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Diodes Incorporated AP7387-36YR-13
- Part No.:
- AP7387-36YR-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP7387-36YR-13.pdf
- Description:
- LDO CMOS LOWCURR SOT89 T&R 2.5K
- Quantity:
- Payment:
- Shipping:
Inventory:4,686
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Product details
Overview
AP7387-36YR-13 from Diodes Incorporated is a wide-input (5–60V), 3.6V fixed-output, 150mA ultra-low-dropout linear regulator in SOT89-3 package with 700mV dropout at 100mA, 2μA quiescent current, and 70dB PSRR at 1kHz-designed for battery-powered smoke detectors and EV battery management systems where high input voltage tolerance and low standby power are critical.
For engineers reviewing the AP7387-36YR-13 datasheet, AP7387-36YR-13 pinout, AP7387-36YR-13 application, or AP7387-36YR-13 equivalent, key selection criteria include dropout voltage under 150mA load, thermal resistance of 79°C/W in SOT89-R package, ±2% output accuracy, fast line/load transient response, and compatibility with 10μF ceramic output capacitance.
Technical Context
The AP7387-36YR-13 integrates a precision voltage reference, error amplifier, and current-limit circuit to deliver stable 3.6V output across 5–60V input range while maintaining regulation during rapid input or load transients. Its internal thermal shutdown triggers at +150°C with +30°C hysteresis, and short-circuit protection clamps output current to ~250mA.
This SOT89-R variant features an exposed pad connected internally to GND, enabling 79°C/W θJA on JEDEC-standard board-significantly lower than standard SOT89 (165°C/W)-due to optimized thermal path via the EP pad and recommended large copper area connection to ground.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 60V - supports direct connection to 48V industrial rails or EV battery stacks without pre-regulation. |
| Output Voltage | 3.6V ±2% - ensures reliable MCU core or sensor biasing within tight tolerance across temperature and load. |
| Max Output Current | 150mA - sufficient for low-power microcontrollers, analog sensors, or RF modules in space-constrained designs. |
| Dropout Voltage | 1100mV @ 150mA - enables operation down to 4.7V input while sustaining 3.6V output in brownout conditions. |
| Quiescent Current | 2μA typ. - extends battery life in always-on smoke detectors or remote IoT sensors for years on primary cells. |
| PSRR | 70dB @ 1kHz - suppresses switching noise from adjacent DC/DC converters feeding shared input rails. |
| Thermal Resistance θJA | 79°C/W - achieved via SOT89-R exposed pad; allows 150mA continuous output at +85°C ambient with minimal derating. |
Pinout & Package
SOT89-3 (AP7387-XXYR-13) package with exposed thermal pad (EP), 3-pin configuration, RoHS-compliant matte tin plating, moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input voltage supply | Accepts 5–60V unregulated input; requires 1μF ceramic decoupling capacitor placed adjacent to pin. |
| 2 (GND) | Ground reference | Primary return path for regulator and load; must be tied to PCB ground plane with low-impedance trace. |
| 3 (VOUT) | Regulated output | Delivers stable 3.6V; requires 10μF X7R/X5R ceramic capacitor mounted directly between VOUT and GND. |
| EP | Exposed thermal pad | Internally connected to GND; must be soldered to large copper pour for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range (5–60V) | Eliminates need for external pre-regulator in 24V/48V industrial or automotive battery systems. |
| Ultra-low IQ (2μA) | Reduces standby power loss to <10μW at 5V input-critical for decade-long battery life in safety sensors. |
| Fast transient response | Stabilizes within 2ms after 10–100mA load step-preserves logic-level integrity for real-time microcontroller operation. |
| Integrated protections | Combines current limit (~250mA), thermal shutdown (+150°C), and short-circuit protection in single die-no external components required. |
| High PSRR (70dB @ 1kHz) | Attenuates ripple from upstream switching supplies, enabling clean analog sensor or ADC reference voltage generation. |
Applications
| Smoke Detector Power Supply | EV Battery Monitoring Node |
|---|---|
|
Use Scenario: Primary power regulation for electrochemical CO/smoke sensors and low-power MCU in residential fire alarms. IC Role / Device Role / Timing Role: Ultra-low-IQ LDO providing stable 3.6V bias to sensor front-end and sleep-mode MCU core. Use Value: 2μA quiescent current enables >10-year operation on two AA alkaline cells without replacement. |
Use Scenario: Local voltage regulation for cell-voltage monitoring ICs and isolated CAN transceivers in 400V EV battery packs. IC Role / Device Role / Timing Role: Input-tolerant LDO stepping down tapped battery rail (e.g., 48V) to 3.6V for analog front-end and digital logic. Use Value: 60V max input rating avoids external TVS/clamping; 79°C/W θJA sustains 150mA at elevated under-hood temperatures. |
| Industrial Sensor Node | Home Appliance Control Board |
|
Use Scenario: Powering wireless sensor modules (BLE/Zigbee) in factory-floor condition monitors with 24V DC supply. IC Role / Device Role / Timing Role: Primary LDO delivering noise-immune 3.6V to RF SoC and precision ADC in noisy industrial environments. Use Value: 70dB PSRR rejects 1MHz switching noise from nearby PLC power supplies, preserving RF receive sensitivity. |
Use Scenario: Regulating MCU, display driver, and touch controller supply in smart washing machines with variable AC/DC input. IC Role / Device Role / Timing Role: Fixed-output LDO converting rectified 36V DC bus to 3.6V for embedded control subsystem. Use Value: Dropout of 1100mV at 150mA ensures uninterrupted operation during brownouts common in household grid fluctuations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-quiescent-current, wide-input LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-3602E/MB | 45V max input, 2.5μA IQ, 600mV dropout @ 100mA, SOT23-3 package (θJA = 248.5°C/W) | Limited to 45V input; unsuitable for 48V+ battery systems; higher thermal resistance restricts 150mA use above +40°C ambient | Select only for cost-sensitive, low-power (<50mA), sub-45V applications where PCB space is constrained to SOT23. |
| TN8203-36 | 60V max input, 3.5μA IQ, 800mV dropout @ 100mA, SOT89-3 (θJA = 165°C/W), no EP pad | Lacks exposed pad-thermal performance insufficient for sustained 150mA at +85°C; PSRR not specified beyond 100Hz | Acceptable only for intermittent-load applications (<50mA avg.) or when board layout cannot accommodate EP grounding. |
Compared with MCP1703T-3602E/MB and TN8203-36, the AP7387-36YR-13 uniquely combines 60V input, 2μA IQ, 79°C/W thermal resistance, and 70dB PSRR in a production-ready SOT89-R package-making it the sole option for thermally demanding, always-on 48V+ systems requiring long-term reliability.
Availability
AP7387-36YR-13 is available at Aetrix Electronics and suitable for battery-powered equipment, EV battery management systems, and home appliance control boards requiring stable component supply with guaranteed long-term manufacturability and automotive-grade process consistency.
Supply support for AP7387-36YR-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 manufacturer specializing in discrete, analog, and mixed-signal solutions for industrial, automotive, computing, and consumer markets.
The AP7387 belongs to Diodes' high-reliability ULDO family, engineered specifically for battery-backed and wide-input industrial power management-emphasizing ultra-low IQ, robust thermal design, and seamless integration into safety-critical sensor nodes.
FAQ
What is the minimum input voltage required for regulation at 3.6V output?
The AP7387-36YR-13 maintains regulation when VIN ≥ VOUT + VDROP. At 100mA load, typical dropout is 700mV, so minimum input is 4.3V; at 150mA, it rises to 4.7V due to 1100mV typical dropout. Below these thresholds, output voltage drops linearly with input.
Can the exposed pad (EP) be left floating in PCB layout?
No-the EP is internally connected to GND and must be soldered to a dedicated PCB copper pour tied to system ground. Leaving it unconnected degrades thermal performance by >50%, increases junction temperature, and risks premature thermal shutdown under 100mA+ loads.
Is AP7387-36YR-13 qualified for automotive applications?
No-this variant is industrial-grade. The automotive-qualified version is AP7387Q, which undergoes AEC-Q100 stress testing and ships in different packaging with distinct part numbering (e.g., AP7387Q-36YR-13). Electrical specs match, but qualification and traceability differ.
What output capacitor type and value are mandatory for stability?
A minimum 10μF X7R or X5R ceramic capacitor is mandatory between VOUT and GND. Tantalum or aluminum electrolytics are not recommended. Capacitance must be placed within 3mm of the pins; values >10μF improve transient response but do not affect basic stability.
AP7387-36YR-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):
- 3.6V
- 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-89R-3
AP7387-36YR-13 FAQ
1.How can I place an order for AP7387-36YR-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7387-36YR-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 AP7387-36YR-13 reliable?
The price and inventory of AP7387-36YR-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7387-36YR-13 is usually 5 days.
3.What payment methods are accepted for AP7387-36YR-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7387-36YR-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7387-36YR-13?
AP7387-36YR-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7387-36YR-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 AP7387-36YR-13?
For technical support, including AP7387-36YR-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7387-36YR-13 requirements.
6.How does Aetrix verify that AP7387-36YR-13 is sourced from the original manufacturer or authorized distributors?
All AP7387-36YR-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 AP7387-36YR-13 meets industry standards.
7.What is the process for return or replacement of AP7387-36YR-13?
All AP7387-36YR-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7387-36YR-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 AP7387-36YR-13 part is unused and in its original packaging.
Return procedure for AP7387-36YR-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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