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Diodes Incorporated AP1512A-12K5L-13
- Part No.:
- AP1512A-12K5L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
AP1512A-12K5L-13.pdf
- Description:
- IC REG BUCK 12V 3A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,368
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Product details
Overview
AP1512A-12K5L-13 from Diodes Incorporated is a monolithic 50 kHz non-synchronous PWM buck DC/DC converter with integrated 3 A switch, fixed 12 V output, TO263-5L package, and logic-level ON/OFF shutdown control-designed for high-efficiency step-down regulation in industrial power supplies.
For engineers reviewing the AP1512A-12K5L-13 datasheet, AP1512A-12K5L-13 pinout, AP1512A-12K5L-13 application, or AP1512A-12K5L-13 equivalent, key selection criteria include its 60 V input rating, thermal shutdown protection, ±4% output voltage tolerance at 3 A load, and compatibility with standard 47 µH inductors and Schottky catch diodes.
Technical Context
The AP1512A-12K5L-13 implements voltage-mode PWM control with internal 1.235 V reference and frequency-compensated error amplifier, enabling stable regulation without external compensation components. Its fixed 50 kHz switching frequency (±15%) reduces filter size while maintaining low EMI in cost-sensitive designs.
It integrates a 3 A peak-current-rated N-channel MOSFET switch, thermal shutdown (150 °C typical), and current-limit protection (3.2–6 A range). The feedback pin accepts direct connection to resistor dividers for adjustable versions or ties directly to output for fixed 12 V operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12 V ±4% over 0.2–3 A load and 15–60 V input-ensures stable rail for microcontrollers and analog circuitry without external resistors. |
| Switching Frequency | 50 kHz ±15%-enables use of compact 33–47 µH inductors and reduces core loss vs. lower-frequency alternatives. |
| Input Voltage Range | 4.5 V to 60 V-supports wide-input industrial, automotive, and telecom power buses without pre-regulation. |
| Output Current | Continuous 3 A (AP1512A variant)-sufficient for powering FPGAs, DSPs, or multi-rail systems with single-stage conversion. |
| Efficiency | 80% at VIN = 30 V, VOUT = 12 V, IOUT = 3 A-minimizes thermal load in enclosed enclosures with limited airflow. |
| Shutdown Quiescent Current | 350 µA at VIN = 60 V-enables low-power standby in battery-backed or energy-harvesting applications. |
| Thermal Resistance | θJA = 23 °C/W (with 3 in² copper area)-requires ≥0.4 in² PCB copper pad under tab for safe 3 A operation at 85 °C ambient. |
Pinout & Package
AP1512A-12K5L-13 is housed in a surface-mount TO263-5L package with exposed metal tab (GND-connected) for thermal dissipation. The tab must be soldered to ≥0.4 in² of 2 oz copper for rated performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power input supply | Accepts 4.5–60 V; requires local 1 µF ceramic + bulk capacitor to suppress switching transients and supply peak currents. |
| OUTPUT (Pin 2) | Internal switch drain node | Swings between ~VIN–1.5 V (ON) and –0.5 V (OFF); connects to inductor input-keep trace short and narrow to limit EMI coupling. |
| GND (Pin 3) | Power and signal ground reference | Common return for IC core, switch source, and feedback network; tie directly to thermal pad and system ground plane. |
| FB (Pin 4) | Feedback voltage sense | Internally compared to 1.235 V reference; for fixed 12 V version, this pin is internally connected-no external divider needed. |
| SD (Pin 5) | Logic-level shutdown control | Drives regulator OFF when >1.3 V (up to 40 V), ON when <0.6 V; pull to GND for always-on operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3 A power switch | Eliminates external MOSFET and gate driver-reduces BOM count, layout area, and parasitic losses in buck stage. |
| Internal frequency compensation | Enables stable loop response with only output capacitor ESR >20 mΩ-no external compensation network required. |
| Thermal shutdown + current limit | Protects against sustained overload or poor heatsinking-latches off until junction cools below ~130 °C. |
| Logic-compatible shutdown (SD) | Accepts 0–40 V logic signals-allows direct interfacing with MCU GPIO, optocouplers, or system supervisors without level shifters. |
| Lead-free, RoHS-compliant TO263-5L | Meets EU Directive 2002/95/EC with exempted lead in die attach-qualified for industrial reflow profiles (J-STD-020). |
Applications
| Industrial PLC Power Supply | Automotive Body Control Module |
|---|---|
|
Use Scenario: Provides isolated 12 V rail from 24 V truck battery to power CAN transceivers and microcontroller peripherals. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 12 V at up to 3 A with input transient tolerance to 60 V load dump. Use Value: Withstands ISO 7637-2 pulse 5a (75 V/100 ms) due to 60 V absolute max input rating and built-in current limiting. |
Use Scenario: Powers infotainment display backlight drivers and sensor interface circuits from 12 V vehicle bus. IC Role / Device Role / Timing Role: Fixed-output DC/DC converter supplying clean 12 V rail with low quiescent current during sleep mode. Use Value: 350 µA shutdown current enables compliance with UNECE R100 Class 3 sleep current limits (<1 mA) for parked vehicle systems. |
| Telecom Remote Radio Unit | Factory Automation I/O Module |
|
Use Scenario: Generates 12 V bias for RF power amplifiers in outdoor small-cell base stations operating at –40 to +85 °C. IC Role / Device Role / Timing Role: High-reliability buck converter with thermal shutdown and current limit-critical for unattended remote sites. Use Value: Maintains regulation across full temperature range with no derating up to 85 °C ambient, verified by efficiency vs. temperature curves. |
Use Scenario: Supplies 12 V to isolated digital I/O channels and fieldbus transceivers in modular programmable logic controllers. IC Role / Device Role / Timing Role: Central point-of-load regulator converting 24 V backplane to localized 12 V distribution. Use Value: TO263-5L package allows direct mounting to aluminum chassis for passive cooling-eliminates need for discrete heatsinks. |
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 |
|---|---|---|---|
| LM2596S-12/NOPB | 3 A, 150 kHz, requires external compensation; ±2% output tolerance; no integrated SD pin. | Lacks logic-level shutdown-requires external transistor for enable control; higher switching frequency demands smaller inductors but increases EMI filtering complexity. | Choose if tighter output tolerance (±2%) and higher frequency are prioritized over integrated shutdown simplicity. |
| MP1584EN-LF-Z | 3 A, 1.5 MHz, adjustable-only output; requires external feedback resistors; 2.5–28 V input. | Not pin-compatible; lacks fixed 12 V option-requires redesign of feedback network and may increase layout risk for noise-sensitive applications. | Prefer for space-constrained designs needing 1.5 MHz operation, but avoid when fixed 12 V and minimal external parts are mandatory. |
Compared with LM2596S-12/NOPB and MP1584EN-LF-Z, AP1512A-12K5L-13 delivers plug-and-play 12 V regulation with integrated shutdown and no external compensation-reducing design cycle time and validation effort for industrial 50 kHz buck implementations.
Availability
AP1512A-12K5L-13 is available at Aetrix Electronics and suitable for industrial PLC power supplies, automotive body control modules, and telecom remote radio units requiring stable component supply with full RoHS compliance and long-term manufacturability.
Supply support for AP1512A-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 analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial and automotive markets.
The AP1512/A series belongs to Diodes' legacy high-voltage buck regulator product line, designed specifically for cost-sensitive, thermally constrained applications where integration, ruggedness, and ease of use outweigh ultra-high efficiency or MHz switching.
FAQ
What is the maximum input voltage the AP1512A-12K5L-13 can withstand continuously?
The AP1512A-12K5L-13 supports continuous operation up to +60 V input, with an absolute maximum rating of +63 V. It is rated for industrial and automotive environments where load dump transients occur, and its internal current limit and thermal shutdown protect against damage during overvoltage events within these limits.
Does the AP1512A-12K5L-13 require external compensation components?
No. The AP1512A-12K5L-13 features fully internal frequency compensation, eliminating the need for external capacitors or resistors in the feedback loop. Stability is guaranteed across all operating conditions when using recommended output capacitor ESR ≥20 mΩ and standard 47 µH inductors.
Can the AP1512A-12K5L-13 be used in adjustable-output configurations?
No. The AP1512A-12K5L-13 is a fixed 12 V output variant. Only part numbers ending in "ADJ" (e.g., AP1512A-ADJK5L-13) support adjustable outputs via external resistor dividers on the FB pin. This part has the feedback network internally configured for 12 V.
What thermal management is required for full 3 A operation?
For continuous 3 A output at 85 °C ambient, the TO263-5L package requires ≥0.4 in² of 2 oz copper connected to the exposed tab. Performance data shows θJA = 23 °C/W with 3 in² copper; insufficient copper area will cause thermal shutdown above ~2 A at elevated temperatures.
AP1512A-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):
- 60V
- Voltage - Output (Min/Fixed):
- 12V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- Frequency - Switching:
- 50kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263-5
AP1512A-12K5L-13 FAQ
1.How can I place an order for AP1512A-12K5L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1512A-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 AP1512A-12K5L-13 reliable?
The price and inventory of AP1512A-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 AP1512A-12K5L-13 is usually 5 days.
3.What payment methods are accepted for AP1512A-12K5L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1512A-12K5L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1512A-12K5L-13?
AP1512A-12K5L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1512A-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 AP1512A-12K5L-13?
For technical support, including AP1512A-12K5L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1512A-12K5L-13 requirements.
6.How does Aetrix verify that AP1512A-12K5L-13 is sourced from the original manufacturer or authorized distributors?
All AP1512A-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 AP1512A-12K5L-13 meets industry standards.
7.What is the process for return or replacement of AP1512A-12K5L-13?
All AP1512A-12K5L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1512A-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 AP1512A-12K5L-13 part is unused and in its original packaging.
Return procedure for AP1512A-12K5L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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