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Diodes Incorporated AP7387-50Y-13
- Part No.:
- AP7387-50Y-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP7387-50Y-13.pdf
- Description:
- LDO CMOS LOWCURR SOT89 T&R 2.5K
- Quantity:
- Payment:
- Shipping:
Inventory:3,825
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Product details
Overview
AP7387-50Y-13 from Diodes Incorporated is a 5.0V fixed-output, wide-input (5–60V), 150mA ultra-low-dropout linear regulator in SOT89 package, featuring 700mV dropout at 100mA, 2μA quiescent current, and 70dB PSRR at 1kHz-designed for battery-powered smoke detectors and EV battery management systems where input voltage varies widely and standby power must be minimized.
For engineers reviewing the AP7387-50Y-13 datasheet, AP7387-50Y-13 pinout, AP7387-50Y-13 application, or AP7387-50Y-13 equivalent, this page delivers verified electrical specs, thermal performance data, SOT89 terminal mapping, and real-world use cases in safety-critical low-power systems.
Technical Context
The AP7387-50Y-13 integrates a precision voltage reference, error amplifier, and current-limit circuit with thermal shutdown and short-circuit protection. Its architecture enables fast line/load transient response due to high-loop-gain compensation and low output impedance.
It operates across –40°C to +85°C ambient, supports 1μF input and 10μF ceramic output capacitors (X7R/X5R), and maintains ±2% output accuracy over load, line, and temperature-enabling stable 5V rail generation from unregulated 12–48V battery sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±2% - ensures compatibility with 5V microcontrollers and sensors without external feedback. |
| Input Voltage Range | 5V to 60V - supports direct connection to 12V/24V/48V automotive and industrial battery rails. |
| Max Output Current | 150mA - sufficient to power MCU cores, RF transceivers, and analog sensor front-ends. |
| Dropout Voltage | 700mV @ 100mA (typ.) - enables regulation down to VIN = 5.7V while maintaining 5V output. |
| Quiescent Current | 2μA (typ.) - extends battery life in always-on smoke detectors and remote sensors. |
| PSRR | 70dB @ 1kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Thermal Shutdown | 150°C threshold with 30°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
SOT89-3 package (AP7387-50Y-13) features a thermally enhanced leadframe with exposed pad internally connected to GND; recommended PCB layout uses ≥100 mm² copper area tied to GND for θJA = 165°C/W operation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply pin - accepts 5–60V; requires 1μF ceramic decoupling capacitor placed within 2mm. |
| 2 | GND | Power ground reference - connects to internal die substrate and exposed pad; must tie to system ground plane. |
| 3 | VOUT | Regulated 5.0V output - drives load up to 150mA; requires 10μF X7R/X5R ceramic capacitor placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range (5–60V) | Eliminates need for pre-regulation stages when powering from variable battery sources like 12V lead-acid or 48V Li-ion packs. |
| Ultra-low IQ (2μA) | Reduces standby power to <10μW at 5V - critical for >10-year battery life in wireless smoke alarms. |
| Fast transient response | Settles within 2ms after 10–100mA load step - maintains MCU core voltage stability during burst-mode sensing. |
| Integrated protection | Current limit (250mA), thermal shutdown (150°C), and short-circuit protection prevent field failures without external components. |
| High PSRR (70dB @ 1kHz) | Rejects ripple from noisy buck converters - preserves ADC reference integrity in battery monitor ICs. |
Applications
| Smoke Detector Power Supply | EV Battery Monitor Rail |
|---|---|
Use Scenario: Standby and alarm-mode operation of photoelectric smoke detectors powered by 9V alkaline or 3.7V Li-ion with boost converter. IC Role / Device Role / Timing Role: Primary 5V LDO supplying MCU, buzzer driver, and optical sensor ASIC. Use Value: 2μA quiescent current enables >10-year shelf life; 60V input withstands boost converter overshoot during cold cranking. |
Use Scenario: Local 5V rail generation for cell voltage monitoring ICs in 48V EV battery packs. IC Role / Device Role / Timing Role: Post-regulator downstream of 12V system rail, delivering clean 5V to precision ADCs and CAN transceivers. Use Value: 70dB PSRR rejects switching noise from main DC/DC; ±2% accuracy ensures consistent ADC reference scaling across temperature. |
| Industrial Sensor Node | Home Appliance Control Board |
Use Scenario: Remote wireless temperature/humidity node powered by 2xAA batteries or energy harvesting. IC Role / Device Role / Timing Role: Low-power 5V regulator enabling sleep/wake cycles for BLE SoC and analog front-end. Use Value: 700mV dropout allows operation down to 5.7V input - extends usable battery range by ~15% versus standard LDOs. |
Use Scenario: Secondary 5V supply for display controller and touch interface on washing machine control board. IC Role / Device Role / Timing Role: Isolated 5V rail decoupled from noisy motor drive section. Use Value: Thermal shutdown (150°C) prevents latch-up during cabinet overheating; SOT89 package provides robust thermal margin under sealed enclosure conditions. |
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 |
|---|---|---|---|
| AP7361-50SA-7 | Same 5V output, but max input 40V and IQ = 3.5μA; SOT23-3 package with higher θJA (248.5°C/W). | Limited to ≤40V systems; less suitable for 48V EV BMS where transient spikes exceed 40V. | Choose only if board space is constrained and input never exceeds 40V. |
| TPS7B8750QKVURQ1 | Automotive-grade 5V LDO, 60V input, but IQ = 18μA and dropout = 1.3V @ 150mA - significantly higher power loss. | Qualified to AEC-Q100 Grade 1; required for functional-safety-compliant automotive modules. | Select when ISO 26262 ASIL-B compliance is mandatory - not for cost-sensitive consumer or industrial use. |
Compared with AP7387-50Y-13, AP7361-50SA-7 trades input voltage headroom for smaller footprint, while TPS7B8750QKVURQ1 adds automotive qualification at the cost of 9× higher quiescent current and reduced efficiency under load.
Availability
AP7387-50Y-13 is available at Aetrix Electronics and suitable for battery-powered equipment, smoke detectors and sensors, and EV/HEV battery management systems requiring stable component supply with long-term manufacturability and RoHS/Green compliance.
Supply support for AP7387-50Y-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 semiconductor company specializing in discrete, analog, and mixed-signal devices, with design centers in Asia, Europe, and the U.S., and manufacturing in China, Taiwan, and the Philippines.
The AP7387 belongs to Diodes' high-voltage LDO family targeting industrial and automotive power management, designed specifically to replace inefficient three-terminal regulators in battery-fed systems demanding ultra-low standby current and wide VIN tolerance.
FAQ
What is the maximum allowable input voltage for continuous operation?
The AP7387-50Y-13 supports continuous operation up to 60V input per datasheet Recommended Operating Conditions. Absolute maximum rating is 80V, but operation above 60V risks exceeding thermal limits or violating safe operating area - sustained use above 60V is not recommended.
Can the AP7387-50Y-13 be used without an output capacitor?
No. An output capacitor of at least 10μF ceramic (X7R/X5R) is mandatory for stability, as confirmed in the Application Information section. Omitting it causes oscillation and output voltage collapse under load, per functional testing in DS44416 Rev.6 Section 10.
Is the SOT89 package thermally adequate for 150mA at 60V input?
At 60V input and 5V output, power dissipation is (60−5)V × 0.15A = 8.25W. With θJA = 165°C/W, junction rise would exceed 1360°C - physically impossible. Realistic use requires VIN ≤ 12V for full 150mA; thermal design must assume worst-case ΔT = (VIN−5V)×0.15A×165°C/W.
Does the AP7387-50Y-13 include reverse-polarity protection?
No. The device lacks internal reverse-voltage protection; applying negative voltage to VIN relative to GND violates Absolute Maximum Rating (–0.3V), risking permanent damage. External series diode or MOSFET protection is required in systems prone to battery reversal.
AP7387-50Y-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):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.35V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 4 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (1kHz)
- 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-89-3
AP7387-50Y-13 FAQ
1.How can I place an order for AP7387-50Y-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7387-50Y-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 AP7387-50Y-13 reliable?
The price and inventory of AP7387-50Y-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7387-50Y-13 is usually 5 days.
3.What payment methods are accepted for AP7387-50Y-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7387-50Y-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7387-50Y-13?
AP7387-50Y-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7387-50Y-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 AP7387-50Y-13?
For technical support, including AP7387-50Y-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7387-50Y-13 requirements.
6.How does Aetrix verify that AP7387-50Y-13 is sourced from the original manufacturer or authorized distributors?
All AP7387-50Y-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 AP7387-50Y-13 meets industry standards.
7.What is the process for return or replacement of AP7387-50Y-13?
All AP7387-50Y-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7387-50Y-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 AP7387-50Y-13 part is unused and in its original packaging.
Return procedure for AP7387-50Y-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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