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Diodes Incorporated AP1506-T5G-U
- Part No.:
- AP1506-T5G-U
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-220-5
- Datasheet:
-
AP1506-T5G-U.pdf
- Description:
- IC REG BUCK 3A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,689
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Product details
Overview
AP1506-T5G-U from Diodes Incorporated is a monolithic 150kHz, 3A non-synchronous PWM buck DC/DC converter with integrated power switch, fixed 150kHz switching frequency, ±4% output voltage tolerance (adjustable version), thermal shutdown, and current-limit protection. It operates from 4.5V to 22V input and delivers up to 3A load current in TO220-5 package, used in on-card step-down regulators for industrial power supplies.
For engineers reviewing the AP1506-T5G-U datasheet, AP1506-T5G-U pinout, AP1506-T5G-U application, or AP1506-T5G-U equivalent, key selection criteria include its adjustable 1.23V–18V output range, 150kHz fixed-frequency operation, internal compensation, ON/OFF shutdown control, and thermal/current protection behavior under transient overload conditions.
Technical Context
The AP1506-T5G-U implements voltage-mode PWM control with an internal 1.23V reference and 150kHz oscillator. Its feedback loop uses a single-resistor divider to set output voltage, eliminating external compensation components. The internal 3A DMOS switch enables high-current operation without external transistors.
Thermal shutdown activates at junction temperatures exceeding +125°C, while current limit triggers at 3.6–5.5A peak switch current. When VFB drops below 0.5V during overcurrent, switching frequency reduces to ~10–50kHz to limit power dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 150 kHz ±15%; enables use of smaller inductors (e.g., 47 µH) and output capacitors vs. lower-frequency regulators |
| Output Current | 3 A continuous; supports mid-power applications without external MOSFET or heat sink under moderate ambient conditions |
| Input Voltage Range | 4.5 V to 22 V; compatible with 5V, 12V, and 24V rail systems common in industrial and embedded power designs |
| Feedback Reference | 1.23 V ±2.7%; sets output via R1/R2 divider (VOUT = 1.23 × (1 + R2/R1)), enabling precise adjustable regulation |
| Quiescent Current | 5–10 mA active; drops to 70–150 µA in shutdown mode (SD pin high), reducing standby power loss |
| Protection Features | Thermal shutdown (>125°C) and cycle-by-cycle current limit (3.6–5.5 A); prevents damage during short-circuit or overload events |
| Output Voltage Accuracy | ±4% over full temperature and load range; ensures stable regulation for sensitive downstream logic and analog circuitry |
Pinout & Package
AP1506-T5G-U is housed in a TO220-5 package with exposed metal tab connected to GND for thermal conduction. The package requires mechanical mounting and heatsinking for sustained 3A operation above +60°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VIN | Positive input supply | Accepts 4.5–22V DC; requires local 100µF+ low-ESR input capacitor to suppress switching transients |
| 2: Output | Internal power switch drain | Switches between (VIN − VSAT) and ≈−0.5V; connects to inductor input; minimal copper area recommended to reduce EMI |
| 3: GND | Power and signal ground | Common return for internal circuits, feedback, and shutdown; tied to metal tab for thermal path |
| 4: FB | Voltage feedback input | Senses output via resistor divider; regulates VOUT to 1.23V at this pin; bias current ≤50 nA minimizes divider error |
| 5: SD | Shutdown control input | Logic-level enable: <0.6V = ON, >2.0V = OFF; draws ≤1 µA; can be tied to GND if unused |
Key Features
| Feature | Design Value |
|---|---|
| Built-in 3A DMOS switch | Eliminates need for external high-side transistor and gate driver, reducing BOM count and layout complexity |
| Internal compensation network | Enables stable regulation with only FB resistor divider-no external compensation capacitors required |
| Adjustable output (1.23–18V) | Supports wide range of system rails using two resistors; avoids stocking multiple fixed-output variants |
| ON/OFF shutdown with µA quiescent draw | Reduces total input current to ≤150 µA in standby, critical for battery-backed or energy-sensitive systems |
| Thermal and current-limit protection | Self-protecting operation prevents latch-up or destruction during fault conditions without external circuitry |
Applications
| Industrial PLC Power Supply | Embedded System Core Rail |
|---|---|
Use Scenario: Providing clean 3.3V or 5V core power to microcontrollers and FPGAs inside programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering regulated output from 12–24V DC bus; handles 3A peak loads during processor wake-up. Use Value: Integrated switch and protection eliminate discrete MOSFET and sense resistor, improving reliability and reducing PCB footprint by >30% vs. controller+MOSFET solution. |
Use Scenario: Generating configurable 1.8V–5V rails for SoC I/O, memory, and peripheral interfaces in medical data loggers and edge IoT gateways. IC Role / Device Role / Timing Role: Adjustable buck converter configured via precision resistor divider; maintains ±4% output accuracy across -20°C to +85°C ambient. Use Value: 1.23V reference and low FB bias current (<50 nA) enable accurate, low-drift output setting without trimming or calibration. |
| On-Card DC/DC Converter | Positive-to-Negative Inverter |
Use Scenario: Local point-of-load conversion on dense PCBs where space is constrained and thermal management relies on board copper. IC Role / Device Role / Timing Role: High-current buck regulator mounted directly on main board; TO220-5 tab soldered to 2+ in² copper pour for passive cooling. Use Value: Fixed 150kHz frequency allows predictable EMI filtering design; internal compensation simplifies layout validation. |
Use Scenario: Generating negative bias voltages (e.g., -5V) from positive input rails in op-amp and sensor signal conditioning circuits. IC Role / Device Role / Timing Role: Buck converter operated in inverting topology with external diode and capacitor; leverages same 3A switch and feedback architecture. Use Value: Adjustable feedback reference and robust current limit allow safe operation in inverted configuration without additional ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596S-ADJ | 150kHz fixed frequency, 3A rating, but requires external compensation and has higher dropout (≥2V) | Lacks integrated thermal shutdown hysteresis; less robust under sustained overload | Prefer AP1506-T5G-U when board space is limited and internal compensation is needed |
| MP1584EN-LF-Z | 1.5MHz switching, 3A, synchronous rectification, but no integrated thermal shutdown flag | Higher efficiency at light loads due to sync FET, but more complex layout and EMI filtering | Choose AP1506-T5G-U for cost-sensitive, thermally demanding 150kHz designs with proven ruggedness |
Compared with LM2596S-ADJ and MP1584EN-LF-Z, AP1506-T5G-U offers simpler design (no external compensation), stronger thermal protection with hysteresis, and lower component count for 150kHz industrial applications-making it optimal where reliability and layout simplicity outweigh ultra-high-frequency benefits.
Availability
AP1506-T5G-U is available at Aetrix Electronics and suitable for industrial PLC power supplies, embedded system core rails, on-card DC/DC converters, and positive-to-negative inverter circuits requiring stable component supply and long-term manufacturability support.
Supply support for AP1506-T5G-U 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, computing, and consumer markets.
The AP1506 series belongs to Diodes' standard buck regulator product line, designed specifically for cost-effective, robust, and easy-to-implement mid-power DC/DC conversion in space-constrained industrial and embedded applications.
FAQ
What is the maximum recommended input voltage for AP1506-T5G-U?
The absolute maximum VIN is +24V, but the recommended operating range is 4.5V to 22V per datasheet specifications. Operation above 22V risks exceeding internal device stress limits and may trigger premature thermal shutdown or reduce long-term reliability-even if within absolute max ratings.
Can AP1506-T5G-U be used in synchronous buck configuration?
No. AP1506-T5G-U is a non-synchronous buck converter with a single internal N-channel DMOS switch and requires an external Schottky catch diode. It lacks a second integrated switch or gate drive outputs needed for synchronous rectification.
How does the current-limit protection behave during overload?
When current limit activates (3.6–5.5A peak), the device reduces switching frequency to 10–50kHz if VFB falls below 0.5V. This foldback behavior lowers average power dissipation and prevents thermal runaway, allowing safe operation until fault clears.
Is AP1506-T5G-U RoHS-compliant and halogen-free?
Yes. AP1506-T5G-U is fully RoHS 2 compliant (2011/65/EU), lead-free, and classified as "Green" per Diodes Incorporated's definition: <900ppm Br, <900ppm Cl (total Br+Cl <1500ppm), and <1000ppm Sb compounds.
AP1506-T5G-U Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- TO-220-5
- Packaging:
- Tube
- 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:
- Through Hole
- Supplier Device Package:
- TO-220-5
AP1506-T5G-U FAQ
1.How can I place an order for AP1506-T5G-U through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1506-T5G-U 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-T5G-U reliable?
The price and inventory of AP1506-T5G-U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1506-T5G-U is usually 5 days.
3.What payment methods are accepted for AP1506-T5G-U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1506-T5G-U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1506-T5G-U?
AP1506-T5G-U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1506-T5G-U 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-T5G-U?
For technical support, including AP1506-T5G-U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1506-T5G-U requirements.
6.How does Aetrix verify that AP1506-T5G-U is sourced from the original manufacturer or authorized distributors?
All AP1506-T5G-U 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-T5G-U meets industry standards.
7.What is the process for return or replacement of AP1506-T5G-U?
All AP1506-T5G-U units undergo pre-shipment inspection (PSI). If there is an issue with AP1506-T5G-U, 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-T5G-U part is unused and in its original packaging.
Return procedure for AP1506-T5G-U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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