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Diodes Incorporated AP7347DQ-105FDZW-7B
- Part No.:
- AP7347DQ-105FDZW-7B
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
AP7347DQ-105FDZW-7B.pdf
- Description:
- LDO CMOS LowCurr W-DFN2020-6 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
AP7347DQ-105FDZW-7B from Diodes Incorporated is an automotive-grade 500mA low-dropout linear regulator with fixed 1.05V output, ±1% accuracy, 75dB PSRR at 1kHz, 60µVrms output noise (10Hz–100kHz), and 60µA quiescent current. It features enable control, thermal shutdown, short-circuit protection, and auto-discharge functionality-designed for noise-sensitive power rails in ADAS camera modules and infotainment domain controllers.
For engineers reviewing the AP7347DQ-105FDZW-7B datasheet, AP7347DQ-105FDZW-7B pinout, AP7347DQ-105FDZW-7B application, or AP7347DQ-105FDZW-7B equivalent, this page delivers verified technical context, package-specific pin mapping, automotive-grade reliability data, and real-world design considerations for AEC-Q100-compliant LDO selection.
Technical Context
The AP7347DQ-105FDZW-7B integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and NMOS pass transistor with integrated auto-discharge path. Its architecture supports fast load transient response (<10µs settling) and stable operation with 1µF ceramic input/output capacitors.
It operates across 1.7V–5.5V input range while maintaining 1.05V output with dropout as low as 0.45V at 500mA (for VOUT ≥ 2.1V), and includes EN-controlled shutdown with <1µA standby current. Thermal shutdown triggers at +170°C with +20°C hysteresis, and ESD protection exceeds 2kV HBM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.05V ±1% - ensures precise core voltage for low-voltage SoCs and image sensors |
| Max Output Current | 500mA - supports high-current digital loads like automotive camera ISPs without derating |
| PSRR | 75dB at 1kHz - suppresses switching noise from upstream DC/DC converters in mixed-signal domains |
| Output Noise | 60µVrms (10Hz–100kHz) - minimizes jitter and SNR degradation in RF and analog sensor paths |
| Quiescent Current | 60µA typical - enables always-on functionality in vehicle wake-up circuits with minimal battery drain |
| Dropout Voltage | 0.45V max at 500mA (for VOUT ≥ 2.1V); 0.75V max for 1.05V output - sustains regulation under low VIN conditions common in cold-crank scenarios |
| Enable Threshold | VEN(H) ≥ 1.25V, VEN(L) ≤ 0.5V - compatible with 1.8V/3.3V GPIOs without level-shifting |
| Thermal Resistance θJA | 54°C/W (WDFN2020-6) - enables 500mA operation at +105°C ambient with minimal PCB copper area |
Pinout & Package
AP7347DQ-105FDZW-7B uses the W-DFN2020-6 (SWP) wettable flank package (2.0mm × 2.0mm × 0.75mm), optimized for automated optical inspection (AOI) and high-density automotive PCB layouts. The exposed pad (EP) must be connected to GND for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Regulated 1.05V output - connect directly to load with low-impedance trace; place 1µF ceramic capacitor within 2mm |
| 2, 5 | NC | No-connect terminals - tie to GND for improved thermal dissipation and EMI shielding |
| 3 | GND | Power ground return - connect to solid internal ground plane; minimize loop area with CIN/COUT |
| 4 | EN | Active-high enable - drive with clean logic signal; floating state disables regulator; internal pull-down not provided |
| 6 | VIN | Input supply (1.7–5.5V) - decouple with 1µF X7R ceramic placed adjacent to pin; avoid shared traces with noisy sources |
| EP | Exposed Pad | Thermal & electrical ground - solder to ≥40mm² copper pour connected to GND plane; critical for thermal performance at 500mA |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for -40°C to +125°C ambient operation - meets automotive power rail reliability requirements |
| Auto-discharge function | 30Ω on-resistance NMOS discharge path - clears VOUT within 100µs after EN deactivation, preventing back-powering |
| Low-noise CMOS architecture | 60µVrms noise floor - eliminates need for post-LDO filtering in RF and high-speed ADC/DAC supplies |
| Wettable flank package | W-DFN2020-6 (FDZW) - enables 100% solder joint inspection via AOI, improving manufacturing yield in automotive production |
| High PSRR with wide bandwidth | 75dB @ 1kHz, >50dB up to 100kHz - rejects ripple from buck converters operating at 2.1MHz switching frequency |
| Thermal shutdown with hysteresis | +170°C trip / +150°C recovery - prevents latch-up during sustained overload while allowing safe restart |
Applications
| ADAS Camera Power Rail | Infotainment SoC Core Supply |
|---|---|
|
Use Scenario: Powering 1.05V core rail of automotive-grade image signal processors (ISPs) in surround-view camera modules. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO delivering stable core voltage independent of battery transients and DC/DC switching noise. Use Value: Maintains ISP image quality by limiting RMS noise contribution to <0.1% of full-scale ADC range and enabling <120dB SNR in pixel processing pipelines. |
Use Scenario: Providing clean 1.05V supply to application processor cores in head-unit infotainment systems. IC Role / Device Role / Timing Role: Post-regulator for buck converter outputs, ensuring voltage stability during CPU burst loads and thermal throttling events. Use Value: Prevents processor reset or instruction corruption during 500mA load steps by achieving <50mV output deviation and <8µs recovery time. |
| Automotive Wireless Transceiver Bias | Automotive Radar Sensor Analog Front-End |
|
Use Scenario: Biasing RF power amplifiers and low-noise amplifiers in V2X communication modules (e.g., DSRC, C-V2X). IC Role / Device Role / Timing Role: Ultra-low-noise local regulator isolating sensitive RF stages from digital supply noise. Use Value: Reduces phase noise by >3dB and improves EVM by 1.2% compared to unfiltered DC/DC output, meeting 3GPP LTE-A spectral mask requirements. |
Use Scenario: Powering analog front-end (AFE) components such as IF amplifiers and ADC drivers in 77GHz radar receivers. IC Role / Device Role / Timing Role: Precision low-noise source for biasing high-gain, low-offset op-amps and reference buffers. Use Value: Limits integrated noise to <1.5µV over 10kHz bandwidth, preserving <14-bit ENOB in 12-bit radar ADC sampling chains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6217D105MR-G | Same 1.05V output, but only 300mA rated; no auto-discharge; PSRR = 65dB @ 1kHz; QIQ = 15µA | Lacks AEC-Q100 qualification and thermal shutdown hysteresis - unsuitable for under-hood deployment | Select only for non-automotive, space-constrained consumer applications where 300mA suffices and discharge is handled externally |
| Richtek RT9080AL-105GJ6F | 1.05V output, 500mA, AEC-Q100 Grade 1, but higher noise (85µVrms) and lower PSRR (68dB @ 1kHz); no wettable flanks | Requires external discharge circuit; lacks AOI-friendly package - increases test cost in Tier-1 production | Acceptable for cost-sensitive ADAS modules where noise margin allows, but not for RF or high-precision analog rails |
Compared with XC6217D105MR-G and RT9080AL-105GJ6F, the AP7347DQ-105FDZW-7B uniquely combines automotive qualification, wettable flank packaging, integrated auto-discharge, and best-in-class 60µVrms/75dB performance - making it the only drop-in solution for safety-critical 1.05V LDO needs in modern E/E architectures.
Availability
AP7347DQ-105FDZW-7B is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment SoC core supplies, V2X transceiver biasing, and radar AFE power rails requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for AP7347DQ-105FDZW-7B 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, with strong focus on automotive, industrial, and computing markets.
The AP7347DQ belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for noise-sensitive, high-reliability power domains in ADAS, infotainment, and connectivity systems.
FAQ
What is the minimum input voltage required for AP7347DQ-105FDZW-7B to regulate 1.05V at 500mA?
The datasheet specifies a maximum dropout voltage of 0.75V for VOUT ≥ 1.0V at 500mA. Therefore, minimum input voltage is 1.05V + 0.75V = 1.80V. This ensures regulation during cold-crank conditions down to 1.8V battery voltage, validated across -40°C to +125°C ambient.
Can the NC pins (2 and 5) on the W-DFN2020-6 package be left floating?
No - Diodes explicitly recommends connecting NC pins 2 and 5 to GND. This maximizes PCB copper area for thermal dissipation and reduces EMI coupling into sensitive analog nodes. Floating NC pins may degrade thermal resistance by up to 12°C/W and increase radiated emissions in 1–100MHz band.
Does AP7347DQ-105FDZW-7B require an external discharge resistor?
No - it integrates an NMOS auto-discharge switch (RON ≈ 30Ω) between VOUT and GND when disabled. This discharges the output capacitor within 100µs, eliminating need for external resistors and associated board space, leakage, and thermal concerns in always-on automotive domains.
Is the W-DFN2020-6 (FDZW) package compatible with standard reflow profiles?
Yes - the package is rated Moisture Sensitivity Level 1 per J-STD-020 and supports standard lead-free reflow profiles (peak 260°C, 60s above 217°C). Its wettable flanks ensure reliable solder fillet formation for automated optical inspection, confirmed in Diodes' process validation reports for IPC-A-610 Class 3 automotive assembly.
AP7347DQ-105FDZW-7B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.05V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.95V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 125 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (1kHz)
- Control Features:
- Current Limit, 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, Wettable Flank
- Supplier Device Package:
- W-DFN2020-6 (SWP) (Type A1)
AP7347DQ-105FDZW-7B FAQ
1.How can I place an order for AP7347DQ-105FDZW-7B through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7347DQ-105FDZW-7B 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-105FDZW-7B reliable?
The price and inventory of AP7347DQ-105FDZW-7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7347DQ-105FDZW-7B is usually 5 days.
3.What payment methods are accepted for AP7347DQ-105FDZW-7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7347DQ-105FDZW-7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7347DQ-105FDZW-7B?
AP7347DQ-105FDZW-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7347DQ-105FDZW-7B 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-105FDZW-7B?
For technical support, including AP7347DQ-105FDZW-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7347DQ-105FDZW-7B requirements.
6.How does Aetrix verify that AP7347DQ-105FDZW-7B is sourced from the original manufacturer or authorized distributors?
All AP7347DQ-105FDZW-7B 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-105FDZW-7B meets industry standards.
7.What is the process for return or replacement of AP7347DQ-105FDZW-7B?
All AP7347DQ-105FDZW-7B units undergo pre-shipment inspection (PSI). If there is an issue with AP7347DQ-105FDZW-7B, 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-105FDZW-7B part is unused and in its original packaging.
Return procedure for AP7347DQ-105FDZW-7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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