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Diodes Incorporated AP1512-50K5L-U
- Part No.:
- AP1512-50K5L-U
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
AP1512-50K5L-U.pdf
- Description:
- IC REG BUCK 5V 2A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,797
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Product details
Overview
AP1512-50K5L-U from Diodes Incorporated is a monolithic 50 kHz fixed-frequency voltage-mode PWM buck DC/DC converter in TO263-5L package, integrating a 2A internal N-channel MOSFET switch, thermal shutdown, and current-limit protection. It delivers regulated 5.0 V output at up to 2 A from 4.5–60 V input, with ±4% output voltage tolerance and built-in compensation for stable line/load regulation in industrial power supplies.
For engineers reviewing the AP1512-50K5L-U datasheet, AP1512-50K5L-U pinout, AP1512-50K5L-U application, or AP1512-50K5L-U equivalent, this device supports high-efficiency step-down conversion in space-constrained designs requiring logic-controlled ON/OFF, wide input range, and robust thermal/current protection without external transistor components.
Technical Context
The AP1512-50K5L-U implements non-synchronous voltage-mode PWM control with a fixed 50 kHz ±15% oscillator, enabling compact LC filter design. Its internal 2A switch features 1.3–1.5 V saturation voltage at full load and operates with duty cycle ranging from 0% (forced OFF) to 100% (forced ON).
Feedback is sensed via the FB pin using an internal 1.235 V reference; output voltage is set by external resistor divider. Shutdown is logic-level controlled (VIL ≤ 0.6 V, VIH ≥ 2.0 V), reducing quiescent current to 350 µA in standby mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% over 0.2–2 A load and 10–60 V input - ensures stable rail for microcontrollers and sensors. |
| Switching Frequency | 50 kHz ±15% - enables use of low-cost, low-ESR electrolytic capacitors and standard 47 µH inductors. |
| Max Output Current | 2 A continuous - supports mid-power embedded systems without external pass devices. |
| Input Voltage Range | 4.5 V to 60 V - accommodates 12 V/24 V/48 V industrial buses and automotive battery transients. |
| Efficiency | 83% at VIN = 30 V, VOUT = 5 V, IOUT = 2 A - minimizes thermal load on PCB copper heatsink area. |
| Thermal Resistance | θJA = 23 °C/W with ~3 in² copper - requires minimum 0.4 in² PCB copper pad under tab for safe operation at full load. |
| Shutdown Quiescent Current | 350 µA at VIN = 60 V - enables ultra-low-power system sleep states in battery-backed applications. |
Pinout & Package
AP1512-50K5L-U is housed in a surface-mount TO263-5L package with exposed metal tab (GND-connected) for thermal conduction to PCB copper. The 5-pin layout supports minimal external component count and high-current routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Positive input supply | Accepts 4.5–60 V; requires local 1 µF ceramic bypass capacitor to suppress switching transients. |
| OUTPUT | Internal N-MOSFET drain | Switches between (VIN – 1.5 V) and ≈ –0.5 V; connects to inductor input - minimize copper area to reduce EMI coupling. |
| GND | Power and signal ground | Common return for IC core, feedback, and shutdown; tied to exposed metal tab for thermal path. |
| FB | Feedback input | Senses output via resistor divider; internal 1.235 V reference sets 5.0 V output with R1/R2 = 3.04 kΩ/1.2 kΩ. |
| SD | Shutdown control | Logic-compatible input: ≤0.6 V = ON, ≥2.0 V = OFF; draws <10 µA - can be tied to GND if always enabled. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 2A power switch | Eliminates need for external MOSFET and gate driver - reduces BOM count and layout complexity. |
| Internal compensation network | Enables stable regulation across line/load/temperature without external compensation components. |
| Thermal shutdown + current limit | Protects against sustained overload or ambient overheating - latches off until reset by cycling VIN or SD. |
| Logic-level ON/OFF control | Supports direct interface with MCU GPIOs or system power sequencers without level-shifting circuitry. |
| Lead-free, RoHS-compliant TO263-5L | Meets EU Directive 2002/95/EC; compatible with standard reflow profiles and automated assembly. |
Applications
| Industrial PLC Power Supply | Automotive Body Control Module |
|---|---|
|
Use Scenario: Generating stable 5 V rail from 12–48 V vehicle battery or industrial 24 V bus under load dump and cold-crank conditions. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated 5 V for MCU, CAN transceivers, and sensor interfaces. Use Value: Withstands 60 V max input and includes thermal/current protection - avoids external crowbar circuits or derating. |
Use Scenario: On-board 5 V supply for body electronics (door modules, lighting controllers) in vehicles with wide battery voltage range. IC Role / Device Role / Timing Role: Non-synchronous buck converter delivering 2 A at 5 V with logic-controlled sleep mode during ignition-off. Use Value: 350 µA standby current extends battery life; TO263 thermal pad simplifies heatsinking on dense automotive PCBs. |
| Point-of-Load Converter for Embedded Systems | Field-Deployable Sensor Node Power |
|
Use Scenario: Local 5 V regulation for FPGA I/O banks or ARM-based SoM where upstream 12 V rail exhibits ripple/noise. IC Role / Device Role / Timing Role: Compact, self-contained buck stage placed adjacent to load to minimize IR drop and noise coupling. Use Value: Fixed 5 V output with ±4% tolerance meets digital IC VCC requirements; 50 kHz frequency avoids audible noise in fanless enclosures. |
Use Scenario: Remote environmental sensor node powered by solar-charged 24 V battery, requiring reliable 5 V for wireless MCU and analog front-end. IC Role / Device Role / Timing Role: Primary DC/DC regulator operating across -20°C to +85°C ambient with automatic thermal foldback. Use Value: Built-in current limit (2.5–5.5 A peak) prevents damage during inrush or short-circuit events in unattended deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596-5.0 | 3 A rated, 150 kHz switching, requires external compensation - higher efficiency but larger solution size. | Preferred for higher current (>2 A) or tighter regulation (<±2%) needs; less tolerant of high-temperature operation. | Select when board space allows larger inductor/capacitor and thermal management supports 150 kHz losses. |
| MP1584EN-LF-Z | 3 A rated, 1.5 MHz switching, adjustable output - enables smaller magnetics but demands careful EMI filtering. | Better suited for portable or noise-sensitive applications; lacks integrated thermal shutdown latch behavior. | Choose for compact designs needing >2 A or programmable output, provided layout controls high-frequency EMI. |
Compared with LM2596-5.0 and MP1584EN-LF-Z, AP1512-50K5L-U offers lower EMI, simpler layout, and stronger thermal fault handling at the cost of fixed 5 V output and lower switching frequency - ideal for ruggedized industrial and automotive point-of-load use.
Availability
AP1512-50K5L-U is available at Aetrix Electronics and suitable for industrial PLC power supplies, automotive body control modules, and embedded point-of-load converters requiring stable component supply, long lifecycle support, and RoHS-compliant packaging.
Supply support for AP1512-50K5L-U 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 product line delivers cost-optimized, thermally robust buck regulators targeting space-constrained 2 A applications where simplicity, ruggedness, and wide input range outweigh the need for adjustable output or ultra-high efficiency.
FAQ
What is the maximum input voltage rating for AP1512-50K5L-U?
The absolute maximum input voltage is +63 V, with recommended operating range from +4.5 V to +60 V. Operation above 60 V is not guaranteed and may trigger internal overvoltage protection or degrade reliability. The 60 V upper limit ensures safe operation during automotive load-dump transients and industrial 48 V bus surges.
Can AP1512-50K5L-U be used in adjustable-output configurations?
No - AP1512-50K5L-U is factory-configured for fixed 5.0 V output. Only part numbers ending in "ADJ" (e.g., AP1512-ADJK5L-U) support adjustable output via external resistor divider on the FB pin. This variant uses internal feedback resistors to set 5.0 V and cannot be reconfigured.
How does the thermal shutdown function behave under sustained overload?
When junction temperature exceeds ~150°C, thermal shutdown activates and holds the internal switch OFF until die temperature falls below ~135°C hysteresis threshold. During shutdown, quiescent current remains at ~350 µA, and the device does not auto-restart - VIN or SD must be cycled to resume regulation.
What is the minimum recommended PCB copper area for the TO263-5L thermal pad?
Diodes specifies a minimum of 0.4 in² (≈2.6 cm²) copper area under the exposed tab, with 3 in² strongly recommended for full 2 A operation at 85°C ambient. Use 2 oz copper thickness and multiple thermal vias to inner ground planes to achieve θJA ≈ 23°C/W as characterized in the datasheet.
AP1512-50K5L-U Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tube
- 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):
- 5V
- 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
AP1512-50K5L-U FAQ
1.How can I place an order for AP1512-50K5L-U through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1512-50K5L-U 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 AP1512-50K5L-U reliable?
The price and inventory of AP1512-50K5L-U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1512-50K5L-U is usually 5 days.
3.What payment methods are accepted for AP1512-50K5L-U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1512-50K5L-U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1512-50K5L-U?
AP1512-50K5L-U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1512-50K5L-U 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 AP1512-50K5L-U?
For technical support, including AP1512-50K5L-U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1512-50K5L-U requirements.
6.How does Aetrix verify that AP1512-50K5L-U is sourced from the original manufacturer or authorized distributors?
All AP1512-50K5L-U 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 AP1512-50K5L-U meets industry standards.
7.What is the process for return or replacement of AP1512-50K5L-U?
All AP1512-50K5L-U units undergo pre-shipment inspection (PSI). If there is an issue with AP1512-50K5L-U, 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 AP1512-50K5L-U part is unused and in its original packaging.
Return procedure for AP1512-50K5L-U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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