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Diodes Incorporated AP7387-33FDCR-7
- Part No.:
- AP7387-33FDCR-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
AP7387-33FDCR-7.pdf
- Description:
- LDO CMOS LowCurr U-DFN2020-6 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:3,015
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Product details
Overview
AP7387-33FDCR-7 from Diodes Incorporated is a 3.3V fixed-output, wide-input (5–60V), 150mA ultra-low-dropout linear regulator in U-DFN2020-6R (Type C) package. It delivers ±2% output accuracy, 700mV dropout at 100mA, and 2μA quiescent current-enabling reliable power for battery-backed sensors and EV battery monitoring circuits where input voltage varies widely and standby power must be minimized.
For engineers reviewing the AP7387-33FDCR-7 datasheet, AP7387-33FDCR-7 pinout, AP7387-33FDCR-7 application, or AP7387-33FDCR-7 equivalent, key selection criteria include its 60V max input rating, thermal shutdown threshold at +150°C, PSRR of 70dB @ 1kHz, and compatibility with 10μF ceramic output capacitance for transient stability in automotive and industrial edge nodes.
Technical Context
The AP7387-33FDCR-7 integrates a precision voltage reference, error amplifier, and current-limit circuit to maintain regulation across 5–60V input while delivering up to 150mA. Its fast line/load transient response is enabled by internal compensation optimized for 10μF ceramic output capacitors.
Thermal protection activates at +150°C junction temperature with +30°C hysteresis, and short-circuit protection clamps output current to ~250mA. The U-DFN2020-6R package provides θJA = 48°C/W and includes an exposed pad internally tied to GND for enhanced thermal dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2% - ensures stable MCU core or sensor bias without external feedback. |
| Input Voltage Range | 5V to 60V - supports direct connection to 12V/24V/48V battery rails and unregulated industrial supplies. |
| Max Output Current | 150mA - sufficient for low-power microcontrollers, analog sensors, and logic interfaces. |
| Dropout Voltage | 700mV @ 100mA (typ.) - enables regulation down to VIN = 4.0V for 3.3V output, critical in brownout conditions. |
| Quiescent Current | 2μA (typ.) - extends battery life in always-on smoke detectors and remote IoT endpoints. |
| PSRR | 70dB @ 1kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Thermal Shutdown | +150°C activation with +30°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
| Package | U-DFN2020-6R (Type C), 2.0mm × 2.0mm × 0.6mm - enables high-density layout with low thermal resistance (θJA = 48°C/W). |
Pinout & Package
U-DFN2020-6R (Type C) package features a 2.0mm × 2.0mm body, 0.6mm height, and exposed thermal pad (EP) internally connected to GND. Recommended PCB layout uses ≥10mm² copper area under EP, soldered to GND plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply pin; accepts 5–60V; requires 1μF ceramic decoupling placed adjacent to pin. |
| 2, 5 | GND | Ground reference for regulation and thermal path; both pins must connect to low-impedance ground plane. |
| 3, 4 | NC | No internal connection; recommended to tie to GND for improved thermal conduction and EMI shielding. |
| 6 | VOUT | Regulated 3.3V output; requires 10μF X7R/X5R ceramic capacitor placed within 2mm of pin. |
| EP | Exposed Pad | Internally connected to GND; must be soldered to ≥10mm² PCB copper area for thermal dissipation and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range (5–60V) | Eliminates need for pre-regulation in automotive and industrial battery systems with variable bus voltages. |
| Ultra-low IQ (2μA) | Reduces standby power loss to <6.6μW at 3.3V output-critical for multi-year battery operation. |
| High PSRR (70dB @ 1kHz) | Preserves signal integrity in noise-sensitive analog front-ends powered from noisy switcher outputs. |
| Fast transient response | Stabilizes within <200μs after 10–100mA load steps-maintains MCU clock stability during burst-mode sensing. |
| Integrated protections | Combines current limit (~250mA), thermal shutdown (+150°C), and short-circuit protection in single die-no external components needed. |
| RoHS/Green compliant | Lead-free, halogen-free, antimony-free construction meets automotive and industrial environmental mandates. |
Applications
| Battery-Powered Smoke Detectors | EV Battery Cell Monitoring Units |
|---|---|
|
Use Scenario: Continuous 24/7 operation on primary lithium thionyl chloride (LiSOCl₂) cells with 3.6V nominal and up to 60V open-circuit voltage during charging phases. IC Role / Device Role / Timing Role: Primary 3.3V supply for CO sensor ASIC, MCU, and RF transceiver-regulates despite wide input swing and ultra-low quiescent demand. Use Value: 2μA IQ extends 10-year battery life; 60V input rating avoids external TVS/clamping; ±2% accuracy ensures consistent ADC reference voltage. |
Use Scenario: Powering isolated ADCs and couplers in high-voltage battery packs (up to 900V total) where local 3.3V rails are derived from tapped cell groups. IC Role / Device Role / Timing Role: Local post-regulator for measurement ICs located near individual 3.6V Li-ion cells-rejects ripple from nearby DC/DC converters and handles load transients from sampling bursts. Use Value: 70dB PSRR minimizes noise coupling into 16-bit ADC references; 48°C/W θJA allows compact placement on small sensor PCBs without heatsinks. |
| Industrial PLC I/O Module Sensors | Home Appliance Control Boards |
|
Use Scenario: Powering analog temperature/humidity sensors and digital isolators in DIN-rail mounted controllers exposed to 24VDC industrial buses with ±15% tolerance and surge events. IC Role / Device Role / Timing Role: Secondary LDO supplying isolated communication interfaces (RS-485, CAN PHY) and sensor signal chains-must survive input transients and maintain regulation during brownouts. Use Value: 700mV dropout enables operation down to 4.0V input-maintains 3.3V output during 24V bus dips to 12V; thermal shutdown prevents latch-up during field wiring faults. |
Use Scenario: Providing clean 3.3V for touch controller, display driver, and Wi-Fi SoC in smart refrigerators and washing machines with 12V/24V internal power distribution. IC Role / Device Role / Timing Role: Final-stage regulator decoupling noisy SMPS outputs-ensures glitch-free touchscreen response and stable wireless connectivity during motor startup surges. Use Value: Fast load transient response (<200μs) prevents brownout resets during display backlight ramp-up; U-DFN2020-6R footprint saves space on crowded control board real estate. |
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 |
|---|---|---|---|
| TPS7B8233QPWPRQ1 | Automotive-grade AEC-Q100 qualified; 3.3V ±1%; 2.5μA IQ; 40V max input; SOT-23-5 package. | Limited to 40V input-unsuitable for 48V+ battery monitoring; higher thermal resistance (θJA = 248°C/W) requires larger PCB area. | Select when AEC-Q100 qualification is mandatory and input stays ≤40V; avoid for >48V industrial/EV use cases. |
| MCP1703T-3302E/MB | 3.3V ±1%; 2.5μA IQ; 24V max input; SOT-23-3 package; no current limit or thermal shutdown. | Lower max input restricts use to 12V/24V systems only; lacks integrated overcurrent/thermal protection-requires external circuitry. | Choose for cost-sensitive 24V consumer applications where protection is handled upstream; not suitable for unattended industrial deployments. |
Compared with TPS7B8233QPWPRQ1 and MCP1703T-3302E/MB, the AP7387-33FDCR-7 uniquely combines 60V input capability, integrated protections, and 48°C/W thermal performance in a 2mm² footprint-making it the only option for compact, robust 48V+ battery-powered designs requiring zero external protection components.
Availability
AP7387-33FDCR-7 is available at Aetrix Electronics and suitable for battery-powered equipment, EV battery management systems, and industrial PLC I/O modules requiring stable component supply with long-term lifecycle assurance.
Supply support for AP7387-33FDCR-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 industrial, automotive, computing, and consumer markets.
The AP7387 belongs to Diodes' high-reliability wide-input LDO family, engineered specifically for harsh-environment power regulation in battery management, safety-critical sensors, and industrial control systems.
FAQ
What is the minimum input voltage required for regulation at 3.3V output?
The AP7387-33FDCR-7 maintains regulation when VIN ≥ VOUT + VDROP. With typical dropout of 700mV at 100mA, minimum input is 4.0V. At full 150mA load, dropout rises to 1100mV, requiring VIN ≥ 4.4V. Input below 5V is not recommended per absolute maximum ratings.
Can the NC pins (3 and 4) be left floating on the U-DFN2020-6R package?
No-pins 3 and 4 are not internally connected but must be soldered to GND on the PCB. This maximizes thermal conduction through the package sides and improves EMI immunity. Leaving them floating degrades thermal performance and may cause instability under high ambient temperatures.
Is an input capacitor mandatory, and what type is recommended?
Yes-a 1μF ceramic capacitor (X5R or X7R) is mandatory between VIN and GND, placed within 2mm of the pins. It suppresses high-frequency noise and prevents oscillation. Larger values improve noise rejection but do not affect stability; tantalum or electrolytic types are not recommended due to ESR and reliability concerns.
Does the AP7387-33FDCR-7 support adjustable output voltage via external resistors?
No-the AP7387-33FDCR-7 is a fixed 3.3V output device with internal feedback divider. It does not support external resistor networks for voltage adjustment. For adjustable variants, Diodes offers the AP7386 series, which uses different pinout and requires external resistors.
AP7387-33FDCR-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):
- 3.3V
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- U-DFN2020-6 (Type C)
AP7387-33FDCR-7 FAQ
1.How can I place an order for AP7387-33FDCR-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7387-33FDCR-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 AP7387-33FDCR-7 reliable?
The price and inventory of AP7387-33FDCR-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7387-33FDCR-7 is usually 5 days.
3.What payment methods are accepted for AP7387-33FDCR-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7387-33FDCR-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7387-33FDCR-7?
AP7387-33FDCR-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7387-33FDCR-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 AP7387-33FDCR-7?
For technical support, including AP7387-33FDCR-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7387-33FDCR-7 requirements.
6.How does Aetrix verify that AP7387-33FDCR-7 is sourced from the original manufacturer or authorized distributors?
All AP7387-33FDCR-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 AP7387-33FDCR-7 meets industry standards.
7.What is the process for return or replacement of AP7387-33FDCR-7?
All AP7387-33FDCR-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7387-33FDCR-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 AP7387-33FDCR-7 part is unused and in its original packaging.
Return procedure for AP7387-33FDCR-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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