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Diodes Incorporated AP1512A-12K5G-13
- Part No.:
- AP1512A-12K5G-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
AP1512A-12K5G-13.pdf
- Description:
- IC REG BUCK 2A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,074
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Product details
Overview
AP1512A-12K5G-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 thermal/current protection. It operates from 4.5 V to 60 V input, delivers up to 3 A load current, and targets industrial power rails requiring compact, self-contained step-down regulation.
For engineers reviewing the AP1512A-12K5G-13 datasheet, AP1512A-12K5G-13 pinout, AP1512A-12K5G-13 application, or AP1512A-12K5G-13 equivalent, this part serves as a fixed-output, high-input-voltage buck regulator with logic-controlled shutdown, internal compensation, and robust thermal management for embedded power supplies.
Technical Context
The AP1512A-12K5G-13 implements voltage-mode PWM control with a fixed 50 kHz ±15% oscillator, enabling predictable filter design using standard inductors and capacitors. Its internal 3 A N-channel MOSFET switch and 1.235 V reference enable stable regulation without external pass transistors.
Feedback is implemented via resistive divider monitoring at the FB pin, with built-in 220 mV current-sense threshold for overcurrent protection and thermal shutdown triggered above 125 °C junction temperature. The SD pin accepts logic-level ON/OFF control (VIL ≤ 0.6 V, VIH ≥ 2.0 V) to reduce quiescent current to 350 µA in standby.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12 V ±4% across 15–60 V input and 0.2–3 A load ensures stable rail for microcontrollers and analog circuitry. |
| Switching Frequency | 50 kHz ±15% enables use of low-cost, high-inductance chokes (e.g., 33–47 µH) while minimizing EMI concerns. |
| Max Output Current | 3 A continuous output supports higher-power loads than 2 A variants, reducing need for parallel regulators. |
| Input Voltage Range | 4.5 V to 60 V operation accommodates wide-input industrial, automotive, and telecom power buses. |
| Efficiency | 80% at VIN = 30 V, VOUT = 12 V, IOUT = 3 A defines real-world power loss budget for thermal layout planning. |
| Thermal Resistance | θJA = 23 °C/W (with 3 in² copper) quantifies required PCB copper area for safe operation at full load. |
| Shutdown Quiescent Current | 350 µA at VIN = 60 V enables low-power system sleep modes without auxiliary LDOs. |
Pinout & Package
AP1512A-12K5G-13 is housed in a surface-mount TO263-5L package with exposed metal tab for thermal conduction to PCB copper. Pin 1 (VIN) accepts 4.5–60 V input; Pin 2 (OUTPUT) drives the external inductor; Pin 3 (GND) is power ground; Pin 4 (FB) connects to resistor divider for feedback (not used in fixed 12 V version); Pin 5 (SD) controls ON/OFF state via logic-level signal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power input supply | Accepts 4.5–60 V; requires local 100 µF/100 V bypass capacitor to handle switching transients. |
| OUTPUT (Pin 2) | Internal switch drain node | Drives external inductor; must minimize copper area to reduce EMI coupling to sensitive circuits. |
| GND (Pin 3) | Power and signal reference | Common return path for input capacitor, output capacitor, and feedback network; ties to thermal tab. |
| FB (Pin 4) | Feedback input (NC for fixed 12 V) | No connection required - internally tied to 12 V reference; unused in AP1512A-12K5G-13 variant. |
| SD (Pin 5) | Shutdown control input | Logic-low (≤0.6 V) enables regulation; logic-high (≥2.0 V) disables switch and reduces IQ to 350 µA. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3 A power switch | Eliminates external MOSFET and gate driver, reducing BOM count and board space in 12 V buck designs. |
| Fixed 12 V ±4% output | Guaranteed accuracy over full temperature and load range removes need for post-regulation trimming. |
| Internal compensation network | Enables stable loop response with no external compensation components-reduces design iteration time. |
| Thermal shutdown + current limit | Protects against sustained overload or poor heatsinking without external sensing circuitry. |
| Logic-compatible shutdown (SD) | Supports microcontroller-driven power sequencing and low-power sleep states without level-shifting. |
Applications
| Industrial PLC Power Rail | Automotive Body Control Module |
|---|---|
|
Use Scenario: Providing regulated 12 V supply to microcontrollers, CAN transceivers, and sensor interfaces in programmable logic controllers. IC Role / Device Role / Timing Role: Primary buck regulator converting unregulated 24 V bus to clean 12 V rail with thermal fault protection. Use Value: 3 A capability supports multiple downstream ICs; 60 V max input handles load-dump transients up to ISO 7637-2 Pulse 5a. |
Use Scenario: Generating 12 V for body electronics including door modules, lighting drivers, and LIN transceivers. IC Role / Device Role / Timing Role: Fixed-output DC/DC converter replacing linear regulators to improve efficiency and reduce heat in confined enclosures. Use Value: 80% efficiency at 3 A minimizes thermal stress; shutdown pin enables vehicle-off current draw < 1 mA. |
| Telecom Remote Radio Unit | Factory Automation I/O Module |
|
Use Scenario: Converting 48 V backplane voltage to 12 V for RF front-end biasing and control logic in remote radio heads. IC Role / Device Role / Timing Role: High-input-voltage buck stage delivering stable 12 V under variable load and ambient conditions. Use Value: 50 kHz switching allows use of shielded drum-core inductors; TO263 thermal pad enables direct mounting to metal chassis. |
Use Scenario: Powering digital isolators, ADCs, and relay drivers in modular I/O systems operating from 24 V industrial bus. IC Role / Device Role / Timing Role: Compact, self-contained 12 V regulator supporting hot-swap and brownout recovery via SD pin control. Use Value: Internal current limit prevents latch-up during short-circuit events on field wiring; RoHS-compliant lead-free finish meets industrial compliance requirements. |
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 fixed-frequency, adjustable feedback but requires external compensation. | Higher switching frequency enables smaller magnetics but increases EMI filtering complexity. | Prefer when faster transient response or smaller inductors are needed; verify thermal performance at 60 V input. |
| MP1584EN-LF-Z | 3 A, 1.5 MHz synchronous buck, adjustable output only, requires external FETs for fixed 12 V. | Synchronous rectification improves light-load efficiency but adds component count and layout sensitivity. | Choose for >85% efficiency at low loads or where PCB space permits additional feedback resistors and sync FETs. |
Compared with LM2596S-12/NOPB and MP1584EN-LF-Z, the AP1512A-12K5G-13 offers simpler implementation with fixed 12 V output, integrated thermal/current protection, and proven robustness at high input voltages-ideal for cost-sensitive, thermally constrained industrial applications.
Availability
AP1512A-12K5G-13 is available at Aetrix Electronics and suitable for industrial PLC power rails, automotive body control modules, and telecom remote radio units requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP1512A-12K5G-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 power management, signal integrity, and protection solutions for industrial, automotive, and consumer markets.
The AP1512/A series was designed as a family of monolithic buck converters targeting cost-effective, high-reliability DC/DC conversion in space-constrained applications with wide input voltage ranges.
FAQ
Is AP1512A-12K5G-13 pin-compatible with AP1512-12K5G-13?
Yes - both share identical TO263-5L pinout and fixed 12 V output, but AP1512A-12K5G-13 supports 3 A continuous output versus 2 A for the AP1512 variant. The current limit threshold is higher (3.2–4 A vs. 2.5–3 A), and thermal shutdown behavior remains consistent across both versions.
Can AP1512A-12K5G-13 be used with input voltage below 4.5 V?
No - the absolute minimum operating input voltage is 4.5 V per the datasheet's Recommended Operating Conditions. Below this, the internal bias circuitry cannot sustain regulation, and startup may fail. For sub-4.5 V inputs, consider low-VIN buck regulators such as the TPS54302 or AP6320x series.
What is the role of the FB pin in AP1512A-12K5G-13?
The FB pin is internally connected to the 12 V reference and is not externally accessible in this fixed-output variant. It must remain unconnected - no external resistor divider or capacitor is required. Connecting it risks disrupting internal feedback and causing regulation failure.
How does thermal performance change with reduced PCB copper area?
With less than the recommended 3 in² of 2 oz copper, θJA rises significantly - e.g., dropping to 1 in² increases θJA to ~45 °C/W. At 3 A load and 60 V input, this can push junction temperature beyond 125 °C, triggering thermal shutdown. Always follow Diodes' AP02001 pad layout for reliable operation.
AP1512A-12K5G-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:
- -
- 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:
- Surface Mount
- Supplier Device Package:
- TO-263-5
AP1512A-12K5G-13 FAQ
1.How can I place an order for AP1512A-12K5G-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1512A-12K5G-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-12K5G-13 reliable?
The price and inventory of AP1512A-12K5G-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-12K5G-13 is usually 5 days.
3.What payment methods are accepted for AP1512A-12K5G-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1512A-12K5G-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1512A-12K5G-13?
AP1512A-12K5G-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1512A-12K5G-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-12K5G-13?
For technical support, including AP1512A-12K5G-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1512A-12K5G-13 requirements.
6.How does Aetrix verify that AP1512A-12K5G-13 is sourced from the original manufacturer or authorized distributors?
All AP1512A-12K5G-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-12K5G-13 meets industry standards.
7.What is the process for return or replacement of AP1512A-12K5G-13?
All AP1512A-12K5G-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1512A-12K5G-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-12K5G-13 part is unused and in its original packaging.
Return procedure for AP1512A-12K5G-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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