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Diodes Incorporated AP1506-50K5G-13
- Part No.:
- AP1506-50K5G-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
AP1506-50K5G-13.pdf
- Description:
- IC REG BUCK 5V 3A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:116
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Product details
Overview
AP1506-50K5G-13 from Diodes Incorporated is a fixed 5V, 3A monolithic PWM buck DC/DC converter in TO263-5 package with integrated power switch, 150kHz switching frequency, ±4% output voltage tolerance, and thermal/current-limit protection. It delivers high-efficiency step-down regulation for industrial power rails requiring stable 5V/3A output from 8–22V input.
For engineers reviewing the AP1506-50K5G-13 datasheet, AP1506-50K5G-13 pinout, AP1506-50K5G-13 application, or AP1506-50K5G-13 equivalent, key selection criteria include its fixed 5V output, internal MOSFET, shutdown control via SD pin, thermal shutdown threshold, and TO263-5 thermal performance with 37°C/W θJA (3″² copper).
Technical Context
The AP1506-50K5G-13 implements voltage-mode non-synchronous PWM control with an internal 1.23V reference and 150kHz oscillator (±15%). Its feedback loop uses a single-resistor-adjustable FB node referenced to GND, eliminating external compensation components.
It integrates a 3A power switch with 1.4–1.6V saturation voltage at full load, supports logic-level ON/OFF control via the SD pin (0.6V low-threshold, 2.0V high-threshold), and reduces switching frequency to 10–50kHz during current-limit events when VFB drops below 0.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% (4.8–5.2V) under 8–22V input and 0.2–3A load |
| Switching Frequency | 150kHz ±15% (127–173kHz); enables compact 47µH inductor and low-ESR output capacitor |
| Output Current | 3A continuous; peak current limit 3.6–5.5A prevents switch failure during overload |
| Input Voltage Range | 4.5V to 22V; supports wide-input industrial and automotive battery-supplied systems |
| Efficiency | 80% typical at VIN=12V, VOUT=5V, IOUT=3A; optimized for mid-power buck conversion |
| Thermal Shutdown | Activates at TJ ≈125°C; protects die during sustained overloads or poor PCB heatsinking |
| Quiescent Current | 5–10mA active; 70–200µA in shutdown (SD = high), enabling low-power standby modes |
Pinout & Package
AP1506-50K5G-13 uses the TO263-5 surface-mount package with exposed metal tab (GND) for thermal conduction to PCB copper. Recommended minimum copper area: 0.8 inch² (ideally ≥2 inch² of 2 oz copper) for thermal management at 3A load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Positive input supply | Accepts 4.5–22V; requires local ceramic bypass capacitor to handle high di/dt switching currents |
| 2 Output | Internal power switch drain | Swings between (VIN − VSAT) and ~−0.5V; minimal copper area recommended to reduce EMI coupling |
| 3 GND | Circuit ground reference | Common return for control circuitry, feedback, and shutdown; tied to exposed metal tab |
| 4 FB | Feedback voltage sense | Monitors output via resistive divider; regulates VOUT by comparing to internal 1.23V reference |
| 5 SD | Shutdown control input | Logic-compatible enable: <0.6V = ON, >2.0V = OFF; draws <1µA in either state |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3A power switch | Eliminates external MOSFET and gate driver; reduces BOM count and layout complexity |
| Internal compensation network | Enables stable regulation without external RC networks-simplifies design and improves production yield |
| ON/OFF shutdown control | Reduces total input current to ≤200µA in standby; supports system-level power sequencing |
| Thermal + current-limit protection | Prevents catastrophic failure during overload, short-circuit, or inadequate heatsinking |
| RoHS-compliant & halogen-free | Meets EU RoHS 2/3 and Diodes' "Green" definition (<900ppm Br/Cl, <1000ppm Sb) |
Applications
| Industrial PLC Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Provides regulated 5V rail for microcontrollers, CAN transceivers, and sensor interfaces in programmable logic controllers. IC Role / Device Role / Timing Role: Primary buck regulator delivering clean, stable 5V/3A from 12–24V DC bus. Use Value: Internal switch and thermal protection ensure reliability in unventilated enclosures with ambient temperatures up to +85°C. | Use Scenario: Powers MCU and peripheral ICs in body control units using vehicle battery (9–16V nominal). IC Role / Device Role / Timing Role: Fixed-output DC/DC converter with shutdown control synchronized to ignition state. Use Value: 80% efficiency at 3A minimizes heat rise in confined modules; SD pin enables low-current sleep mode during vehicle off-state. |
| Point-of-Load Converter for FPGA Boards | Smart Meter Power Management |
Use Scenario: Generates local 5V supply for FPGA I/O banks and configuration circuitry on embedded carrier boards. IC Role / Device Role / Timing Role: Compact, high-current POL regulator placed near load to minimize IR drop and noise. Use Value: TO263-5 package with large thermal pad allows direct mounting to inner-layer copper planes, achieving ≤37°C/W θJA. | Use Scenario: Supplies 5V to metrology ASIC, RTC, and RF transceiver in utility smart meters operating across −25°C to +70°C. IC Role / Device Role / Timing Role: Main system regulator with guaranteed ±4% output accuracy over temperature and line/load variation. Use Value: 150kHz switching avoids AM radio band interference; built-in current limit prevents damage during meter tamper events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596S-5.0/NOPB | 3A adjustable/fixed buck; 150kHz; ±2% output tolerance; higher quiescent current (5mA vs. 5–10mA active) | Requires external compensation; wider input range (4.5–40V); less efficient at 3A (73% vs. 80%) | Preferred where tighter output tolerance or higher VIN capability is required, but adds design complexity |
| MP1584EN-LF-Z | 3A adjustable buck; 1.5MHz switching; ±1.5% output tolerance; requires external feedback resistors | Enables smaller magnetics (10–22µH); higher EMI risk; no fixed 5V variant-requires resistor setup | Chosen for space-constrained designs needing high-frequency operation, but sacrifices simplicity and thermal margin |
Compared with LM2596S-5.0/NOPB and MP1584EN-LF-Z, the AP1506-50K5G-13 offers plug-and-play 5V regulation with integrated compensation and superior thermal robustness in TO263-5, making it optimal for cost-sensitive, thermally demanding industrial applications where layout simplicity and reliability outweigh ultra-compact size or sub-1% accuracy needs.
Availability
AP1506-50K5G-13 is available at Aetrix Electronics and suitable for industrial PLC power supplies, automotive body control modules, FPGA point-of-load converters, and smart meter power management requiring stable component supply and long-term manufacturability.
Supply support for AP1506-50K5G-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' monolithic DC/DC converter product line, designed specifically for cost-effective, high-reliability step-down regulation in space- and thermal-constrained applications without external MOSFETs or compensation networks.
FAQ
What is the maximum recommended PCB copper area for thermal management of AP1506-50K5G-13?
The datasheet specifies a minimum of 0.8 inch² copper area for TO263-5, with ideal performance achieved using ≥2 inch² of 2 oz copper. Thermal resistance improves up to ~6 inch², beyond which diminishing returns occur. The metal tab must be soldered directly to this copper plane for effective heat transfer.
Can AP1506-50K5G-13 operate with input voltage below 4.5V?
No. The absolute maximum rating specifies 4.5V minimum operating voltage. Below this, the internal bias circuitry cannot sustain regulation, and the device may fail to start or exhibit unstable switching. For sub-4.5V inputs, consider low-VIN buck regulators such as the AP6320x series.
Does the AP1506-50K5G-13 require an external Schottky diode?
Yes. Although the IC integrates the high-side switch, it is a non-synchronous buck controller requiring an external catch diode (e.g., B340LA or B340LB for 3A). The diode conducts during the switch-off phase and must be placed adjacent to the IC's Output and GND pins to minimize loop inductance.
Is AP1506-50K5G-13 qualified for automotive AEC-Q100 applications?
No. While Diodes offers AEC-Q100 variants in other families, the AP1506 series-including AP1506-50K5G-13-is not AEC-Q100 qualified. It is rated for industrial temperature range (−20°C to +85°C ambient), not automotive (−40°C to +125°C junction). For automotive use, consider the AP63300Q or similar qualified parts.
AP1506-50K5G-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- Surface Mount
- Supplier Device Package:
- TO-263-5
AP1506-50K5G-13 FAQ
1.How can I place an order for AP1506-50K5G-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1506-50K5G-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 AP1506-50K5G-13 reliable?
The price and inventory of AP1506-50K5G-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1506-50K5G-13 is usually 5 days.
3.What payment methods are accepted for AP1506-50K5G-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1506-50K5G-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1506-50K5G-13?
AP1506-50K5G-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1506-50K5G-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 AP1506-50K5G-13?
For technical support, including AP1506-50K5G-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1506-50K5G-13 requirements.
6.How does Aetrix verify that AP1506-50K5G-13 is sourced from the original manufacturer or authorized distributors?
All AP1506-50K5G-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 AP1506-50K5G-13 meets industry standards.
7.What is the process for return or replacement of AP1506-50K5G-13?
All AP1506-50K5G-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1506-50K5G-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 AP1506-50K5G-13 part is unused and in its original packaging.
Return procedure for AP1506-50K5G-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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