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Diodes Incorporated AP7387-36Y-13
- Part No.:
- AP7387-36Y-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP7387-36Y-13.pdf
- Description:
- LDO CMOS LOWCURR SOT89 T&R 2.5K
- Quantity:
- Payment:
- Shipping:
Inventory:2,493
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Product details
Overview
AP7387-36Y-13 from Diodes Incorporated is a 3.6V 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 high input voltage tolerance and low standby power are critical.
For engineers reviewing the AP7387-36Y-13 datasheet, AP7387-36Y-13 pinout, AP7387-36Y-13 application, or AP7387-36Y-13 equivalent, key selection criteria include dropout performance under 150mA load, thermal resistance (165°C/W for SOT89-3), output accuracy (±2%), and compatibility with 10μF ceramic output capacitance in space-constrained industrial sensing nodes.
Technical Context
The AP7387-36Y-13 integrates a precision voltage reference, error amplifier, and current-limit circuit with thermal shutdown and short-circuit protection. Its architecture delivers fast line/load transient response due to optimized internal compensation and low output impedance.
It operates across –40°C to +85°C ambient temperature with junction limit of +125°C, supports 1μF input and 10μF output ceramic capacitors (X7R/X5R), and maintains ±2% output voltage accuracy over full load and temperature range without external feedback components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.6V ±2% - eliminates need for external resistor divider; ensures stable MCU core supply in automotive-grade sensors. |
| Input Voltage Range | 5V to 60V - enables direct connection to 12V/24V/48V battery rails without pre-regulation in EV BMS and industrial controllers. |
| Max Output Current | 150mA - sufficient to power low-power microcontrollers, analog sensors, and RF transceivers in standalone IoT endpoints. |
| Dropout Voltage | 700mV @ 100mA (typ.) - allows regulation down to VIN = 4.3V while maintaining 3.6V output, critical for brownout resilience in battery discharge cycles. |
| Quiescent Current | 2μA (typ.) - extends battery life in always-on smoke detectors and remote environmental monitors operating for >10 years on primary cells. |
| PSRR | 70dB @ 1kHz - suppresses switching noise from adjacent DC-DC converters, preserving signal integrity in analog sensor front-ends. |
| Thermal Shutdown | Triggers at +150°C with +30°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking in enclosed enclosures. |
Pinout & Package
SOT89-3 package (JEDEC TO-243AA) with exposed tab thermally connected to GND; footprint requires ≥15mm² copper pour under tab for optimal thermal dissipation per θJA = 165°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input voltage supply | Accepts 5–60V unregulated input; requires 1μF ceramic decoupling capacitor placed within 2mm of pin to suppress high-frequency noise. |
| 2 (GND) | Ground reference | Primary return path for input/output currents; must connect directly to large ground plane to minimize IR drop and improve PSRR. |
| 3 (VOUT) | Regulated output | Delivers stable 3.6V ±2%; requires 10μF X7R ceramic capacitor placed adjacent to pin to ensure stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input voltage range | 5V–60V operation enables single-part support across 12V, 24V, and 48V industrial and automotive battery systems without redesign. |
| Ultra-low quiescent current | 2μA typical draw allows >10-year battery life in maintenance-free smoke detectors using CR123A or AA lithium cells. |
| High PSRR at 1kHz | 70dB rejection of ripple from upstream switching regulators preserves ADC reference stability in precision sensor signal chains. |
| Integrated protection | Current limit (~250mA), thermal shutdown (+150°C), and short-circuit protection eliminate need for external fault-handling circuitry. |
| RoHS/Green compliance | Fully lead-free, halogen- and antimony-free construction meets IEC 61249-2-21 and EU RoHS 3 (2015/863/EU) requirements for global deployment. |
Applications
| Smoke Detector Power Supply | EV Battery Monitoring Node |
|---|---|
|
Use Scenario: Primary power regulation for photoelectric/ionization smoke sensors with MCU, buzzer, and wireless transceiver in battery-only residential units. IC Role / Device Role / Timing Role: Main 3.6V LDO supplying MCU core, analog front-end, and sub-GHz RF IC; handles cold cranking dips and long-term shelf drain. Use Value: 2μA IQ extends 2× AA lithium cell life beyond 10 years; 60V input withstands accidental 48V test equipment connection during field service. |
Use Scenario: Local voltage regulation for cell-voltage monitoring ICs and isolated CAN transceivers in high-voltage EV battery packs (up to 800V nominal). IC Role / Device Role / Timing Role: Post-isolation 3.6V rail generator for analog sensing circuitry; interfaces with isolated DC-DC bias supplies feeding AFEs and microcontrollers. Use Value: 700mV dropout enables regulation from 12V auxiliary rail even under high-temperature derating; ±2% accuracy ensures <0.5% cell voltage measurement error. |
| Industrial Sensor Transmitter | Home Appliance Control Module |
|
Use Scenario: Powering 4–20mA loop-powered temperature/pressure transmitters with HART modulation capability in factory automation environments. IC Role / Device Role / Timing Role: Low-noise 3.6V supply for op-amps, ADCs, and digital isolators; rejects noise from 24V loop supply and nearby VFDs. Use Value: 70dB PSRR at 1kHz attenuates 24V supply ripple by 3,160×, preventing HART signal corruption; SOT89 thermal performance sustains 150mA at 70°C ambient. |
Use Scenario: Secondary regulation for microcontroller, display driver, and touch controller in smart washing machines and refrigerators with variable AC/DC input. IC Role / Device Role / Timing Role: Final-stage LDO after bulk DC-DC conversion; provides clean 3.6V for low-power sleep modes and real-time clock backup. Use Value: Thermal shutdown prevents latch-up during motor surge events; 150mA capacity supports simultaneous LCD backlight + Wi-Fi SoC wake-up bursts. |
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 |
|---|---|---|---|
| TPS7B8733QKVURQ1 | Automotive-grade (AEC-Q100), 3.3V fixed, 150mA, 2.5μA IQ, 60V max input, but only available in VSON-8 (3×3mm) with higher θJA (120°C/W). | Requires re-layout for automotive functional-safety designs needing ASIL-B compliance; lacks SOT89 mechanical compatibility. | Select when AEC-Q100 qualification and integrated enable pin are mandatory; avoid if board space or thermal pad constraints favor SOT89. |
| MCP1703T-3602E/MB | 3.6V fixed, 250mA, 1.8μA IQ, 24V max input, SOT23-3 package; no thermal shutdown or current limit. | Limited to 24V systems; unsuitable for EV BMS or 48V industrial inputs requiring 60V tolerance and robust fault protection. | Choose only for cost-sensitive, low-voltage (<24V), non-safety-critical consumer appliances where protection features are externally implemented. |
Compared with TPS7B8733QKVURQ1 and MCP1703T-3602E/MB, the AP7387-36Y-13 uniquely balances 60V input capability, SOT89 thermal performance, integrated protection, and ultra-low IQ in a legacy-compatible through-hole–compatible package-making it optimal for industrial retrofit and battery-system upgrades where footprint and reliability are prioritized over automotive certification.
Availability
AP7387-36Y-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 guaranteed long-term manufacturability and consistent parametric performance.
Supply support for AP7387-36Y-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-reliability wide-input LDO family, engineered specifically for harsh-environment power management in automotive, industrial, and battery-operated safety-critical systems where input voltage variation and ultra-low standby power are dominant constraints.
FAQ
What is the minimum input voltage required for regulation at 3.6V output?
The AP7387-36Y-13 requires VIN ≥ VOUT + VDROP to maintain regulation. With typical dropout of 700mV at 100mA, minimum input is 4.3V. At 150mA, dropout rises to 1100mV, so VIN must be ≥4.7V. Below these thresholds, output voltage drops linearly with input.
Can the AP7387-36Y-13 be used with tantalum output capacitors?
No-tantalum capacitors are not recommended. The AP7387 requires a minimum 10μF ceramic capacitor (X7R or X5R dielectric) for stability. Tantalum caps exhibit higher ESR and aging effects that can cause oscillation or degraded transient response, violating the device's stability criteria per Section 9.1 of DS44416 Rev. 6-2.
Is the exposed pad on the SOT89 package electrically connected?
Yes-the exposed pad is internally connected to GND and must be soldered to a PCB ground plane. It serves as both a thermal conduction path (reducing θJA from 248.5°C/W to 165°C/W) and an electrical ground node; floating or unconnected pads degrade thermal performance and may cause instability.
Does the AP7387-36Y-13 support adjustable output voltage?
No-it is a fixed 3.6V output device. The AP7387 family offers only factory-trimmed fixed outputs (3.0V, 3.3V, 3.6V, 5.0V); no version includes an ADJ pin or external feedback resistors. For adjustable operation, consider Diodes' AP7361 series or similar programmable LDOs.
AP7387-36Y-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-89-3
AP7387-36Y-13 FAQ
1.How can I place an order for AP7387-36Y-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7387-36Y-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 AP7387-36Y-13 reliable?
The price and inventory of AP7387-36Y-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7387-36Y-13 is usually 5 days.
3.What payment methods are accepted for AP7387-36Y-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7387-36Y-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7387-36Y-13?
AP7387-36Y-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7387-36Y-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 AP7387-36Y-13?
For technical support, including AP7387-36Y-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7387-36Y-13 requirements.
6.How does Aetrix verify that AP7387-36Y-13 is sourced from the original manufacturer or authorized distributors?
All AP7387-36Y-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 AP7387-36Y-13 meets industry standards.
7.What is the process for return or replacement of AP7387-36Y-13?
All AP7387-36Y-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7387-36Y-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 AP7387-36Y-13 part is unused and in its original packaging.
Return procedure for AP7387-36Y-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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