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Diodes Incorporated AP1512A-K5L-13
- Part No.:
- AP1512A-K5L-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
AP1512A-K5L-13.pdf
- Description:
- IC REG BUCK ADJ 3A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,503
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Product details
Overview
AP1512A-K5L-13 from Diodes Incorporated is a monolithic 50 kHz non-synchronous PWM buck DC/DC converter with integrated 3 A switch, fixed 5 V output, TO263-5L package, and logic-level ON/OFF shutdown control-designed for high-efficiency step-down regulation in industrial power supplies and embedded systems.
For engineers reviewing the AP1512A-K5L-13 datasheet, AP1512A-K5L-13 pinout, AP1512A-K5L-13 application, or AP1512A-K5L-13 equivalent, key selection criteria include its 3 A output capability, ±4% output voltage tolerance at 5 V, thermal shutdown protection, 4.5–60 V input range, and compatibility with standard external components (inductor, diode, capacitors) in compact board layouts.
Technical Context
The AP1512A operates in voltage-mode PWM control with internal compensation, eliminating need for external loop components. Its 50 kHz ±15% oscillator sets switching frequency, enabling use of low-cost, high-inductance filter chokes while maintaining stable regulation across line (4.5–60 V) and load (0–3 A) variations.
Feedback is sensed via the FB pin referencing an internal 1.235 V bandgap, supporting both fixed-output (5 V) and adjustable versions. The SD pin accepts logic-level signals (VIL ≤ 0.6 V ON, VIH ≥ 2.0 V OFF), enabling system-level power sequencing and standby current reduction to 350 µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% under 0.2–3 A load and 10–60 V input-ensures stable rail for microcontrollers and analog circuitry without external resistor divider. |
| Switch Current Rating | 3 A peak internal MOSFET-supports full 3 A continuous output without external transistor, reducing BOM count and layout complexity. |
| Input Voltage Range | 4.5 V to 60 V-enables direct operation from 12 V, 24 V, and 48 V industrial buses, including automotive battery-supplied systems with transient tolerance. |
| Switching Frequency | 50 kHz ±15%-permits use of low-cost, high-inductance (e.g., 47 µH) chokes and reduces EMI compared to higher-frequency alternatives. |
| Thermal Protection | Integrated thermal shutdown with automatic recovery-prevents permanent damage during overload or poor heatsinking; junction-to-case θJC = 3.5 °C/W. |
| Shutdown Quiescent Current | 350 µA at VIN = 60 V-enables ultra-low-power standby mode for battery-backed or energy-sensitive applications. |
| Efficiency | 80% at VIN = 30 V, VOUT = 5 V, IOUT = 3 A-delivers high conversion efficiency with minimal heat generation in thermally constrained enclosures. |
Pinout & Package
AP1512A-K5L-13 is housed in a surface-mount TO263-5L (D²PAK) package with exposed metal tab soldered to PCB ground plane for thermal conduction. The tab is electrically connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply connection | Accepts 4.5–60 V DC; requires local 1 µF ceramic bypass capacitor to suppress switching transients and supply peak currents. |
| OUTPUT (Pin 2) | Internal power switch drain | Swings between VIN – 1.5 V (saturation) and ~–0.5 V; connects directly to inductor; trace must minimize parasitic inductance and avoid large copper pour. |
| GND (Pin 3) | Power and signal reference | Common return for internal regulator, feedback amplifier, and thermal sensor; tied to exposed metal tab for thermal path. |
| FB (Pin 4) | Feedback input | Senses output voltage via resistive divider (not required for fixed 5 V version); referenced to internal 1.235 V bandgap for regulation accuracy. |
| SD (Pin 5) | Shutdown control input | Logic-compatible enable: <0.6 V = ON, >2.0 V = OFF; pulls regulator into 350 µA standby state; can be left open or grounded for always-on operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3 A power switch | Eliminates need for external MOSFET and gate driver-reduces component count, footprint, and layout sensitivity in buck converters. |
| Internal compensation network | Enables stable regulation with no external compensation components-simplifies design validation and improves production yield. |
| Thermal shutdown + current limit | Protects against sustained overloads and ambient temperature excursions up to +125 °C junction-avoids catastrophic failure without external sensing circuitry. |
| Logic-level ON/OFF control | Supports direct interface with MCU GPIO or system supervisor ICs-enables precise power sequencing and low-power sleep states. |
| Lead-free, RoHS-compliant packaging | TO263-5L with matte tin finish-meets EU Directive 2002/95/EC requirements and supports standard Pb-free reflow profiles. |
Applications
| Industrial Power Supply | Embedded System Rail Generation |
|---|---|
|
Use Scenario: 24 V bus-powered PLC I/O module requiring clean, regulated 5 V for digital logic and ADC reference. IC Role / Device Role / Timing Role: Primary buck regulator delivering 3 A continuous 5 V output with line/load regulation <±1% and ripple <50 mVpp. Use Value: Integrated switch and thermal protection eliminate discrete FET and thermal monitoring, reducing bill-of-materials by 4 components and PCB area by 25%. |
Use Scenario: Field-deployable sensor node powered from 48 V PoE midspan with intermittent wake-up cycles. IC Role / Device Role / Timing Role: Efficient 5 V rail generator with 350 µA shutdown current and fast startup (<100 µs) for rapid sensor sampling bursts. Use Value: Low standby current extends battery backup runtime; 60 V max input accommodates PoE voltage transients without external clamping. |
| Automotive Body Control Module | Test Equipment Power Subsystem |
|
Use Scenario: 12 V battery-supplied BCM supplying 5 V to CAN transceivers and microcontroller peripherals. IC Role / Device Role / Timing Role: Input-transient-tolerant buck regulator with 4.5–60 V operation and built-in current limiting for load-dump survivability. Use Value: Withstands ISO 7637-2 pulse 5a (75 V/100 ms) when combined with TVS; eliminates need for external current-sense resistor and comparator. |
Use Scenario: Benchtop multimeter with dual-rail analog front-end requiring stable 5 V at up to 2.5 A during measurement acquisition. IC Role / Device Role / Timing Role: High-current, low-noise DC/DC stage preceding LDO post-regulation-optimized for low thermal resistance and minimal output impedance. Use Value: TO263-5L package with 3.5 °C/W θJC enables full 3 A output on 2 oz copper without forced airflow-reducing thermal derating concerns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596S-5.0/NOPB | 3 A rating, 150 kHz switching, external compensation, no integrated thermal shutdown-requires external thermal pad and current-sense resistor for overload protection. | Higher switching frequency allows smaller inductors but increases EMI filtering burden; lacks logic-level shutdown-needs external transistor for enable control. | Select when higher frequency and adjustable output are needed; avoid if board space is limited and thermal management is challenging. |
| MP1584EN-LF-Z | 3 A rating, 1.5 MHz switching, internal compensation, 4.5–28 V input-lacks 60 V input capability and has lower max input voltage than AP1512A. | Optimized for consumer-grade 12–24 V systems; unsuitable for 48 V industrial or automotive applications due to input voltage ceiling. | Prefer for cost-sensitive, space-constrained designs with ≤28 V input; reject for 48 V+ or harsh-environment deployments. |
Compared with LM2596S-5.0/NOPB and MP1584EN-LF-Z, AP1512A-K5L-13 uniquely combines 60 V input tolerance, integrated thermal/current protection, logic-level shutdown, and TO263 thermal performance-making it optimal for ruggedized industrial and automotive power rails where reliability and simplified layout are critical.
Availability
AP1512A-K5L-13 is available at Aetrix Electronics and suitable for industrial power supplies, embedded system rail generation, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AP1512A-K5L-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.
The AP1512/A series belongs to Diodes' monolithic DC/DC converter product line, engineered for cost-effective, thermally robust step-down regulation in space-constrained and high-input-voltage applications-prioritizing integration, protection, and ease of implementation.
FAQ
What is the maximum input voltage for AP1512A-K5L-13, and does it support automotive load dump?
The AP1512A-K5L-13 supports up to +60 V DC input, with absolute maximum rating of +63 V. While not rated for ISO 7637-2 load dump pulses alone, it withstands 75 V transients for short durations when paired with a properly sized TVS diode-making it suitable for 12 V and 24 V automotive systems with appropriate front-end protection.
Can AP1512A-K5L-13 be used in adjustable-output configurations?
No-AP1512A-K5L-13 is the fixed 5 V output variant (suffix "50" per ordering guide). Adjustable versions use suffix "ADJ" (e.g., AP1512A-ADJK5L-13) and require external resistor divider on the FB pin to set output voltage from 1.23 V to 37 V. The -K5L-13 suffix confirms fixed 5 V configuration.
What thermal design guidance applies to the TO263-5L package?
For reliable 3 A operation, the TO263-5L metal tab must be soldered to ≥2 in² of 2 oz copper on the PCB. Thermal resistance drops from 23 °C/W (junction-to-ambient) to ~3.5 °C/W (junction-to-case) with proper copper area-critical for maintaining TJ < 125 °C at full load and 85 °C ambient.
Does AP1512A-K5L-13 require external compensation components?
No-the AP1512A integrates full voltage-mode PWM compensation, including error amplifier, oscillator, and current-sense comparator. No external capacitors or resistors are needed for loop stability, simplifying layout and eliminating tuning iterations during prototype validation.
AP1512A-K5L-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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1.23V
- Voltage - Output (Max):
- 37V
- Current - Output:
- 3A
- 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
AP1512A-K5L-13 FAQ
1.How can I place an order for AP1512A-K5L-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1512A-K5L-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-K5L-13 reliable?
The price and inventory of AP1512A-K5L-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-K5L-13 is usually 5 days.
3.What payment methods are accepted for AP1512A-K5L-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1512A-K5L-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1512A-K5L-13?
AP1512A-K5L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1512A-K5L-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-K5L-13?
For technical support, including AP1512A-K5L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1512A-K5L-13 requirements.
6.How does Aetrix verify that AP1512A-K5L-13 is sourced from the original manufacturer or authorized distributors?
All AP1512A-K5L-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-K5L-13 meets industry standards.
7.What is the process for return or replacement of AP1512A-K5L-13?
All AP1512A-K5L-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1512A-K5L-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-K5L-13 part is unused and in its original packaging.
Return procedure for AP1512A-K5L-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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