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Diodes Incorporated AP7375Q-33SP-13
- Part No.:
- AP7375Q-33SP-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
AP7375Q-33SP-13.pdf
- Description:
- LDOCMOSLOWCURRSO-8EPT&R2.5K
- Quantity:
- Payment:
- Shipping:
Inventory:1,109
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Product details
Overview
AP7375Q-33SP-13 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 EN pin rated to 45V, integrated short-circuit and thermal shutdown protection, and ±2% output voltage accuracy. It powers MCUs and CAN/LIN transceivers in body control modules and EV battery management systems.
For engineers reviewing the AP7375Q-33SP-13 datasheet, AP7375Q-33SP-13 pinout, AP7375Q-33SP-13 application, or AP7375Q-33SP-13 equivalent, key selection criteria include wide 3–45V input range, ultra-low IQ for always-on automotive circuits, fast transient response without overshoot, SO-8EP package thermal performance (θJA = 47.7°C/W), and AEC-Q100 qualification for under-hood deployment.
Technical Context
The AP7375Q-33SP-13 uses a PMOS pass transistor architecture enabling ultra-low dropout (35mV @ 10mA) and high PSRR (85dB @ 1kHz). Its enable circuit accepts up to 45V directly, eliminating external level-shifting for high-side EN control in 12V/24V/48V automotive systems.
Internal protection includes current limiting (500mA typical), thermal shutdown at +150°C with +10°C hysteresis, and robust ESD tolerance (3kV HBM, 1.5kV CDM). The device maintains stability with 1µF input and 10µF ceramic output capacitors, supporting X5R/X7R dielectrics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2% - ensures stable MCU core/logic supply within automotive voltage tolerance bands |
| Input Voltage Range | 3V to 45V - supports cold-crank (≥3V), load-dump (≤45V), and multi-battery architectures |
| Max Output Current | 300mA - sufficient for powering dual-core automotive MCUs and companion CAN transceivers |
| Quiescent Current | 2.1µA typ - enables >10-year battery standby life in always-on vehicle modules |
| Dropout Voltage | 350mV @ 100mA - allows regulation down to VIN = 3.65V while maintaining 3.3V output |
| PSRR | 85dB @ 1kHz - suppresses alternator ripple and switching noise before sensitive analog/digital loads |
| Thermal Resistance | θJA = 47.7°C/W (SO-8EP) - enables 300mA operation at +105°C ambient with minimal heatsinking |
Pinout & Package
AP7375Q-33SP-13 is housed in a thermally enhanced SO-8EP (exposed pad) package measuring 4.90 × 3.85 mm, with 0.65 mm pitch and RoHS-compliant matte tin plating. The exposed pad (Pin EP) must be connected to PCB ground plane for optimal thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; accepts 3–45V with internal overvoltage clamp |
| 2, 3, 4, 6 | GND | Four dedicated ground terminals - reduce impedance and improve PSRR/stability |
| 5 | EN | Enable input; active-high, 45V-tolerant - direct interface to microcontroller GPIO or ignition-sense rail |
| 7 | VOUT | Regulated 3.3V output; requires 10µF ceramic capacitor placed adjacent to pin |
| 8 | NC | No-connect terminal; recommended to tie to GND for mechanical stability and thermal conduction |
| EP | Exposed Pad | Thermal path to PCB ground plane; not electrically functional but critical for θJA = 47.7°C/W |
Key Features
| Feature | Design Value |
|---|---|
| 45V-tolerant EN pin | Eliminates external voltage divider or level shifter when enabling from 24V/48V system rails |
| Fast transient response | No output overshoot during startup or short-circuit recovery - avoids MCU brown-out resets |
| Ultra-low 2.1µA quiescent current | Enables <10µA system sleep current in conjunction with MCU power gating |
| ±2% output accuracy over temp | Guarantees 3.234–3.366V across –40°C to +125°C junction - meets ASIL-B voltage monitoring requirements |
| Integrated thermal shutdown | +150°C trip with +10°C hysteresis - prevents latch-up during sustained overload or poor heatsinking |
Applications
| Automotive Body Control Module (BCM) | EV Battery Management System (BMS) Sensor Interface |
|---|---|
Use Scenario: Powering 32-bit ARM-based microcontroller, LIN transceiver, and door-lock actuator drivers in centralized BCM. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying MCU I/O, communication peripherals, and analog sensor biasing. Use Value: 45V input range withstands load-dump events; 2.1µA IQ extends vehicle-off battery life; AEC-Q100 qualification ensures reliability over 15-year service life. |
Use Scenario: Regulating supply for isolated current-sense amplifiers, temperature sensors, and cell-monitoring ICs in high-voltage EV battery packs. IC Role / Device Role / Timing Role: Post-isolation 3.3V rail generator for analog front-end signal conditioning circuitry. Use Value: 350mV dropout at 100mA allows operation from 12V auxiliary supply even under brownout; 85dB PSRR rejects switching noise from nearby DC-DC converters. |
| Transmission Control Unit (TCU) | Automotive Head Unit (HU) Audio Subsystem |
Use Scenario: Providing clean 3.3V power to transmission controller MCU, CAN FD transceiver, and solenoid driver logic in harsh under-hood environment. IC Role / Device Role / Timing Role: High-reliability LDO with EN controlled by engine ECU wake signal. Use Value: SO-8EP package delivers 47.7°C/W thermal resistance - sustains 300mA continuous load at +105°C ambient; AEC-Q100 Grade 1 rating covers full automotive temperature range. |
Use Scenario: Supplying 3.3V to audio DSP, ADC/DAC, and touch-controller in infotainment head unit with start-stop functionality. IC Role / Device Role / Timing Role: Always-on LDO maintaining real-time clock and memory retention during engine cranking. Use Value: 3V minimum input enables regulation during cold-crank (as low as 6V battery); no overshoot on power-up prevents audio codec initialization faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLE42754G | 5V fixed output only; 400mA output; higher IQ (15µA); TO-252 package (θJA = 60°C/W) | Requires external resistor divider for 3.3V use; less suitable for ultra-low-power always-on nodes | Select if 5V rail needed or TO-252 mechanical fit required; avoid for 3.3V precision or low-IQ designs |
| TPS7B8233QPWPRQ1 | 3.3V fixed; 300mA; 2.5µA IQ; WSON-8 package (θJA = 52°C/W); lower PSRR (70dB @ 1kHz) | Slightly higher IQ and lower noise rejection; smaller footprint but reduced thermal margin at full load | Select for space-constrained layouts where 5°C/W higher θJA is acceptable; verify PSRR meets EMC targets |
Compared with TLE42754G and TPS7B8233QPWPRQ1, AP7375Q-33SP-13 offers the lowest quiescent current (2.1µA), highest PSRR (85dB), and best thermal performance in SO-8EP - making it optimal for high-reliability, low-power automotive subsystems requiring 3.3V regulation.
Availability
AP7375Q-33SP-13 is available at Aetrix Electronics and suitable for automotive body control modules, EV battery management sensor interfaces, and transmission control units requiring stable component supply across extended temperature and voltage ranges.
Supply support for AP7375Q-33SP-13 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 series belongs to Diodes' automotive-qualified LDO portfolio, designed specifically for demanding under-hood and chassis applications requiring AEC-Q100 compliance, wide input range, and ultra-low quiescent current.
FAQ
What is the maximum allowable input voltage for AP7375Q-33SP-13?
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 sustained 45V operation, ensure PCB copper area under the exposed pad meets Diodes' SO-8EP layout guidelines to maintain junction temperature below +150°C.
Can the EN pin be driven directly from a 24V microcontroller GPIO?
Yes - the EN pin is rated to 45V and has no internal level-shifting requirement. It asserts high at ≥1V and deasserts low at ≤0.4V, making it compatible with standard 3.3V or 5V MCU outputs, as well as direct connection to 12V/24V ignition-sense rails without external components.
Does AP7375Q-33SP-13 require an external output capacitor, and what type is recommended?
Yes - a minimum 1µF ceramic output capacitor is mandatory for stability. Diodes specifies X5R or X7R dielectrics; 10µF is recommended for optimal load transient response. The capacitor must be placed within 2mm of VOUT and GND pins, with low-inductance layout to prevent oscillation or undershoot during step-load events.
Is AP7375Q-33SP-13 qualified for ASIL-B functional safety applications?
The device is AEC-Q100 Grade 1 qualified (–40°C to +125°C), PPAP-capable, and manufactured in IATF 16949-certified facilities - meeting foundational hardware requirements for ASIL-B. However, functional safety compliance depends on system-level implementation; Diodes does not provide FMEDA reports or ISO 26262 certification for this part.
AP7375Q-33SP-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) 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
- Supplier Device Package:
- 8-SO-EP
AP7375Q-33SP-13 FAQ
1.How can I place an order for AP7375Q-33SP-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7375Q-33SP-13 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-33SP-13 reliable?
The price and inventory of AP7375Q-33SP-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7375Q-33SP-13 is usually 5 days.
3.What payment methods are accepted for AP7375Q-33SP-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7375Q-33SP-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7375Q-33SP-13?
AP7375Q-33SP-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7375Q-33SP-13 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-33SP-13?
For technical support, including AP7375Q-33SP-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7375Q-33SP-13 requirements.
6.How does Aetrix verify that AP7375Q-33SP-13 is sourced from the original manufacturer or authorized distributors?
All AP7375Q-33SP-13 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-33SP-13 meets industry standards.
7.What is the process for return or replacement of AP7375Q-33SP-13?
All AP7375Q-33SP-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7375Q-33SP-13, 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-33SP-13 part is unused and in its original packaging.
Return procedure for AP7375Q-33SP-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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