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Diodes Incorporated AP1512-33K5L-13
- Part No.:
- AP1512-33K5L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
AP1512-33K5L-13.pdf
- Description:
- IC REG BUCK 3.3V 2A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,730
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Product details
Overview
AP1512-33K5L-13 from Diodes Incorporated is a fixed-output 3.3V, 2A non-synchronous PWM buck DC/DC converter in TO263-5L package, operating at 50kHz ±15%, with integrated power switch, thermal shutdown, and current-limit protection. It delivers stable regulation across 4.5–60V input range for industrial power rails and embedded system point-of-load conversion.
For engineers reviewing the AP1512-33K5L-13 datasheet, AP1512-33K5L-13 pinout, AP1512-33K5L-13 application, or AP1512-33K5L-13 equivalent, key selection criteria include its 3.3V ±4% output tolerance, 2A continuous load capability, 50kHz switching frequency enabling compact magnetics, ON/OFF logic-controlled shutdown, and TO263 thermal performance with θJC = 3.5°C/W.
Technical Context
The AP1512-33K5L-13 implements voltage-mode PWM control with internal 1.235V reference and error amplifier, enabling stable feedback without external compensation components. Its fixed 3.3V output is internally trimmed, eliminating external resistor dividers required in adjustable versions.
It integrates a 2A N-channel MOSFET switch with 1.5V typical saturation voltage (VSAT), operates up to 60V input, and features dedicated SD pin for logic-level shutdown (VIL ≤ 0.6V, VIH ≥ 2.0V) that reduces quiescent current to 350μA in standby mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±4% (3.168–3.465V) under 0.2–2A load and 10–60V input - ensures compatibility with 3.3V logic and microcontroller I/O rails. |
| Switching Frequency | 50kHz ±15% - enables use of low-cost, high-inductance chokes (e.g., 47μH) and reduces EMI compared to higher-frequency alternatives. |
| Max Output Current | 2A continuous - supports mid-power applications like FPGA core supplies or industrial sensor modules without external boost stages. |
| Input Voltage Range | 4.5V to 60V - accommodates wide-input systems including 12V/24V/48V industrial buses and automotive battery variations. |
| Thermal Protection | Integrated thermal shutdown with automatic recovery - prevents latch-up during overload or poor heatsinking on PCB copper areas ≥0.4 in². |
| Shutdown Quiescent Current | 350μA at VIN = 60V - enables ultra-low-power sleep modes in battery-backed or energy-harvesting systems. |
| Efficiency | 83% at VIN = 30V, VOUT = 3.3V, IOUT = 2A - balances conduction loss and switching loss for optimal thermal footprint in TO263 package. |
Pinout & Package
AP1512-33K5L-13 uses the TO263-5L surface-mount package with exposed metal tab (GND-connected) for thermal dissipation. The 5-pin layout supports high-current routing and PCB copper heatsinking per Diodes Inc. AP02001 pad guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply rail | Accepts 4.5–60V; requires local 1μF ceramic bypass capacitor to suppress switching transients and supply peak gate drive current. |
| OUTPUT (Pin 2) | Internal power switch drain | Swings between ~VIN–1.5V and –0.5V; connects directly to inductor; minimal copper area recommended to reduce EMI coupling. |
| GND (Pin 3) | Power and signal ground | Common return for internal regulator, feedback amp, and thermal sensor; tied to exposed metal tab for thermal path to PCB copper. |
| FB (Pin 4) | Feedback input | Internally connected to 3.3V divider - not accessible; unused in fixed-output version but must remain unconnected or grounded per design. |
| SD (Pin 5) | Shutdown control | Logic-compatible input: <0.6V = ON, >2.0V = OFF; pulls to GND or floats for always-on operation; sinks <10μA in active state. |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic 2A buck converter | Integrates power switch, PWM controller, oscillator, and protection circuitry - eliminates external transistor and reduces BOM count by ≥4 components. |
| Fixed 3.3V output | Factory-trimmed output eliminates external resistor network and associated drift/tolerance errors - improves long-term stability over temperature. |
| 50kHz switching frequency | Enables use of low-cost, high-inductance, low-DCR chokes (e.g., 47μH) - reduces core loss and audible noise while simplifying EMI filter design. |
| Thermal + current limiting | Dual protection prevents damage during short-circuit, overload, or inadequate heatsinking - allows safe operation up to 125°C junction temperature. |
| Lead-free & RoHS-compliant | Meets EU Directive 2002/95/EC with exempted lead content - suitable for industrial and commercial applications requiring environmental compliance. |
Applications
| Industrial PLC Power Supply | Embedded Microcontroller Core Rail |
|---|---|
|
Use Scenario: Providing clean 3.3V power to ARM Cortex-M4-based controllers in programmable logic controllers with 24V DC field bus input. IC Role / Device Role / Timing Role: Primary step-down regulator converting 24V bus to 3.3V core voltage; handles transient loads up to 2A during real-time I/O bursts. Use Value: Internal compensation and 83% efficiency minimize thermal rise on dense PCBs; 50kHz frequency avoids interference with 4–20mA analog signal bands. |
Use Scenario: Powering FPGA configuration memory and I/O banks in edge AI inference modules operating from 48V telecom rectifier outputs. IC Role / Device Role / Timing Role: Point-of-load (POL) DC/DC converter delivering regulated 3.3V at up to 2A with fast line/load transient response. Use Value: Fixed 3.3V output eliminates calibration overhead; TO263 thermal performance supports operation at 85°C ambient without forced air. |
| Automotive Body Control Module | IoT Sensor Hub Power |
|
Use Scenario: Generating 3.3V supply for CAN transceivers and microcontrollers in 12V vehicle body electronics with cold-crank tolerance down to 4.5V. IC Role / Device Role / Timing Role: Input-stage buck regulator handling wide VIN range (4.5–60V) and reverse-polarity protected inputs via external diode. Use Value: 60V absolute max rating withstands load-dump transients; shutdown pin enables deep-sleep mode during vehicle ignition-off periods. |
Use Scenario: Powering multi-sensor nodes (temperature, humidity, motion) in battery-operated smart building systems with 12V backup supply. IC Role / Device Role / Timing Role: High-efficiency primary regulator enabling >1-year battery life; standby current <350μA extends shelf life during storage. Use Value: Low quiescent current in shutdown mode preserves battery charge; fixed 3.3V output ensures consistent ADC reference and sensor interface timing. |
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 |
|---|---|---|---|
| MP1584EN-LF-Z | 40V max input, 3A output, 1.5MHz switching, adjustable only - requires external resistors for 3.3V setting. | Higher frequency enables smaller inductors but increases EMI filtering complexity and reduces efficiency at light loads. | Select when board space is constrained and 1.5MHz operation aligns with system EMI profile; verify 3.3V accuracy with resistor tolerance stack-up. |
| LM2596S-3.3 | 40V max input, 3A output, 150kHz switching, fixed 3.3V - no shutdown pin, higher dropout, larger thermal footprint. | Lacks logic-controlled shutdown and has lower efficiency (75–80%) at 2A, requiring larger heatsink area on PCB. | Select for cost-sensitive legacy designs where shutdown functionality is unnecessary and thermal margin exceeds 10°C. |
Compared with MP1584EN-LF-Z and LM2596S-3.3, AP1512-33K5L-13 offers unique integration of 60V input rating, 2A capability, fixed 3.3V accuracy, and logic shutdown in TO263 - making it optimal for industrial and automotive applications demanding robustness and simplified layout.
Availability
AP1512-33K5L-13 is available at Aetrix Electronics and suitable for industrial PLC power supplies, embedded microcontroller core rails, automotive body control modules, and IoT sensor hub power requiring stable component supply across extended temperature and voltage ranges.
Supply support for AP1512-33K5L-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 ICs, specializing in power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The AP1512 product line delivers monolithic buck regulators targeting cost-sensitive, high-reliability applications where integration, thermal robustness, and wide input range are critical - especially in harsh-environment power conversion.
FAQ
What is the maximum allowable input voltage for AP1512-33K5L-13?
The absolute maximum input voltage is +63V, but the recommended operating range is +4.5V to +60V. Operation above 60V risks exceeding internal device stress limits and may trigger thermal shutdown before reaching absolute ratings. For automotive load-dump scenarios, ensure external clamping diodes limit transient spikes to ≤60V.
Can AP1512-33K5L-13 be used in adjustable-output configurations?
No - AP1512-33K5L-13 is factory-trimmed for fixed 3.3V output; the FB pin is internally connected and not accessible for external resistor networks. To achieve adjustable output, select AP1512-ADJK5L-13 or AP1512A-ADJK5L-13, which expose the FB node and specify 1.23V reference voltage.
How does thermal performance depend on PCB layout?
Thermal resistance θJC is 3.5°C/W, but θJA drops from 23°C/W (standard) to <15°C/W with ≥2 in² of 2 oz copper connected to the exposed tab. Layout must avoid solder mask over the tab, use multiple thermal vias to inner ground planes, and isolate OUTPUT pin copper to prevent EMI coupling - per Diodes AP02001 guidelines.
Is AP1512-33K5L-13 compatible with lead-free reflow profiles?
Yes - the "L" suffix denotes lead-free finish compliant with JEDEC J-STD-020D. It supports standard Pb-free reflow profiles with peak temperature up to 260°C for 30 seconds. Ensure board design accounts for TO263's large thermal mass by extending soak time and verifying uniform heating across the tab area.
AP1512-33K5L-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):
- 3.3V
- 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
AP1512-33K5L-13 FAQ
1.How can I place an order for AP1512-33K5L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1512-33K5L-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 AP1512-33K5L-13 reliable?
The price and inventory of AP1512-33K5L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1512-33K5L-13 is usually 5 days.
3.What payment methods are accepted for AP1512-33K5L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1512-33K5L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1512-33K5L-13?
AP1512-33K5L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1512-33K5L-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 AP1512-33K5L-13?
For technical support, including AP1512-33K5L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1512-33K5L-13 requirements.
6.How does Aetrix verify that AP1512-33K5L-13 is sourced from the original manufacturer or authorized distributors?
All AP1512-33K5L-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 AP1512-33K5L-13 meets industry standards.
7.What is the process for return or replacement of AP1512-33K5L-13?
All AP1512-33K5L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1512-33K5L-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 AP1512-33K5L-13 part is unused and in its original packaging.
Return procedure for AP1512-33K5L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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