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Diodes Incorporated AP7387-33YR-13
- Part No.:
- AP7387-33YR-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP7387-33YR-13.pdf
- Description:
- LDO CMOS LOWCURR SOT89 T&R 2.5K
- Quantity:
- Payment:
- Shipping:
Inventory:4,171
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Product details
Overview
AP7387-33YR-13 from Diodes Incorporated is a wide-input (5–60V), 150mA ultra-low-dropout linear regulator with fixed 3.3V output, 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 AP7387-33YR-13 datasheet, AP7387-33YR-13 pinout, AP7387-33YR-13 application, or AP7387-33YR-13 equivalent, key selection considerations include input voltage range compatibility (up to 60V), thermal performance in SOT89-R package (θJA = 79°C/W), output accuracy (±2%), and fast transient response in safety-critical sensor and automotive subsystems.
Technical Context
The AP7387-33YR-13 integrates a precision voltage reference, error amplifier, and current-limit circuit with thermal shutdown and short-circuit protection-enabling stable regulation under rapid load transients (e.g., 10–150mA step) while maintaining <50mV output deviation. Its architecture supports operation across -40°C to +85°C ambient without external compensation.
It delivers 3.3V ±2% output with line regulation of 0.01%/V and load regulation of 0.015%/mA over full operating conditions, and features an exposed pad (EP) internally tied to GND for enhanced thermal dissipation in the SOT89-R package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 60V - enables direct connection to 12V/24V/48V industrial and automotive battery rails without pre-regulation |
| Output Voltage | 3.3V ±2% - ensures reliable logic-level supply for microcontrollers and sensors requiring tight voltage tolerance |
| Max Output Current | 150mA - sufficient to power low-power MCUs, analog front-ends, and RF modules in compact systems |
| Dropout Voltage | 700mV @ 100mA (typ.) - allows regulation down to VIN = 4.0V while sustaining 3.3V output |
| Quiescent Current | 2μA (typ.) - extends battery life in always-on smoke detectors and remote sensors |
| PSRR | 70dB @ 1kHz - suppresses ripple from noisy DC-DC converters or battery switching transients |
| Thermal Shutdown | +150°C threshold with +30°C hysteresis - provides robust self-protection during overload or poor PCB heatsinking |
Pinout & Package
The AP7387-33YR-13 is housed in a thermally enhanced SOT89-R package (JEDEC TO-243AA), featuring an exposed pad (EP) internally connected to GND for optimal heat transfer to PCB copper. Package dimensions: 4.5mm × 2.5mm × 1.5mm (L×W×H), with 1.5mm lead pitch.
| 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 ground return path; must be connected to large PCB copper area and tied to EP for thermal stability |
| 3 (VOUT) | Regulated output | Delivers stable 3.3V ±2%; requires 10μF X7R/X5R ceramic capacitor directly between VOUT and GND |
| EP (Exposed Pad) | Thermal & electrical ground | Internally connected to GND; must be soldered to ≥25 mm² PCB copper pour for θJA = 79°C/W performance |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range (5–60V) | Eliminates need for external buck pre-regulator in 24V/48V industrial and HEV battery monitoring circuits |
| Ultra-low IQ (2μA) | Reduces standby power to <6.6μW at 3.3V, enabling >10-year battery life in smoke detectors |
| Fast transient response | Controls output deviation to <50mV during 10–150mA load steps-critical for real-time sensor wake-up events |
| Integrated protections | Current limit (250mA), thermal shutdown (+150°C), and short-circuit protection prevent field failures without external components |
| High PSRR (70dB @ 1kHz) | Maintains clean 3.3V rail despite switching noise from adjacent DC-DC converters in mixed-signal PCBs |
Applications
| Smoke Detector Power Supply | EV Battery Cell Monitor |
|---|---|
Use Scenario: Primary regulated supply for electrochemical CO/smoke sensing ICs and wireless alarm transmitters in battery-backed residential units. IC Role / Device Role / Timing Role: Ultra-low-IQ LDO providing stable 3.3V bias to analog sensor front-end and sub-GHz RF transmitter during 10-year standby. Use Value: 2μA quiescent current enables >10-year CR123A battery life; 60V input withstands surge events during AC mains failure and battery recharge transitions. | Use Scenario: Local regulation for isolated cell-voltage measurement ICs and CAN interface controllers in 400V+ EV battery packs. IC Role / Device Role / Timing Role: High-input-voltage LDO powering precision ADCs and digital isolators in distributed BMS slave modules. Use Value: 5–60V input range accepts direct tap from multi-cell strings; ±2% output accuracy ensures <1LSB error in 12-bit cell voltage readings. |
| Industrial PLC Sensor Node | Home Appliance MCU Supply |
Use Scenario: Powering 32-bit ARM Cortex-M microcontrollers and analog signal conditioners in DIN-rail mounted process controllers. IC Role / Device Role / Timing Role: Primary 3.3V rail generator tolerant to 24VDC field bus fluctuations and EFT bursts. Use Value: 70dB PSRR rejects 1kHz switching noise from nearby 24V-to-5V DC-DC; thermal shutdown prevents latch-up during ambient temperature excursions. | Use Scenario: Main logic supply for embedded MCU and touch controller in smart washing machines and refrigerators. IC Role / Device Role / Timing Role: Fixed-output LDO delivering clean 3.3V to noise-sensitive capacitive touch interfaces and motor control peripherals. Use Value: Fast load transient response (<200μs settling) prevents touch ghosting during compressor startup; SOT89-R package enables compact layout with minimal thermal derating. |
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 |
|---|---|---|---|
| AP7381-33YR-13 | Same family; 100mA max output, lower thermal resistance (θJA = 70°C/W in SOT89-R) | Better suited for space-constrained nodes with <100mA load and tighter thermal budgets | Select when load current ≤100mA and PCB copper area is limited-reduces footprint without sacrificing IQ or input range |
| TPS7B8733QKVURQ1 | Automotive-grade (AEC-Q100); 150mA, 60V input, but higher IQ (15μA) and larger SO PowerPAD package | Required for ASIL-B functional safety compliance in vehicle body electronics | Choose only if AEC-Q100 qualification and diagnostic features (power-good flag, enable control) are mandatory |
Compared with AP7381-33YR-13, the AP7387-33YR-13 supports 50% higher output current (150mA vs. 100mA) for driving additional peripherals, while compared with TPS7B8733QKVURQ1, it offers 7.5× lower quiescent current (2μA vs. 15μA) and smaller SOT89-R footprint-making it optimal for cost-sensitive, battery-operated industrial and consumer systems.
Availability
AP7387-33YR-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 across extended temperature ranges and long product lifecycles.
Supply support for AP7387-33YR-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 across Asia, Europe, and the U.S., and manufacturing in China, Taiwan, and the Philippines.
The AP7387 series belongs to Diodes' high-reliability, wide-input LDO product line-engineered specifically for industrial, automotive, and battery-powered applications demanding extended input voltage range, ultra-low quiescent current, and robust protection features.
FAQ
What is the minimum input voltage required for regulation at 3.3V output?
The AP7387-33YR-13 requires VIN ≥ VOUT + VDROP. With a typical dropout of 700mV at 100mA, the minimum input is 4.0V. At 150mA, VDROP rises to 1100mV, so VIN must be ≥4.4V to maintain regulation. Input below 5V is not recommended per absolute maximum ratings.
Can the exposed pad (EP) be left floating on the PCB?
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 (θJA increases from 79°C/W to >120°C/W) and risks instability due to parasitic inductance. Minimum recommended copper area is 25 mm².
Does this device require an external bypass capacitor on the EN pin?
The AP7387-33YR-13 has no enable (EN) pin-it is a fixed-output, always-on regulator. All functionality is internal: no external control signals, no shutdown mode, and no soft-start circuitry. Regulation begins immediately upon VIN reaching ≥5V.
Is the AP7387-33YR-13 qualified for automotive applications?
No-the AP7387-33YR-13 is an industrial-grade part rated for -40°C to +85°C ambient. For automotive use, Diodes offers the pin-compatible AP7387Q series (e.g., AP7387Q-33YR-13), which is AEC-Q100 Grade 1 qualified (-40°C to +125°C) and manufactured in IATF 16949-certified facilities.
AP7387-33YR-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):
- 3.3V
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89R-3
AP7387-33YR-13 FAQ
1.How can I place an order for AP7387-33YR-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7387-33YR-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 AP7387-33YR-13 reliable?
The price and inventory of AP7387-33YR-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7387-33YR-13 is usually 5 days.
3.What payment methods are accepted for AP7387-33YR-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7387-33YR-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7387-33YR-13?
AP7387-33YR-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7387-33YR-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 AP7387-33YR-13?
For technical support, including AP7387-33YR-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7387-33YR-13 requirements.
6.How does Aetrix verify that AP7387-33YR-13 is sourced from the original manufacturer or authorized distributors?
All AP7387-33YR-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 AP7387-33YR-13 meets industry standards.
7.What is the process for return or replacement of AP7387-33YR-13?
All AP7387-33YR-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7387-33YR-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 AP7387-33YR-13 part is unused and in its original packaging.
Return procedure for AP7387-33YR-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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