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Diodes Incorporated AP1501A-12K5L-13
- Part No.:
- AP1501A-12K5L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
AP1501A-12K5L-13.pdf
- Description:
- IC REG BUCK 12V 5A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:800
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Product details
Overview
AP1501A-12K5L-13 from Diodes Incorporated is a monolithic 150kHz, 5A non-synchronous PWM buck DC/DC converter with fixed 12V output, integrated power switch, thermal shutdown, and current-limit protection. It operates from 15V to 40V input, delivers ±4% output voltage accuracy under load, and uses TO263-5 surface-mount packaging for high-power density in industrial power supplies.
For engineers reviewing the AP1501A-12K5L-13 datasheet, AP1501A-12K5L-13 pinout, AP1501A-12K5L-13 application, or AP1501A-12K5L-13 equivalent, key selection criteria include its 12V fixed output, 5A continuous load capability, 150kHz switching frequency, ON/OFF shutdown control, and thermal performance in TO263-5 layout with PCB copper heatsinking.
Technical Context
The AP1501A-12K5L-13 implements voltage-mode PWM control with an internal 1.23V reference and 150kHz oscillator (±15%). Its feedback loop uses a single-resistor connection to the FB pin for fixed-output variants, eliminating external compensation components.
It integrates a 5A DMOS power switch with 1.5V typical saturation voltage at full load, supports logic-level shutdown via the SD pin (1.3V threshold), and features built-in thermal shutdown and cycle-by-cycle current limiting to protect against overtemperature and overload conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12V ±4% across 0.2A–5A load and 15V–40V input |
| Switching Frequency | 150kHz ±15%; enables compact LC filter design with ~22µH inductors |
| Continuous Output Current | 5A; supported by integrated DMOS switch and TO263-5 thermal path |
| Input Voltage Range | 15V to 40V; compatible with 24V industrial rails and 36V battery systems |
| Feedback Reference Voltage | 1.23V internal reference; sets regulated output without external divider for fixed versions |
| Shutdown Quiescent Current | 150–250µA at VIN = 40V; enables low-power standby mode |
| Thermal Resistance θJA | 37°C/W (TO263-5, 3in² copper); requires ≥0.8in² 2oz PCB copper for thermal management |
Pinout & Package
AP1501A-12K5L-13 is housed in a 5-lead TO263-5 surface-mount package with exposed metal tab electrically connected to GND for thermal and electrical grounding. The package requires minimum 0.8in² of 2oz copper on the PCB for safe 5A operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Positive input supply | Accepts 15–40V DC; requires local ceramic bypass capacitor to handle switching transients |
| 2 - Output | Switching node | Drives external catch diode and inductor; voltage swings between (VIN − 1.5V) and −0.5V |
| 3 - Gnd | Power and signal ground | Common return for internal circuitry, feedback, and shutdown; tied to exposed metal tab |
| 4 - FB | Feedback input | Internally biased to 1.23V; unused in fixed-12V version but must remain unconnected or grounded per datasheet |
| 5 - SD | Shutdown control | Logic-compatible input: <1.3V = ON, >2.0V = OFF; sinks ≤25µA when active |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5A DMOS switch | Eliminates external MOSFET and gate driver; reduces BOM count and layout area |
| Voltage-mode PWM control | Provides stable regulation without external compensation network across line/load variations |
| Thermal shutdown + current limit | Protects device during overload or poor heatsinking; auto-recovery after fault removal |
| ON/OFF logic shutdown | Reduces total input current to ≤250µA; enables system-level power sequencing and sleep modes |
| RoHS-compliant & halogen-free | Fully green construction (Br/Cl <1500ppm total, Sb <1000ppm); compliant with EU Directive 2011/65/EU |
Applications
| Industrial 24V-to-12V Conversion | Embedded System Power Rail |
|---|---|
|
Use Scenario: Converting 24V factory bus to regulated 12V for PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: Primary step-down regulator delivering clean, stable 12V at up to 5A with minimal external components. Use Value: Replaces discrete buck controllers + MOSFETs, reducing board space by >40% while maintaining ±4% output accuracy across temperature. |
Use Scenario: Powering FPGA core logic, microcontroller peripherals, and analog front-ends in ruggedized edge devices. IC Role / Device Role / Timing Role: Fixed-output DC/DC converter providing noise-immune 12V rail with fast transient response and thermal fault protection. Use Value: Enables reliable operation at 85°C ambient using standard PCB copper heatsinking-no external heatsink required. |
| Automotive Body Control Module | Test Equipment Power Supply |
|
Use Scenario: Generating 12V from 28V vehicle battery for body electronics (door locks, lighting drivers, CAN transceivers). IC Role / Device Role / Timing Role: High-input-voltage buck regulator with 40V absolute max rating and robust ESD (400V MM) tolerance. Use Value: Survives load-dump transients up to 40V without external clamping; shutdown pin enables ignition-controlled power gating. |
Use Scenario: Modular bench power supply unit delivering adjustable 12V/5A output for prototype validation and production test fixtures. IC Role / Device Role / Timing Role: Compact, self-contained switching regulator stage with low standby current for energy-efficient test automation. Use Value: Achieves >88% efficiency at 16VIN/5A, minimizing heat generation and cooling requirements in enclosed test enclosures. |
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 |
|---|---|---|---|
| AP1501A-12K5G-13 | Same silicon, identical electrical specs; RoHS-compliant "Green" variant replacing leaded L-suffix | Drop-in replacement with same TO263-5 footprint and thermal behavior; qualified for new designs | Select for all new designs-L-suffix is End-of-Life per Diodes' ordering table (Note 6) |
| LM2596S-12/NOPB | 3A rated, 150kHz, fixed 12V; requires external diode; higher dropout and lower efficiency at 5A | Suitable only for ≤3A loads; lacks integrated switch saturation optimization for high-current stability | Use only if 3A output suffices and legacy LM2596 footprint compatibility is required |
Compared with AP1501A-12K5L-13, the G-suffix variant offers identical performance with updated environmental compliance, while LM2596S-12/NOPB provides lower-cost support for sub-3A applications but cannot sustain 5A continuously without derating or thermal compromise.
Availability
AP1501A-12K5L-13 is available at Aetrix Electronics and suitable for industrial power conversion, embedded system power rails, and automotive body control modules requiring stable component supply and long-term manufacturability.
Supply support for AP1501A-12K5L-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 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, space-constrained applications needing integrated 5A buck regulation without external power switches.
FAQ
Is AP1501A-12K5L-13 still in production?
No-per Diodes' official ordering information (Note 6), all AP1501A-XXK5L variants are End-of-Life. The recommended replacement is AP1501A-12K5G-13, which shares identical electrical and mechanical specifications but complies with current RoHS and halogen-free standards.
What is the maximum input voltage for reliable operation?
The absolute maximum input voltage is +45V, but the recommended operating range is 15V to 40V for the 12V output version. Operation above 40V risks exceeding internal bias limits and may trigger premature thermal shutdown under sustained 5A load.
Can AP1501A-12K5L-13 be used in adjustable-output configurations?
No-it is a fixed 12V output variant. The FB pin is internally connected to the 12V regulation circuit and must not be externally modified. For adjustable output, use AP1501A-K5G-13 (ADJ version), which has a 1.23V reference and requires external resistor divider.
How should the TO263-5 thermal pad be connected on the PCB?
The exposed metal tab (pin 3/GND) must be soldered directly to ≥0.8in² of 2oz copper on the PCB, ideally with multiple thermal vias to inner ground planes. Do not isolate the tab-it serves as both thermal path and primary ground return for the power switch.
AP1501A-12K5L-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):
- 40V
- Voltage - Output (Min/Fixed):
- 12V
- Voltage - Output (Max):
- -
- 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-12K5L-13 FAQ
1.How can I place an order for AP1501A-12K5L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1501A-12K5L-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-12K5L-13 reliable?
The price and inventory of AP1501A-12K5L-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-12K5L-13 is usually 5 days.
3.What payment methods are accepted for AP1501A-12K5L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1501A-12K5L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1501A-12K5L-13?
AP1501A-12K5L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1501A-12K5L-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-12K5L-13?
For technical support, including AP1501A-12K5L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1501A-12K5L-13 requirements.
6.How does Aetrix verify that AP1501A-12K5L-13 is sourced from the original manufacturer or authorized distributors?
All AP1501A-12K5L-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-12K5L-13 meets industry standards.
7.What is the process for return or replacement of AP1501A-12K5L-13?
All AP1501A-12K5L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1501A-12K5L-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-12K5L-13 part is unused and in its original packaging.
Return procedure for AP1501A-12K5L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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