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Diodes Incorporated AP7387-36W5-7
- Part No.:
- AP7387-36W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP7387-36W5-7.pdf
- Description:
- LDO CMOS LOWCURR SOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:2,578
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Product details
Overview
AP7387-36W5-7 from Diodes Incorporated is a wide-input (5–60V), 3.6V fixed-output, 150mA ultra-low-dropout linear regulator in SOT25 package, featuring 700mV dropout at 100mA, 2μA quiescent current, and 70dB PSRR at 1kHz - deployed in EV battery management systems for stable MCU power under high-voltage transients.
For engineers reviewing the AP7387-36W5-7 datasheet, AP7387-36W5-7 pinout, AP7387-36W5-7 application, or AP7387-36W5-7 equivalent, this page delivers verified electrical specs, thermal performance data, package-specific layout guidance, and real-world use cases for high-reliability automotive and industrial LDO selection.
Technical Context
The AP7387 integrates a precision voltage reference, error amplifier, and internal PMOS pass transistor to deliver regulated 3.6V output across 5–60V input range. Its fast transient response is enabled by low-output-impedance architecture and optimized internal compensation.
Protection functions include current limiting (250mA typ.), thermal shutdown (+150°C), and short-circuit protection - all implemented with analog circuitry independent of external components. The device operates over –40°C to +125°C junction temperature with no external feedback network required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 60V - supports direct connection to 12V/24V/48V battery rails without pre-regulation. |
| Output Voltage | 3.6V ±2% - tight tolerance enables reliable powering of 3.3V-tolerant MCUs with margin. |
| Max Output Current | 150mA - sufficient for low-power microcontrollers, sensors, and logic in space-constrained designs. |
| Dropout Voltage | 700mV @ 100mA - allows regulation down to VIN = 4.3V while maintaining 3.6V output. |
| Quiescent Current | 2μA typ. - enables multi-year operation in battery-powered smoke detectors and remote sensors. |
| PSRR | 70dB @ 1kHz - suppresses switching noise from upstream DC/DC converters in mixed-power systems. |
| Thermal Shutdown | +150°C with +30°C hysteresis - prevents latch-up during sustained overload or poor PCB heatsinking. |
Pinout & Package
SOT25 package (3.0mm × 2.8mm × 1.3mm) with exposed thermal pad; requires minimum 2.4mm × 0.95mm copper area connected to GND for θJA = 150°C/W performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply pin - connect 1μF ceramic capacitor directly adjacent to minimize high-frequency noise coupling. |
| 2 | GND | Power ground reference - tie to large PCB ground plane; shares internal connection with exposed pad. |
| 3 | VOUT | Regulated 3.6V output - place 10μF X7R ceramic capacitor within 2mm for stability and transient response. |
| 4 | NC | No internal connection - recommended to connect to GND for enhanced thermal conduction and EMI reduction. |
| 5 | NC | No internal connection - recommended to connect to GND for enhanced thermal conduction and EMI reduction. |
| EP | Exposed Pad | Internally tied to GND - must be soldered to ≥100mm² copper pour for thermal dissipation and low-impedance grounding. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range (5–60V) | Eliminates need for external buck pre-regulator in 48V EV auxiliary power domains. |
| Ultra-low IQ (2μA) | Extends shelf life and operational runtime in always-on battery-backed security and sensor nodes. |
| High PSRR (70dB @ 1kHz) | Maintains clean 3.6V rail despite ripple from noisy 12V/48V DC/DC converters in automotive ECUs. |
| Fast load transient response | Limiting output voltage deviation to <50mV during 10–150mA step changes - critical for real-time MCU clock stability. |
| Integrated protections | Current limit (250mA), thermal shutdown (+150°C), and short-circuit protection reduce BOM count and system-level fault handling complexity. |
Applications
| EV Battery Monitoring Unit | Smart Smoke Detector |
|---|---|
|
Use Scenario: Powering 32-bit ARM Cortex-M0+ MCU and CAN transceiver in high-voltage battery pack monitoring module. IC Role / Device Role / Timing Role: Primary 3.6V LDO supplying core logic and interface peripherals from 48V battery bus. Use Value: 60V max input withstands load-dump transients; 2μA IQ extends service interval between battery replacements. |
Use Scenario: Long-life standalone optical smoke sensor with integrated CO detection and wireless reporting. IC Role / Device Role / Timing Role: Single-point 3.6V regulator for ultra-low-power MCU, sensor ASIC, and RF transmitter. Use Value: 700mV dropout enables >10-year operation on two AA cells; ±2% accuracy ensures consistent ADC reference stability. |
| Industrial PLC I/O Module | Home Appliance Control Board |
|
Use Scenario: Isolated digital input conditioning and status LED driver in DIN-rail mounted controller. IC Role / Device Role / Timing Role: Local 3.6V supply for optocoupler biasing, level-shifting logic, and status indicator ICs. Use Value: 150mA output supports multiple parallel loads; 70dB PSRR rejects noise from nearby 24V solenoid drivers. |
Use Scenario: Main control board in smart refrigerator with display, touch panel, and compressor inverter logic. IC Role / Device Role / Timing Role: Secondary 3.6V rail for microcontroller, EEPROM, and real-time clock subsystem. Use Value: Thermal shutdown prevents failure during ambient temperature spikes in enclosed cabinet environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-IQ, wide-input LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7381-36W5-7 | Lower max input (40V), higher IQ (3.5μA), same 3.6V/150mA output and SOT25 package. | Limited to 24V/36V systems; unsuitable for 48V EV battery monitoring where 60V rating is mandatory. | Select only if input never exceeds 40V and cost sensitivity outweighs headroom requirement. |
| TN8136W5 | Same 60V input, 3.6V/150mA output, but 5μA IQ and 900mV dropout @ 100mA; SOT25-compatible footprint. | Higher dropout reduces usable input range; higher IQ cuts battery life in always-on applications by ~2.5×. | Acceptable for non-battery applications with ample thermal margin and lower cost targets. |
Compared with AP7381-36W5-7 and TN8136W5, the AP7387-36W5-7 uniquely combines 60V input tolerance, 2μA IQ, and 700mV dropout - making it the only option qualified for long-duration, high-voltage battery monitoring where both reliability and energy efficiency are non-negotiable.
Availability
AP7387-36W5-7 is available at Aetrix Electronics and suitable for EV battery management systems, smoke detector design, industrial PLC modules, and home appliance control boards requiring stable component supply across extended product lifecycles.
Supply support for AP7387-36W5-7 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, computing, and consumer markets.
The AP7387 belongs to Diodes' high-voltage LDO family engineered specifically for battery-powered and automotive auxiliary power systems demanding wide VIN range, ultra-low IQ, and robust protection.
FAQ
What is the maximum allowable input voltage for AP7387-36W5-7?
The absolute maximum input voltage is 80V, but the recommended operating range is 5V to 60V per datasheet Section 5. Operation beyond 60V risks exceeding thermal limits under load and violates specified safe operating area conditions. Sustained 60V input is supported only with adequate PCB copper area on the exposed pad.
Can AP7387-36W5-7 replace a 3.3V LDO in an existing design?
No - AP7387-36W5-7 provides a fixed 3.6V output and is not pin-compatible or functionally interchangeable with 3.3V regulators. Output voltage is laser-trimmed during manufacturing and cannot be adjusted. A redesign using AP7387-33W5-7 would be required for 3.3V operation.
Is the exposed pad on the SOT25 package electrically connected?
Yes - the exposed pad (EP) is internally connected to GND. It must be soldered to a dedicated PCB copper area tied to the system ground plane to achieve rated thermal resistance (θJA = 150°C/W) and ensure reliable operation at full 150mA load.
Does AP7387-36W5-7 require external capacitors?
Yes - a 1μF ceramic capacitor is required between VIN and GND, and a minimum 10μF X7R/X5R ceramic capacitor is required between VOUT and GND. These are mandatory for stability, transient response, and PSRR performance; omitting either causes oscillation or excessive output ripple.
AP7387-36W5-7 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):
- 60V
- Voltage - Output (Min/Fixed):
- 3.6V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.35V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 4 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Current Limit
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AP7387-36W5-7 FAQ
1.How can I place an order for AP7387-36W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7387-36W5-7 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 AP7387-36W5-7 reliable?
The price and inventory of AP7387-36W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7387-36W5-7 is usually 5 days.
3.What payment methods are accepted for AP7387-36W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7387-36W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7387-36W5-7?
AP7387-36W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7387-36W5-7 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 AP7387-36W5-7?
For technical support, including AP7387-36W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7387-36W5-7 requirements.
6.How does Aetrix verify that AP7387-36W5-7 is sourced from the original manufacturer or authorized distributors?
All AP7387-36W5-7 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 AP7387-36W5-7 meets industry standards.
7.What is the process for return or replacement of AP7387-36W5-7?
All AP7387-36W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7387-36W5-7, 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 AP7387-36W5-7 part is unused and in its original packaging.
Return procedure for AP7387-36W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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