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Diodes Incorporated AP1512A-50K5G-13
- Part No.:
- AP1512A-50K5G-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
AP1512A-50K5G-13.pdf
- Description:
- IC REG BUCK 2A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,704
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Product details
Overview
AP1512A-50K5G-13 from Diodes Incorporated is a monolithic 50 kHz fixed-frequency PWM buck DC/DC converter with integrated 3 A switch, 4.5–60 V input range, and adjustable output (1.23–37 V). It operates in voltage-mode non-synchronous control, includes thermal shutdown and current limit protection, and is packaged in TO263-5L for high-power industrial step-down regulation.
For engineers reviewing the AP1512A-50K5G-13 datasheet, AP1512A-50K5G-13 pinout, AP1512A-50K5G-13 application, or AP1512A-50K5G-13 equivalent, key selection criteria include its 3 A continuous output capability, 50 kHz ±15% oscillator tolerance, internal compensation, ON/OFF logic-controlled shutdown, and TO263-5L thermal performance with θJA = 23 °C/W on 3 in² copper.
Technical Context
The AP1512A implements voltage-mode PWM control with an internal 1.235 V reference and error amplifier, enabling stable feedback regulation without external compensation components. Its 50 kHz fixed switching frequency reduces filter inductor and capacitor size versus lower-frequency regulators while maintaining EMI manageability in space-constrained designs.
Thermal shutdown activates at ~150 °C junction temperature, and cycle-by-cycle current limiting triggers at 3.2–6 A peak (typ. 4 A), protecting against overload and short-circuit conditions. The SD pin accepts 0–40 V logic-level signals, with <1.3 V enabling operation and >2.0 V forcing standby mode drawing only 350 µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3 A continuous - supports higher load demands than 2 A AP1512 variants without external MOSFETs. |
| Switching Frequency | 50 kHz ±15% - enables use of smaller passive filters while balancing efficiency and EMI. |
| Input Voltage Range | 4.5 V to 60 V - accommodates wide-input industrial, automotive, and telecom power rails. |
| Feedback Reference | 1.235 V ±2% - sets output via resistor divider; enables precise adjustable outputs from 1.23 V to 37 V. |
| Current Limit Threshold | 3.2–6 A peak - protects internal switch during overloads; typ. 4 A at 25 °C, derating above 50 °C. |
| Quiescent Current | 5–10 mA active / 350 µA standby - minimizes no-load power loss in battery-backed or always-on systems. |
| Thermal Resistance | θJA = 23 °C/W (3 in² copper) - requires ≥0.4 in² PCB copper area for safe 3 A operation at 85 °C ambient. |
Pinout & Package
AP1512A-50K5G-13 is housed in a surface-mount TO263-5L package with exposed metal tab electrically connected to GND for thermal conduction and mechanical stability. The tab must be soldered to ≥0.4 in² of 2 oz copper for reliable thermal performance at full 3 A load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply rail | Accepts 4.5–60 V; requires local 1 µF ceramic bypass to suppress switching transients. |
| OUTPUT (Pin 2) | Internal power switch drain | Swings between VIN–1.5 V (saturation) and –0.5 V; connects to inductor and catch diode anode. |
| GND (Pin 3) | Power and signal reference | Common return for internal circuitry, thermal tab, and external feedback network ground. |
| FB (Pin 4) | Feedback input | Senses output via resistor divider; regulates output by comparing to 1.235 V internal reference. |
| SD (Pin 5) | Shutdown control | Logic-level input: <1.3 V = ON, >2.0 V = OFF; draws <10 µA when active, 350 µA in standby. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3 A power switch | Eliminates need for external MOSFET and gate driver, reducing BOM count and board area. |
| Internal compensation network | Enables stable loop response across line/load/temperature without external RC components. |
| Thermal shutdown + current limit | Prevents permanent damage under sustained overload or poor heatsinking; auto-recovery on cooldown. |
| Logic-compatible ON/OFF control | Supports microcontroller GPIO direct drive; low standby current extends system battery life. |
| Wide 4.5–60 V input range | Operates directly from unregulated 12 V, 24 V, 48 V, or 60 V industrial bus rails without pre-regulation. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
|
Use Scenario: Step-down conversion from 24 V vehicle battery to 5 V for MCU and sensors in door modules. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 5 V at up to 3 A with transient immunity to load dump pulses. Use Value: Internal 3 A switch and 60 V max input withstand 24 V system surges; thermal shutdown prevents latch-up during hot-plug events. |
Use Scenario: On-board 12 V to 3.3 V conversion for infotainment head unit microprocessors. IC Role / Device Role / Timing Role: Fixed-output buck controller providing low-noise, tightly regulated 3.3 V supply with fast load-step response. Use Value: 1.235 V reference and internal compensation ensure ±4% output accuracy across -40 to +85 °C ambient. |
| Telecom Remote Radio Unit | Factory Automation I/O Module |
|
Use Scenario: Distributed 48 V backplane to 12 V conversion powering RF amplifiers and bias circuits. IC Role / Device Role / Timing Role: Adjustable-output buck regulator configured for 12 V @ 2.5 A with remote sense capability. Use Value: 50 kHz switching allows compact 47 µH inductors; TO263-5L package enables conduction cooling into chassis-mounted copper planes. |
Use Scenario: DIN-rail mounted PLC power module converting 24 V DC to isolated 5 V for digital I/O logic. IC Role / Device Role / Timing Role: High-reliability primary-side buck regulator operating continuously at 85 °C ambient with 3 A margin. Use Value: θJA = 23 °C/W on 3 in² copper ensures junction stays below 125 °C at full load, meeting industrial lifetime requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z | 2.2 MHz switching, 0.6 A output, 4.5–36 V input, smaller SOIC-8 package | Better suited for compact, low-current point-of-load; lacks 60 V rating and 3 A drive | Select when board space is critical and input voltage ≤36 V; not drop-in for 48 V telecom or 60 V industrial rails. |
| LM2596S-5.0/NOPB | 150 kHz, 3 A, fixed 5 V output, TO263-5 package, no adjustable version | Matches output current but offers only fixed 5 V; no FB pin for custom regulation | Choose only if fixed 5 V is sufficient and design does not require programmable output or thermal monitoring. |
Compared with MP2451DT-LF-Z and LM2596S-5.0/NOPB, AP1512A-50K5G-13 uniquely combines 60 V input tolerance, 3 A integrated switch, adjustable output, and 50 kHz operation-making it optimal for ruggedized industrial buck stages where reliability and flexibility outweigh high-frequency density needs.
Availability
AP1512A-50K5G-13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, telecom remote radio units, and factory automation I/O modules requiring stable component supply across extended temperature and voltage ranges.
Supply support for AP1512A-50K5G-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, designed specifically for cost-sensitive, thermally demanding industrial and transportation applications requiring robust 3 A integration without external FETs.
FAQ
What is the maximum recommended output current for AP1512A-50K5G-13 at 85°C ambient?
The AP1512A delivers 3 A continuous output at TA = 25 °C with adequate PCB copper. At 85 °C ambient, derating is required: with 3 in² of 2 oz copper, maximum sustainable output is ~2.2 A to maintain TJ ≤ 125 °C. Thermal performance depends heavily on layout-undersized copper or poor airflow reduces usable current significantly.
Can AP1512A-50K5G-13 be used in a negative-output (buck-boost) configuration?
No. AP1512A is a dedicated non-synchronous buck regulator with grounded internal switch source. Its topology cannot generate negative voltages. For positive-to-negative conversion, Diodes recommends using AP1512A in a standard buck stage followed by an isolated flyback or inverting charge-pump IC-not as a standalone inverter.
Does AP1512A-50K5G-13 require an external catch diode, and what type is recommended?
Yes. AP1512A requires an external Schottky diode (e.g., B360B) connected between OUTPUT and VOUT. The diode must handle ≥3 A average current, ≥60 V PIV, and exhibit low forward voltage (<0.5 V at 3 A) to minimize conduction loss and maintain efficiency above 80% at full load.
How does the FB pin function in adjustable-output configurations?
In adjustable mode, FB senses voltage from a resistor divider between VOUT and GND. The internal 1.235 V reference compares against this voltage; the error amplifier adjusts duty cycle until VFB = 1.235 V, yielding VOUT = 1.235 × (1 + R1/R2). Divider resistors must draw 5–10 µA to avoid bias current error-typically 10 kΩ–100 kΩ total.
AP1512A-50K5G-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-50K5G-13 FAQ
1.How can I place an order for AP1512A-50K5G-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1512A-50K5G-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-50K5G-13 reliable?
The price and inventory of AP1512A-50K5G-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-50K5G-13 is usually 5 days.
3.What payment methods are accepted for AP1512A-50K5G-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1512A-50K5G-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1512A-50K5G-13?
AP1512A-50K5G-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1512A-50K5G-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-50K5G-13?
For technical support, including AP1512A-50K5G-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1512A-50K5G-13 requirements.
6.How does Aetrix verify that AP1512A-50K5G-13 is sourced from the original manufacturer or authorized distributors?
All AP1512A-50K5G-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-50K5G-13 meets industry standards.
7.What is the process for return or replacement of AP1512A-50K5G-13?
All AP1512A-50K5G-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1512A-50K5G-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-50K5G-13 part is unused and in its original packaging.
Return procedure for AP1512A-50K5G-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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