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Diodes Incorporated AP7387Q-36FDCW-7
- Part No.:
- AP7387Q-36FDCW-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
AP7387Q-36FDCW-7.pdf
- Description:
- IC REG LINEAR 3.6V 150MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,404
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Product details
Overview
AP7387Q-36FDCW-7 from Diodes Incorporated is an automotive-grade ultra-low-dropout linear regulator delivering a fixed 3.6V output at up to 150mA, with 60V maximum input voltage, 700mV dropout at 100mA, and 2μA quiescent current. It integrates thermal shutdown, short-circuit protection, and current limiting, and is qualified per AEC-Q100 for use in body control modules and EV battery management systems.
For engineers reviewing the AP7387Q-36FDCW-7 datasheet, AP7387Q-36FDCW-7 pinout, AP7387Q-36FDCW-7 application, or AP7387Q-36FDCW-7 equivalent, key selection criteria include wide-input-voltage capability (5–60V), ±2% output accuracy, high PSRR (70dB @1kHz), fast load transient response, and IATF 16949-manufactured reliability for automotive power rails.
Technical Context
The AP7387Q-36FDCW-7 employs a precision bandgap reference and error amplifier to regulate output against line and load variations, with internal current-limit circuitry set to ~250mA and thermal shutdown triggered at +150°C with +30°C hysteresis. Its architecture supports stable operation with only 1μF input and 10μF ceramic output capacitance.
Designed for harsh automotive environments, it features 4kV HBM ESD rating, operates across –40°C to +125°C ambient, and achieves θJA = 47.9°C/W in its U-DFN2020-6 (SWP) package - enabled by an exposed thermal pad connected to PCB copper for dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.6V ±2% - ensures stable MCU core or CAN transceiver supply without external feedback resistors. |
| Input Voltage Range | 5V to 60V - supports direct connection to 12V/24V/48V automotive batteries including load-dump transients. |
| 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 = 4.3V while maintaining 3.6V output, critical during cold-crank conditions. |
| Quiescent Current | 2μA (typ.) - minimizes standby power loss in always-on vehicle subsystems like door modules or alarm controllers. |
| PSRR | 70dB @1kHz - suppresses ripple from noisy alternator or switching DC-DC stages upstream of the LDO. |
| Thermal Shutdown | +150°C activation with +30°C hysteresis - protects against sustained overloads or poor PCB thermal design without latch-up. |
Pinout & Package
AP7387Q-36FDCW-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 supports automated optical inspection (AOI) and offers low thermal resistance (θJA = 47.9°C/W) when mounted on ≥200mm² GND-connected copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Regulated 3.6V output - connect directly to load; place 10µF ceramic capacitor within 2mm for stability and transient suppression. |
| 2 | GND | Analog/digital ground reference - tie to main system GND plane; route with low-inductance path to minimize noise coupling. |
| 3 | VIN | Main input (5–60V) - decouple with 1µF ceramic capacitor placed adjacent to pin; use wide trace to handle peak surge currents. |
| 4 | NC | No internal connection - recommended to connect to GND for enhanced thermal conduction and EMI shielding. |
| 5 | NC | No internal connection - recommended to connect to GND for enhanced thermal conduction and EMI shielding. |
| 6 | GND | Secondary ground terminal - electrically identical to Pin 2; improves thermal spreading and reduces ground loop impedance. |
| EP | Exposed Pad | Thermal interface only - must be soldered to ≥200mm² GND copper pour; not an electrical ground node unless explicitly tied externally. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C), PPAP-capable, manufactured in IATF 16949-certified facilities - meets OEM Tier-1 sourcing requirements. |
| Ultra-low IQ | 2μA typical quiescent current - enables <10μW standby power draw, essential for battery-backed modules with multi-year sleep cycles. |
| Fast transient response | Sub-200µs recovery from 10mA ↔ 150mA load steps - maintains voltage integrity during MCU wake-up bursts or CAN frame transmission spikes. |
| Integrated protection | Current limit (~250mA), thermal shutdown (+150°C), and short-circuit foldback - eliminates need for external fault-handling circuitry. |
| High PSRR & low noise | 70dB @1kHz, <50µVRMS output noise - preserves signal integrity in analog sensor front-ends and ADC reference supplies. |
Applications
| Body Control Module (BCM) | EV Battery Management Unit (BMU) |
|---|---|
|
Use Scenario: Powering 3.3V/3.6V microcontroller, door lock actuators, and interior lighting drivers in centralized vehicle body electronics. IC Role / Device Role / Timing Role: Primary 3.6V LDO supplying MCU VDD and peripheral logic under wide-battery-voltage conditions (6–16V nominal, up to 60V during load dump). Use Value: Maintains regulation during cold-crank (down to 5V input) and load-dump events (up to 60V), eliminating need for upstream TVS or pre-regulator stages. |
Use Scenario: Providing clean, stable bias to cell monitoring ICs, temperature sensors, and isolation gate drivers in high-voltage battery packs (400–800V nominal). IC Role / Device Role / Timing Role: Isolated secondary-side LDO generating 3.6V for isolated communication interfaces (e.g., SPI isolators) and analog front-end circuitry. Use Value: Enables direct derivation of 3.6V rail from intermediate 12V auxiliary supply without additional DC-DC conversion, reducing BOM count and EMI sources. |
| CAN/LIN Transceiver Supply | Automotive Head Unit Core Logic |
|
Use Scenario: Powering ISO 11898-2/3 compliant CAN transceivers and LIN 2.x physical layer ICs in gateway and domain controllers. IC Role / Device Role / Timing Role: Dedicated low-noise 3.6V supply for transceiver VCC, decoupled from noisy digital domains to ensure robust bus signaling. Use Value: High PSRR (70dB @1kHz) rejects switching noise from nearby DC-DC converters, preventing bit errors and bus arbitration failures. |
Use Scenario: Supplying 3.6V to audio DSPs, display controllers, and touch interface MCUs in infotainment head units with extended temperature range requirements. IC Role / Device Role / Timing Role: Low-quiescent-current LDO supporting always-on functions (e.g., Bluetooth wake-on-ring, voice trigger) while minimizing parasitic drain. Use Value: 2μA IQ enables >10-year battery backup life in real-time clock and security co-processor subsystems. |
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 |
|---|---|---|---|
| TLV73336PQDBVRQ1 | 3.6V fixed, 300mA output, 225mV dropout @150mA, 4.5μA IQ, SOT-23-5 package | Higher current and lower dropout, but larger θJA (120°C/W) and no wettable flanks - less suitable for high-density automotive PCBs requiring AOI. | Select when higher output current or tighter dropout is required; verify thermal margin in compact layouts. |
| MAX25210ATPA/V+T | 3.6V fixed, 200mA, 300mV dropout @150mA, 2.5μA IQ, 2mm × 2mm TDFN-6 with EP | Similar footprint and thermal performance, but requires external 10nF bypass capacitor on EN pin for stability - adds layout complexity. | Prefer when integrated enable functionality with precise threshold is needed; confirm EN pin routing constraints. |
Compared with TLV73336PQDBVRQ1 and MAX25210ATPA/V+T, AP7387Q-36FDCW-7 offers superior thermal resistance (47.9°C/W), wettable flank leads for reliable AOI, and simpler external component count - making it optimal for space-constrained, high-reliability automotive modules where manufacturability and thermal headroom are critical.
Availability
AP7387Q-36FDCW-7 is available at Aetrix Electronics and suitable for automotive body control modules, EV battery management systems, and infotainment head units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AP7387Q-36FDCW-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 consumer markets.
The AP7387Q series belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for demanding vehicle subsystems requiring wide-input-voltage operation, ultra-low IQ, and AEC-Q100 compliance without external compensation.
FAQ
What is the minimum input voltage required for regulation at 3.6V output?
The AP7387Q-36FDCW-7 maintains regulation down to VIN = VOUT + VDROP. With a typical dropout of 700mV at 100mA, the minimum functional input is 4.3V. At 150mA, dropout rises to 1100mV, requiring VIN ≥ 4.7V. This enables operation during automotive cold-crank events where battery voltage dips to 5V.
Can the exposed pad (EP) be used as a functional ground connection?
No - the exposed pad is a thermal interface only, not an electrical node. It must be soldered to a GND-connected copper pour for heat dissipation but should not serve as the primary ground return path. Pins 2 and 6 are the designated GND terminals; using EP as ground risks violating internal isolation and degrading thermal performance.
Is an external output capacitor mandatory, and what type is recommended?
Yes - a minimum 1µF ceramic capacitor is mandatory for stability. Diodes specifies X7R or X5R dielectrics due to their stable capacitance vs. DC bias and temperature. For improved transient response in automotive applications, 10µF is recommended and must be placed within 2mm of VOUT and GND pins to minimize ESL.
How does the current-limit protection behave during a short-circuit event?
When VOUT is shorted to GND or load current exceeds ~250mA, the AP7387Q-36FDCW-7 enters constant-current foldback mode, clamping output current to prevent thermal runaway. Unlike latch-off devices, it remains active and self-recovers once the fault clears - enabling robust operation in intermittent short scenarios common in wiring harnesses.
AP7387Q-36FDCW-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):
- 3.6V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.6V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 5 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- 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-36FDCW-7 FAQ
1.How can I place an order for AP7387Q-36FDCW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7387Q-36FDCW-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-36FDCW-7 reliable?
The price and inventory of AP7387Q-36FDCW-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-36FDCW-7 is usually 5 days.
3.What payment methods are accepted for AP7387Q-36FDCW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7387Q-36FDCW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7387Q-36FDCW-7?
AP7387Q-36FDCW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7387Q-36FDCW-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-36FDCW-7?
For technical support, including AP7387Q-36FDCW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7387Q-36FDCW-7 requirements.
6.How does Aetrix verify that AP7387Q-36FDCW-7 is sourced from the original manufacturer or authorized distributors?
All AP7387Q-36FDCW-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-36FDCW-7 meets industry standards.
7.What is the process for return or replacement of AP7387Q-36FDCW-7?
All AP7387Q-36FDCW-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7387Q-36FDCW-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-36FDCW-7 part is unused and in its original packaging.
Return procedure for AP7387Q-36FDCW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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