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Diodes Incorporated AP7387-36FDCR-7
- Part No.:
- AP7387-36FDCR-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
AP7387-36FDCR-7.pdf
- Description:
- LDO CMOS LowCurr U-DFN2020-6 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:5,800
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Product details
Overview
AP7387-36FDCR-7 from Diodes Incorporated is a wide-input (5–60V), 3.6V fixed-output, 150mA ultra-low-dropout linear regulator in U-DFN2020-6R (Type C) package. It delivers ±2% output voltage accuracy, 700mV dropout at 100mA, and 2μA quiescent current-enabling long-life operation in battery-powered smoke detectors and EV battery management systems.
For engineers reviewing the AP7387-36FDCR-7 datasheet, AP7387-36FDCR-7 pinout, AP7387-36FDCR-7 application, or AP7387-36FDCR-7 equivalent, key selection criteria include its 60V max input rating, thermal shutdown behavior, PSRR performance at 1kHz, and compatibility with 10μF ceramic output capacitance for transient stability.
Technical Context
The AP7387-36FDCR-7 integrates a precision voltage reference, error amplifier, and current-limit circuit to regulate output under fast line/load transients. Its internal power MOSFET enables dropout as low as 700mV at 100mA while maintaining ±2% output accuracy across temperature and load.
Thermal protection triggers at +150°C junction temperature with +30°C hysteresis; short-circuit and overcurrent protection clamp output at 250mA. The U-DFN2020-6R package provides θJA = 48°C/W and an exposed pad internally connected to GND for enhanced thermal dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 60V - supports direct connection to 48V industrial rails or automotive battery systems without pre-regulation. |
| Output Voltage | 3.6V ±2% - stable supply for 3.3V-tolerant microcontrollers and sensors requiring tight regulation. |
| Max Output Current | 150mA - sufficient for low-power MCU cores, RF modules, and analog sensor signal chains. |
| Dropout Voltage | 700mV @ 100mA (typ.) - enables regulation down to VIN = 4.3V while sustaining full 3.6V output. |
| Quiescent Current | 2μA (typ.) - extends battery life in always-on smoke detectors and remote IoT sensors. |
| PSRR | 70dB @ 1kHz - suppresses ripple from noisy DC-DC converters or alternator supplies in automotive applications. |
| Thermal Shutdown | +150°C threshold with +30°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
AP7387-36FDCR-7 uses the U-DFN2020-6R (Type C) package: 2.0mm × 2.0mm × 0.6mm body with 6 terminals and an exposed thermal pad (EP). The EP is internally connected to GND and must be soldered to a large PCB copper area for optimal thermal performance (θJA = 48°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply pin; accepts 5–60V; requires 1μF ceramic decoupling capacitor placed adjacent to pin. |
| 2, 5 | GND | Ground reference for internal circuitry and output regulation; connects directly to EP for thermal conduction. |
| 3, 4 | NC | No-connect pins; recommended to tie to GND on PCB to maximize thermal copper area and reduce impedance. |
| 6 | VOUT | Regulated 3.6V output; requires 10μF X7R/X5R ceramic capacitor placed within 2mm of pin for stability. |
| EP | Exposed Pad | Internally tied to GND; must be soldered to ≥25mm² copper pour for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range (5–60V) | Eliminates need for external buck pre-regulator in 24V/48V industrial or HEV battery monitoring circuits. |
| Ultra-low IQ (2μA) | Enables >10-year battery life in maintenance-free smoke detectors operating from CR123A cells. |
| Fast transient response | Stabilizes within 2ms after 10–150mA load step-critical for MCU wake-up events in low-power sensor nodes. |
| 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) | Maintains clean 3.6V rail when powered from switching converter outputs with <10mV ripple. |
Applications
| Smoke Detector Power Supply | EV Battery Cell Monitor |
|---|---|
|
Use Scenario: Standalone photoelectric smoke alarm powered by two CR123A lithium batteries (6–9V), operating continuously for 10+ years. IC Role / Device Role / Timing Role: Primary 3.6V LDO supplying MCU, optical sensor, and piezo alarm driver. Use Value: 2μA quiescent current minimizes self-discharge; 60V input rating accommodates battery test pulses up to 9V without derating. |
Use Scenario: Isolated cell-voltage measurement module in 400V EV battery pack, powered from auxiliary 12V rail. IC Role / Device Role / Timing Role: Local 3.6V regulator for ADC, isolation interface, and fault-monitoring logic. Use Value: 70dB PSRR rejects noise from nearby DC-DC converters; thermal shutdown protects against fault-induced overheating in confined enclosure. |
| Industrial Sensor Node | Home Appliance MCU Rail |
|
Use Scenario: Wireless temperature/humidity sensor mounted in HVAC ducts, powered from 24V PoE-derived supply. IC Role / Device Role / Timing Role: Post-regulator delivering stable 3.6V to ultra-low-power BLE SoC and analog front-end. Use Value: 700mV dropout allows operation down to 4.3V input-ensuring functionality during brownout conditions on 24V bus. |
Use Scenario: Control board in smart refrigerator using 3.3V-tolerant MCU, display driver, and door sensor interface. IC Role / Device Role / Timing Role: Main 3.6V supply for MCU core and peripherals, derived from 12V system rail. Use Value: ±2% output accuracy ensures reliable reset behavior and ADC reference stability across -40°C to +85°C ambient. |
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 | SOT25 package (θJA = 150°C/W); higher thermal resistance; same electrical specs. | Less suitable for space-constrained designs; requires larger PCB area for thermal management. | Select when legacy SOT25 footprint compatibility is required and thermal margin permits. |
| TPS7B8733QDDARQ1 | Automotive-grade AEC-Q100 qualified; 3.3V output only; 150mA; 2.5μA IQ; 40V max input. | Validated for automotive BMS but lacks 60V input capability and 3.6V option. | Choose only for automotive programs requiring AEC-Q100 certification and 3.3V output. |
Compared with AP7381-36W5-7, AP7387-36FDCR-7 offers 3× lower thermal resistance (48 vs. 150°C/W) in half the footprint-critical for high-density battery monitors. Versus TPS7B8733QDDARQ1, it supports 60V input and 3.6V output but lacks AEC-Q100 qualification.
Availability
AP7387-36FDCR-7 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 continuity.
Supply support for AP7387-36FDCR-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 ICs for power management, signal integrity, and connectivity applications.
The AP7387 belongs to Diodes' wide-input LDO family, designed specifically for industrial, automotive, and battery-powered systems demanding high input voltage tolerance, ultra-low quiescent current, and robust protection features.
FAQ
What is the minimum input voltage required for AP7387-36FDCR-7 to maintain regulation?
The AP7387-36FDCR-7 requires VIN ≥ VOUT + VDROP to sustain regulation. With a typical dropout of 700mV at 100mA, the minimum functional input is 4.3V. At full 150mA load, dropout rises to 1100mV, requiring VIN ≥ 4.7V. Below these thresholds, output voltage drops linearly with input.
Can AP7387-36FDCR-7 operate without an output capacitor?
No. A minimum 10μF ceramic output capacitor (X7R/X5R) is mandatory for stability and transient response. Omitting it causes oscillation and potential device failure. The capacitor must be placed within 2mm of VOUT and GND pins, with low-ESR characteristics verified per datasheet Figure 1.
Is the exposed pad (EP) electrically isolated or grounded?
The exposed pad is internally connected to GND and must be soldered to a PCB copper area tied to the system ground plane. This connection serves dual purposes: thermal dissipation (reducing θJA to 48°C/W) and EMI suppression. Leaving EP floating violates thermal design requirements and risks premature thermal shutdown.
Does AP7387-36FDCR-7 support adjustable output voltage?
No. AP7387-36FDCR-7 is a fixed 3.6V output device. Diodes does not offer an adjustable version in the AP7387 family. For variable output, consider the AP7380 series (adjustable, 5–60V input), which shares the same protection architecture but uses an external resistor divider for setpoint control.
AP7387-36FDCR-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-UDFN Exposed Pad
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- U-DFN2020-6 (Type C)
AP7387-36FDCR-7 FAQ
1.How can I place an order for AP7387-36FDCR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7387-36FDCR-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 AP7387-36FDCR-7 reliable?
The price and inventory of AP7387-36FDCR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7387-36FDCR-7 is usually 5 days.
3.What payment methods are accepted for AP7387-36FDCR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7387-36FDCR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7387-36FDCR-7?
AP7387-36FDCR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7387-36FDCR-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 AP7387-36FDCR-7?
For technical support, including AP7387-36FDCR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7387-36FDCR-7 requirements.
6.How does Aetrix verify that AP7387-36FDCR-7 is sourced from the original manufacturer or authorized distributors?
All AP7387-36FDCR-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 AP7387-36FDCR-7 meets industry standards.
7.What is the process for return or replacement of AP7387-36FDCR-7?
All AP7387-36FDCR-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7387-36FDCR-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 AP7387-36FDCR-7 part is unused and in its original packaging.
Return procedure for AP7387-36FDCR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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