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Diodes Incorporated AP7387Q-33Y-13
- Part No.:
- AP7387Q-33Y-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP7387Q-33Y-13.pdf
- Description:
- IC REG LINEAR 3.3V 150MA SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,003
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Product details
Overview
AP7387Q-33Y-13 from Diodes Incorporated is an AEC-Q100 qualified automotive-grade ultra-low-dropout linear regulator delivering 3.3V fixed output at up to 150mA, with 5V–60V input range, 700mV dropout at 100mA, 2μA quiescent current, and 70dB PSRR at 1kHz - designed for powering MCUs and CAN/LIN transceivers in body control modules and EV battery management systems.
For engineers reviewing the AP7387Q-33Y-13 datasheet, AP7387Q-33Y-13 pinout, AP7387Q-33Y-13 application, or AP7387Q-33Y-13 equivalent, key selection criteria include wide-input voltage tolerance, thermal shutdown behavior, output accuracy (±2%), fast load transient response, and SOT89 package thermal performance (θJA = 78.6°C/W).
Technical Context
The AP7387Q-33Y-13 integrates a precision voltage reference, error amplifier, and internal resistor network to maintain 3.3V ±2% output across -40°C to +125°C ambient. Its current-limit circuit triggers at 250mA and combines with thermal shutdown (TSD = +150°C, hysteresis = +30°C) for robust fault protection.
It achieves high PSRR (70dB @1kHz) and excellent line regulation (0.01%/V) via low-noise bandgap reference and optimized error amplifier loop dynamics, enabling stable operation under rapid VIN transients (e.g., load dump) and dynamic load steps from 1mA to 150mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2% - ensures compatibility with 3.3V logic interfaces without external feedback components. |
| Input Voltage Range | 5V to 60V - supports direct connection to automotive 12V/24V/48V battery rails including load-dump transients. |
| Max Output Current | 150mA - sufficient for low-power MCUs, CAN transceivers, and sensor signal chains in body electronics. |
| Dropout Voltage | 700mV @100mA (typ.) - enables regulation down to VIN = 4.0V while maintaining 3.3V output in cold-crank conditions. |
| Quiescent Current | 2μA (typ.) - minimizes standby power loss in always-on automotive modules like door controllers and LIN nodes. |
| PSRR | 70dB @1kHz - suppresses ripple from noisy switching supplies feeding the LDO input, preserving analog/sensor accuracy. |
| Thermal Shutdown | +150°C junction temperature with +30°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
AP7387Q-33Y-13 is packaged in SOT89 - a thermally enhanced 3-pin surface-mount package with exposed tab for GND connection and improved heat dissipation (θJA = 78.6°C/W). The tab must be soldered to a large PCB copper area connected to system ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input supply connection | Accepts 5–60V DC; requires ≥1µF ceramic decoupling capacitor placed adjacent to pin to suppress high-frequency noise. |
| 2 (GND) | Ground reference | Primary ground return path; connects internally to exposed tab - must be tied to low-impedance system ground plane. |
| 3 (VOUT) | Regulated output | Delivers stable 3.3V ±2%; requires ≥10µF X7R/X5R ceramic output capacitor placed within 2mm of VOUT/GND pins for stability. |
| Tab (GND) | Thermal & electrical ground | Exposed metal pad - not electrically isolated; must be soldered to ≥100mm² copper pour connected to GND for thermal relief and EMI reduction. |
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 requirements for serial production. |
| Ultra-low IQ | 2μA typical quiescent current - enables >10-year battery life in always-on vehicle modules powered by 12V lead-acid or LiFePO₄ backup cells. |
| Fast transient response | Load step recovery <200µs (10mA→100mA); line step recovery <4ms (5.3V→12V) - maintains MCU core voltage during ignition transients. |
| Integrated protection | Current limit (250mA), short-circuit foldback, and thermal shutdown with hysteresis - eliminates need for external fault-handling circuitry. |
| High PSRR & low noise | 70dB @1kHz, <30µVRMS output noise - preserves signal integrity in ADC references and RF front-end biasing applications. |
Applications
| Body Control Module (BCM) | Automotive Head Unit |
|---|---|
|
Use Scenario: Powering microcontroller, LIN transceiver, and door lock actuator drivers in centralized vehicle body electronics. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying MCU core and peripheral I/O, with direct connection to 12V battery rail. Use Value: Maintains regulation during cold-crank (VIN ≥4.0V) and load-dump events (VIN ≤60V), eliminating need for upstream TVS or pre-regulator. |
Use Scenario: Supplying audio DSP, display controller, and USB interface ICs in infotainment head units. IC Role / Device Role / Timing Role: Low-noise post-regulator cleaning switched-mode supply output before sensitive analog/digital circuits. Use Value: 70dB PSRR suppresses 100kHz–1MHz switching noise from buck converters, preventing audible artifacts and display flicker. |
| EV Battery Management System | Transmission Control Unit (TCU) |
|
Use Scenario: Biasing cell monitoring ICs, isolation amplifiers, and CAN communication interfaces in high-voltage battery packs. IC Role / Device Role / Timing Role: Isolated 3.3V supply referenced to pack mid-point or local ground, tolerant of common-mode voltage shifts. Use Value: 60V max input withstands transients from contactor switching and regenerative braking surges without derating. |
Use Scenario: Powering gear-position sensors, solenoid drivers, and real-time safety MCU in automatic transmission control modules. IC Role / Device Role / Timing Role: Safety-critical 3.3V rail with thermal shutdown and current limiting to prevent latch-up during solenoid short faults. Use Value: Thermal hysteresis (+30°C) ensures reliable restart after overtemperature events without manual reset or system reboot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73333PQDBVRQ1 | 3.3V, 300mA, 225mV dropout @150mA, 65dB PSRR @1kHz, SOT-23-5 | Higher current capability but lower PSRR and narrower input range (1.4–5.5V) | Preferred only when >150mA load or ultra-low dropout is required; unsuitable for direct 12V/24V battery input. |
| MAX6675AATA+T | 3.3V, 150mA, 350mV dropout @100mA, 60dB PSRR @1kHz, TDFN-6 | Lower dropout and smaller footprint, but lacks AEC-Q100 qualification and automotive PPAP support | Appropriate for non-safety-critical industrial designs where automotive certification is not mandated. |
Compared with TLV73333PQDBVRQ1 and MAX6675AATA+T, the AP7387Q-33Y-13 uniquely combines 60V input tolerance, AEC-Q100 qualification, and 70dB PSRR - making it the only drop-in solution for 3.3V MCU power in automotive body and powertrain modules requiring full OEM compliance.
Availability
AP7387Q-33Y-13 is available at Aetrix Electronics and suitable for automotive body control modules, EV battery management systems, and transmission control units requiring stable component supply under extended temperature and high-reliability conditions.
Supply support for AP7387Q-33Y-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 AP7387Q series belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for direct battery-rail regulation in harsh environments - emphasizing wide-input tolerance, ultra-low IQ, and AEC-Q100-compliant reliability.
FAQ
What is the minimum input voltage required for regulation at 3.3V output?
The AP7387Q-33Y-13 maintains regulation when VIN ≥ (VOUT + VDROP). With typical dropout of 700mV at 100mA, the minimum functional input is 4.0V. At 150mA, dropout rises to 1100mV, requiring VIN ≥ 4.4V. This supports cold-crank operation in 12V systems where battery voltage may dip to 4.0–4.5V.
Can AP7387Q-33Y-13 be used without an output capacitor?
No - an output capacitor is mandatory for stability. Diodes specifies a minimum of 10µF ceramic (X7R/X5R) placed within 2mm of VOUT and GND pins. Omitting or undersizing COUT causes oscillation, excessive overshoot/undershoot during load transients, and potential thermal runaway under heavy load.
Is the exposed tab on the SOT89 package electrically connected?
Yes - the exposed tab is internally connected to GND and must be soldered to a dedicated PCB copper pour tied to system ground. It serves both thermal conduction (reducing θJA by ~20°C/W) and electrical grounding; floating or isolating the tab degrades thermal performance and may cause instability.
Does AP7387Q-33Y-13 require input capacitance, and what type is recommended?
Yes - a minimum 1µF ceramic capacitor (X7R/X5R) is required between VIN and GND, placed adjacent to the device. This decouples high-frequency noise from upstream supplies and prevents oscillation. Larger values (e.g., 4.7–10µF) improve immunity to fast transients but do not affect basic stability.
AP7387Q-33Y-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-243AA
- 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:
- SOT-89-3
AP7387Q-33Y-13 FAQ
1.How can I place an order for AP7387Q-33Y-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7387Q-33Y-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 AP7387Q-33Y-13 reliable?
The price and inventory of AP7387Q-33Y-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7387Q-33Y-13 is usually 5 days.
3.What payment methods are accepted for AP7387Q-33Y-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7387Q-33Y-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7387Q-33Y-13?
AP7387Q-33Y-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7387Q-33Y-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 AP7387Q-33Y-13?
For technical support, including AP7387Q-33Y-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7387Q-33Y-13 requirements.
6.How does Aetrix verify that AP7387Q-33Y-13 is sourced from the original manufacturer or authorized distributors?
All AP7387Q-33Y-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 AP7387Q-33Y-13 meets industry standards.
7.What is the process for return or replacement of AP7387Q-33Y-13?
All AP7387Q-33Y-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7387Q-33Y-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 AP7387Q-33Y-13 part is unused and in its original packaging.
Return procedure for AP7387Q-33Y-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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