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Diodes Incorporated AP7375Q-33FDCW-7
- Part No.:
- AP7375Q-33FDCW-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
AP7375Q-33FDCW-7.pdf
- Description:
- LDO CMOS LOWCURR U-DFN2020-6/SWP
- Quantity:
- Payment:
- Shipping:
Inventory:1,707
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Product details
Overview
AP7375Q-33FDCW-7 from Diodes Incorporated is an AEC-Q100 qualified automotive-grade ultra-low-dropout linear regulator delivering 3.3V fixed output at up to 300mA, with 45V max input voltage, 2.1µA quiescent current, and 35mV dropout at 10mA load. It features integrated short-circuit and thermal shutdown protection, EN pin rated to 45V, and fast transient response for use in body control modules and EV battery management systems.
For engineers reviewing the AP7375Q-33FDCW-7 datasheet, AP7375Q-33FDCW-7 pinout, AP7375Q-33FDCW-7 application, or AP7375Q-33FDCW-7 equivalent, this device supports high-reliability automotive power rails where wide VIN range, low IQ, and robust fault protection are critical selection criteria.
Technical Context
The AP7375Q-33FDCW-7 implements a PMOS pass transistor architecture enabling ultra-low dropout (35mV @ 10mA) and high PSRR (85dB @ 1kHz), with internal compensation ensuring stability with 1µF–10µF ceramic output capacitors. Its EN pin accepts up to 45V directly, eliminating level-shifting circuitry in high-side enable configurations.
Thermal protection activates at +150°C junction temperature with +10°C hysteresis, and current limiting clamps output at ~500mA during overload or short-circuit events. The device operates across –40°C to +125°C ambient and maintains ±2% output voltage accuracy over line, load, and temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2% - ensures stable MCU core or CAN transceiver supply without external feedback components. |
| Input Voltage Range | 3V to 45V - supports direct connection to automotive 12V/24V/42V battery rails including cold-crank and load-dump transients. |
| Max Output Current | 300mA continuous - sufficient for powering microcontrollers, sensors, and LIN/CAN transceivers in distributed ECUs. |
| Quiescent Current | 2.1µA typical - enables always-on functionality in vehicle entry systems and telematics without excessive battery drain. |
| Dropout Voltage | 35mV @ 10mA / 350mV @ 100mA - preserves regulation during low-VIN conditions such as engine cranking (≥6V). |
| PSRR | 85dB @ 1kHz - suppresses alternator ripple and switching noise from adjacent DC-DC converters. |
| Thermal Shutdown | +150°C activation with +10°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
| EN Pin Voltage Range | –0.3V to +45V - allows direct interface with 12V/24V logic or microcontroller GPIO without external resistive dividers. |
Pinout & Package
AP7375Q-33FDCW-7 uses the U-DFN2020-6 (SWP) Type UXC package: 2.0mm × 2.0mm × 0.6mm body with 0.65mm pitch, exposed thermal pad (EP), and RoHS-compliant NiPdAu-plated terminals. Recommended PCB layout uses ≥10mm² copper area connected to EP for thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Regulated 3.3V output - connect to local decoupling capacitor (min. 1µF X7R ceramic) within 2mm of pin. |
| 2 | VIN | Main input (3–45V) - requires 1µF ceramic capacitor placed adjacent to pin; trace width ≥0.5mm for 300mA routing. |
| 3 | GND | Analog/digital ground reference - tie directly to PCB ground plane; avoid shared return paths with high-current loads. |
| 4 | GND | Secondary ground terminal - improves thermal conduction and reduces ground impedance in high-noise environments. |
| 5 | EN | Enable control input - active-high; drives internal LDO gate; tolerates 45V input without external protection. |
| 6 | GND | Third ground terminal - enhances thermal performance and minimizes ground bounce during load transients. |
| EP | Exposed Pad | Thermal path only - must be soldered to ≥10mm² PCB copper area tied to GND; not electrically functional as signal node. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range (3–45V) | Eliminates need for pre-regulator in 12V/24V automotive systems facing load dump (ISO 7637-2 Pulse 5a) and cold-crank (down to 3V). |
| 2.1µA quiescent current | Enables <10µA system standby current when paired with low-IQ microcontrollers in key-off monitoring applications. |
| 35mV dropout @ 10mA | Maintains regulation during engine cranking (VIN ≥6V) while powering 3.3V logic without brownout resets. |
| ±2% output accuracy | Meets ASIL-B voltage tolerance requirements for MCU I/O supply without calibration or trimming. |
| Integrated short-circuit protection | Clamps output current at ~500mA and recovers automatically after fault removal - no external current-sense resistor required. |
| AEC-Q100 Grade 1 qualification | Validated for operation from –40°C to +125°C ambient, PPAP-capable, and manufactured in IATF 16949-certified facilities. |
Applications
| Body Control Module (BCM) | EV Battery Management Unit (BMU) |
|---|---|
Use Scenario: Powering 3.3V microcontroller, CAN transceiver, and door-lock actuator drivers in centralized vehicle body electronics. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying MCU core and peripheral I/O, with EN controlled by vehicle wake-up bus. Use Value: 2.1µA IQ extends battery life during sleep mode; 45V VIN withstands jump-start transients; ±2% accuracy ensures reliable ADC reference stability. |
Use Scenario: Regulating auxiliary 3.3V rail for cell monitoring ICs and isolation gate drivers in high-voltage battery packs (400–800V). IC Role / Device Role / Timing Role: Isolated secondary-side LDO powered from isolated DC-DC converter, providing clean supply for precision analog front-ends. Use Value: 85dB PSRR rejects switching noise from primary-side flyback controller; fast load transient response prevents BMS communication glitches during cell balancing. |
| Automotive Head Unit | Transmission Control Unit (TCU) |
Use Scenario: Supplying 3.3V to audio DSP, touchscreen controller, and Bluetooth/Wi-Fi SoC in infotainment head units. IC Role / Device Role / Timing Role: Secondary LDO post-regulator downstream of buck converter, filtering residual ripple and enabling low-noise analog performance. Use Value: 120µVrms output noise ensures clean audio DAC reference; thermal shutdown protects against enclosure overheating during summer operation. |
Use Scenario: Powering 3.3V FPGA configuration memory, CAN FD transceiver, and solenoid driver logic in automatic transmission controllers. IC Role / Device Role / Timing Role: Fault-tolerant LDO with EN synchronized to transmission ECU watchdog timer for safe power sequencing. Use Value: 45V EN pin allows direct connection to 12V ignition switch; short-circuit protection prevents latch-up during solenoid coil failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-dropout automotive LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73333PQDBVRQ1 | Lower max VIN (6.5V), higher IQ (55µA), smaller 1.5mm × 1.5mm DFN package | Restricted to post-buck 5V rails; unsuitable for direct battery connection | Select when space-constrained and input is pre-regulated; avoid for direct 12V/24V battery interface. |
| MAX25210ATPA/V+T | Higher dropout (170mV @ 300mA), wider temp range (–40°C to +150°C), integrated watchdog | Supports higher junction temperatures but lacks 45V EN pin capability | Prefer for extreme under-hood locations where TJ > +125°C is expected; adds complexity if watchdog not needed. |
Compared with TLV73333PQDBVRQ1 and MAX25210ATPA/V+T, the AP7375Q-33FDCW-7 uniquely combines 45V input/enable capability, 2.1µA IQ, and AEC-Q100 Grade 1 qualification in a thermally enhanced 2mm × 2mm package-making it optimal for direct-battery-powered safety-critical ECUs requiring minimal external components.
Availability
AP7375Q-33FDCW-7 is available at Aetrix Electronics and suitable for automotive body control modules, EV battery management systems, infotainment head units, and transmission control units requiring stable component supply across extended temperature and voltage ranges.
Supply support for AP7375Q-33FDCW-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 for automotive, industrial, computing, and consumer markets.
The AP7375Q series belongs to Diodes' automotive-qualified power management portfolio, designed specifically for high-reliability vehicle subsystems demanding wide-input-range, ultra-low-IQ LDO regulation with integrated fault protection.
FAQ
What is the minimum input voltage required for regulation at 300mA load?
The AP7375Q-33FDCW-7 requires VIN ≥ VOUT + VDROP(MAX). At 300mA, typical dropout is 1200mV (max 1400mV per datasheet), so minimum VIN is 4.5V. Below this, output voltage drops below 3.3V nominal. This threshold increases slightly at high temperature due to VDROP drift.
Can the EN pin be left floating, or must it be actively driven?
The EN pin must not be left floating: it has no internal pull-up/down and will cause unpredictable startup behavior. Tie to VIN via 100kΩ resistor for always-on operation, or drive actively with 0V/12V logic. Floating EN may result in partial turn-on, thermal stress, or oscillation.
Is the exposed pad (EP) electrically connected to GND internally?
No-the EP is thermally conductive only and not electrically connected to any internal node. It must be soldered to a PCB copper area tied to GND for thermal performance, but it serves no electrical function and must not be used as a signal return path.
How does the AP7375Q-33FDCW-7 behave during short-circuit events?
Under short-circuit, output current is clamped to ~500mA (typical), causing VOUT to drop to ~0.3V. Junction temperature rises rapidly; if it reaches +150°C, thermal shutdown disables the pass transistor. After cooling by ~10°C, automatic recovery occurs without external reset.
AP7375Q-33FDCW-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-UDFN Exposed Pad
- 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, Wettable Flank
- Supplier Device Package:
- U-DFN2020-6 (SWP) (Type UXC)
AP7375Q-33FDCW-7 FAQ
1.How can I place an order for AP7375Q-33FDCW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7375Q-33FDCW-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-33FDCW-7 reliable?
The price and inventory of AP7375Q-33FDCW-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-33FDCW-7 is usually 5 days.
3.What payment methods are accepted for AP7375Q-33FDCW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7375Q-33FDCW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7375Q-33FDCW-7?
AP7375Q-33FDCW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7375Q-33FDCW-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-33FDCW-7?
For technical support, including AP7375Q-33FDCW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7375Q-33FDCW-7 requirements.
6.How does Aetrix verify that AP7375Q-33FDCW-7 is sourced from the original manufacturer or authorized distributors?
All AP7375Q-33FDCW-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-33FDCW-7 meets industry standards.
7.What is the process for return or replacement of AP7375Q-33FDCW-7?
All AP7375Q-33FDCW-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7375Q-33FDCW-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-33FDCW-7 part is unused and in its original packaging.
Return procedure for AP7375Q-33FDCW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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