My Inquiry
My Account
Diodes Incorporated AP7375Q-18WR-7
- Part No.:
- AP7375Q-18WR-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7375Q-18WR-7.pdf
- Description:
- LDO CMOS LOWCURR SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:2,528
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP7375Q-18WR-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 quiescent current. It features EN pin tolerance up to 45V, ±2% output accuracy, and integrated short-circuit and thermal shutdown protection. This LDO powers MCUs and CAN/LIN transceivers in body control modules and EV battery management systems.
For engineers reviewing the AP7375Q-18WR-7 datasheet, AP7375Q-18WR-7 pinout, AP7375Q-18WR-7 application, or AP7375Q-18WR-7 equivalent, key selection criteria include its 35mV dropout at 10mA load, 85dB PSRR at 1kHz, -40°C to +125°C operating range, and SOT25 (WR) package thermal performance (θJA = 135.5°C/W).
Technical Context
The AP7375Q-18WR-7 implements a PMOS pass transistor architecture enabling ultra-low dropout and fast transient response without external compensation. Its EN pin accepts up to 45V directly, eliminating level-shifting circuitry in high-voltage automotive domains.
Internal protection includes current limiting (500mA typical), thermal shutdown at +150°C with +10°C hysteresis, and robust ESD immunity (3kV HBM). The device maintains stable regulation across 3V–45V input while delivering 1.8V ±2% under 1mA–300mA loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2% - ensures precise MCU core supply compliance without external feedback. |
| Input Voltage Range | 3V to 45V - supports direct connection to automotive 12V/24V/42V battery rails including load-dump transients. |
| Max Output Current | 300mA - sufficient for low-power microcontrollers, CAN transceivers, and sensor interfaces. |
| Dropout Voltage | 35mV @ 10mA / 350mV @ 100mA - enables operation with minimal headroom, critical for start-stop and cold-crank conditions. |
| Quiescent Current | 2.1µA typ - minimizes standby power loss in always-on vehicle subsystems like alarm controllers. |
| PSRR | 85dB @ 1kHz - suppresses alternator ripple and switching noise before sensitive analog/digital circuits. |
| Thermal Shutdown | +150°C with +10°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
SOT25 (Package Code: WR) - 5-pin surface-mount package with exposed pad (EP) for enhanced thermal dissipation; footprint optimized for automotive PCB layouts requiring high reliability and thermal margin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Regulated 1.8V output - connect to local decoupling capacitor (≥10µF ceramic) within 2mm of pin. |
| 2 | GND | Power ground reference - tie directly to internal PCB ground plane; connects to EP for thermal conduction. |
| 3 | VIN | Main input (3–45V) - requires 1µF ceramic capacitor placed adjacent to pin to suppress supply noise. |
| 4 | GND | Secondary ground terminal - improves current return path separation and reduces ground bounce. |
| 5 | EN | Enable control - logic-high ≥1V enables output; tolerates up to 45V, enabling direct connection to battery-sensed signals. |
| EP | Exposed Pad | Thermal interface - must be soldered to large copper area connected to GND for θJA = 135.5°C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range | 3V–45V operation eliminates need for pre-regulator stages in 12V/24V automotive systems. |
| Ultra-Low IQ | 2.1µA quiescent current extends battery life in always-on modules such as telematics and intrusion detection. |
| Fast Transient Response | No overshoot during startup or short-circuit recovery - ensures reliable boot sequencing for safety-critical ECUs. |
| AEC-Q100 Qualified | Qualified to Grade 1 (-40°C to +125°C) with PPAP support - meets OEM requirements for production automotive electronics. |
| Integrated Protection | Auto-recovering thermal shutdown and foldback current limit prevent field failures due to wiring faults or overloads. |
Applications
| Automotive Body Control Module (BCM) | EV Battery Management System (BMS) Sensor Interface |
|---|---|
|
Use Scenario: Powering 32-bit ARM Cortex-M MCU and LIN transceiver in door module with 12V battery input subject to load dump. IC Role / Device Role / Timing Role: Primary 1.8V core supply regulator with enable controlled by vehicle wake-up signal. Use Value: 45V input tolerance avoids external TVS clamping; 2.1µA IQ enables <10µA system sleep current. |
Use Scenario: Supplying isolated ADC and temperature sensors in high-voltage battery pack monitoring unit. IC Role / Device Role / Timing Role: Post-isolation 1.8V rail generator ensuring clean, stable voltage for precision analog front-end. Use Value: 85dB PSRR rejects switching noise from nearby DC-DC converters; ±2% accuracy maintains sensor measurement integrity. |
| Automotive Head Unit Audio Subsystem | Transmission Control Unit (TCU) Communication Interface |
|
Use Scenario: Providing bias voltage to Class D audio amplifier controller IC in infotainment head unit. IC Role / Device Role / Timing Role: Low-noise 1.8V auxiliary supply decoupled from noisy main 5V rail. Use Value: 120µVrms output noise prevents audible artifacts; fast line transient response prevents audio glitches during engine cranking. |
Use Scenario: Powering CAN FD transceiver in TCU where EMI immunity and thermal robustness are critical. IC Role / Device Role / Timing Role: Dedicated 1.8V VIO supply enabling CAN FD data rate negotiation and error frame handling. Use Value: 35mV dropout allows operation down to 2.0V input during cold-crank; EN pin withstands 45V battery transients without external protection. |
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 IQ (450nA), lower max input (6.5V), no 45V EN tolerance | Restricted to post-DC/DC 3.3V/5V domains; unsuitable for direct battery connection | Select when ultra-low standby power is prioritized over wide-input flexibility. |
| NCP1117ST18T3G | Higher IQ (6mA), higher dropout (1.1V @ 800mA), no AEC-Q100 qualification | Lacks automotive qualification and thermal shutdown hysteresis; limited to industrial use | Use only in non-automotive designs where cost outweighs qualification and efficiency requirements. |
Compared with TLV73318PQDBVRQ1 and NCP1117ST18T3G, the AP7375Q-18WR-7 uniquely combines AEC-Q100 qualification, 45V input/EN tolerance, and sub-3µA IQ-making it the only viable choice for direct-battery-powered automotive modules requiring long-term reliability and low quiescent consumption.
Availability
AP7375Q-18WR-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 stringent quality certifications.
Supply support for AP7375Q-18WR-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 components for automotive, industrial, and computing markets.
The AP7375Q series belongs to Diodes' automotive-qualified LDO portfolio, designed specifically for demanding vehicle subsystems requiring wide-input operation, ultra-low IQ, and robust fault protection under harsh environmental conditions.
FAQ
What is the maximum allowable input voltage for AP7375Q-18WR-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. For automotive battery applications, this rating covers ISO 7637-2 pulse 5a (load dump) transients up to 47.5V.
Does AP7375Q-18WR-7 require external capacitors, and what values are recommended?
Yes: a minimum 1µF ceramic input capacitor (X5R/X7R) must be placed between VIN and GND, and a minimum 10µF ceramic output capacitor (X5R/X7R) between VOUT and GND. Larger output capacitance improves transient response and reduces undershoot/overshoot. Both capacitors must be located within 2mm of their respective pins.
How does the EN pin function, and what voltage levels enable/disable the output?
The EN pin enables the regulator when pulled to ≥1V and disables it when ≤0.4V. It tolerates up to 45V, allowing direct connection to unregulated battery rails or high-side switch outputs without level shifting. Internal pull-down ensures default-off behavior if left floating.
Is AP7375Q-18WR-7 compatible with lead-free reflow processes?
Yes: it is fully RoHS-compliant, halogen- and antimony-free ("Green"), and rated for JEDEC J-STD-020 moisture sensitivity Level 1. The SOT25 (WR) package uses matte tin-plated leads and supports standard Pb-free reflow profiles with peak temperatures up to +260°C for 10 seconds.
AP7375Q-18WR-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
- 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-18WR-7 FAQ
1.How can I place an order for AP7375Q-18WR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7375Q-18WR-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-18WR-7 reliable?
The price and inventory of AP7375Q-18WR-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-18WR-7 is usually 5 days.
3.What payment methods are accepted for AP7375Q-18WR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7375Q-18WR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7375Q-18WR-7?
AP7375Q-18WR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7375Q-18WR-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-18WR-7?
For technical support, including AP7375Q-18WR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7375Q-18WR-7 requirements.
6.How does Aetrix verify that AP7375Q-18WR-7 is sourced from the original manufacturer or authorized distributors?
All AP7375Q-18WR-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-18WR-7 meets industry standards.
7.What is the process for return or replacement of AP7375Q-18WR-7?
All AP7375Q-18WR-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7375Q-18WR-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-18WR-7 part is unused and in its original packaging.
Return procedure for AP7375Q-18WR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP7375Q-18WR-7 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…
Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…
Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …
Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.
Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…
