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Diodes Incorporated AP7387-50YR-13
- Part No.:
- AP7387-50YR-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP7387-50YR-13.pdf
- Description:
- LDO CMOS LOWCURR SOT89 T&R 2.5K
- Quantity:
- Payment:
- Shipping:
Inventory:1,797
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Product details
Overview
AP7387-50YR-13 from Diodes Incorporated is a wide-input (5–60 V), 5.0 V fixed-output, 150 mA ultra-low-dropout linear regulator in SOT89-3 package with 700 mV dropout at 100 mA, 2 µA quiescent current, and 70 dB PSRR at 1 kHz - 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 AP7387-50YR-13 datasheet, AP7387-50YR-13 pinout, AP7387-50YR-13 application, or AP7387-50YR-13 equivalent, this page delivers verified pin functions, thermal resistance (79 °C/W), load transient response data, output accuracy (±2%), and validated alternatives for automotive-grade or higher-PSRR LDO selection.
Technical Context
The AP7387-50YR-13 integrates a precision voltage reference, error amplifier, current-limit circuit, thermal shutdown, and short-circuit protection in a single monolithic IC. Its internal architecture enables fast line/load transient response due to optimized control-loop dynamics and low output impedance.
It operates across –40°C to +85°C ambient temperature with junction limit of +150°C, supports 1 µF input and 10 µF ceramic output capacitance (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 |
|---|---|
| Input Voltage Range | 5 V to 60 V - enables direct connection to 12 V, 24 V, 48 V, and 60 V battery rails without pre-regulation. |
| Output Voltage | 5.0 V ±2% - stable supply for microcontrollers, sensors, and logic interfaces requiring tight regulation. |
| Max Output Current | 150 mA - sufficient for low-power MCU cores, RF transceivers, and analog front-ends in portable systems. |
| Dropout Voltage | 700 mV @ 100 mA (typ.) - allows operation down to 5.7 V input while sustaining 5.0 V output. |
| Quiescent Current | 2 µA (typ.) - extends battery life in always-on smoke detectors and remote sensor nodes. |
| PSRR | 70 dB @ 1 kHz - suppresses ripple from noisy DC-DC converters or unregulated battery sources. |
| Thermal Resistance θJA | 79 °C/W (SOT89-3, AP7387-XXYR-13) - defines safe power dissipation limit under PCB copper area constraints. |
Pinout & Package
SOT89-3 package (AP7387-50YR-13) features three terminals: VIN (pin 1), GND (pin 2), and VOUT (pin 3). The exposed tab is internally connected to GND and must be soldered to a large PCB copper pour for thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Input voltage supply | Accepts 5–60 V unregulated input; requires 1 µF ceramic decoupling capacitor placed adjacent to pin. |
| 2 - GND | Ground reference | Primary return path for input/output currents; connects internally to exposed tab for thermal conduction. |
| 3 - VOUT | Regulated output | Delivers stable 5.0 V ±2%; requires 10 µF X7R/X5R ceramic capacitor placed within 3 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input voltage range | 5–60 V operation eliminates need for upstream buck converter in industrial and automotive battery systems. |
| Ultra-low quiescent current | 2 µA typical enables >10-year battery life in smoke detectors using two AA cells (3 V nominal). |
| High PSRR (70 dB @ 1 kHz) | Rejects switching noise from adjacent DC-DC stages, preserving ADC reference stability and sensor signal integrity. |
| Integrated protection | Current limit (250 mA), thermal shutdown (+150°C), and short-circuit protection prevent field failures in harsh environments. |
| RoHS-compliant & halogen-free | Fully lead-free, antimony-free, and <900 ppm Br/Cl - meets automotive and EU environmental compliance requirements. |
Applications
| Smoke Detectors | EV Battery Management |
|---|---|
|
Use Scenario: Standby-powered residential and commercial smoke alarms operating on primary alkaline batteries. IC Role / Device Role / Timing Role: Primary 5 V LDO supplying MCU, CO sensor interface, and audible alarm driver. Use Value: 2 µA quiescent current enables >10-year shelf life; 60 V input withstands battery charger transients during service. |
Use Scenario: Cell monitoring unit in 48 V EV battery packs with variable bus voltage and high EMI exposure. IC Role / Device Role / Timing Role: Local 5 V rail generator for isolated ADCs, temperature sensors, and CAN transceivers. Use Value: 70 dB PSRR rejects high-frequency switching noise from nearby DC-DC converters; thermal shutdown prevents latch-up during cell imbalance events. |
| Microcontroller Power | Home Appliance Control |
|
Use Scenario: Low-power MCU subsystems in smart thermostats, door locks, and IoT edge nodes. IC Role / Device Role / Timing Role: Main 5 V supply for ARM Cortex-M0+ core, flash memory, and peripheral I/O. Use Value: 150 mA output supports active-mode MCU operation with integrated radio; ±2% accuracy ensures reliable brown-out detection. |
Use Scenario: Control board in washing machines, refrigerators, and HVAC systems with fluctuating 12–24 V DC bus. IC Role / Device Role / Timing Role: Regulated 5 V source for display controller, touch panel, and motor driver logic. Use Value: 700 mV dropout allows stable 5 V output even when input sags to 5.7 V during compressor startup surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-quiescent-current, wide-input LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP7387-50Y-13 | SOT89-3 variant with θJA = 165 °C/W (vs. 79 °C/W for YR); same electrical specs but lower thermal performance. | Preferred for cost-sensitive, low-power applications with minimal heat buildup; unsuitable for sustained 150 mA loads in enclosed enclosures. | Select YR for thermally constrained designs; choose Y only if board layout allows generous copper area and ambient stays below 60°C. |
| TPS7B8750QKVURQ1 | Automotive-grade (AEC-Q100), 5 V, 150 mA LDO with 2.5 µA IQ, 400 mV dropout @ 100 mA, and 75 dB PSRR @ 100 Hz. | Validated for automotive BMS and ADAS modules; includes enable pin and power-good flag not present in AP7387. | Choose TPS7B8750QKVURQ1 for ISO 26262 functional safety systems; use AP7387-50YR-13 for industrial or consumer cost-optimized designs. |
Compared with AP7387-50Y-13, the YR variant offers 52% lower thermal resistance for identical power dissipation, enabling higher continuous current in compact layouts; versus TPS7B8750QKVURQ1, it lacks automotive qualification and enable functionality but provides superior PSRR above 100 Hz and lower cost.
Availability
AP7387-50YR-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, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for AP7387-50YR-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 manufacturer specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.
The AP7387 belongs to Diodes' high-voltage LDO family, engineered specifically for industrial and automotive systems demanding wide-input operation, ultra-low IQ, and robust protection in space-constrained environments.
FAQ
What is the maximum allowable input voltage for AP7387-50YR-13?
The absolute maximum input voltage is 80 V, but the recommended operating range is 5 V to 60 V per datasheet DS44416 Rev. 6-2. Operation above 60 V risks exceeding thermal limits under load and violates specified reliability conditions. Sustained 60 V input at 150 mA output yields ~7.5 W power dissipation - requiring careful thermal design with the SOT89-3 YR package's 79 °C/W θJA.
Does AP7387-50YR-13 require an external feedback resistor network?
No. AP7387-50YR-13 uses an internal resistor divider to set its fixed 5.0 V output; no external resistors are needed. This simplifies layout, improves accuracy (±2% over temperature and load), and eliminates drift from external component tolerances. Only input (1 µF) and output (10 µF) ceramic capacitors are required for stability.
How does the thermal shutdown function behave during overload?
When junction temperature reaches +150°C, the device shuts down the pass element and forces VOUT to drop to near 0 V. After thermal recovery (typically 30–60 seconds depending on PCB copper mass), it automatically resumes regulation without external reset. Hysteresis is +30°C, so restart occurs at ~120°C - preventing rapid cycling during marginal thermal conditions.
Can AP7387-50YR-13 be used in automotive applications?
The standard AP7387-50YR-13 is not AEC-Q100 qualified. For automotive use, Diodes offers the AP7387Q series (e.g., AP7387Q-50YR-13), which undergoes extended temperature testing (–40°C to +125°C), enhanced ESD robustness (HBM 8 kV), and process controls aligned with automotive quality standards. Use AP7387Q variants for infotainment, body control, or BMS modules.
AP7387-50YR-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):
- 5V
- 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-89R-3
AP7387-50YR-13 FAQ
1.How can I place an order for AP7387-50YR-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7387-50YR-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 AP7387-50YR-13 reliable?
The price and inventory of AP7387-50YR-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7387-50YR-13 is usually 5 days.
3.What payment methods are accepted for AP7387-50YR-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7387-50YR-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7387-50YR-13?
AP7387-50YR-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7387-50YR-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 AP7387-50YR-13?
For technical support, including AP7387-50YR-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7387-50YR-13 requirements.
6.How does Aetrix verify that AP7387-50YR-13 is sourced from the original manufacturer or authorized distributors?
All AP7387-50YR-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 AP7387-50YR-13 meets industry standards.
7.What is the process for return or replacement of AP7387-50YR-13?
All AP7387-50YR-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7387-50YR-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 AP7387-50YR-13 part is unused and in its original packaging.
Return procedure for AP7387-50YR-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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