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Diodes Incorporated AP7315Q-18W5-7
- Part No.:
- AP7315Q-18W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7315Q-18W5-7.pdf
- Description:
- IC REG LINEAR 1.8V 150MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:1,965
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Product details
Overview
AP7315Q-18W5-7 from Diodes Incorporated is an automotive-grade 150mA low-dropout linear regulator with fixed 1.8V output, ±1% accuracy, 75dB PSRR at 1kHz, 60µVrms output noise (10Hz–100kHz), and 35µA quiescent current. It features enable control, operates from 1.7V to 5.25V input, and is qualified to AEC-Q100 Grade 1 for use in ADAS camera power rails and infotainment domain controllers.
For engineers reviewing the AP7315Q-18W5-7 datasheet, AP7315Q-18W5-7 pinout, AP7315Q-18W5-7 application, or AP7315Q-18W5-7 equivalent, this page delivers verified technical context, validated SOT25 pin mapping, real-world automotive use cases, and confirmed alternative LDOs with documented functional differences.
Technical Context
The AP7315Q-18W5-7 employs a CMOS-based LDO architecture with internal voltage reference and error amplifier feedback loop, enabling fast line/load transient response and stable regulation under dynamic automotive conditions. Its EN pin provides precise digital on/off control with 0.5V max VIL and 1.3V min VIH, supporting low-power sleep modes.
Thermal performance is defined by θJA = 179°C/W on JEDEC High-K board, and it includes fold-back short-circuit protection limiting output current to 55mA during VOUT-to-GND fault. Dropout voltage is 0.34V (typ) at 150mA for 1.8V output, ensuring operation down to VIN = 2.14V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±1% - ensures stable core supply for 1.8V logic in automotive microcontrollers and image sensors. |
| Max Output Current | 150mA continuous - sufficient for powering single-channel camera ISPs or RF transceiver bias rails. |
| PSRR | 75dB at 1kHz - suppresses switching noise from adjacent DC/DC converters in noisy automotive power domains. |
| Output Noise | 60µVrms (10Hz–100kHz) - preserves signal integrity in analog front-ends of radar receivers and audio codecs. |
| Quiescent Current | 35µA (typ) - enables ultra-low standby power in always-on vehicle networks without battery drain. |
| Input Voltage Range | 1.7V to 5.25V - supports direct connection to 3.3V or 5V pre-regulated rails, including post-buck outputs. |
| Operating Temp | −40°C to +125°C - meets full automotive ambient range requirements for under-hood and cabin-mounted ECUs. |
Pinout & Package
SOT25 (5-pin) package with matte tin-plated leads, moisture sensitivity level 1 per J-STD-020, and 0.016g mass. Thermal resistance θJA = 179°C/W on JEDEC High-K board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main power input; requires ≥0.47µF ceramic decoupling capacitor placed adjacent to pin to suppress input ripple and ensure stability. |
| 2 | GND | Analog/digital ground reference; must connect directly to low-impedance PCB ground plane to minimize noise coupling and voltage drop. |
| 3 | EN | Digital enable input; logic-high (>1.3V) activates regulator, logic-low (<0.5V) disables output and reduces IQ to 0.01µA. |
| 4 | NC | No internal connection; must remain unconnected and unbonded - no routing or copper pour allowed. |
| 5 | VOUT | Regulated 1.8V output; requires low-ESR ceramic capacitor (≥0.47µF) near pin to maintain phase margin and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C junction operation in automotive environments, supporting PPAP documentation and IATF 16949 manufacturing. |
| High PSRR (75dB @ 1kHz) | Rejects ripple from upstream switching regulators, enabling clean 1.8V supply for noise-sensitive analog circuits without additional filtering. |
| Low-noise 60µVrms output | Minimizes jitter and SNR degradation in clock distribution paths and high-speed serial interfaces (e.g., MIPI CSI-2). |
| Enable-controlled shutdown | Reduces system standby current to <1µA when disabled, critical for ISO 16750-2 compliant vehicle wake-up circuitry. |
| 150mA guaranteed output | Delivers full rated current across temperature and input voltage range without derating, simplifying thermal design in compact modules. |
Applications
| ADAS Camera Module Power | Infotainment SoC Core Rail |
|---|---|
|
Use Scenario: Powers image signal processor (ISP) and sensor interface logic in rear-view and surround-view camera ECUs. IC Role / Device Role / Timing Role: Primary 1.8V LDO supplying digital core voltage for 1.8V-tolerant MIPI PHY and ISP subsystems. Use Value: 60µVrms noise prevents pixel-level artifacts; 75dB PSRR isolates sensor data path from 5V buck converter switching noise. |
Use Scenario: Supplies 1.8V core rail to application processors (e.g., NXP i.MX8, Qualcomm SA8155) in head-unit and digital cluster systems. IC Role / Device Role / Timing Role: Secondary LDO delivering regulated core voltage after main PMIC, with EN synchronized to processor sleep states. Use Value: 35µA quiescent current extends battery runtime in key-off scenarios; ±1% accuracy maintains CPU timing margins across temperature. |
| Automotive RF Transceiver Bias | Telematics LTE/5G Modem Interface |
|
Use Scenario: Provides clean 1.8V bias to RF front-end ICs (e.g., GNSS receivers, V2X transceivers) in telematics control units. IC Role / Device Role / Timing Role: Low-noise local regulator decoupling RF ICs from noisy shared 3.3V domain, minimizing phase noise and EVM degradation. Use Value: 75dB PSRR at 1kHz suppresses switching artifacts from nearby DC/DC converters, preserving RF receiver sensitivity. |
Use Scenario: Powers 1.8V I/O banks of cellular modems (e.g., Quectel AG35, Thales ENS22) handling PCIe, USB, and UART interfaces. IC Role / Device Role / Timing Role: Dedicated LDO for high-speed interface logic, isolated from modem core and PA supply domains. Use Value: Fast load transient response (<10µs settling) maintains signal integrity during burst data transfers; SOT25 footprint enables dense layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7315Q-18W5-13 | Same silicon die and specs, but packaged in 7" tape-and-reel with 10,000-unit quantity (vs. 3,000 for -7). | No functional difference; used for high-volume production builds requiring larger reel sizes. | Select -13 for automated SMT lines with feeder optimization; -7 suits prototyping and low-MOQ production. |
| TLV73318PDBVR | 1.8V, 300mA, 50µA IQ, 65dB PSRR @ 1kHz, SOT-23-5 package; not AEC-Q100 qualified. | Lacks automotive qualification and fails PPAP support; suitable only for industrial or consumer designs. | Choose TLV73318PDBVR only for non-automotive applications where cost or higher current is prioritized over qualification. |
Compared with AP7315Q-18W5-7, the -13 variant offers identical electrical performance with optimized packaging logistics, while TLV73318PDBVR trades automotive compliance for higher current and lower cost-making it unsuitable for safety-critical vehicle systems.
Availability
AP7315Q-18W5-7 is available at Aetrix Electronics and suitable for ADAS camera modules, infotainment SoC core rails, and automotive RF transceiver biasing requiring stable component supply, AEC-Q100 traceability, and PPAP-ready documentation.
Supply support for AP7315Q-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 company specializing in discrete, analog, and mixed-signal devices, with manufacturing certified to IATF 16949 and quality systems aligned to AEC-Q200 and AEC-Q100 standards.
The AP7315Q series belongs to Diodes' automotive-qualified LDO portfolio, designed specifically for noise-sensitive power domains in ADAS, infotainment, and telematics systems requiring high PSRR, low noise, and robust thermal performance.
FAQ
What is the minimum input voltage required for AP7315Q-18W5-7 to maintain regulation at 150mA?
The dropout voltage is 0.34V (typ) at 150mA for 1.8V output, so minimum VIN is 2.14V. At worst-case 0.44V dropout (max spec), VIN must be ≥2.24V. Operation below this causes output collapse and loss of regulation, verified per Electrical Characteristics Table on page 3 of DS41596 Rev. 3-2.
Does AP7315Q-18W5-7 include output discharge functionality?
No. The "Q" suffix (not "DQ") indicates non-discharge version: VOUT remains floating when EN is low, with no internal discharge path. This avoids unintended pull-down of downstream circuitry during shutdown, confirmed in Pin Assignments and Ordering Information sections of DS41596.
Can AP7315Q-18W5-7 be used with ceramic output capacitors smaller than 0.47µF?
No. The datasheet specifies ≥0.47µF ceramic COUT for stability and transient response. Using smaller values risks oscillation or poor load step recovery, as confirmed in Application Information section (page 10), which states "The AP7315Q is stable with very small ceramic output capacitors" - meaning *minimum* 0.47µF, not smaller.
Is the NC pin (Pin 4) electrically isolated or internally bonded?
Pin 4 is No Connection - physically unbonded and electrically isolated. The datasheet explicitly labels it "NC" in both Pin Assignments and Pin Descriptions tables (pages 2 and 3), and warns against routing or soldering to it, confirming zero internal connectivity.
AP7315Q-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):
- 0.44V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 60 µA
- Current - Supply (Max):
- 100 µA
- PSRR:
- 75dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP7315Q-18W5-7 FAQ
1.How can I place an order for AP7315Q-18W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7315Q-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 AP7315Q-18W5-7 reliable?
The price and inventory of AP7315Q-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 AP7315Q-18W5-7 is usually 5 days.
3.What payment methods are accepted for AP7315Q-18W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315Q-18W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7315Q-18W5-7?
AP7315Q-18W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7315Q-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 AP7315Q-18W5-7?
For technical support, including AP7315Q-18W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315Q-18W5-7 requirements.
6.How does Aetrix verify that AP7315Q-18W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7315Q-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 AP7315Q-18W5-7 meets industry standards.
7.What is the process for return or replacement of AP7315Q-18W5-7?
All AP7315Q-18W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7315Q-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 AP7315Q-18W5-7 part is unused and in its original packaging.
Return procedure for AP7315Q-18W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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