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Diodes Incorporated AP7375Q-18W5-7
- Part No.:
- AP7375Q-18W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7375Q-18W5-7.pdf
- Description:
- LDO CMOS LOWCURR SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:3,427
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Product details
Overview
AP7375Q-18W5-7 from Diodes Incorporated is an AEC-Q100 qualified automotive-grade 1.8V fixed-output ultra-low-dropout linear regulator (LDO) with 45V max input voltage, 300mA output current capability, and 2.1µA typical quiescent current. It features enable pin tolerance up to 45V, ±2% output accuracy, and integrated short-circuit and thermal shutdown protection. Designed for power-sensitive automotive subsystems including body control modules and battery management systems.
For engineers reviewing the AP7375Q-18W5-7 datasheet, AP7375Q-18W5-7 pinout, AP7375Q-18W5-7 application, or AP7375Q-18W5-7 equivalent, this part supports high-reliability 1.8V rail generation in wide-input automotive environments where low IQ, fast transient response, and robust fault protection are critical selection criteria.
Technical Context
The AP7375Q-18W5-7 implements a PMOS pass transistor architecture enabling ultra-low dropout (35mV @ 10mA) and high PSRR (85dB @ 1kHz). Its EN pin accepts up to 45V directly, eliminating external level-shifting circuitry in high-voltage automotive domains.
It delivers stable 1.8V output across -40°C to +125°C ambient temperature with <0.025%/mA load regulation and <0.02%/V line regulation. Internal thermal shutdown triggers at +150°C with +10°C hysteresis, and short-circuit current limit is set at 500mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2% - ensures precise MCU core voltage compliance without external feedback. |
| Input Voltage Range | 3V to 45V - supports direct connection to automotive battery (cold crank, load dump) without pre-regulation. |
| Max Output Current | 300mA - sufficient for powering 1.8V logic rails in CAN/LIN transceivers and microcontrollers. |
| Quiescent Current | 2.1µA typ - enables always-on functionality in low-power automotive modules without battery drain. |
| Dropout Voltage | 35mV @ 10mA, 350mV @ 100mA - maintains regulation during deep battery discharge (e.g., 6V cranking). |
| PSRR | 85dB @ 1kHz - suppresses alternator ripple and switching noise on sensitive analog/digital supplies. |
| Thermal Shutdown | +150°C with +10°C hysteresis - prevents latch-up during sustained overload or poor PCB thermal design. |
Pinout & Package
AP7375Q-18W5-7 uses the SOT25 (Package Code: W5) 5-pin surface-mount package with exposed pad for thermal dissipation. Pin 1 = NC (connect to GND), Pin 2 = VOUT, Pin 3 = VIN, Pin 4 = GND, Pin 5 = EN. The exposed pad (EP) must be connected to large copper area tied to GND for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No-connect internal terminal | Must be connected to GND on PCB to maximize thermal copper area; not electrically active. |
| 2 (VOUT) | Regulated 1.8V output | Delivers stable 1.8V supply; requires 10µF ceramic capacitor placed adjacent to pin for stability. |
| 3 (VIN) | Main input supply (3–45V) | Accepts full automotive battery range; requires 1µF ceramic decoupling capacitor near pin. |
| 4 (GND) | Power ground reference | Primary return path; must connect to low-impedance ground plane to minimize noise and dropout error. |
| 5 (EN) | Enable control input | Active-high logic; accepts 0–45V directly-no level shifter needed for 12V/24V system control. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input voltage range | 3V–45V operation eliminates need for upstream buck converter in 12V/24V/48V automotive architectures. |
| Ultra-low quiescent current | 2.1µA typ enables >10-year battery standby life in always-on vehicle modules (e.g., door ECU). |
| Fast transient response | No overshoot during startup or short-circuit recovery - critical for reliable MCU boot sequencing. |
| Integrated protection | Auto-recovering thermal shutdown and current-limiting prevent field failures without external circuitry. |
| AEC-Q100 qualification | Qualified to Grade 1 (-40°C to +125°C) with PPAP support - meets OEM requirements for production automotive use. |
Applications
| Automotive Body Control Module (BCM) | EV Battery Management System (BMS) Sensor Interface |
|---|---|
Use Scenario: Powering 1.8V I/O and ADC reference rails for door lock, lighting, and window control microcontrollers. IC Role / Device Role / Timing Role: Primary 1.8V LDO supplying MCU core and peripheral logic under cold-crank (6V) and load-dump (40V) conditions. Use Value: Maintains regulation down to 6.035V input (35mV dropout at 10mA), ensuring uninterrupted operation during engine start. |
Use Scenario: Providing isolated 1.8V supply to precision temperature and voltage sensing ICs in high-voltage battery packs. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO delivering clean bias for 16-bit ADCs monitoring cell voltages. Use Value: 85dB PSRR at 1kHz rejects switching noise from nearby DC-DC converters, preserving measurement accuracy. |
| CAN/LIN Transceiver Power Rail | Automotive Head Unit Audio DSP Core |
Use Scenario: Supplying 1.8V logic interface for ISO 11898-2 CAN transceivers and LIN physical layer ICs. IC Role / Device Role / Timing Role: Dedicated low-IQ LDO enabling wake-on-CAN functionality while minimizing parasitic battery drain. Use Value: 2.1µA quiescent current extends vehicle sleep mode duration beyond 30 days without battery depletion. |
Use Scenario: Generating 1.8V core voltage for audio DSPs and codecs in infotainment head units. IC Role / Device Role / Timing Role: High-stability LDO supporting real-time audio processing with minimal supply-induced jitter. Use Value: ±2% output accuracy and <0.025%/mA load regulation ensure consistent DSP clock domain performance across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73318PQDBVRQ1 | Lower max input (6.5V), higher IQ (45µA), same 300mA output and 1.8V fixed output. | Suitable only for post-regulated 5V/3.3V domains-not for direct battery connection. | Select when input is already regulated and lower cost is prioritized over wide-VIN capability. |
| TPS7B8718QKVURQ1 | Higher IQ (18µA), wider input (40V), same AEC-Q100 Grade 1, but larger SO-8EP package. | Better thermal performance (θJA = 47.7°C/W) but requires more PCB area than SOT25. | Select when higher continuous current (>250mA at elevated ambient) or enhanced thermal margin is required. |
Compared with TLV73318PQDBVRQ1 and TPS7B8718QKVURQ1, the AP7375Q-18W5-7 uniquely combines 45V input tolerance, 2.1µA IQ, and SOT25 footprint-enabling compact, battery-direct 1.8V regulation where space, efficiency, and input ruggedness are jointly constrained.
Availability
AP7375Q-18W5-7 is available at Aetrix Electronics and suitable for automotive body control modules, EV battery management sensor interfaces, and CAN/LIN transceiver power rails requiring stable component supply across extended temperature and high-reliability automotive programs.
Supply support for AP7375Q-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 manufacturer specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets, with IATF 16949-certified manufacturing facilities.
The AP7375Q series belongs to Diodes' automotive-qualified LDO portfolio, designed specifically to meet stringent AEC-Q100 requirements for wide-input, ultra-low-IQ power management in harsh-temperature vehicle subsystems.
FAQ
What is the maximum allowable input voltage for AP7375Q-18W5-7?
The absolute maximum input voltage is 55V, but the recommended operating range is 3V to 45V per the datasheet. Operation above 45V risks exceeding safe power dissipation limits and may trigger thermal shutdown even at light loads due to excessive VIN–VOUT differential.
Can the EN pin be driven directly from a 12V microcontroller GPIO?
No-EN is active-high with VENL ≤ 0.4V and VENH ≥ 1V, but its absolute maximum rating is 55V. A 12V GPIO exceeds the recommended logic-level interface; use a resistor divider or open-drain driver referenced to VIN to safely interface with 3.3V/5V controllers.
Is the NC pin on AP7375Q-18W5-7 required to be connected?
Yes-the NC pin (Pin 1) is internally unconnected but must be soldered to GND on the PCB. This maximizes copper area for thermal conduction from the die through the leadframe, reducing θJA by up to 15°C/W compared to leaving it floating.
Does AP7375Q-18W5-7 require an external output capacitor, and what type is recommended?
Yes-a minimum 1µF ceramic capacitor (X5R or X7R dielectric) is mandatory for stability. Diodes recommends 10µF for optimal load transient response; place it within 2mm of VOUT and GND pins using short, wide traces to minimize ESL and maintain phase margin.
AP7375Q-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):
- 45V
- Voltage - Output (Min/Fixed):
- 1.8V
- 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-18W5-7 FAQ
1.How can I place an order for AP7375Q-18W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7375Q-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 AP7375Q-18W5-7 reliable?
The price and inventory of AP7375Q-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 AP7375Q-18W5-7 is usually 5 days.
3.What payment methods are accepted for AP7375Q-18W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7375Q-18W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7375Q-18W5-7?
AP7375Q-18W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7375Q-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 AP7375Q-18W5-7?
For technical support, including AP7375Q-18W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7375Q-18W5-7 requirements.
6.How does Aetrix verify that AP7375Q-18W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7375Q-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 AP7375Q-18W5-7 meets industry standards.
7.What is the process for return or replacement of AP7375Q-18W5-7?
All AP7375Q-18W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7375Q-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 AP7375Q-18W5-7 part is unused and in its original packaging.
Return procedure for AP7375Q-18W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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