My Inquiry
My Account
Diodes Incorporated AP7347DQ-18FDZW-7B
- Part No.:
- AP7347DQ-18FDZW-7B
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
AP7347DQ-18FDZW-7B.pdf
- Description:
- LDO CMOS LowCurr W-DFN2020-6 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:2,915
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP7347DQ-18FDZW-7B from Diodes Incorporated is an automotive-grade 1.8V fixed-output, 500mA low-dropout linear regulator with ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µVrms output noise (10Hz–100kHz). Built on CMOS process, it integrates 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-18FDZW-7B datasheet, AP7347DQ-18FDZW-7B pinout, AP7347DQ-18FDZW-7B application, or AP7347DQ-18FDZW-7B equivalent, key selection criteria include its AEC-Q100 qualification, WDFN2020-6 wettable flank package for solder joint inspection, 60µA quiescent current in active mode, and guaranteed 500mA output across –40°C to +125°C ambient.
Technical Context
The AP7347DQ-18FDZW-7B employs a CMOS-based error amplifier architecture with internal voltage reference and current-limit circuitry. Its enable input supports direct logic-level control (EN high = active, EN low = shutdown), and the integrated N-channel auto-discharge transistor (30Ω typical) actively pulls VOUT to GND when disabled-critical for fast power-down sequencing in automotive systems.
It delivers stable regulation over 1.7V–5.5V input range with dropout as low as 0.45V at 500mA for 1.8V output. Thermal shutdown triggers at +170°C with +20°C hysteresis, and the device maintains ±30ppm/°C output voltage temperature coefficient under load-enabling precise biasing of RF ICs and image sensors without external trimming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% - ensures stable core supply for 1.8V I/O domains in automotive MCUs and SerDes interfaces. |
| Max Output Current | 500mA - sufficient to power dual-lane MIPI CSI-2 camera sensors or low-power RF transceivers without derating. |
| PSRR | 75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters feeding infotainment SoCs. |
| Output Noise | 60µVrms (10Hz–100kHz) - preserves SNR in analog front-ends of radar receivers and audio codecs. |
| Quiescent Current | 60µA typical - enables always-on monitoring circuits to meet ISO 26262 ASIL-B standby power budgets. |
| Dropout Voltage | 0.45V max at 500mA - allows operation from 2.25V battery rail during cold-crank conditions down to 1.8V output. |
| Enable Threshold | VEN(H) ≥ 1.25V, VEN(L) ≤ 0.5V - compatible with 1.8V/3.3V GPIO without level-shifting. |
| Thermal Resistance θJA | 54°C/W (WDFN2020-6) - enables 500mA continuous operation at +105°C ambient with minimal PCB copper area. |
Pinout & Package
AP7347DQ-18FDZW-7B uses the W-DFN2020-6 (SWP) wettable flank package (2.0mm × 2.0mm, 0.65mm pitch), optimized for automated optical inspection (AOI) of solder joints. The exposed pad (EP) must be connected to GND via thermal vias for optimal junction-to-ambient heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Regulated 1.8V output; requires 1µF ceramic capacitor placed <1mm from pin for stability and transient response. |
| 2,5 | NC | No-connect terminals; recommended to tie to GND for enhanced thermal conduction and EMI shielding. |
| 3 | GND | Power ground return; must connect directly to solid ground plane beneath EP to minimize impedance. |
| 4 | EN | Active-high enable; driven by MCU GPIO or system PMIC; floating state prohibited per datasheet. |
| 6 | VIN | Input supply (1.7–5.5V); requires 1µF decoupling capacitor placed adjacent to pin to suppress input ripple. |
| EP | Exposed Pad | Thermal interface only; not electrically functional-must be soldered to GND plane with ≥4 thermal vias (0.3mm diameter). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for –40°C to +125°C ambient operation with PPAP documentation support-meets automotive electronics reliability requirements. |
| Auto-discharge function | 30Ω N-channel discharge path activates on EN low, discharging VOUT to GND in <100µs-prevents back-powering of upstream circuits. |
| Low-noise CMOS architecture | 60µVrms noise floor enables direct powering of PLL VCOs and ADC reference buffers without additional filtering. |
| Wettable flank package | W-DFN2020-6 SWP geometry enables 100% solder joint inspection via AOI-reducing field failure risk in safety-critical assemblies. |
| Thermal shutdown with hysteresis | +170°C trip with +20°C hysteresis prevents thermal cycling damage during sustained overload or poor heatsinking. |
Applications
| ADAS Camera Power Supply | Infotainment SoC Core Rail |
|---|---|
Use Scenario: Powering 1.8V MIPI CSI-2 image sensor and ISP in forward-facing driver assistance camera. IC Role / Device Role / Timing Role: Primary LDO delivering clean, regulated 1.8V to sensor digital I/O and ISP core logic. Use Value: 75dB PSRR rejects noise from nearby buck converters; 60µA quiescent current extends parking-mode battery life. |
Use Scenario: Providing stable 1.8V supply to application processor I/O banks in head-unit infotainment system. IC Role / Device Role / Timing Role: Secondary LDO post-regulator ensuring voltage integrity during dynamic CPU load transitions. Use Value: 0.45V dropout enables operation during battery brownout; ±1% accuracy maintains signal integrity across temperature. |
| Automotive RF Transceiver Bias | Domain Controller Low-Power Subsystem |
Use Scenario: Biasing 1.8V LNA and mixer stages in UWB or Bluetooth LE wireless communication module. IC Role / Device Role / Timing Role: Ultra-low-noise local regulator isolating RF analog circuitry from noisy digital domains. Use Value: 60µVrms noise floor preserves receiver sensitivity; AEC-Q100 qualification ensures operation in cabin RF environments. |
Use Scenario: Powering always-on CAN FD controller, watchdog timer, and secure boot ROM in zonal domain controller. IC Role / Device Role / Timing Role: Always-on LDO maintaining critical subsystems during vehicle sleep states. Use Value: 60µA IQ enables >10-year battery-backed operation; auto-discharge prevents leakage into powered-down peripherals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6217D182MR-G | Same 1.8V/500mA output, but no auto-discharge; PSRR 65dB @1kHz; SOT-25 only (no wettable flank option). | Lacks active discharge-requires external circuitry for fast VOUT decay; unsuitable for strict ASIL-B power sequencing. | Select only if wettable flank inspection is unnecessary and discharge timing is non-critical. |
| Rohm BD3572EFJ-ME2 | AEC-Q100 Grade 1, 1.8V/500mA, but higher IQ (120µA); no wettable flank; thermal shutdown at +150°C (no hysteresis). | Higher quiescent current reduces battery lifetime in always-on nodes; lower thermal trip point increases false shutdown risk. | Prefer only if cost is primary constraint and thermal margin exceeds +20°C above worst-case junction temp. |
Compared with XC6217D182MR-G and BD3572EFJ-ME2, AP7347DQ-18FDZW-7B uniquely combines wettable flank packaging for automotive process control, integrated auto-discharge for safe power-down, and lowest noise (60µVrms)-making it optimal for ADAS and domain controller applications demanding both reliability and signal integrity.
Availability
AP7347DQ-18FDZW-7B is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment domain controllers, and wireless communication subsystems requiring stable component supply with full traceability and AEC-Q100 compliance.
Supply support for AP7347DQ-18FDZW-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 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 AP7347DQ series belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for noise-sensitive, safety-critical power rails in ADAS, infotainment, and vehicle networking systems.
FAQ
What is the maximum allowable input voltage for AP7347DQ-18FDZW-7B?
The absolute maximum input voltage is 6.0V, but the recommended operating range is 1.7V to 5.5V. Exceeding 5.5V risks permanent damage even for brief transients. For automotive battery applications, this range accommodates cold-crank (down to ~6.0V nominal) and load-dump (up to 40V) scenarios only when paired with appropriate front-end protection-this LDO itself must never see >6.0V.
Does AP7347DQ-18FDZW-7B require an external discharge resistor?
No. The device integrates an N-channel MOSFET with 30Ω typical on-resistance between VOUT and GND that activates automatically when EN is pulled low. This eliminates need for external discharge components, reduces BOM count, and ensures consistent discharge timing (<100µs) across temperature and process variation-critical for automotive functional safety compliance.
How does the W-DFN2020-6 (SWP) package improve manufacturing yield in automotive assembly?
The wettable flank geometry exposes vertical sidewalls of all six terminals, enabling automated optical inspection (AOI) to verify solder fillet formation and voiding-unachievable with standard DFN packages. This directly improves first-pass yield in high-reliability automotive SMT lines and reduces latent defects linked to insufficient solder joint integrity in vibration-prone environments.
Can AP7347DQ-18FDZW-7B operate with ceramic output capacitors smaller than 1µF?
Yes-stability is guaranteed with ≥0.47µF X5R/X7R ceramic capacitors (low ESR <10mΩ). However, the datasheet specifies 1µF as the minimum for optimal transient response and PSRR performance across temperature. Using <1µF may degrade load-step recovery time and increase output voltage deviation during rapid current changes-verified in Figure 19 (Load Transient Response) of DS42799 Rev. 5-2.
AP7347DQ-18FDZW-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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.55V @ 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-18FDZW-7B FAQ
1.How can I place an order for AP7347DQ-18FDZW-7B through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7347DQ-18FDZW-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-18FDZW-7B reliable?
The price and inventory of AP7347DQ-18FDZW-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-18FDZW-7B is usually 5 days.
3.What payment methods are accepted for AP7347DQ-18FDZW-7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7347DQ-18FDZW-7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7347DQ-18FDZW-7B?
AP7347DQ-18FDZW-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7347DQ-18FDZW-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-18FDZW-7B?
For technical support, including AP7347DQ-18FDZW-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7347DQ-18FDZW-7B requirements.
6.How does Aetrix verify that AP7347DQ-18FDZW-7B is sourced from the original manufacturer or authorized distributors?
All AP7347DQ-18FDZW-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-18FDZW-7B meets industry standards.
7.What is the process for return or replacement of AP7347DQ-18FDZW-7B?
All AP7347DQ-18FDZW-7B units undergo pre-shipment inspection (PSI). If there is an issue with AP7347DQ-18FDZW-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-18FDZW-7B part is unused and in its original packaging.
Return procedure for AP7347DQ-18FDZW-7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP7347DQ-18FDZW-7B 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.…
