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Diodes Incorporated AP1501A-K5L-13
- Part No.:
- AP1501A-K5L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
AP1501A-K5L-13.pdf
- Description:
- IC REG BUCK ADJ 5A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,577
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Product details
Overview
AP1501A-K5L-13 from Diodes Incorporated is a monolithic 150kHz, 5A non-synchronous PWM buck DC/DC converter with integrated power switch, fixed 5V output, TO263-5 package, thermal shutdown and current-limit protection, and logic-level ON/OFF control - used in industrial power supplies requiring high-efficiency step-down regulation from 8–40V input to stable 5V/5A output.
For engineers reviewing the AP1501A-K5L-13 datasheet, AP1501A-K5L-13 pinout, AP1501A-K5L-13 application, or AP1501A-K5L-13 equivalent, key selection criteria include its ±4% output voltage tolerance at full load, 150kHz ±15% switching frequency, built-in 5A switch, thermal shutdown threshold, and compatibility with standard external Schottky diode and 22µH inductor in minimal BOM designs.
Technical Context
The AP1501A-K5L-13 implements voltage-mode PWM control with an internal 1.23V reference and 150kHz oscillator, enabling stable regulation without external compensation components. Its feedback loop monitors output via the FB pin and adjusts duty cycle to maintain 5V ±4% across 0.2–5A load and 8–40V input range.
It integrates a 5A N-channel MOSFET switch with 1.5–1.7V saturation voltage, supports logic-level shutdown (SD pin active-low at ≤1.3V), and includes cycle-by-cycle current limiting (6.0A typ) and thermal shutdown (TJ >125°C). The TO263-5 package features exposed metal tab tied to GND for thermal conduction into PCB copper.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% over 0.2–5A load and 8–40V input - ensures stable rail for microcontrollers and logic without external resistor divider. |
| Switching Frequency | 150kHz ±15% - enables use of compact 22µH inductors and reduces EMI compared to lower-frequency buck converters. |
| Output Current | 5A continuous - supports high-power embedded systems without external pass transistor or parallel ICs. |
| Input Voltage Range | 4.5V to 40V - accommodates wide-input industrial, automotive, and telecom supply rails including 12V/24V nominal buses. |
| Efficiency | 78% typical at VIN=12V, VOUT=5V, IOUT=5A - minimizes thermal load and simplifies heatsinking in space-constrained layouts. |
| Shutdown Quiescent Current | 150–250µA at VIN=40V - enables ultra-low-power standby mode for battery-backed or energy-sensitive applications. |
| Thermal Protection | Internal thermal shutdown above TJ = 125°C - prevents permanent damage during overload or poor PCB thermal design. |
Pinout & Package
AP1501A-K5L-13 uses the TO263-5 (D²PAK) surface-mount package with exposed metal tab soldered to PCB ground plane for thermal dissipation. Thermal resistance θJA is 37°C/W with 3in² 1oz copper; θJC is 6°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Positive input supply | Accepts 4.5–40V DC; requires local ceramic bypass capacitor to handle high di/dt switching currents. |
| 2 - Output | Switching node | Drives external Schottky diode and inductor; voltage swings between (VIN – VSAT) and ~–0.5V; minimal copper area recommended to reduce EMI coupling. |
| 3 - Gnd | Power and signal ground | Common return for internal circuitry, feedback network, and exposed metal tab - must connect directly to low-impedance PCB ground plane. |
| 4 - FB | Voltage feedback input | Monitors regulated output via resistive divider (not required for fixed 5V version); internal 1.23V reference sets regulation point. |
| 5 - SD | Shutdown control | Logic-level input: ≤1.3V = ON, ≥2.0V = OFF; sinks 15–25µA when pulled high; open or grounded = always ON. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5A power switch | Eliminates need for external MOSFET and gate driver - reduces BOM count, layout area, and design complexity. |
| Internal compensation | Enables stable regulation with no external compensation components - simplifies design validation and improves production yield. |
| Logic-compatible shutdown | Direct interface with MCU GPIO or system supervisor ICs without level-shifting - supports coordinated power sequencing. |
| Thermal and current protection | Prevents catastrophic failure under short-circuit, overtemperature, or excessive load - enhances system reliability without external monitoring. |
| RoHS-compliant & halogen-free | Fully lead-free, antimony-free, and <900ppm Br+Cl - meets global environmental compliance requirements for industrial and consumer products. |
Applications
| Industrial PLC Power Supply | Embedded System Main Rail |
|---|---|
|
Use Scenario: Providing clean 5V/5A main power to programmable logic controller (PLC) CPU modules operating from 24V DC field bus. IC Role / Device Role / Timing Role: Primary buck regulator converting unregulated 24V input to isolated 5V logic rail with tight line/load regulation. Use Value: Delivers 78% efficiency at full load and withstands 40V transients per IEC 61000-4-5, reducing thermal stress on enclosure-mounted PCBs. |
Use Scenario: Generating 5V core power for ARM-based industrial gateway with Ethernet, RS-485, and flash storage interfaces. IC Role / Device Role / Timing Role: Non-synchronous buck controller managing high-current digital rail with logic-controlled soft-start via SD pin. Use Value: Enables rapid system wake-up (<100µs startup delay) and deep sleep mode (250µA quiescent) for battery-buffered operation. |
| Automotive Body Control Module | Point-of-Load Converter |
|
Use Scenario: Regulating 12V vehicle battery to stable 5V for body control unit (BCU) microcontroller and CAN transceiver. IC Role / Device Role / Timing Role: Input-filter-tolerant buck converter handling cold-crank (4.5V) and load-dump (40V) conditions per ISO 7637-2. Use Value: Maintains regulation across full automotive temperature range (–20°C to +85°C ambient) with ±4% output accuracy. |
Use Scenario: Local 5V conversion on dense multilayer PCB near FPGA or SoC requiring low-noise, high-current supply. IC Role / Device Role / Timing Role: Compact footprint (TO263-5) buck stage placed adjacent to load to minimize IR drop and EMI radiation. Use Value: Exposed GND tab enables direct thermal connection to inner-layer ground planes - achieves 37°C/W θJA without heatsink. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 5A fixed-output buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP1501A-50K5G-13 | Same die, identical electrical specs, RoHS-compliant "Green" packaging (halogen/antimony-free), tape-and-reel delivery. | Direct replacement with updated environmental compliance and modern packaging - supported for new designs. | Select for new designs requiring full halogen-free compliance and long-term supply continuity. |
| LM2596S-5.0/NOPB | 3A rated, 150kHz fixed frequency, adjustable version only; requires external feedback resistors even for 5V; higher VSAT (~1.8V). | Limited to ≤3A loads; less efficient at 5A due to higher conduction loss; lacks integrated 5A switch architecture. | Use only if 3A output suffices and legacy LM2596 footprint compatibility is mandatory. |
Compared with AP1501A-K5L-13, the AP1501A-50K5G-13 offers identical performance with enhanced environmental compliance and active production status, while the LM2596S-5.0/NOPB delivers lower current capability and reduced integration - making the K5G variant the preferred upgrade path for new designs.
Availability
AP1501A-K5L-13 is available at Aetrix Electronics and suitable for industrial PLC power supplies, embedded system main rails, and automotive body control modules requiring stable component supply with known end-of-life status and documented migration path.
Supply support for AP1501A-K5L-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 AP1501A belongs to Diodes' monolithic buck converter product line, designed specifically for cost-sensitive, high-current DC/DC applications where integration, reliability, and thermal robustness are critical.
FAQ
Is AP1501A-K5L-13 still in production?
No - AP1501A-K5L-13 is End of Life per Diodes Incorporated's ordering information (Note 6). Its direct replacement is AP1501A-50K5G-13, which shares identical electrical specifications, TO263-5 packaging, and full halogen-free compliance. Aetrix Electronics maintains legacy stock and supports transition planning to the G-13 variant.
What external components are required for AP1501A-K5L-13?
Four external components are mandatory: input ceramic capacitor (≥100µF, low-ESR), output bulk capacitor (≥220µF, low-ESR), Schottky catch diode (≥3A, ≤0.55V VF), and power inductor (22µH, ≥6A saturation current). No feedback resistors are needed for the fixed 5V version.
Can AP1501A-K5L-13 operate with 40V input continuously?
Yes - the absolute maximum VIN rating is +45V, and recommended operating range extends to 40V. However, at 40V input and 5A output, thermal management becomes critical: θJA must be ≤30°C/W (requiring ≥6in² 2oz copper or forced airflow) to maintain TJ ≤125°C per datasheet thermal curves.
Does AP1501A-K5L-13 require a minimum load to regulate?
No - the AP1501A series maintains regulation from zero load up to 5A. The feedback amplifier remains active across the full load range, and no minimum load resistor is specified in the datasheet. Efficiency drops below ~0.2A, but output voltage stays within ±4% tolerance.
AP1501A-K5L-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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 1.23V
- Voltage - Output (Max):
- 37V
- Current - Output:
- 5A
- 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
AP1501A-K5L-13 FAQ
1.How can I place an order for AP1501A-K5L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1501A-K5L-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 AP1501A-K5L-13 reliable?
The price and inventory of AP1501A-K5L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1501A-K5L-13 is usually 5 days.
3.What payment methods are accepted for AP1501A-K5L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1501A-K5L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1501A-K5L-13?
AP1501A-K5L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1501A-K5L-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 AP1501A-K5L-13?
For technical support, including AP1501A-K5L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1501A-K5L-13 requirements.
6.How does Aetrix verify that AP1501A-K5L-13 is sourced from the original manufacturer or authorized distributors?
All AP1501A-K5L-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 AP1501A-K5L-13 meets industry standards.
7.What is the process for return or replacement of AP1501A-K5L-13?
All AP1501A-K5L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1501A-K5L-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 AP1501A-K5L-13 part is unused and in its original packaging.
Return procedure for AP1501A-K5L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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