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Diodes Incorporated AP1512A-50K5L-13
- Part No.:
- AP1512A-50K5L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- -
- Datasheet:
-
AP1512A-50K5L-13.pdf
- Description:
- IC REG BUCK 5V 3A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:840
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Product details
Overview
AP1512A-50K5L-13 from Diodes Incorporated is a monolithic 50 kHz non-synchronous PWM buck DC/DC converter with integrated 3 A switch, fixed 5.0 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-50K5L-13 datasheet, AP1512A-50K5L-13 pinout, AP1512A-50K5L-13 application, or AP1512A-50K5L-13 equivalent, key selection criteria include its 5.0 V ±4% output tolerance, 60 V max input voltage, thermal shutdown protection, and compatibility with standard 47 µH inductors and B360/B Schottky catch diodes in compact PCB layouts.
Technical Context
The AP1512A-50K5L-13 implements voltage-mode PWM control with internal 1.235 V reference and fixed 50 kHz oscillator (±15%). It uses a single external feedback resistor for fixed-output versions and requires no external compensation network due to built-in frequency compensation.
Its internal 3 A N-channel MOSFET switch operates with 1.3–1.5 V saturation voltage at 3 A load, and shutdown is asserted by pulling the SD pin above 2.0 V, reducing quiescent current to 350 µA. Thermal shutdown activates at junction temperatures exceeding 125 °C, with θJA = 23 °C/W on 3 in² copper.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±4% (guaranteed across 0.2–3 A load and −20 to +85 °C ambient) |
| Switching Frequency | 50 kHz ±15% (enables use of low-cost, low-ESR 47 µH inductors and reduces EMI filtering burden) |
| Input Voltage Range | 4.5 V to 60 V (supports wide-input industrial and automotive battery-fed systems) |
| Output Current | 3 A continuous (with thermal derating above 85 °C ambient on standard PCB layout) |
| Shutdown Quiescent Current | 350 µA at VIN = 60 V (enables ultra-low-power standby in always-on subsystems) |
| Feedback Reference | 1.235 V internal bandgap (eliminates need for external divider in fixed-output configuration) |
| Thermal Protection | Integrated junction temperature shutdown (>125 °C) with automatic recovery on cooldown |
Pinout & Package
AP1512A-50K5L-13 is housed in a surface-mount TO263-5L package with exposed metal tab (GND-connected) for thermal conduction to PCB copper. The 5-pin top-view layout supports high-current switching with minimal trace inductance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Positive input supply rail | Accepts 4.5–60 V; requires local 1 µF ceramic bypass capacitor to suppress switching transients |
| OUTPUT (Pin 2) | Internal power switch drain | Swings between VIN−1.5 V and −0.5 V; connects directly to inductor input-must minimize copper area to reduce EMI coupling |
| GND (Pin 3) | Power and signal ground reference | Common return for internal regulator, feedback amplifier, and thermal sensor; tied to exposed metal tab |
| FB (Pin 4) | Output voltage feedback node | Internally referenced to 1.235 V; left unconnected in fixed 5.0 V version (AP1512A-50) |
| SD (Pin 5) | Logic-level shutdown control | Active-high: ≥2.0 V disables switching and drops IQ to 350 µA; ≤0.6 V enables regulation |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3 A power switch | Eliminates external MOSFET and gate driver, reducing BOM count and layout complexity |
| Fixed 5.0 V output with ±4% tolerance | Meets tight regulation requirements for microcontroller I/O rails and analog subsystems without trimming |
| Non-synchronous buck architecture | Enables use of low-forward-voltage Schottky diodes (e.g., B360/B) for cost-sensitive designs |
| Lead-free, RoHS-compliant TO263-5L | Supports automated reflow assembly and meets global environmental compliance mandates |
| Thermal and current-limit protection | Prevents latch-up or destruction during overload, short-circuit, or inadequate heatsinking |
Applications
| Industrial PLC Power Rails | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Providing stable 5.0 V supply to microcontrollers and CAN transceivers in programmable logic controllers operating from 12–48 V DC bus. IC Role / Device Role / Timing Role: Primary step-down regulator delivering regulated 5 V at up to 3 A with line/load regulation < ±1%. Use Value: Enables single-stage conversion from wide-input industrial bus without intermediate 12 V stage-reducing component count and board space by 30% versus two-stage solutions. |
Use Scenario: Powering 5 V logic and sensors in body control units powered by vehicle battery (9–16 V nominal, up to 60 V load dump). IC Role / Device Role / Timing Role: Input-tolerant buck converter with thermal shutdown, handling transient overvoltage events without latch-up. Use Value: Survives ISO 7637-2 pulse 5a (60 V/100 ms) without external TVS, reducing system protection BOM cost by $0.18 per unit. |
| Point-of-Load Telecom Supplies | Outdoor LED Driver Bias Rails |
|
Use Scenario: Generating 5 V bias for optical transceiver modules in access switches operating from 48 V PoE-derived rails. IC Role / Device Role / Timing Role: High-efficiency (80% at 3 A) buck regulator with 50 kHz switching optimized for low-profile inductors. Use Value: Achieves >80% efficiency at full 3 A load across −20 to +85 °C, eliminating need for forced air cooling in sealed enclosures. |
Use Scenario: Supplying 5 V control logic for constant-current LED drivers in streetlight fixtures exposed to −40 to +125 °C ambient extremes. IC Role / Device Role / Timing Role: Robust DC/DC converter with guaranteed operation to 125 °C junction temperature and thermal foldback. Use Value: Maintains regulation through thermal cycling without derating until TJ > 125 °C-enabling smaller heatsinks and longer field life vs. 85 °C-rated alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596T-5.0 | 3 A rated, 150 kHz switching, requires external compensation; ±2% output tolerance | Higher frequency allows smaller inductors but increases EMI filtering complexity | Preferred when tighter output tolerance or higher efficiency at light loads is required |
| MP1584EN-LF-Z | 3 A rated, 1.5 MHz switching, synchronous rectification; ±1.5% output tolerance | Higher frequency and sync rectification improve light-load efficiency but raise cost | Selected when PCB area is constrained and efficiency above 10% load matters most |
Compared with LM2596T-5.0 and MP1584EN-LF-Z, AP1512A-50K5L-13 offers lower EMI signature due to 50 kHz operation, simpler layout (no compensation network), and superior thermal robustness in high-ambient environments-making it optimal for space-constrained industrial enclosures where reliability trumps peak efficiency.
Availability
AP1512A-50K5L-13 is available at Aetrix Electronics and suitable for industrial PLC power rails, automotive body control modules, and outdoor LED driver bias rails requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP1512A-50K5L-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 computing markets.
AP1512A belongs to Diodes' legacy high-voltage buck regulator product line, engineered for ruggedized 48 V and 60 V input applications where thermal resilience and input surge tolerance outweigh ultra-high-frequency switching benefits.
FAQ
What is the maximum input voltage rating for AP1512A-50K5L-13?
The absolute maximum input voltage is +63 V, with recommended operating range from +4.5 V to +60 V. This rating enables direct connection to 48 V industrial buses and survival of ISO 7637-2 load-dump transients up to 60 V for 100 ms without external clamping.
Does AP1512A-50K5L-13 require external compensation components?
No-AP1512A-50K5L-13 integrates full frequency compensation circuitry. Its fixed 5.0 V output version needs only input/output capacitors, inductor, and catch diode. No external RC networks or compensation pins are required for stable operation across all load and line conditions.
How does the shutdown (SD) pin function in AP1512A-50K5L-13?
The SD pin is active-high: applying ≥2.0 V disables switching and reduces quiescent current to 350 µA; ≤0.6 V enables regulation. If unused, SD may be tied to GND or left floating-both states default to ON mode. The pin tolerates up to +40 V, enabling direct interface with 24 V control logic.
What thermal performance can be expected with AP1512A-50K5L-13 on a standard PCB?
With 3 in² of 2 oz copper connected to the TO263-5L tab, θJA is 23 °C/W. At 3 A load and 30 V input, junction temperature rise is ~69 °C above ambient-keeping TJ below 125 °C up to +56 °C ambient. Larger copper areas further reduce thermal resistance.
AP1512A-50K5L-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- 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:
- -
- Supplier Device Package:
- -
AP1512A-50K5L-13 FAQ
1.How can I place an order for AP1512A-50K5L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1512A-50K5L-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-50K5L-13 reliable?
The price and inventory of AP1512A-50K5L-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-50K5L-13 is usually 5 days.
3.What payment methods are accepted for AP1512A-50K5L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1512A-50K5L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1512A-50K5L-13?
AP1512A-50K5L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1512A-50K5L-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-50K5L-13?
For technical support, including AP1512A-50K5L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1512A-50K5L-13 requirements.
6.How does Aetrix verify that AP1512A-50K5L-13 is sourced from the original manufacturer or authorized distributors?
All AP1512A-50K5L-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-50K5L-13 meets industry standards.
7.What is the process for return or replacement of AP1512A-50K5L-13?
All AP1512A-50K5L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1512A-50K5L-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-50K5L-13 part is unused and in its original packaging.
Return procedure for AP1512A-50K5L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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