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Diodes Incorporated AP1506-50T5RL-U
- Part No.:
- AP1506-50T5RL-U
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
AP1506-50T5RL-U.pdf
- Description:
- IC REG BUCK 5V 3A TO220-5R
- Quantity:
- Payment:
- Shipping:
Inventory:4,972
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Product details
Overview
AP1506-50T5RL-U from Diodes Incorporated is a fixed 5V, 3A monolithic PWM buck DC/DC converter in TO220-5 (R) package, integrating a power switch and internal compensation to eliminate external transistors and feedback network design. It operates at 150kHz ±15%, supports 4.5–22V input, delivers ±4% output voltage tolerance under full load and temperature range, and features thermal shutdown, current limiting, and logic-level ON/OFF control-used in industrial power supplies and embedded system point-of-load regulation.
For engineers reviewing the AP1506-50T5RL-U datasheet, AP1506-50T5RL-U pinout, AP1506-50T5RL-U application, or AP1506-50T5RL-U equivalent, key selection considerations include its fixed 5V output, 3A continuous load capability, TO220-5 (R) thermal performance (θJC = 5°C/W), shutdown quiescent current of 70–150µA, and compatibility with standard Schottky catch diodes (e.g., B340LA).
Technical Context
The AP1506-50T5RL-U implements voltage-mode non-synchronous PWM control with a built-in 150kHz oscillator and internal error amplifier, eliminating need for external compensation components. Its feedback loop references a precise 1.23V bandgap, enabling stable regulation across 0.2–3A load and -20°C to +85°C ambient.
Thermal shutdown activates at junction temperatures exceeding +125°C, while cycle-by-cycle current limiting triggers at 3.6–5.5A peak switch current; under overload, switching frequency drops to ~10–50kHz to reduce power dissipation. The SD pin accepts 0–0.6V (ON) or 2.0–18V (OFF) logic-level control, with leakage <±1µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% (4.8–5.2V) over full load and temperature range-ensures stable microcontroller or FPGA core rail without external resistor divider. |
| Max Output Current | 3A continuous-supports high-current digital loads without external MOSFETs or heatsink under typical PCB copper area (≥2 in²). |
| Switching Frequency | 150kHz ±15% (127–173kHz)-enables use of compact 47µH inductors and reduces EMI compared to lower-frequency alternatives. |
| Input Voltage Range | 4.5V to 22V-compatible with 5V, 12V, and 24V industrial bus rails, including automotive battery-supplied systems with transient tolerance. |
| Efficiency | 80% typical at VIN=12V, IOUT=3A-minimizes thermal rise in enclosed enclosures and extends operating life in continuous-duty applications. |
| Shutdown Current | 70–150µA at VIN=22V-enables low-power standby mode for battery-backed or energy-sensitive systems. |
| Thermal Resistance | θJC = 5°C/W (TO220-5R)-requires minimal external heatsinking when mounted on ≥2 oz copper with thermal vias. |
Pinout & Package
AP1506-50T5RL-U uses the TO220-5 (R) package-a 5-pin through-hole variant with isolated metal tab (GND-connected) optimized for thermal conduction to heatsinks. Pin 1 (VIN) accepts up to 22V input; Pin 2 (Output) drives the external inductor; Pin 3 (GND) serves as power and signal reference; Pin 4 (FB) is internally tied to 5V output and unused in fixed versions; Pin 5 (SD) enables logic-controlled shutdown.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Input supply rail | Accepts 4.5–22V DC; requires ≥100µF low-ESR input capacitor to suppress switching transients. |
| 2 Output | Internal power switch drain | Drives external inductor; voltage swings between (VIN – VSAT) and ≈–0.5V; trace must be short and wide to minimize ringing. |
| 3 GND | Power and signal ground | Common return for input cap, output cap, and feedback network; connects to metal tab for thermal path. |
| 4 FB | Feedback reference node | Internally connected to 5V output-no external connection required for fixed-version operation. |
| 5 SD | Shutdown control input | Logic-compatible: ≤0.6V = ON, ≥2.0V = OFF; draws <1µA; can be tied to GND for always-on operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3A power switch | Eliminates need for external MOSFET and gate driver-reduces BOM count and layout complexity in space-constrained designs. |
| Internal compensation | Removes requirement for external Type-II/III compensation network-accelerates design cycle and improves stability margin across line/load/temp. |
| Thermal shutdown + current limit | Protects against sustained overloads and ambient overheating without external sensing circuitry-enhances field reliability. |
| Logic-level ON/OFF control | Enables system-level power sequencing via MCU GPIO without level-shifting-supports low-power sleep/wake protocols. |
| RoHS-compliant & halogen-free | Fully lead-free, <900ppm Br/Cl, <1000ppm Sb-meets IPC-1752A material declaration requirements for automotive and industrial end equipment. |
Applications
| Industrial PLC Power Supply | Embedded System Point-of-Load |
|---|---|
|
Use Scenario: Providing regulated 5V/3A to programmable logic controllers in factory automation cabinets with 24V DC input rails. IC Role / Device Role / Timing Role: Primary step-down regulator delivering clean, stable 5V to microcontroller, I/O drivers, and communication interfaces. Use Value: Internal current limiting and thermal shutdown prevent field failures during motor surge events or enclosure overheating. |
Use Scenario: Generating local 5V rail for ARM-based edge computing modules powered from 12V backplane. IC Role / Device Role / Timing Role: Non-synchronous buck controller managing power delivery to SoC, DDR memory, and USB peripherals. Use Value: 150kHz switching allows use of small 47µH shielded inductors, reducing board footprint by >30% vs. 50kHz alternatives. |
| Test Equipment Power Module | POS Terminal Power Stage |
|
Use Scenario: Supplying 5V/3A to portable multimeters and oscilloscope front-ends operating from rechargeable 18V Li-ion packs. IC Role / Device Role / Timing Role: High-efficiency DC/DC stage converting variable battery voltage to fixed 5V for analog front-end and display subsystems. Use Value: 80% efficiency at full load minimizes heat buildup inside sealed handheld enclosures, avoiding thermal derating. |
Use Scenario: Delivering 5V/3A to retail point-of-sale terminals with 12V wall adapters and intermittent high-current printer actuation. IC Role / Device Role / Timing Role: Main power regulator supporting barcode scanner, receipt printer, and touchscreen controller simultaneously. Use Value: Logic-level SD pin enables firmware-controlled power cycling during idle periods, cutting standby consumption to <150µA. |
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 |
|---|---|---|---|
| LM2576-5.0 | 5V fixed, 3A, 52kHz switching, TO220-5 package, no integrated SD pin, higher dropout voltage (minimum 7.5V input) | Lacks logic-level shutdown; requires external ON/OFF transistor; less efficient at light loads due to lower frequency | Choose if legacy design reuse or cost sensitivity outweighs need for low-IQ shutdown and EMI control. |
| MP1584EN-LF-Z | 5V fixed, 4A, 1.5MHz switching, SOIC-8 package, integrated soft-start, 30µA IQ in shutdown | Higher frequency enables smaller magnetics but demands tighter layout; not pin-compatible; lower thermal mass in SOIC | Prefer for compact, high-density boards where 1.5MHz EMI filtering is manageable and thermal budget permits SOIC mounting. |
Compared with LM2576-5.0, AP1506-50T5RL-U offers superior light-load efficiency and integrated shutdown control; versus MP1584EN-LF-Z, it provides higher thermal robustness in TO220-5(R) for sustained 3A operation but requires larger filter components due to lower 150kHz frequency.
Availability
AP1506-50T5RL-U is available at Aetrix Electronics and suitable for industrial PLC power supplies, embedded system point-of-load regulation, test equipment power modules, and POS terminal power stages requiring stable component supply with long-term manufacturability assurance.
Supply support for AP1506-50T5RL-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 power management, signal integrity, and protection solutions for industrial, consumer, and automotive markets.
The AP1506 series belongs to Diodes' monolithic DC/DC converter product line, designed specifically for cost-sensitive, high-reliability step-down applications where integration, thermal resilience, and ease of implementation are prioritized over ultra-high efficiency or ultra-small size.
FAQ
Is AP1506-50T5RL-U pin-compatible with other AP1506 variants?
No-AP1506-50T5RL-U uses the TO220-5 (R) package with reversed pinout versus standard TO220-5. Pin 1 (VIN) and Pin 5 (SD) positions differ; direct substitution requires PCB layout revision. The "R" suffix denotes this rotated configuration, confirmed in Diodes' DS31015 Rev. 10 package drawings.
What is the maximum recommended input voltage for continuous operation?
The absolute maximum VIN rating is +24V, but the recommended operating range is 4.5V to 22V per DS31015. At 22V input and 3A load, junction temperature must be verified using θJA = 31°C/W (TO220-5R) and ambient conditions; derating is advised above 18V for sustained full-load operation.
Does the FB pin require external components in the fixed 5V version?
No-the FB pin is internally connected to the 5V output in AP1506-50T5RL-U. External resistors or capacitors on FB are unnecessary and may impair regulation. The datasheet explicitly states FB is "not used" for fixed-output versions and should remain unconnected.
Can AP1506-50T5RL-U drive a synchronous rectifier?
No-it is a non-synchronous buck controller with an integrated N-channel DMOS switch and requires an external Schottky catch diode (e.g., B340LA). It lacks gate drive outputs or timing control for synchronous MOSFETs; synchronous operation would require a different controller IC such as the AP3418 or MP2307.
AP1506-50T5RL-U Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-220-5 Formed Leads
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 22V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- Frequency - Switching:
- 150kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-5R
AP1506-50T5RL-U FAQ
1.How can I place an order for AP1506-50T5RL-U through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1506-50T5RL-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 AP1506-50T5RL-U reliable?
The price and inventory of AP1506-50T5RL-U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1506-50T5RL-U is usually 5 days.
3.What payment methods are accepted for AP1506-50T5RL-U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1506-50T5RL-U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1506-50T5RL-U?
AP1506-50T5RL-U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1506-50T5RL-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 AP1506-50T5RL-U?
For technical support, including AP1506-50T5RL-U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1506-50T5RL-U requirements.
6.How does Aetrix verify that AP1506-50T5RL-U is sourced from the original manufacturer or authorized distributors?
All AP1506-50T5RL-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 AP1506-50T5RL-U meets industry standards.
7.What is the process for return or replacement of AP1506-50T5RL-U?
All AP1506-50T5RL-U units undergo pre-shipment inspection (PSI). If there is an issue with AP1506-50T5RL-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 AP1506-50T5RL-U part is unused and in its original packaging.
Return procedure for AP1506-50T5RL-U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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