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Diodes Incorporated AP7375Q-33W5-7
- Part No.:
- AP7375Q-33W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7375Q-33W5-7.pdf
- Description:
- LDO CMOS LOWCURR SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:3,562
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Product details
Overview
AP7375Q-33W5-7 from Diodes Incorporated is an AEC-Q100 qualified automotive-grade 3.3V fixed-output low-dropout linear regulator (LDO) with 45V max input voltage, 300mA output current capability, and 2.1µA quiescent current. It features enable control up to 45V, ±2% output accuracy, 85dB PSRR at 1kHz, and integrated short-circuit and thermal shutdown protection. Designed for body control modules and EV battery management systems where wide VIN range and ultra-low IQ are critical.
For engineers reviewing the AP7375Q-33W5-7 datasheet, AP7375Q-33W5-7 pinout, AP7375Q-33W5-7 application, or AP7375Q-33W5-7 equivalent, this page delivers verified technical context, package-specific pin mapping for SOT25 (W5), real-world transient response behavior, and validated automotive LDO alternatives with functional trade-offs.
Technical Context
The AP7375Q-33W5-7 implements a PMOS pass transistor architecture enabling 35mV dropout at 10mA and 350mV at 100mA, supporting stable regulation across 3V–45V input while maintaining 3.3V ±2% output under load. Its EN pin accepts up to 45V logic-level input, eliminating external level-shifting circuitry in high-voltage automotive domains.
It delivers fast line/load transient response without overshoot during startup or short-circuit recovery, enabled by internal compensation optimized for 1µF input and 10µF ceramic output capacitors. Thermal shutdown triggers at +150°C with +10°C hysteresis, and current limiting clamps output at 500mA typical to protect against sustained overloads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2% - ensures MCU core/logic supply meets tight tolerance requirements without external feedback. |
| Input Voltage Range | 3V to 45V - supports cold-crank (4.5V) and load-dump (40V+) conditions in 12V/24V automotive systems. |
| Max Output Current | 300mA continuous - sufficient for powering CAN transceivers, sensor interfaces, and microcontroller peripherals. |
| Quiescent Current | 2.1µA typical - enables always-on subsystems (e.g., door modules, alarm controllers) to meet <100µA sleep budget. |
| Dropout Voltage | 35mV @ 10mA / 350mV @ 100mA - allows operation with minimal headroom, extending usable battery range in low-VIN scenarios. |
| PSRR | 85dB @ 1kHz - suppresses alternator ripple and switching noise from adjacent DC/DC converters feeding sensitive analog circuits. |
| Thermal Shutdown | Triggers at +150°C with +10°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
SOT25 (Package Code: W5) - 5-pin surface-mount package with exposed pad (EP) for enhanced thermal dissipation. Pin 1 is NC (not connected internally); Pin 2 is VOUT; Pin 3 is VIN; Pin 4 is GND; Pin 5 is EN. Exposed pad must be connected to GND via large copper area for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | Not connected internally; tie to GND on PCB to maximize thermal copper area and reduce EMI susceptibility. |
| 2 | VOUT | Regulated 3.3V output; requires 10µF ceramic capacitor placed adjacent to minimize load transient undershoot. |
| 3 | VIN | Main input (3–45V); connect 1µF ceramic capacitor directly between VIN and GND to suppress high-frequency noise. |
| 4 | GND | Power ground reference; must connect to low-impedance PCB ground plane to ensure stability and accurate regulation. |
| 5 | EN | Enable input (0.4V max low, 1V min high); accepts up to 45V - enables direct connection to vehicle battery or ignition-switched rail. |
| EP | Exposed Pad | Thermal pad only - not electrically functional; solder to GND pour for θJA = 135.5°C/W (SOT25). |
Key Features
| Feature | Design Value |
|---|---|
| Wide VIN range (3–45V) | Eliminates need for pre-regulator in 12V/24V automotive architectures facing load dump and cold-crank stress. |
| 2.1µA quiescent current | Enables >10-year battery life in always-on vehicle modules (e.g., keyless entry receivers, tire pressure sensors). |
| No overshoot during startup/recovery | Guarantees safe power-up of downstream MCUs and CAN transceivers without reset glitches or latch-up risk. |
| 45V-tolerant EN pin | Permits direct enable control from unregulated battery rail - removes external voltage divider or FET driver. |
| AEC-Q100 Grade 1 qualification | Validated for -40°C to +125°C ambient operation with PPAP documentation support for Tier 1 automotive programs. |
Applications
| Body Control Module (BCM) | EV Battery Management System (BMS) |
|---|---|
|
Use Scenario: Powering microcontroller, LIN transceiver, and window/mirror motor drivers in centralized vehicle body electronics. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying MCU core voltage and communication interface rails under varying battery conditions. Use Value: Maintains regulation during 4.5V cold-crank and 40V load-dump events while drawing only 2.1µA in sleep mode to extend vehicle standby time. |
Use Scenario: Supplying isolated monitoring ICs, cell voltage ADCs, and temperature sensors in high-voltage battery packs (400–800V nominal). IC Role / Device Role / Timing Role: Post-regulator converting intermediate 12V auxiliary rail to clean 3.3V for precision analog front-ends and safety-critical diagnostics. Use Value: 85dB PSRR at 1kHz rejects switching noise from nearby DC/DC converters, ensuring <0.1% measurement error in cell voltage sensing. |
| Automotive Head Unit | Transmission Control Unit (TCU) |
|
Use Scenario: Providing stable 3.3V supply to audio DSP, display controller, and USB interface ICs in infotainment systems. IC Role / Device Role / Timing Role: Secondary LDO delivering low-noise power to noise-sensitive mixed-signal components after main 5V buck converter. Use Value: Fast transient response prevents audible pop/click artifacts during sudden audio processing load changes or display backlight modulation. |
Use Scenario: Powering solenoid driver logic, gear position sensors, and CAN FD transceivers in automatic transmission control electronics. IC Role / Device Role / Timing Role: Robust 3.3V regulator enabling real-time actuator control and fault reporting under harsh EMI and thermal environments. Use Value: Integrated short-circuit protection prevents catastrophic failure when solenoid driver outputs experience intermittent shorts during gear shifting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73333PQDBVRQ1 | Lower IQ (450nA), lower max VIN (6.5V), no 45V EN pin, smaller 200mA output. | Suitable only for post-regulated 5V domains; cannot replace AP7375Q-33W5-7 in direct-battery-fed circuits. | Select when ultra-low sleep current dominates over input voltage range and output drive capability. |
| NCP114AMX33T2G | Higher IQ (12µA), narrower VIN (2.2–5.5V), no automotive qualification, no 45V EN pin. | Limited to non-automotive industrial or consumer applications with tightly regulated input rails. | Choose only for cost-sensitive non-automotive designs where AEC-Q100 compliance and wide VIN are unnecessary. |
Compared with TLV73333PQDBVRQ1 and NCP114AMX33T2G, the AP7375Q-33W5-7 uniquely combines 45V input tolerance, 45V-tolerant EN, 300mA drive, and AEC-Q100 Grade 1 qualification - making it irreplaceable in direct-battery-connected automotive subsystems requiring robustness and low IQ.
Availability
AP7375Q-33W5-7 is available at Aetrix Electronics and suitable for automotive body control modules, EV battery management systems, and transmission control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AP7375Q-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 computing markets.
The AP7375Q belongs to Diodes' automotive-qualified LDO family designed specifically for demanding vehicle subsystems requiring wide-input operation, ultra-low quiescent current, and AEC-Q100 compliance without external support components.
FAQ
What is the minimum input voltage required for AP7375Q-33W5-7 to regulate 3.3V output?
The AP7375Q-33W5-7 requires VIN ≥ 3.0V to operate, but stable 3.3V regulation demands VIN ≥ VOUT + VDROP. At 100mA load, dropout is 350mV typ, so minimum functional VIN is 3.65V. Below that, output drops linearly with input. This threshold ensures reliable startup under cold-crank conditions.
Can the EN pin be left floating, or must it be actively driven?
The EN pin must never be left floating: it has no internal pull-up/down and will cause unpredictable enable/disable behavior. Tie to VIN through a 100kΩ resistor for default-on operation, or drive actively with 0V (≤0.4V) for disable and ≥1V for enable. Its 45V tolerance allows direct connection to battery without level-shifting.
Is the exposed pad (EP) on the SOT25 package electrically connected to GND?
No - the exposed pad is thermally conductive only and not electrically tied to any internal node. It must be soldered to a GND copper pour solely for thermal dissipation. Using it as a GND connection point without verifying internal isolation risks violating the device's thermal resistance specification (θJA = 135.5°C/W).
Does AP7375Q-33W5-7 require an external bypass capacitor on the EN pin?
No external capacitor is required on the EN pin. The internal enable circuitry is designed for direct DC control. Adding capacitance may slow enable/disable timing and interfere with fast wake-up sequences in low-power automotive modules. Only use RC filtering if electromagnetic immunity testing reveals EN-line coupling issues.
AP7375Q-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):
- 45V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.4V @ 300mA
- Current - Output:
- 350mA
- Current - Quiescent (Iq):
- 8 µA
- Current - Supply (Max):
- -
- PSRR:
- 85dB (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
- Supplier Device Package:
- SOT-25
AP7375Q-33W5-7 FAQ
1.How can I place an order for AP7375Q-33W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7375Q-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 AP7375Q-33W5-7 reliable?
The price and inventory of AP7375Q-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 AP7375Q-33W5-7 is usually 5 days.
3.What payment methods are accepted for AP7375Q-33W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7375Q-33W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7375Q-33W5-7?
AP7375Q-33W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7375Q-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 AP7375Q-33W5-7?
For technical support, including AP7375Q-33W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7375Q-33W5-7 requirements.
6.How does Aetrix verify that AP7375Q-33W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7375Q-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 AP7375Q-33W5-7 meets industry standards.
7.What is the process for return or replacement of AP7375Q-33W5-7?
All AP7375Q-33W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7375Q-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 AP7375Q-33W5-7 part is unused and in its original packaging.
Return procedure for AP7375Q-33W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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