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Diodes Incorporated AP1512A-T5L-U
- Part No.:
- AP1512A-T5L-U
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-220-5
- Datasheet:
-
AP1512A-T5L-U.pdf
- Description:
- IC REG BUCK ADJ 3A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,878
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Product details
Overview
AP1512A-T5L-U 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 on-card converters.
For engineers reviewing the AP1512A-T5L-U datasheet, AP1512A-T5L-U pinout, AP1512A-T5L-U application, or AP1512A-T5L-U equivalent, key selection factors 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 TO263 PCB thermal layout practices.
Technical Context
The AP1512A-T5L-U implements voltage-mode PWM control with internal 1.235 V reference and frequency-compensated error amplifier, enabling stable regulation without external compensation components. Its 50 kHz ±15% oscillator sets switching period and directly determines filter inductor/capacitor sizing.
It integrates a 3 A N-channel MOSFET switch, thermal shutdown (trip at ~150 °C), cycle-by-cycle current limiting (typ. 4 A), and logic-compatible shutdown input (VIL ≤ 0.6 V, VIH ≥ 2.0 V) that reduces quiescent current to 350 µA in standby mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% across 0.2–3 A load and 10–60 V input-enables direct replacement of linear regulators without feedback resistor network. |
| Switching Frequency | 50 kHz ±15%-permits use of low-cost, high-inductance chokes (e.g., 47 µH) and reduces EMI compared to higher-frequency alternatives. |
| Max Output Current | 3 A continuous-supports higher-power loads than 2 A variants (e.g., AP1512) without external boost transistors. |
| Input Voltage Range | 4.5 V to 60 V-allows operation from 12 V, 24 V, and 48 V industrial rails, including automotive battery transient conditions. |
| Thermal Protection | Integrated junction thermal shutdown-prevents device damage during overload or poor heatsinking; auto-recovery on cooldown. |
| Shutdown Quiescent Current | 350 µA at VSD = 5 V and VIN = 60 V-enables low-power system sleep modes without auxiliary LDOs. |
| Efficiency | 80% at VIN = 30 V, VOUT = 5 V, IOUT = 3 A-reduces heat generation vs. linear solutions while maintaining compact footprint. |
Pinout & Package
AP1512A-T5L-U uses the TO263-5L surface-mount package with exposed metal tab (GND-connected) for thermal conduction to PCB copper. Recommended pad layout follows Diodes Inc. AP02001 guidelines; minimum 0.4 in² copper area required, 2+ in² preferred for full 3 A operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Positive input supply rail | Accepts 4.5–60 V; requires local 1 µF ceramic bypass capacitor to suppress switching transients and supply peak currents. |
| OUTPUT | Internal power switch drain | Drives external catch diode and inductor; trace must be short and wide to minimize ringing and EMI coupling. |
| GND | Power and signal ground reference | Common return for VIN, OUTPUT, FB, SD; connects to exposed tab-must be soldered to large PCB copper pour for thermal management. |
| FB | Feedback input for output voltage sensing | Not used in fixed 5 V version (internally tied to reference); left unconnected per datasheet for AP1512A-50. |
| SD | Logic-level shutdown control | Pull ≤0.6 V to enable regulator; pull ≥2.0 V to enter 350 µA standby-compatible with MCU GPIO without level shifting. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3 A power switch | Eliminates need for external MOSFET and gate driver-reduces BOM count, board space, and layout complexity in 5 V/3 A buck designs. |
| Internal frequency compensation | Enables stable loop response with only two external components (inductor + output capacitor)-no compensation network design required. |
| Thermal shutdown + current limit | Hardware-level protection against overtemperature (>150 °C) and overcurrent (>4 A peak)-prevents catastrophic failure under fault conditions. |
| Logic-compatible shutdown | Direct interface with 3.3 V or 5 V microcontrollers-no external pull-up or level-shifting needed for ON/OFF sequencing. |
| Lead-free / RoHS-compliant | Meets EU Directive 2002/95/EC with exempted lead in die attach; suitable for industrial and commercial applications requiring environmental compliance. |
Applications
| Industrial Power Supply | On-Board 5 V Rail Generation |
|---|---|
|
Use Scenario: Generating stable 5 V for PLC I/O modules powered from 24 V DC bus with ambient temperatures up to 70 °C. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 5 V/3 A with built-in thermal protection and wide-input tolerance. Use Value: Replaces discrete 2 A controllers + external FET, reducing component count by ≥4 and improving thermal margin via TO263 copper conduction. |
Use Scenario: Providing main 5 V supply to microcontroller, CAN transceiver, and sensor interface on a motor drive control board. IC Role / Device Role / Timing Role: Fixed-output DC/DC converter operating at 50 kHz to minimize conducted EMI near sensitive analog circuits. Use Value: Achieves 80% efficiency at full 3 A load, cutting heat rise vs. linear regulator and eliminating need for heatsink in confined enclosure. |
| Automotive Body Control Module | Legacy Equipment Retrofit |
|
Use Scenario: Powering infotainment peripherals from 12 V battery with cold-crank (4.5 V) and load-dump (60 V) resilience. IC Role / Device Role / Timing Role: Input-tolerant buck regulator with shutdown control synchronized to vehicle ignition state. Use Value: Maintains regulation across full automotive voltage range without external TVS or pre-regulator-reducing system cost and footprint. |
Use Scenario: Upgrading aging 7805-based power supplies in test equipment to improve efficiency and reliability. IC Role / Device Role / Timing Role: Drop-in compatible 5 V buck solution using existing TO263 footprint and minimal external parts. Use Value: Delivers 3× the current of legacy linear regulators while reducing board temperature rise by >30 °C at full load. |
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 |
|---|---|---|---|
| LM2596SX-5.0/NOPB | 3 A, 150 kHz, adjustable/fixed versions; requires external compensation; no integrated thermal shutdown. | Higher switching frequency enables smaller inductors but increases EMI filtering burden; lacks auto-recovery thermal protection. | Select when higher frequency and lower output ripple are prioritized over thermal robustness and layout simplicity. |
| MP1584EN-LF-Z | 3 A, 1.5 MHz, adjustable-only; requires external feedback resistors; includes soft-start and better light-load efficiency. | Not pin-compatible; needs redesign of feedback network and compensation; superior for battery-powered systems with variable load. | Select when 1.5 MHz operation and programmable output are required, accepting added design effort and BOM cost. |
Compared with LM2596SX-5.0/NOPB and MP1584EN-LF-Z, AP1512A-T5L-U offers simpler implementation (no compensation design), stronger thermal safety (auto-recovery shutdown), and proven 50 kHz noise profile-but trades off switching frequency flexibility and light-load optimization.
Availability
AP1512A-T5L-U is available at Aetrix Electronics and suitable for industrial power supplies, on-board 5 V rail generation, and automotive body control modules requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for AP1512A-T5L-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 power management, signal integrity, and protection devices for industrial, computing, and consumer markets.
The AP1512/A series belongs to Diodes' monolithic DC/DC converter product line, engineered for cost-sensitive, high-reliability buck regulation in space-constrained applications where integration, thermal robustness, and input voltage resilience are critical.
FAQ
Is AP1512A-T5L-U pin-compatible with AP1512-T5L-U?
Yes-both share identical TO263-5L pinout (VIN, OUTPUT, GND, FB, SD) and mechanical footprint. However, AP1512A delivers 3 A versus 2 A, with higher current limit (4 A typ.) and slightly lower efficiency at full load (80% vs. 83%). Thermal design must accommodate the increased power dissipation.
Can AP1512A-T5L-U be used in adjustable-output configurations?
No-AP1512A-T5L-U is factory-trimmed for fixed 5.0 V output. The "-50" suffix denotes internal feedback divider; FB pin is not functional and must remain unconnected. For adjustable versions, select AP1512A-ADJ (e.g., AP1512A-ADJ-T5L-U) with external resistor divider.
What is the recommended minimum PCB copper area for thermal performance?
Diodes specifies ≥0.4 in² (≈258 mm²) of 2 oz copper connected to the TO263 tab for basic operation. For continuous 3 A load at elevated ambient temperatures, ≥2 in² is strongly recommended to maintain junction temperature below 125 °C-verified via thermal simulation or IR measurement per AP02001 layout guidelines.
Does AP1512A-T5L-U require an external catch diode?
Yes-an external Schottky diode (e.g., B360B) is mandatory between OUTPUT and VOUT to provide freewheeling path during switch-off. The IC contains no synchronous rectifier; omitting the diode causes immediate failure due to inductive kickback and lack of current path.
AP1512A-T5L-U Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-220-5
- Packaging:
- Tube
- 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:
- Through Hole
- Supplier Device Package:
- TO-220-5
AP1512A-T5L-U FAQ
1.How can I place an order for AP1512A-T5L-U through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1512A-T5L-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 AP1512A-T5L-U reliable?
The price and inventory of AP1512A-T5L-U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1512A-T5L-U is usually 5 days.
3.What payment methods are accepted for AP1512A-T5L-U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1512A-T5L-U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1512A-T5L-U?
AP1512A-T5L-U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1512A-T5L-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 AP1512A-T5L-U?
For technical support, including AP1512A-T5L-U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1512A-T5L-U requirements.
6.How does Aetrix verify that AP1512A-T5L-U is sourced from the original manufacturer or authorized distributors?
All AP1512A-T5L-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 AP1512A-T5L-U meets industry standards.
7.What is the process for return or replacement of AP1512A-T5L-U?
All AP1512A-T5L-U units undergo pre-shipment inspection (PSI). If there is an issue with AP1512A-T5L-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 AP1512A-T5L-U part is unused and in its original packaging.
Return procedure for AP1512A-T5L-U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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