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Diodes Incorporated AP1512-12K5L-13
- Part No.:
- AP1512-12K5L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
AP1512-12K5L-13.pdf
- Description:
- IC REG BUCK 12V 2A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,513
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Product details
Overview
AP1512-12K5L-13 from Diodes Incorporated is a monolithic 50 kHz non-synchronous PWM buck DC/DC converter in TO263-5L package, delivering fixed 12 V output at up to 2 A load current with ±4% output voltage tolerance, 4.5–60 V input range, and integrated thermal shutdown and current limit protection. It serves as a compact, self-contained step-down regulator for industrial power rails.
For engineers reviewing the AP1512-12K5L-13 datasheet, AP1512-12K5L-13 pinout, AP1512-12K5L-13 application, or AP1512-12K5L-13 equivalent, key selection criteria include its fixed 12 V output, 2 A continuous load capability, 50 kHz switching frequency enabling low-cost magnetics, ON/OFF logic-controlled shutdown, and TO263-5L thermal performance with θJA = 23 °C/W on 3 in² copper.
Technical Context
The AP1512-12K5L-13 implements voltage-mode PWM control with an internal 1.235 V reference and error amplifier, operating at a fixed 50 kHz ±15% oscillator frequency. Its non-synchronous architecture integrates a 2 A N-channel MOSFET switch and uses external diode rectification.
Feedback is closed via the FB pin monitoring output through a resistive divider (not required for fixed 12 V version), while SD pin accepts 0–1.3 V (ON) or ≥2.0 V (OFF) logic-level signals to enable/disable regulation. Internal compensation eliminates need for external loop components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12 V ±4% across 0.2–2 A load and 15–60 V input ensures stable rail for microcontrollers and analog circuitry. |
| Switching Frequency | 50 kHz ±15% enables use of low-cost, high-saturation-current inductors (e.g., 33–47 µH) without EMI filtering complexity. |
| Input Voltage Range | 4.5 V to 60 V supports wide-input applications including automotive battery (12 V/24 V systems) and industrial 48 V buses. |
| Continuous Output Current | 2 A maximum at TA ≤ 85 °C with proper PCB copper area (≥3 in²) ensures reliable operation without external current boosting. |
| Quiescent Current | 5–10 mA in active mode and 350 µA in standby reduces system power loss during idle periods. |
| Thermal Protection | Integrated thermal shutdown activates above TJ ≈ 125 °C, preventing latch-up or permanent damage under overload or poor heatsinking. |
| Current Limit Threshold | 2.5–5.5 A peak current limit protects against short-circuit faults while allowing inrush current for capacitive loads. |
Pinout & Package
AP1512-12K5L-13 is housed in a surface-mount TO263-5L (D2PAK) package with exposed metal tab electrically connected to GND for thermal conduction. The tab must be soldered to ≥3 in² of 2 oz copper for rated 2 A operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Positive input supply | Accepts 4.5–60 V DC; requires local 1 µF ceramic bypass capacitor to suppress switching transients. |
| OUTPUT (Pin 2) | Internal power switch drain | Drives external catch diode and inductor; high dv/dt node requiring minimal PCB copper area to reduce EMI coupling. |
| GND (Pin 3) | Power and signal ground | Common return for VIN, OUTPUT, FB, and SD; connects to exposed metal tab for thermal path to PCB copper. |
| FB (Pin 4) | Feedback input | Internally tied to 12 V divider for fixed-output version; unused but must remain unconnected (no external resistor needed). |
| SD (Pin 5) | Shutdown control | Logic-compatible input: <1.3 V enables regulation; >2.0 V disables output and reduces IQ to 350 µA. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 2 A power switch | Eliminates need for external MOSFET and gate driver, reducing BOM count and board space in point-of-load designs. |
| Internal compensation network | Enables stable regulation with no external compensation components-simplifies design and improves production yield. |
| Logic-level ON/OFF control | Direct interface with MCU GPIO or system supervisor ICs without level-shifting circuitry. |
| ±4% output voltage tolerance | Meets tight regulation requirements for digital logic supplies (e.g., FPGA I/O banks, microcontroller cores) without post-regulation LDOs. |
| Lead-free and RoHS-compliant | Meets EU Directive 2002/95/EC with exemptions applied; suitable for commercial and industrial environmental compliance programs. |
Applications
| Industrial PLC Power Supply | Automotive Body Control Module |
|---|---|
|
Use Scenario: Providing regulated 12 V rail from 24 V vehicle battery to power microcontrollers, CAN transceivers, and sensor interfaces. IC Role / Device Role / Timing Role: Primary buck regulator converting unregulated battery voltage to stable 12 V supply with logic-controlled sleep mode. Use Value: 2 A output sustains multiple peripherals; 350 µA standby current extends battery life during ignition-off periods. |
Use Scenario: Generating 12 V for interior lighting drivers and door lock actuators in 12 V automotive systems. IC Role / Device Role / Timing Role: High-input-voltage buck converter handling cold-crank (4.5 V) to load-dump (60 V) transients per ISO 7637-2. Use Value: 60 V absolute max input rating and thermal shutdown prevent failure during load dump events without external clamping. |
| Point-of-Load Converter for Industrial Sensors | Legacy Equipment Retrofit Power |
|
Use Scenario: Replacing aging linear regulators in factory-floor temperature/humidity sensors requiring clean 12 V at ~1.5 A. IC Role / Device Role / Timing Role: Efficient switching replacement for LM7812, reducing heat sink size and improving reliability. Use Value: 83% efficiency at 30 VIN/2 AOUT cuts power dissipation by >75% versus linear solution, eliminating forced cooling. |
Use Scenario: Upgrading obsolete discrete-switcher power supplies in legacy test equipment with single-chip solution. IC Role / Device Role / Timing Role: Drop-in compatible replacement for multi-component 12 V buck designs using TO220-based controllers. Use Value: TO263-5L footprint and pinout simplify PCB redesign; fixed 12 V output removes need for feedback resistor layout. |
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 rated, 150 kHz switching, requires external compensation and feedback resistors even for fixed 12 V. | Higher frequency allows smaller inductors but increases EMI sensitivity; lacks integrated thermal shutdown flag. | Choose when higher output current or smaller magnetics are prioritized over board area and thermal safety features. |
| MP1584EN-LF-Z | 3 A rated, 1.5 MHz switching, adjustable-only output; requires external 12 V feedback divider and compensation. | Better light-load efficiency but demands precise resistor matching for 12 V accuracy; no built-in current limit reporting. | Prefer when PCB space is constrained and design team has expertise in high-frequency loop compensation. |
Compared with LM2596S-12/NOPB and MP1584EN-LF-Z, AP1512-12K5L-13 offers simpler implementation (no feedback resistors), guaranteed ±4% 12 V accuracy without trimming, and integrated thermal/current fault protection-reducing validation effort for industrial and automotive applications where reliability outweighs ultra-high switching frequency.
Availability
AP1512-12K5L-13 is available at Aetrix Electronics and suitable for industrial PLC power supplies, automotive body control modules, point-of-load converters for sensors, and legacy equipment retrofit requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for AP1512-12K5L-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, automotive, and consumer markets.
The AP1512 product line delivers cost-optimized, thermally robust buck regulators targeting applications where simplicity, ruggedness, and wide input range outweigh ultra-high efficiency or MHz-class switching.
FAQ
What is the minimum input voltage required for AP1512-12K5L-13 to regulate 12 V output?
The AP1512-12K5L-13 requires a minimum input voltage of 4.5 V to initiate startup and sustain regulation. However, for stable 12 V output under full 2 A load, VIN must exceed 15 V per the recommended operating conditions table-due to dropout constraints of the internal switch and saturation voltage (~1.4 V).
Can AP1512-12K5L-13 be used with an input voltage higher than 60 V?
No. The absolute maximum VIN rating is +63 V, but the recommended operating range is strictly 4.5–60 V. Exceeding 60 V risks exceeding safe operating area limits of the internal switch and may trigger premature thermal shutdown or irreversible damage-even if within the 63 V absolute maximum.
Is the FB pin connected internally for the fixed 12 V version?
Yes. In AP1512-12K5L-13, the FB pin is internally connected to a precision resistive divider that sets the output to 12 V. It must be left unconnected (floating) in the circuit-no external resistors or capacitors are permitted or required.
Does AP1512-12K5L-13 support synchronous rectification?
No. AP1512-12K5L-13 uses non-synchronous rectification and requires an external Schottky catch diode (e.g., B360/B). It does not provide a second gate drive output or timing control for a synchronous MOSFET, and no internal circuitry supports synchronous operation.
AP1512-12K5L-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:
- 2A
- 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
AP1512-12K5L-13 FAQ
1.How can I place an order for AP1512-12K5L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1512-12K5L-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 AP1512-12K5L-13 reliable?
The price and inventory of AP1512-12K5L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1512-12K5L-13 is usually 5 days.
3.What payment methods are accepted for AP1512-12K5L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1512-12K5L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1512-12K5L-13?
AP1512-12K5L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1512-12K5L-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 AP1512-12K5L-13?
For technical support, including AP1512-12K5L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1512-12K5L-13 requirements.
6.How does Aetrix verify that AP1512-12K5L-13 is sourced from the original manufacturer or authorized distributors?
All AP1512-12K5L-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 AP1512-12K5L-13 meets industry standards.
7.What is the process for return or replacement of AP1512-12K5L-13?
All AP1512-12K5L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1512-12K5L-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 AP1512-12K5L-13 part is unused and in its original packaging.
Return procedure for AP1512-12K5L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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