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Diodes Incorporated AP7381-50Y-13
- Part No.:
- AP7381-50Y-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
AP7381-50Y-13.pdf
- Description:
- IC REG LINEAR 5V 150MA SOT89
- Quantity:
- Payment:
- Shipping:
Inventory:4,730
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Product details
Overview
AP7381-50Y-13 from Diodes Incorporated is a fixed-output 5.0V ultra-low dropout (ULDO) linear regulator IC designed for high-input-voltage portable and industrial power rails. It delivers up to 150mA output current with 1000mV dropout at 100mA, ±2% output voltage accuracy over temperature, and 2.5µA quiescent current - enabling long battery life in USB-powered meters and handheld devices.
For engineers reviewing the AP7381-50Y-13 datasheet, AP7381-50Y-13 pinout, AP7381-50Y-13 application, or AP7381-50Y-13 equivalent, key selection criteria include wide 3.3–40V input range compatibility, thermal shutdown and short-circuit protection, SOT89 package thermal performance (125°C/W θJA), and low-ESR ceramic capacitor support without external compensation.
Technical Context
The AP7381-50Y-13 integrates a precision voltage reference, error amplifier, resistor network for fixed 5.0V output, current-limit circuitry, and enable-controlled startup. Its architecture supports stable regulation under fast load transients while maintaining ultra-low ground current across full input and temperature ranges.
It operates with no external feedback components, uses internal thermal shutdown triggered at +160°C with +20°C hysteresis, and achieves 60dB PSRR at 1kHz - critical for noise-sensitive analog and mixed-signal subsystems powered from noisy DC sources like automotive or metering rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±2% (ensures consistent logic-level supply for microcontrollers and sensors) |
| Input Voltage Range | 3.3V to 40V (supports direct connection to unregulated 12V/24V rails or multi-cell batteries) |
| Max Output Current | 150mA (sufficient for MCU cores, RF modules, and small displays without external pass devices) |
| Dropout Voltage | 1000mV @ 100mA (enables regulation down to VIN = 6.0V, preserving headroom in brownout conditions) |
| Quiescent Current | 2.5µA @ zero load (extends shelf life and runtime in always-on battery applications) |
| Thermal Shutdown | Activates at +160°C with +20°C hysteresis (prevents latch-up and enables safe auto-recovery after overload) |
| PSRR | 60dB @ 1kHz (attenuates switching noise from upstream DC/DC converters feeding the LDO) |
Pinout & Package
The AP7381-50Y-13 is housed in a thermally enhanced SOT89-3 surface-mount package (4.6mm × 2.6mm × 1.6mm), optimized for PCB heat dissipation with exposed tab connected to GND. Its three terminals are arranged in standard top-view order: Pin 1 = VIN, Pin 2 = GND, Pin 3 = VOUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Unregulated Input Supply | Accepts 3.3–40V; requires ≥1µF ceramic input capacitor for stability and ESD filtering |
| 2 (GND) | Power Ground Reference | Common return path for input/output currents and thermal pad connection; must be low-impedance |
| 3 (VOUT) | Regulated Output Terminal | Delivers stable 5.0V ±2%; requires ≥2.2µF ceramic output capacitor for transient response and loop stability |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range Support | Operates from 3.3V to 40V - eliminates need for pre-regulation stages in industrial and automotive auxiliary supplies |
| Ultra-Low Quiescent Current | 2.5µA at zero load - reduces standby power loss by >90% vs. standard LDOs, critical for energy-harvesting and coin-cell designs |
| Ceramic Capacitor Compatibility | Stable with ≥2.2µF X5R/X7R ceramic output caps - avoids costly tantalum or electrolytic capacitors and improves reliability |
| Integrated Protection | Current limit (150mA), thermal shutdown (+160°C), and short-circuit protection - enables robust operation without external circuitry |
| High Accuracy Regulation | ±2% output tolerance over -40°C to +125°C - ensures reliable interface timing and ADC reference stability across environments |
Applications
| Smart Electricity Meters | Portable Medical Sensors |
|---|---|
Use Scenario: Powering metrology ICs, RTCs, and wireless transceivers in Class 0.2 revenue-grade e-meters operating from 12–36V DC rails. IC Role / Device Role / Timing Role: Primary 5V supply rail regulator with low-noise output and thermal resilience during extended field deployment. Use Value: Maintains ±2% output accuracy over -40°C to +85°C ambient, ensuring consistent ADC reference and real-time clock timing across seasonal extremes. |
Use Scenario: Providing clean 5V bias to low-power pulse oximeters and glucose monitors powered by single Li-ion cells or coin cells with boost converters. IC Role / Device Role / Timing Role: Post-regulator for noise-sensitive analog front-ends and Bluetooth LE radios requiring stable voltage during intermittent transmit bursts. Use Value: 60dB PSRR at 1kHz suppresses switching ripple from upstream DC/DC, reducing signal-to-noise ratio degradation in optical sensing paths. |
| Industrial Handheld Scanners | USB-Powered Test Instruments |
Use Scenario: Regulating 5V for CMOS image sensors, laser drivers, and ARM Cortex-M microcontrollers in ruggedized barcode scanners using 3.7–16.8V battery packs. IC Role / Device Role / Timing Role: Main system power regulator with fast load transient response to handle burst-mode imaging and motor actuation. Use Value: 1000mV dropout at 100mA allows operation down to 6.0V input - extending usable battery range by ~15% compared to standard 300mV-dropout LDOs. |
Use Scenario: Deriving stable 5V from USB 2.0/3.0 ports for benchtop oscilloscope probes, logic analyzers, and calibration tools with mixed-signal ASICs. IC Role / Device Role / Timing Role: Isolation regulator between noisy USB VBUS and precision analog measurement circuits. Use Value: 2.5µA quiescent current minimizes self-heating in sealed enclosures, preventing thermal drift in calibrated reference voltages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ULDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-5002E/MB | 5.0V fixed, 250mA, 600mV dropout @ 250mA, 3µA IQ, SOT23-5 package | Higher current but lower thermal capability (θJA = 167°C/W); lacks integrated short-circuit protection | Select when higher output current is required and board space permits larger copper pour for thermal management |
| TPS7A2050PDBVR | 5.0V fixed, 300mA, 170mV dropout @ 300mA, 6.5µA IQ, SOT23-5 package | Lower dropout and higher current, but only rated to 6.5V input - unsuitable for >6.5V rails without pre-regulation | Choose for low-input-voltage USB-C PD or battery-powered systems where <6.5V operation is guaranteed |
Compared with MCP1703T-5002E/MB and TPS7A2050PDBVR, the AP7381-50Y-13 uniquely balances 40V input tolerance, integrated protection, and ultra-low IQ in a thermally efficient SOT89 package - making it optimal for industrial and metering applications where input voltage variability and long-term reliability outweigh raw current capacity.
Availability
AP7381-50Y-13 is available at Aetrix Electronics and suitable for smart metering, portable medical instrumentation, industrial handheld scanners, and USB-powered test equipment requiring stable component supply across extended temperature and voltage ranges.
Supply support for AP7381-50Y-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 ICs for power management, signal integrity, and connectivity applications.
The AP7381 series belongs to Diodes' high-voltage ULDO regulator product line, engineered specifically for battery-powered and industrial systems needing wide-input, low-quiescent-current regulation without external compensation.
FAQ
What is the maximum allowable input voltage for AP7381-50Y-13?
The absolute maximum input voltage is 45V, but the recommended operating range is 3.3V to 40V per the datasheet. Operation above 40V risks exceeding thermal limits under load and violates specified operating conditions - sustained use beyond 40V may reduce lifetime or trigger thermal shutdown repeatedly.
Can AP7381-50Y-13 operate with a 1µF ceramic input capacitor and no output capacitor?
No. The datasheet mandates a minimum 2.2µF ceramic output capacitor for stability and transient response; omitting it causes oscillation and output overshoot during load steps. While 1µF input capacitance meets minimum requirements, adding a 10nF high-frequency bypass capacitor near VIN improves ESD immunity and high-frequency PSRR.
Does AP7381-50Y-13 support reverse polarity protection?
No. The device lacks internal reverse-voltage blocking; applying negative voltage to VIN relative to GND exceeds the -0.3V absolute maximum rating and can cause permanent damage. External protection - such as a series Schottky diode or ideal diode controller - is required in systems prone to reverse battery insertion or incorrect cabling.
Is AP7381-50Y-13 qualified for automotive applications per AEC-Q100?
No. The AP7381-50Y-13 is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., AP7381Q series) with PPAP documentation, IATF 16949 manufacturing, and extended temperature validation - this part is intended for industrial, commercial, and portable consumer applications only.
AP7381-50Y-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1V @ 100mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 2.5 µA
- Current - Supply (Max):
- 25 µA
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Current Limit, Thermal Shutdown
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-3
AP7381-50Y-13 FAQ
1.How can I place an order for AP7381-50Y-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP7381-50Y-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 AP7381-50Y-13 reliable?
The price and inventory of AP7381-50Y-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP7381-50Y-13 is usually 5 days.
3.What payment methods are accepted for AP7381-50Y-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP7381-50Y-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP7381-50Y-13?
AP7381-50Y-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP7381-50Y-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 AP7381-50Y-13?
For technical support, including AP7381-50Y-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP7381-50Y-13 requirements.
6.How does Aetrix verify that AP7381-50Y-13 is sourced from the original manufacturer or authorized distributors?
All AP7381-50Y-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 AP7381-50Y-13 meets industry standards.
7.What is the process for return or replacement of AP7381-50Y-13?
All AP7381-50Y-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP7381-50Y-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 AP7381-50Y-13 part is unused and in its original packaging.
Return procedure for AP7381-50Y-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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