3V supply for RF signal chain components sensitive to supply-induced phase noise. Use Value: Ultra-low 60µVrms noise directly improves EVM and adjacent-channel leakage ratio (ACLR) in transmit paths. |
Use Scenario: Powering Wi-Fi 6/Bluetooth SoCs in telematics control units and OTA update gateways. IC Role / Device Role / Timing Role: Always-on 3.3V rail enabling low-power wake-on-LAN and secure boot sequences. Use Value: 60µA quiescent current reduces parasitic drain during vehicle sleep mode; AEC-Q100 qualification ensures reliability over 15-year service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B332MR-G | Same 3.3V/500mA rating but no AEC-Q100 qualification; PSRR = 65dB @ 1kHz; no auto-discharge. | Restricted to non-automotive industrial or consumer use; unsuitable for PPAP-controlled production. | Select only for cost-sensitive non-automotive designs where automotive qualification is not required. |
| Rohm BD33IC0WEFJ-C | AEC-Q100 qualified; 3.3V/300mA; lower PSRR (60dB @ 1kHz); higher dropout (350mV @ 300mA). | Insufficient current for dual-core ADAS processors; marginal performance in cold-crank conditions below 3.65V input. | Use only when 300mA max load and relaxed PSRR/noise specs are acceptable in Tier-2 automotive subsystems. |
Compared with XC6210B332MR-G and BD33IC0WEFJ-C, the AP7347DQ-33W5-7 uniquely combines AEC-Q100 Grade 1, 500mA drive, 75dB PSRR, and integrated discharge in a wettable-flank 2×2mm package-making it the only drop-in solution for next-gen automotive domain controllers requiring full functional safety compliance and high-density layout.
Availability
AP7347DQ-33W5-7 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, RF transceivers, and wireless connectivity systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AP7347DQ-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, computing, and consumer markets.
The AP7347DQ belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for noise-sensitive power domains in ADAS, infotainment, and vehicle networking-emphasizing AEC-Q100 reliability, low noise, and high PSRR in miniature packages.
FAQ
What is the maximum allowable input voltage for AP7347DQ-33W5-7?
The absolute maximum input voltage is 6.0V per the datasheet's Absolute Maximum Ratings table. Operation above 5.5V violates recommended conditions and risks permanent damage. For automotive battery applications, the device supports cold-crank transients up to 6V only momentarily-continuous operation must remain within 1.7V–5.5V.
Does AP7347DQ-33W5-7 require an external pull-up on the EN pin?
No external pull-up is required. The EN pin has no internal pull-up; it must be actively driven high (≥1.25V) to enable or low (≤0.5V) to disable. Leaving it floating causes undefined behavior. If always-on operation is needed, connect EN directly to VIN-not through a resistor-to ensure robust turn-on across temperature and voltage corners.
Can AP7347DQ-33W5-7 be used with ceramic output capacitors smaller than 1µF?
No. The datasheet specifies stability with ≥1µF ceramic output capacitance. Using smaller values risks oscillation due to insufficient phase margin, especially under load transients. The 1µF minimum is validated across -40°C to +125°C and applies to X5R/X7R dielectrics with ≤10mΩ ESR-lower ESR types like C0G are not recommended.
Is the NC pin on AP7347DQ-33W5-7 electrically isolated?
Yes-the NC pin is not connected internally to any circuit node. Diodes recommends connecting it to GND on the PCB to improve thermal conduction from the die and reduce EMI coupling. This connection does not affect regulation but enhances reliability in thermally demanding automotive environments.
AP7347DQ-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):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.32V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 125 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP7347DQ-33W5-7 FAQ
1.How can I place an order for AP7347DQ-33W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7347DQ-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 AP7347DQ-33W5-7 reliable?
The price and inventory of AP7347DQ-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 AP7347DQ-33W5-7 is usually 5 days.
3.What payment methods are accepted for AP7347DQ-33W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7347DQ-33W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7347DQ-33W5-7?
AP7347DQ-33W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7347DQ-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 AP7347DQ-33W5-7?
For technical support, including AP7347DQ-33W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7347DQ-33W5-7 requirements.
6.How does Aetrix verify that AP7347DQ-33W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7347DQ-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 AP7347DQ-33W5-7 meets industry standards.
7.What is the process for return or replacement of AP7347DQ-33W5-7?
All AP7347DQ-33W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7347DQ-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 AP7347DQ-33W5-7 part is unused and in its original packaging.
Return procedure for AP7347DQ-33W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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