My Inquiry
My Account
Diodes Incorporated AP7387-36FDC-7
- Part No.:
- AP7387-36FDC-7
- Manufacturer:
- Diodes Incorporated
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
AP7387-36FDC-7.pdf
- Description:
- LDO CMOS LowCurr U-DFN2020-6 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:5,970
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AP7387-36FDC-7 from Diodes Incorporated is a wide-input (5–60V), 3.6V fixed-output, 150mA ultra-low-dropout linear regulator in U-DFN2020-6 (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 AP7387-36FDC-7 datasheet, AP7387-36FDC-7 pinout, AP7387-36FDC-7 application, or AP7387-36FDC-7 equivalent, key selection criteria include input voltage range up to 60V, thermal shutdown at +150°C, PSRR of 70dB @ 1kHz, and compatibility with 10μF ceramic output capacitance for transient stability.
Technical Context
The AP7387-36FDC-7 integrates a precision voltage reference, error amplifier, and current-limit circuit with thermal shutdown and short-circuit protection. Its architecture supports fast line/load transient response due to low output impedance and optimized internal compensation.
It operates across –40°C to +125°C junction temperature with 48°C/W θJA in U-DFN2020-6 (Type C), enabled by an exposed pad internally tied to GND and requiring PCB copper area for thermal dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 60V - supports direct connection to 12V/24V/48V industrial and automotive rails without pre-regulation. |
| Output Voltage | 3.6V ±2% - tightly regulated supply for 3.3V-tolerant microcontrollers and sensors with margin for aging and temperature drift. |
| Max Output Current | 150mA - sufficient for low-power MCU cores, RF transceivers, and analog sensor signal chains. |
| Dropout Voltage | 700mV @ 100mA (typ.) - enables stable 3.6V output from 4.3V input, critical for battery end-of-discharge operation. |
| 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 vehicle electronics. |
| Thermal Shutdown | +150°C threshold with +30°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
AP7387-36FDC-7 uses the U-DFN2020-6 (Type C) package (2.0mm × 2.0mm × 0.6mm), featuring an exposed thermal pad (EP) internally connected to GND. PCB layout requires large copper area under EP, connected to system ground for optimal thermal performance (θJA = 48°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input power terminal; accepts 5–60V; requires 1μF ceramic decoupling capacitor placed adjacent to pin. |
| 2, 5 | GND | Ground reference for internal circuitry and error amplifier; connects to EP for thermal conduction. |
| 3, 4 | NC | No-connect terminals; recommended to tie to GND on PCB to maximize thermal copper area and reduce EMI susceptibility. |
| 6 | VOUT | Regulated 3.6V output; drives load up to 150mA; requires 10μF X7R/X5R ceramic capacitor within 2mm of pin. |
| EP | Exposed Pad | Internally bonded to GND; must be soldered to ≥100mm² 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 control and EV battery monitoring nodes. |
| Ultra-Low IQ (2μA) | Enables >10-year battery life in maintenance-free smoke detectors using two AA cells (3V nominal). |
| High PSRR (70dB @ 1kHz) | Maintains clean 3.6V rail when powered from switching converter outputs with <10mV ripple. |
| Fast Transient Response | Settles within 200μs after 10–100mA load step, preserving ADC reference stability in sensor data acquisition. |
| Integrated Protections | Current limit (250mA), thermal shutdown (+150°C), and short-circuit protection enable robust operation in unattended equipment. |
Applications
| Smoke Detector Power Supply | EV Battery Cell Monitor |
|---|---|
|
Use Scenario: Standalone photoelectric smoke alarm powered by two alkaline AA batteries (1.5V × 2), operating over 10+ years with periodic self-test cycles. IC Role / Device Role / Timing Role: Primary 3.6V LDO supplying MCU, optical sensor, and piezo alarm driver; maintains regulation down to 2.8V battery voltage. Use Value: 2μA quiescent current and 700mV dropout extend usable battery life beyond industry-standard 10-year requirement. |
Use Scenario: Isolated cell voltage measurement module in 400V EV battery pack, mounted directly on cell interconnect board with limited PCB area. IC Role / Device Role / Timing Role: Local 3.6V supply for 16-bit ADC and isolated CAN transceiver; rejects ripple from nearby high-current switching circuits. Use Value: 70dB PSRR and 48°C/W thermal resistance allow reliable operation in confined, thermally challenging locations near battery cells. |
| Industrial Sensor Node | Home Appliance MCU Supply |
|
Use Scenario: Wireless temperature/humidity sensor node in factory environment, powered from 24V DC distribution rail with significant conducted noise. IC Role / Device Role / Timing Role: Post-regulator delivering clean 3.6V to low-power ARM Cortex-M0+ MCU and BLE radio; filters 24V rail noise before sensitive analog front-end. Use Value: 5–60V input range accommodates brownout and surge conditions on industrial 24V lines without external protection circuitry. |
Use Scenario: Control board in smart refrigerator, where main 12V rail powers compressor and lighting, and auxiliary 3.6V powers display MCU and touch controller. IC Role / Device Role / Timing Role: Secondary LDO providing stable 3.6V from noisy 12V SMPS output; handles rapid load changes during display backlight dimming. Use Value: Fast load transient response (<200μs) prevents MCU reset during dynamic display updates and user interface interactions. |
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 (3mm × 3mm). | Requires larger PCB footprint and lacks NC pins for thermal enhancement; no 3.6V option. | Select if AEC-Q100 qualification is mandatory and 3.3V output suffices. |
| MCP1826T-3602E/DB | 3.6V fixed, 300mA, 50μA IQ, 16V max input, SOT-223 package; higher IQ and lower VIN limit. | Unsuitable for 48V systems or multi-year battery life; better for cost-sensitive 12V consumer appliances. | Select only for 12V-only designs where 50μA IQ is acceptable and thermal budget allows SOT-223. |
Compared with TPS7B8733QKVURQ1 and MCP1826T-3602E/DB, AP7387-36FDC-7 uniquely combines 2μA IQ, 60V input, 3.6V output, and 2.0mm × 2.0mm U-DFN2020-6 packaging-making it optimal for space-constrained, long-life, high-voltage industrial and automotive sensing nodes.
Availability
AP7387-36FDC-7 is available at Aetrix Electronics and suitable for battery-powered equipment, smoke detectors and sensors, EV and HEV battery management systems, and micro-controller applications requiring stable component supply across extended product lifecycles.
Supply support for AP7387-36FDC-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, automotive, and consumer markets.
The AP7387 series belongs to Diodes' ultra-low-IQ, wide-input LDO product line-designed specifically for energy-constrained, high-voltage environments such as battery monitoring, safety-critical sensors, and legacy rail compatibility.
FAQ
What is the minimum input voltage required for regulation at 3.6V output?
The AP7387-36FDC-7 requires VIN ≥ VOUT + VDROP. With typical dropout of 700mV at 100mA, minimum input is 4.3V. At 150mA, dropout rises to 1100mV, so minimum input becomes 4.7V. Below these thresholds, output voltage drops linearly with input.
Can the NC pins (3 and 4) be left floating on the PCB?
No. Pins 3 and 4 are not internally connected but must be tied to GND on the PCB. This maximizes copper area for thermal dissipation and reduces EMI susceptibility-critical for stable operation in noisy industrial environments per datasheet recommendation.
Is an input capacitor mandatory, and what type is recommended?
Yes-a 1μF ceramic capacitor is mandatory between VIN and GND. X7R or X5R dielectric is recommended for stable capacitance over temperature and bias. Place it within 2mm of the VIN and GND pins to ensure input stability and suppress high-frequency noise from upstream sources.
Does the AP7387-36FDC-7 support adjustable output voltage?
No. The AP7387-36FDC-7 is a fixed 3.6V output device. Diodes does not offer an adjustable version in the AP7387 family. For adjustable output, consider the AP7380 series (e.g., AP7380-ADJ), which shares similar input range and protection features but uses external resistive feedback.
AP7387-36FDC-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)
AP7387-36FDC-7 FAQ
1.How can I place an order for AP7387-36FDC-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7387-36FDC-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 AP7387-36FDC-7 reliable?
The price and inventory of AP7387-36FDC-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7387-36FDC-7 is usually 5 days.
3.What payment methods are accepted for AP7387-36FDC-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7387-36FDC-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7387-36FDC-7?
AP7387-36FDC-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7387-36FDC-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 AP7387-36FDC-7?
For technical support, including AP7387-36FDC-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7387-36FDC-7 requirements.
6.How does Aetrix verify that AP7387-36FDC-7 is sourced from the original manufacturer or authorized distributors?
All AP7387-36FDC-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 AP7387-36FDC-7 meets industry standards.
7.What is the process for return or replacement of AP7387-36FDC-7?
All AP7387-36FDC-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP7387-36FDC-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 AP7387-36FDC-7 part is unused and in its original packaging.
Return procedure for AP7387-36FDC-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP7387-36FDC-7 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
