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Diodes Incorporated AP7315DQ-33W5-7
- Part No.:
- AP7315DQ-33W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7315DQ-33W5-7.pdf
- Description:
- IC REG LINEAR 3.3V 150MA SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:6,072
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Product details
Overview
AP7315DQ-33W5-7 from Diodes Incorporated is an automotive-grade 150mA low-dropout linear regulator with fixed 3.3V output, enable control, and integrated output discharge function. It delivers ±1% output voltage accuracy, 75dB PSRR at 1kHz, 60µVrms output noise (10Hz–100kHz), and ultra-low 35µA quiescent current. Designed for noise-sensitive automotive power rails including ADAS camera supplies and infotainment RF modules.
For engineers reviewing the AP7315DQ-33W5-7 datasheet, AP7315DQ-33W5-7 pinout, AP7315DQ-33W5-7 application, or AP7315DQ-33W5-7 equivalent, key selection criteria include AEC-Q100 Grade 1 qualification, SOT25 package thermal performance (θJA = 179°C/W), discharge-enabled fast VOUT decay during shutdown, and guaranteed 150mA load capability across –40°C to +125°C ambient.
Technical Context
The AP7315DQ-33W5-7 implements a CMOS-based LDO architecture with internal N-channel pass transistor and precision bandgap reference. Its enable input (EN) controls regulator state with defined logic thresholds (VIL ≤ 0.5V, VIH ≥ 1.3V), and the integrated 30Ω auto-discharge path actively pulls VOUT to GND when disabled-critical for system-level power sequencing in automotive ECUs.
It operates across 1.7V–5.25V input range while maintaining stable 3.3V output under 150mA load, with dropout voltage as low as 0.21V (typ.) at full load. Thermal protection and fold-back short-circuit current limiting (55mA typ.) ensure robustness in transient fault conditions without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% - ensures stable supply for 3.3V microcontrollers and sensors without external feedback. |
| Max Output Current | 150mA - supports moderate-power automotive subsystems like camera image signal processors. |
| PSRR | 75dB at 1kHz - suppresses switching noise from upstream DC/DC converters in mixed-signal domains. |
| Output Noise | 60µVrms (10Hz–100kHz) - preserves signal integrity in RF and analog sensor front-ends. |
| Quiescent Current | 35µA (typ.) - enables always-on functionality in low-power vehicle wake-up circuits. |
| Dropout Voltage | 0.21V (typ.) at 150mA - allows operation from weak or aging 3.6V battery rails down to ~3.51V. |
| Operating Temp | –40°C to +125°C - meets automotive under-hood and cabin temperature requirements per AEC-Q100 Grade 1. |
Pinout & Package
SOT25 (5-pin) package with 0.95mm pitch, 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 | Power Input | Accepts 1.7V–5.25V unregulated input; requires ≥0.47µF ceramic decoupling capacitor placed adjacent to pin. |
| 2 GND | Ground Reference | Primary return path for input/output current; must connect directly to low-impedance ground plane to minimize noise coupling. |
| 3 EN | Enable Control | Active-high digital input; drives regulator ON/OFF with defined thresholds (0.5V max low, 1.3V min high); must not float. |
| 4 NC | No Connection | Internally unconnected; PCB pad may be omitted or left floating-no electrical function or thermal benefit. |
| 5 VOUT | Regulated Output | Delivers 3.3V ±1% to load; includes integrated 30Ω discharge FET to rapidly drain output capacitance when EN = low. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 Qualified | Validated for automotive use from –40°C to +125°C junction temperature in IATF 16949-certified facilities. |
| Integrated Output Discharge | 30Ω internal FET actively discharges VOUT during shutdown-eliminates need for external bleed resistor in safety-critical sequencing. |
| High PSRR & Low Noise | 75dB ripple rejection at 1kHz and 60µVrms broadband noise enable clean power for RF transceivers and ADCs. |
| Ultra-Low Quiescent Current | 35µA typical IQ allows >1-year battery life in always-on vehicle monitoring nodes powered by coin cells or backup batteries. |
| Robust Short-Circuit Protection | Fold-back current limit clamps output to ~55mA during VOUT-to-GND faults-prevents thermal runaway without latch-off. |
Applications
| Infotainment Power Supplies | Automotive RF Supply |
|---|---|
Use Scenario: Powering audio DSPs, touch controllers, and display drivers in head-unit systems. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying noise-sensitive digital logic and interface circuitry. Use Value: ±1% output accuracy ensures reliable I²C/SPI timing margins; 60µVrms noise prevents audible artifacts in Class D amplifier inputs. | Use Scenario: Providing clean bias to LTE/V2X transceiver ICs and GNSS front-ends. IC Role / Device Role / Timing Role: Dedicated low-noise post-regulator for RF signal chain power domains. Use Value: 75dB PSRR suppresses switching noise from buck converters feeding the same PCB; discharge function prevents RF leakage during sleep mode. |
| Cameras | Automotive POL in ADAS |
Use Scenario: Powering CMOS image sensors and ISP processors in surround-view and driver-monitoring cameras. IC Role / Device Role / Timing Role: Local point-of-load regulator delivering stable 3.3V to sensor analog blocks and digital interfaces. Use Value: Fast load-transient response maintains VOUT within ±2% during pixel readout bursts; AEC-Q100 qualification ensures reliability in vibration-prone mounting locations. | Use Scenario: Supplying vision processor SoCs and radar MMIC bias rails in forward collision warning and lane-departure systems. IC Role / Device Role / Timing Role: Secondary LDO providing isolated, low-noise 3.3V domain for real-time processing cores. Use Value: Integrated discharge enables deterministic power-down of vision pipeline before MCU reset-critical for ASIL-B functional safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7315Q-33W5-7 | No integrated output discharge; identical electrical specs except VOUT decay relies on external RC network. | Suitable where controlled shutdown timing is less critical and board space permits external discharge circuit. | Select when cost sensitivity outweighs need for integrated discharge and system-level sequencing simplicity. |
| TLD1130FV | Higher 300mA output, wider 2.5V–42V input, but higher 120µA IQ and 120µVrms noise; no AEC-Q100 Grade 1 rating. | Targeted at body electronics with higher current needs but lower noise immunity requirements. | Choose only if >150mA load or >5.25V input is required; avoid for RF/camera applications due to elevated noise. |
Compared with AP7315Q-33W5-7, the DQ variant adds deterministic VOUT discharge without increasing quiescent current or degrading PSRR/noise-making it superior for ADAS and infotainment sequencing. Versus TLD1130FV, AP7315DQ-33W5-7 offers tighter voltage accuracy, lower noise, and formal AEC-Q100 Grade 1 validation essential for safety-critical domains.
Availability
AP7315DQ-33W5-7 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, vehicle telematics units, and RF communication subsystems requiring stable component supply with full AEC-Q100 traceability.
Supply support for AP7315DQ-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 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 AP7315Q series belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for noise-sensitive, thermally demanding vehicle subsystems where AEC-Q100 Grade 1 compliance and PPAP-ready documentation are mandatory.
FAQ
What is the purpose of the NC pin (Pin 4) on AP7315DQ-33W5-7?
Pin 4 is a no-connect terminal with no internal connection to silicon or bond wires. It serves solely as a mechanical alignment aid during SMT placement and must remain unconnected on the PCB. Routing traces or placing copper near this pin provides no electrical or thermal benefit and may risk solder bridging during reflow.
Does AP7315DQ-33W5-7 require an external pull-up resistor on the EN pin?
No external pull-up is required. The EN pin has no internal pull-up; however, it must never be left floating. If enable control is unused, tie EN directly to VIN to maintain regulation. Driving EN from a microcontroller GPIO is acceptable provided the output meets VIH ≥ 1.3V and VIL ≤ 0.5V thresholds across temperature.
How does the output discharge function operate during shutdown?
When EN is pulled low, the internal 30Ω N-channel FET connects VOUT to GND, discharging external output capacitance exponentially with τ ≈ RDISCH × COUT. For a typical 10µF ceramic output cap, VOUT falls from 3.3V to <100mV in <330µs-enabling rapid, predictable power-down for functional safety sequencing without external components.
Can AP7315DQ-33W5-7 be used outside automotive applications?
Yes-it retains full electrical and thermal specifications in commercial environments. However, its AEC-Q100 qualification, PPAP documentation support, and automotive-specific reliability testing (e.g., extended temperature cycling, board-level vibration) make it especially valuable for industrial IoT and medical devices requiring high long-term stability and supply-chain assurance, even without formal automotive certification.
AP7315DQ-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):
- 5.25V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.29V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 60 µA
- Current - Supply (Max):
- 100 µA
- PSRR:
- 75dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP7315DQ-33W5-7 FAQ
1.How can I place an order for AP7315DQ-33W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7315DQ-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 AP7315DQ-33W5-7 reliable?
The price and inventory of AP7315DQ-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 AP7315DQ-33W5-7 is usually 5 days.
3.What payment methods are accepted for AP7315DQ-33W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7315DQ-33W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7315DQ-33W5-7?
AP7315DQ-33W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7315DQ-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 AP7315DQ-33W5-7?
For technical support, including AP7315DQ-33W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7315DQ-33W5-7 requirements.
6.How does Aetrix verify that AP7315DQ-33W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7315DQ-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 AP7315DQ-33W5-7 meets industry standards.
7.What is the process for return or replacement of AP7315DQ-33W5-7?
All AP7315DQ-33W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7315DQ-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 AP7315DQ-33W5-7 part is unused and in its original packaging.
Return procedure for AP7315DQ-33W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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