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Diodes Incorporated AP1501A-K5G-U
- Part No.:
- AP1501A-K5G-U
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
AP1501A-K5G-U.pdf
- Description:
- IC REG BUCK 3A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,147
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Product details
Overview
AP1501A-K5G-U from Diodes Incorporated is a monolithic 150kHz, 5A non-synchronous PWM buck DC/DC converter in TO263-5 package with integrated power switch, fixed 150kHz oscillator, internal compensation, and ±4% output voltage tolerance. It delivers regulated 5A output current at up to 40V input, supports adjustable output (1.23V–37V), and includes thermal shutdown and current-limit protection for industrial power conversion.
For engineers reviewing the AP1501A-K5G-U datasheet, AP1501A-K5G-U pinout, AP1501A-K5G-U application, or AP1501A-K5G-U equivalent, key selection criteria include its 5A load capability without external MOSFET, 150kHz switching frequency enabling compact LC filters, ON/OFF logic-controlled shutdown, and feedback pin bias current of 40–60nA for precision regulation loop design.
Technical Context
The AP1501A-K5G-U implements voltage-mode PWM control with a built-in 1.235V reference and 150kHz oscillator, delivering duty cycle control directly proportional to VOUT/VIN. Its internal 5A power switch eliminates external transistor requirements, while the feedback amplifier compares output-derived voltage against the 1.23V reference to adjust pulse width.
Thermal shutdown activates above +125°C junction temperature, and peak current limiting triggers at 5.5–6.5A. The SD pin accepts logic-level signals (VIL ≤ 0.6V for ON, VIH ≥ 2.0V for OFF) to reduce quiescent current to 150–250µA in standby mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 150kHz ±15% - enables use of smaller inductors (e.g., 18–22µH) and output capacitors vs. lower-frequency regulators |
| Output Current | 5A continuous - integrated switch handles full load without external MOSFET or driver circuitry |
| Input Voltage Range | 4.5V to 40V - supports wide-input industrial and automotive battery-fed systems |
| Feedback Reference | 1.23V ±1.5% - sets output voltage accuracy for adjustable configurations (VOUT = 1.23V × (1 + R2/R1)) |
| Quiescent Current | 5–10mA active, 150–250µA standby - low power consumption during logic-controlled shutdown |
| Thermal Protection | Junction shutdown at +125°C - prevents permanent damage under sustained overload or poor heatsinking |
| Current Limit | 5.5–6.5A peak - protects switch and external diode during short-circuit or startup surge conditions |
Pinout & Package
AP1501A-K5G-U is housed in a surface-mount TO263-5 (D²PAK) package with exposed metal tab electrically connected to GND for thermal conduction to PCB copper. Minimum recommended copper area is 0.8 inch² (2 oz), ideally ≥2 inch² for 5A operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Positive input supply | Accepts 4.5–40V DC; requires local bypass capacitor to handle high di/dt switching currents |
| 2 Output | Internal power switch drain | Drives external catch diode and inductor; voltage swings between (VIN – 1.6V) and ~–0.5V |
| 3 GND | Power and signal ground | Common return for internal circuits, thermal tab connection, and feedback reference |
| 4 FB | Feedback input | Senses output via resistor divider; 40–60nA bias current affects divider resistor selection (typically 1–3kΩ) |
| 5 SD | Shutdown control | Logic-compatible input: ≤0.6V enables regulator, ≥2.0V disables it; draws ≤25µA when asserted |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5A power switch | Eliminates need for external MOSFET, gate driver, and associated layout complexity |
| Internal compensation network | Enables stable regulation with no external compensation components across line/load variations |
| Adjustable output range | 1.23V to 37V via two-resistor feedback divider - supports custom rail generation |
| Logic-level ON/OFF control | SD pin compatible with 3.3V/5V microcontrollers - enables system-level power sequencing |
| Thermal and overcurrent protection | Auto-recovery shutdown prevents latch-up during fault conditions without external circuitry |
Applications
| Industrial PLC Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Generating 5V/5A from 12V vehicle battery for MCU, CAN transceivers, and sensors in body electronics. IC Role / Device Role / Timing Role: Primary step-down regulator providing isolated, regulated 5V rail with logic-controlled enable for sleep/wake cycles. Use Value: 150kHz switching allows compact 22µH inductor and ceramic output capacitors, reducing board space by >30% vs. 50kHz alternatives. | Use Scenario: Converting 24V industrial bus to 3.3V for FPGA configuration and I/O interface logic. IC Role / Device Role / Timing Role: Fixed-output buck converter supplying clean, low-noise 3.3V to sensitive digital loads with tight ±4% tolerance. Use Value: Internal compensation ensures stable regulation across –20°C to +85°C ambient without tuning, simplifying qualification. |
| Point-of-Load Telecom Converter | LED Driver Bias Supply |
Use Scenario: Providing 12V/5A from 48V telecom rectifier for fan controllers and monitoring ASICs. IC Role / Device Role / Timing Role: High-input-voltage buck regulator operating at 40V max input with thermal foldback during overload. Use Value: 40V absolute maximum input rating and 125°C thermal shutdown allow direct connection to unregulated 48V distribution rails. | Use Scenario: Generating adjustable 15V bias for constant-current LED driver ICs in architectural lighting systems. IC Role / Device Role / Timing Role: Adjustable-output buck controller setting precise LED string voltage using external resistor divider. Use Value: 1.23V reference with ±1.5% tolerance ensures <±2% output error at 15V, critical for consistent LED brightness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596S-ADJ | 150kHz fixed frequency, 3A output, TO263-5 package, but lacks integrated thermal shutdown and has higher dropout voltage | Lower current capacity limits use in 5A designs; requires external thermal management | Select only if load current ≤3A and thermal margin is verified with heatsink |
| MP1584EN-LF-Z | 1.5MHz switching, 4A output, SOIC-8 package, integrated soft-start, but no logic-level shutdown pin | Higher frequency reduces inductor size but increases EMI filtering complexity; no direct SD pin replacement | Prefer for space-constrained designs needing <10µH inductors, but redesign shutdown interface |
Compared with LM2596S-ADJ and MP1584EN-LF-Z, AP1501A-K5G-U uniquely combines 5A integrated switching, logic-compatible shutdown, and thermal/current protection in a single TO263-5 package-making it optimal for industrial 5A point-of-load applications where reliability and minimal BOM count are prioritized over ultra-high frequency.
Availability
AP1501A-K5G-U is available at Aetrix Electronics and suitable for industrial PLC power supplies, automotive body control modules, telecom point-of-load converters, and LED driver bias supplies requiring stable component supply and long-term manufacturability.
Supply support for AP1501A-K5G-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, computing, and consumer markets.
The AP1501A series belongs to Diodes' high-current DC/DC converter product line, designed specifically for cost-sensitive, high-reliability step-down applications where integration, thermal robustness, and ease of implementation are critical.
FAQ
What is the maximum input voltage the AP1501A-K5G-U can safely handle?
The AP1501A-K5G-U has an absolute maximum input voltage rating of +45V, but its recommended operating range is 4.5V to 40V. Operation at 40V is supported across the full temperature range with proper thermal design. Exceeding 40V risks violating the recommended conditions and may accelerate parametric drift or trigger overvoltage stress on internal structures.
Can the AP1501A-K5G-U be used in adjustable-output configurations, and what is the minimum output voltage?
Yes, the AP1501A-K5G-U is the adjustable version and supports output voltages from 1.23V to 37V using an external resistor divider on the FB pin. The minimum output is set by the internal 1.23V reference; attempting lower outputs violates the feedback amplifier's common-mode range and causes regulation failure.
How does the SD pin function, and what logic levels activate shutdown?
The SD pin is a logic-compatible shutdown input: pulling it below 0.6V (typical) enables regulation, while pulling it above 2.0V (typical) disables the internal switch and reduces quiescent current to 150–250µA. The pin tolerates up to +40V, allowing direct connection to higher-voltage control rails without level-shifting.
Is the TO263-5 package thermally adequate for 5A continuous operation without a heatsink?
Yes-the TO263-5 package relies on PCB copper as its primary heatsink. With ≥2 inch² of 2 oz copper connected to the exposed tab, the AP1501A-K5G-U sustains 5A at 12VIN/5VOUT with junction temperature rise ≤40°C in still air. Smaller copper areas require derating or forced airflow per the thermal resistance data (θJA = 37°C/W).
AP1501A-K5G-U Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- 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:
- Surface Mount
- Supplier Device Package:
- TO-263-5
AP1501A-K5G-U FAQ
1.How can I place an order for AP1501A-K5G-U through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1501A-K5G-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 AP1501A-K5G-U reliable?
The price and inventory of AP1501A-K5G-U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1501A-K5G-U is usually 5 days.
3.What payment methods are accepted for AP1501A-K5G-U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1501A-K5G-U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1501A-K5G-U?
AP1501A-K5G-U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1501A-K5G-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 AP1501A-K5G-U?
For technical support, including AP1501A-K5G-U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1501A-K5G-U requirements.
6.How does Aetrix verify that AP1501A-K5G-U is sourced from the original manufacturer or authorized distributors?
All AP1501A-K5G-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 AP1501A-K5G-U meets industry standards.
7.What is the process for return or replacement of AP1501A-K5G-U?
All AP1501A-K5G-U units undergo pre-shipment inspection (PSI). If there is an issue with AP1501A-K5G-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 AP1501A-K5G-U part is unused and in its original packaging.
Return procedure for AP1501A-K5G-U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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