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Diodes Incorporated AP7387Q-33FDCW-7
- Part No.:
- AP7387Q-33FDCW-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
AP7387Q-33FDCW-7.pdf
- Description:
- IC REG LINEAR 3.3V 150MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,528
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Product details
Overview
AP7387Q-33FDCW-7 from Diodes Incorporated is an AEC-Q100 qualified automotive-grade ultra-low-dropout linear regulator delivering 3.3V at up to 150mA from a 5–60V input range. It features 2μA quiescent current, ±2% output voltage accuracy, 70dB PSRR at 1kHz, and thermal/short-circuit protection - designed for powering MCUs and CAN/LIN transceivers in harsh automotive environments.
For engineers reviewing the AP7387Q-33FDCW-7 datasheet, AP7387Q-33FDCW-7 pinout, AP7387Q-33FDCW-7 application, or AP7387Q-33FDCW-7 equivalent, key selection criteria include wide-input capability (60V max), low-IQ operation under battery-dormant conditions, fast load transient response (<200µs recovery), and U-DFN2020-6 package thermal performance (θJA = 47.9°C/W).
Technical Context
The AP7387Q-33FDCW-7 implements a high-voltage PMOS pass transistor architecture with internal voltage reference, error amplifier, and resistor network for fixed 3.3V output. Its design enables stable regulation across extreme input transients (e.g., load dump up to 60V) while maintaining sub-1.1V dropout at full 150mA load.
Protection logic integrates independent current-limiting (250mA typ.), thermal shutdown (150°C trip with 30°C hysteresis), and short-circuit foldback. The U-DFN2020-6 (SWP) package uses an exposed pad optimized for PCB copper area connection to GND - not as a functional terminal - enabling θJC = 15.5°C/W junction-to-case conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 60V - supports automotive 12V/24V/48V systems and load-dump immunity without external clamping. |
| Output Voltage | 3.3V ±2% - tight tolerance ensures reliable MCU core and CAN transceiver VCC supply under temperature and line variation. |
| Max Output Current | 150mA - sufficient for low-power microcontrollers, LIN transceivers, and sensor signal conditioning circuits. |
| Dropout Voltage | 700mV @100mA (typ.) - enables regulation down to VIN = 4.0V, critical for cold-crank operation in 12V vehicles. |
| Quiescent Current | 2μA (typ.) - minimizes battery drain during vehicle sleep mode (e.g., <10μA system standby budgets). |
| PSRR | 70dB @1kHz - suppresses alternator ripple and switching noise from adjacent DC/DC converters. |
| Thermal Shutdown | 150°C with 30°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
AP7387Q-33FDCW-7 is housed in a 2.0mm × 2.0mm U-DFN2020-6 (SWP) package with wettable flank leads and an exposed thermal pad (EP). The package is RoHS-compliant, halogen-free, and qualified per AEC-Q100 Grade 1 (−40°C to +125°C TA).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Regulated 3.3V output - connect directly to load with low-ESR ceramic capacitor (≥10µF) placed within 2mm. |
| 2 | GND | Power ground reference - tie to main PCB ground plane; low-impedance path essential for stability and PSRR. |
| 3 | VIN | High-voltage input (5–60V) - requires local 1µF X7R ceramic decoupling capacitor placed adjacent to pin. |
| 4 | NC | No internal connection - recommended to connect to GND for enhanced thermal dissipation via PCB copper. |
| 5 | NC | No internal connection - recommended to connect to GND for enhanced thermal dissipation via PCB copper. |
| 6 | GND | Secondary ground terminal - improves current sharing and reduces ground loop impedance in high-noise environments. |
| EP | Exposed Pad | Thermal interface only - must be soldered to ≥25mm² GND copper area; not electrically functional as GND node. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range (5–60V) | Eliminates need for pre-regulator stages in 24V commercial vehicle and 48V mild-hybrid architectures. |
| 2μA quiescent current | Enables >10-year battery life in always-on telematics modules operating on 12V lead-acid standby power. |
| 70dB PSRR @1kHz | Reduces conducted EMI from 100–200kHz DC/DC converters feeding shared 12V rail, improving ADC SNR. |
| Fast transient response (<200µs) | Maintains MCU supply integrity during sudden CAN bus arbitration pulses or LIN wake-up events. |
| Integrated thermal shutdown | Auto-recovery behavior (30°C hysteresis) avoids latch-off failures during intermittent overloads in body control units. |
Applications
| Automotive Body Control Module (BCM) | EV Battery Management System (BMS) Sensor Interface |
|---|---|
|
Use Scenario: Powering 3.3V microcontroller, LIN transceiver, and door-lock actuator drivers in ambient temperatures from −40°C to +105°C. IC Role / Device Role / Timing Role: Primary LDO supplying regulated VCC to safety-critical control logic with AEC-Q100 qualification and PPAP documentation support. Use Value: 60V input rating withstands ISO 7637-2 Pulse 5a load dump; 2μA IQ meets OEM sleep-mode leakage budgets. |
Use Scenario: Biasing isolated current-sense amplifiers and thermistor interfaces in high-voltage battery packs (up to 900V DC bus). IC Role / Device Role / Timing Role: Secondary-side LDO providing clean 3.3V for analog front-end ICs located near HV cells, galvanically isolated via optocouplers or capacitive isolators. Use Value: 70dB PSRR rejects switching noise from nearby isolated flyback controllers; ±2% accuracy ensures precise temperature and voltage measurement. |
| Automotive Head Unit Core Supply | Transmission Control Unit (TCU) Communication Interface |
|
Use Scenario: Delivering stable 3.3V to ARM Cortex-M7 MCU, audio codec, and display controller in infotainment head units. IC Role / Device Role / Timing Role: Low-noise post-regulator after buck converter, reducing ripple-induced audio band distortion and display flicker. Use Value: Fast line/load transient response (<200µs) prevents brownout resets during simultaneous LCD backlight and audio amplifier activation. |
Use Scenario: Powering CAN FD transceivers and watchdog timers in transmission control units exposed to engine bay vibration and thermal cycling. IC Role / Device Role / Timing Role: Dedicated LDO for communication PHY layer, decoupled from noisy powertrain MCU supply rails. Use Value: Thermal shutdown with auto-recovery maintains CAN bus availability during temporary overheating (e.g., parking in direct sun); U-DFN2020-6 footprint saves space in dense TCU PCB layouts. |
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 |
|---|---|---|---|
| TLE42754G | 5V fixed output; higher IQ (15μA typ.); 40V max input; TO-252 package (θJA = 60°C/W) | Limited to 5V systems; less suitable for 3.3V MCU cores; larger thermal footprint required. | Select when 5V logic compatibility is mandatory and board space allows TO-252 mounting. |
| NCP163AMX330TBG | 3.3V output; 12V max input; 250mA output; SOT-23 package; no automotive qualification | Cannot withstand automotive load dump; lacks AEC-Q100 validation and PPAP support. | Acceptable only for non-automotive industrial prototypes where cost outweighs qualification requirements. |
Compared with TLE42754G and NCP163AMX330TBG, AP7387Q-33FDCW-7 uniquely combines 60V input tolerance, 2μA quiescent current, AEC-Q100 Grade 1 qualification, and compact U-DFN2020-6 packaging - making it the only option meeting OEM requirements for next-generation 48V mild-hybrid BCM and BMS subsystems.
Availability
AP7387Q-33FDCW-7 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 ranges and long production lifecycles.
Supply support for AP7387Q-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 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 AP7387Q series belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for demanding vehicle subsystems requiring wide-input operation, ultra-low quiescent current, and robust fault protection under ISO 16750 and ISO 7637-2 stress conditions.
FAQ
What is the maximum input voltage the AP7387Q-33FDCW-7 can withstand continuously?
The AP7387Q-33FDCW-7 operates continuously at up to 60V input voltage per its Recommended Operating Conditions. Its Absolute Maximum Rating is 80V for short-duration transients (e.g., ISO 7637-2 Pulse 5a load dump), but sustained operation above 60V risks permanent damage and violates specification compliance.
Does the U-DFN2020-6 package require special PCB layout considerations for thermal performance?
Yes - the exposed pad (EP) must be soldered to a minimum 25mm² GND copper area using at least 9 thermal vias (0.3mm diameter, spaced ≤1mm apart) connecting to inner-layer ground planes. Failure to implement this reduces θJA from 47.9°C/W to >70°C/W, risking thermal shutdown under 150mA load at +105°C ambient.
Can AP7387Q-33FDCW-7 replace adjustable LDOs in existing designs without circuit modification?
No - AP7387Q-33FDCW-7 provides only fixed 3.3V output. It lacks feedback (FB) or adjust (ADJ) pins, so it cannot substitute for adjustable regulators like LM317 or AP2204 without removing external resistor dividers and verifying output voltage tolerance matches system requirements.
Is the 2μA quiescent current guaranteed over the full −40°C to +125°C temperature range?
No - the 2μA value is specified at TA = 25°C and VIN = 12V (no load). At −40°C, IQ drops to ~1.5μA; at +125°C, it rises to ≤5μA per Electrical Characteristics table. All values remain well within automotive standby budget limits (<10μA).
AP7387Q-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):
- 60V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.6V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 5 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (1kHz)
- Control Features:
- -
- 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:
- U-DFN2020-6 (Type C)
AP7387Q-33FDCW-7 FAQ
1.How can I place an order for AP7387Q-33FDCW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7387Q-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 AP7387Q-33FDCW-7 reliable?
The price and inventory of AP7387Q-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 AP7387Q-33FDCW-7 is usually 5 days.
3.What payment methods are accepted for AP7387Q-33FDCW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7387Q-33FDCW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7387Q-33FDCW-7?
AP7387Q-33FDCW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7387Q-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 AP7387Q-33FDCW-7?
For technical support, including AP7387Q-33FDCW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7387Q-33FDCW-7 requirements.
6.How does Aetrix verify that AP7387Q-33FDCW-7 is sourced from the original manufacturer or authorized distributors?
All AP7387Q-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 AP7387Q-33FDCW-7 meets industry standards.
7.What is the process for return or replacement of AP7387Q-33FDCW-7?
All AP7387Q-33FDCW-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7387Q-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 AP7387Q-33FDCW-7 part is unused and in its original packaging.
Return procedure for AP7387Q-33FDCW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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