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Diodes Incorporated AP1506-50K5L-13
- Part No.:
- AP1506-50K5L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
AP1506-50K5L-13.pdf
- Description:
- IC REG BUCK 5V 3A TO263-5L
- Quantity:
- Payment:
- Shipping:
Inventory:2,697
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Product details
Overview
AP1506-50K5L-13 from Diodes Incorporated is a monolithic 150kHz, 3A non-synchronous PWM buck DC/DC converter with fixed 5V output, integrated power switch, internal compensation, and thermal/current-limit protection. It operates from 4.5V to 22V input, delivers ±4% output voltage accuracy at 3A load, and uses TO263-5 surface-mount package for high-power density step-down regulation in industrial power supplies.
For engineers reviewing the AP1506-50K5L-13 datasheet, AP1506-50K5L-13 pinout, AP1506-50K5L-13 application, or AP1506-50K5L-13 equivalent, key selection factors include its 5V fixed output, 150kHz switching frequency, ON/OFF shutdown control, built-in 3A switch, and thermal shutdown behavior under sustained overload.
Technical Context
The AP1506-50K5L-13 implements voltage-mode PWM control with a fixed 150kHz oscillator (±15%), internal 1.23V reference, and feedback amplifier driving an integrated N-channel MOSFET switch. Its current-limit threshold is 4.5A typical, and saturation voltage is 1.4V at 3A, enabling efficient operation without external drive circuitry.
Thermal shutdown activates at junction temperatures exceeding +125°C, while current-limit protection reduces switching frequency when FB drops below 0.5V - a behavior confirmed in short-circuit conditions. The device requires no external compensation components due to fully integrated loop control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% (4.8–5.2V) across 0.2–3A load and 8–22V input |
| Switching Frequency | 150kHz ±15% (127–173kHz), enabling compact 47µH inductors and low-ESR output capacitors |
| Max Output Current | 3A continuous DC load capability with integrated switch; peak current limit 4.5A typical |
| Input Voltage Range | 4.5V to 22V DC - supports wide-input industrial rails including 12V and 24V systems |
| Efficiency | 80% typical at VIN = 12V, VOUT = 5V, IOUT = 3A - optimized for mid-power conversion |
| Shutdown Quiescent Current | 70–150µA in standby mode (SD pin high), reducing system-level idle power |
| Thermal Protection | Junction temperature shutdown at +125°C; θJA = 37°C/W on 3in² copper (TO263-5) |
Pinout & Package
AP1506-50K5L-13 uses the TO263-5 (D2PAK) thermally enhanced surface-mount package with exposed metal tab soldered to PCB ground plane for heat dissipation. Pin 1 (VIN) accepts up to 22V input; Pin 2 (Output) drives the external inductor; Pin 3 (GND) is power ground; Pin 4 (FB) monitors regulated output via resistive divider (not used in fixed 5V version); Pin 5 (SD) enables logic-level ON/OFF control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Power Input Supply | Accepts 4.5–22V DC; requires local 100µF+ input capacitor to handle 3A switching transients |
| 2 - Output | Internal Switch Drain | Drives external inductor; swings between (VIN – 1.4V) and ≈–0.5V; minimal copper area recommended |
| 3 - GND | Power Ground Reference | Common return for input cap, output cap, and thermal pad; must connect to large PCB copper pour |
| 4 - FB | Feedback Input | Internally tied to 5V divider in fixed version; left unconnected or grounded if unused |
| 5 - SD | Shutdown Control | Logic-low (<0.6V) enables regulator; logic-high (>2.0V) disables output and reduces IQ to 150µA |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3A Power Switch | Eliminates external MOSFET and gate driver, reducing BOM count and layout complexity |
| Internal Compensation Network | Enables stable regulation with only input/output capacitors and inductor - no external RC network required |
| Thermal Shutdown + Current Limit | Prevents damage during overload or poor heatsinking; frequency foldback avoids thermal runaway under short-circuit |
| Logic-Compatible Shutdown (SD) | Direct interface with microcontroller GPIO or system power sequencer without level-shifting |
| Fixed 5V Output Accuracy | ±4% tolerance over full temperature and load range ensures reliable downstream logic supply compliance |
Applications
| Industrial PLC Power Rails | Embedded System Core Supply |
|---|---|
|
Use Scenario: Providing clean 5V rail for microcontroller, FPGA I/O banks, and peripheral ICs in programmable logic controllers. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator converting 12V/24V field bus to 5V logic supply. Use Value: 80% efficiency at 3A reduces thermal load in enclosed cabinets; TO263-5 package allows direct mounting to metal chassis for passive cooling. |
Use Scenario: Generating stable 5V for ARM Cortex-M based edge nodes operating in ambient temperatures up to +85°C. IC Role / Device Role / Timing Role: Main system power converter with enable control synchronized to boot sequence. Use Value: 70–150µA shutdown current extends battery-backed runtime during sleep; ±4% output ensures USB-compliant host port operation. |
| Point-of-Load Telecom Modules | Automotive Body Control Units |
|
Use Scenario: Local 5V supply in 48V telecom shelf systems where intermediate bus conversion is required. IC Role / Device Role / Timing Role: Secondary buck stage stepping down 12V intermediate rail to 5V for management ASICs. Use Value: 150kHz switching avoids AM radio band interference; thermal shutdown protects against airflow loss in dense card cages. |
Use Scenario: Powering infotainment display controllers and sensor interfaces in 12V automotive environments with load dump immunity. IC Role / Device Role / Timing Role: Robust main 5V regulator tolerant of 22V transients and thermal cycling. Use Value: 4.5–22V input range accommodates cold-crank (6.5V) to load-dump (22V); RoHS/Green compliance meets automotive ELV directives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596S-5.0/NOPB | 150kHz fixed-frequency, 3A, but requires external diode; no integrated switch; ±2% output tolerance | Larger solution size due to external diode and compensation; lower quiescent current (5mA vs 10mA active) | Preferred when tighter output tolerance is critical and board space is not constrained |
| MP1584EN-LF-Z | 1.5MHz switching, 3A, adjustable-only output; requires external feedback resistors; higher efficiency at light loads | Enables smaller magnetics but demands careful EMI filtering; no fixed-5V variant available | Chosen for compact designs needing >1MHz operation and dynamic voltage scaling capability |
Compared with LM2596S-5.0/NOPB, AP1506-50K5L-13 integrates the power switch and eliminates the catch diode, simplifying layout and improving thermal performance in high-ambient environments; versus MP1584EN-LF-Z, it trades higher-frequency efficiency for proven 150kHz stability and fixed-output convenience in cost-sensitive industrial systems.
Availability
AP1506-50K5L-13 is available at Aetrix Electronics and suitable for industrial PLCs, embedded computing modules, telecom point-of-load converters, and automotive body control units requiring stable component supply with long lifecycle support.
Supply support for AP1506-50K5L-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 manufacturer of discrete semiconductors and analog ICs, specializing in power management, signal integrity, and protection solutions for industrial, computing, and automotive markets.
The AP1506 series belongs to Diodes' standard buck regulator product line, designed specifically for cost-effective, high-current DC/DC conversion in space-constrained applications where simplicity and thermal robustness are prioritized over ultra-high efficiency or programmability.
FAQ
What is the maximum input voltage rating for AP1506-50K5L-13?
The absolute maximum input voltage is +24V, but the recommended operating range is 4.5V to 22V. Operation above 22V risks exceeding internal transistor breakdown limits and may trigger immediate thermal shutdown. For automotive applications with load dump events, external clamping (e.g., TVS diode) is advised before the VIN pin.
Does AP1506-50K5L-13 require external compensation components?
No - the AP1506-50K5L-13 features fully integrated compensation circuitry. Only input capacitance (≥100µF), output capacitance (≥220µF low-ESR), and a single external inductor (47µH) are required for stable 5V/3A operation. This eliminates tuning effort and improves design repeatability across production batches.
How does the shutdown (SD) pin behave electrically?
The SD pin is CMOS-compatible: pulling it below 0.6V (typical) enables regulation; pulling it above 2.0V (typical) disables switching and reduces quiescent current to 70–150µA. The pin tolerates up to +18V and draws ≤1µA in either state - enabling direct connection to 3.3V or 5V logic without resistive dividers.
Can AP1506-50K5L-13 be used in adjustable-output configurations?
No - the "50" in the part number denotes factory-trimmed fixed 5.0V output. Internally, the FB pin is connected to a precision resistive divider; attempting to reconfigure it as adjustable will result in incorrect regulation or instability. Use AP1506-K5G-13 for adjustable versions with external resistor programming.
AP1506-50K5L-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263-5
AP1506-50K5L-13 FAQ
1.How can I place an order for AP1506-50K5L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1506-50K5L-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 AP1506-50K5L-13 reliable?
The price and inventory of AP1506-50K5L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1506-50K5L-13 is usually 5 days.
3.What payment methods are accepted for AP1506-50K5L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1506-50K5L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1506-50K5L-13?
AP1506-50K5L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1506-50K5L-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 AP1506-50K5L-13?
For technical support, including AP1506-50K5L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1506-50K5L-13 requirements.
6.How does Aetrix verify that AP1506-50K5L-13 is sourced from the original manufacturer or authorized distributors?
All AP1506-50K5L-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 AP1506-50K5L-13 meets industry standards.
7.What is the process for return or replacement of AP1506-50K5L-13?
All AP1506-50K5L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1506-50K5L-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 AP1506-50K5L-13 part is unused and in its original packaging.
Return procedure for AP1506-50K5L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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