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Diodes Incorporated AP1501-T5G-U
- Part No.:
- AP1501-T5G-U
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-220-5
- Datasheet:
-
AP1501-T5G-U.pdf
- Description:
- IC REG BUCK ADJ 3A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,480
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Product details
Overview
AP1501-T5G-U from Diodes Incorporated is a non-synchronous PWM buck DC/DC converter with integrated 3A power switch, 150kHz fixed switching frequency, ±4% output voltage tolerance (5V version), and ON/OFF shutdown control. It operates from 7V to 40V input and delivers regulated 5V at up to 3A in TO220-5 package - used in industrial power supplies and embedded system point-of-load regulation.
For engineers reviewing the AP1501-T5G-U datasheet, AP1501-T5G-U pinout, AP1501-T5G-U application, or AP1501-T5G-U equivalent, key selection criteria include thermal resistance (θJA = 31°C/W), internal current limit (4.0A typ), feedback reference voltage (1.23V), and compatibility with standard external catch diodes like B340A.
Technical Context
The AP1501-T5G-U implements voltage-mode PWM control with an internal 1.23V reference and oscillator, eliminating need for external compensation. Its non-synchronous architecture requires an external Schottky catch diode and inductor, with duty cycle determined by VOUT/VIN ratio and limited to 100% max.
Thermal shutdown activates at +150°C junction temperature; overcurrent protection triggers at 4.0A typical peak switch current. Shutdown logic accepts 0.6V (ON) / 2.0V (OFF) thresholds on SD pin, enabling low-quiescent standby mode (250µA max at VIN=40V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% under 0.2–3A load and 7–40V input - ensures stable rail for microcontrollers and logic. |
| Switching Frequency | 150kHz ±15% - enables use of low-cost, low-ESR 33–47µH inductors and reduces EMI filtering complexity. |
| Max Output Current | 3A continuous - supports high-current digital loads without external driver stages. |
| Input Voltage Range | 7V to 40V - accommodates 12V/24V industrial bus inputs with margin for transients. |
| Feedback Reference | 1.23V ±2% - sets output via resistor divider in adjustable versions; fixed 5V variant bypasses FB pin. |
| Thermal Resistance | θJA = 31°C/W (TO220-5) - requires heatsink for >1.5A at ambient >50°C with 24V input. |
| Shutdown Quiescent Current | 250µA max at VIN=40V - enables ultra-low-power system sleep states. |
Pinout & Package
AP1501-T5G-U uses the TO220-5L package with exposed metal tab connected to GND for thermal conduction. Pin 1 (VIN) accepts 7–40V input; Pin 2 (Output) drives external inductor; Pin 3 (GND) is power ground; Pin 4 (FB) is unconnected in fixed 5V version; Pin 5 (SD) controls ON/OFF state with logic-level signal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 – VIN | Power Input Supply | Accepts 7–40V DC; requires local 100µF+ low-ESR capacitor to suppress switching transients. |
| 2 – Output | Internal Power Switch Drain | Drives external inductor; voltage swings between ~0.5V (saturation) and VIN–VSAT during operation. |
| 3 – GND | Power Ground Reference | Common return for VIN, SD, and thermal tab; must connect directly to large copper pour for heat dissipation. |
| 4 – FB | Output Voltage Feedback | Left open or tied to GND in fixed 5V version; unused - no external resistor divider required. |
| 5 – SD | Shutdown Control Input | Pull ≤0.6V to enable regulator; pull ≥2.0V to enter 250µA standby mode; 10kΩ pull-down recommended if unused. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3A Power Switch | Eliminates need for external MOSFET driver and gate drive circuitry - reduces BOM count and layout area. |
| Fixed 5V Output Version | Removes FB pin dependency and external resistor network - simplifies design and improves production yield. |
| Thermal Shutdown + Current Limit | Protects against sustained overload or poor heatsinking - prevents latch-up or permanent damage during fault conditions. |
| 150kHz Switching Frequency | Enables use of cost-effective, shielded drum-core inductors (e.g., 47µH/3A) and ceramic input capacitors. |
| TO220-5L Package | Industry-standard through-hole footprint with GND-tab thermal path - compatible with legacy assembly and manual repair. |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
|
Use Scenario: Regulating 12V vehicle battery to clean 5V for microcontroller and CAN transceiver power rails. IC Role / Device Role / Timing Role: Primary non-isolated buck converter supplying core logic voltage with thermal robustness for under-hood environments. Use Value: Withstands 40V load dump transients and maintains regulation across -40°C to +105°C ambient when mounted on 2oz copper with heatsink. |
Use Scenario: Generating 5V from 24V factory automation bus for programmable logic controllers and sensor interfaces. IC Role / Device Role / Timing Role: High-current step-down regulator delivering stable 3A output with minimal external components. Use Value: Reduces bill-of-materials by integrating power switch and control logic - eliminates discrete MOSFET + controller pairing. |
| Point-of-Load Power for FPGA Boards | Legacy Equipment Retrofit Power Supplies |
|
Use Scenario: Providing 5V/3A to FPGA configuration circuitry and I/O banks on compact carrier boards. IC Role / Device Role / Timing Role: Compact, thermally efficient buck stage replacing aging linear regulators or multi-chip DC/DC modules. Use Value: Achieves 80% efficiency at full load (VIN=12V), reducing board temperature rise vs. linear alternatives. |
Use Scenario: Replacing obsolete 7805-based supplies in aging test equipment requiring higher current capability. IC Role / Device Role / Timing Role: Drop-in upgrade path using same TO220 footprint but delivering 3× the current of legacy linear regulators. Use Value: Maintains mechanical compatibility while enabling higher-performance digital subsystems without board redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2576-5.0 | 5.0V fixed, 3A, 52kHz switching - larger inductor required; no integrated thermal shutdown. | Limited to lower-frequency designs where EMI constraints allow larger magnetics. | Choose if legacy LM2576 footprint compatibility is mandatory and thermal monitoring is handled externally. |
| MP1584EN-LF-Z | 5.0V fixed, 3A, 1.5MHz switching - smaller passive components but higher EMI; requires external compensation. | Suitable for space-constrained PCBs where 47µH inductor size is prohibitive. | Prefer for new designs needing miniaturization, provided layout includes tight EMI mitigation and feedback stability tuning. |
Compared with LM2576-5.0 and MP1584EN-LF-Z, AP1501-T5G-U offers superior thermal protection integration and simpler layout due to internal compensation, making it optimal for industrial applications prioritizing reliability over ultra-compact size.
Availability
AP1501-T5G-U is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control units, FPGA power delivery, and legacy equipment retrofit requiring stable component supply and long-term manufacturability.
Supply support for AP1501-T5G-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 ICs, specializing in power management, signal integrity, and protection solutions for industrial, computing, and automotive markets.
The AP1501 belongs to Diodes' monolithic buck converter product line, designed specifically for cost-sensitive, high-reliability DC/DC conversion in non-isolated point-of-load applications with wide input voltage range.
FAQ
Is AP1501-T5G-U pin-compatible with other AP1501 variants?
No - AP1501-T5G-U is the fixed 5V version in TO220-5L package. It differs from adjustable (AP1501-K5G-U) and TO263-5 variants in pin function (FB unused), thermal pad layout, and mounting method. Direct substitution requires PCB footprint and schematic review.
What external components are mandatory for AP1501-T5G-U operation?
Mandatory components are: input capacitor (≥100µF, low-ESR), output capacitor (≥220µF, low-ESR), power inductor (47µH/3A), and Schottky catch diode (e.g., B340A). No feedback resistors are needed for fixed 5V operation, and the FB pin remains unconnected.
Does AP1501-T5G-U require heatsinking at 3A output?
Yes - with θJA = 31°C/W, junction temperature rise exceeds safe limits above ~1.5A at 25°C ambient without heatsinking. For 3A continuous operation at 24V input, a 10°C/W heatsink or ≥4 in² 2oz copper pour is recommended per Diodes' thermal guidelines.
Can AP1501-T5G-U be used in automotive applications?
AP1501-T5G-U meets AEC-Q100 stress testing requirements only when qualified under specific change control - standard parts are not automotive-grade. For automotive use, contact Diodes for PPAP-capable AEC-Q100 qualified versions with IATF 16949 manufacturing certification.
AP1501-T5G-U Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-220-5
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 1.23V
- Voltage - Output (Max):
- 37V
- Current - Output:
- 3A
- Frequency - Switching:
- 150kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-5
AP1501-T5G-U FAQ
1.How can I place an order for AP1501-T5G-U through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1501-T5G-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 AP1501-T5G-U reliable?
The price and inventory of AP1501-T5G-U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1501-T5G-U is usually 5 days.
3.What payment methods are accepted for AP1501-T5G-U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1501-T5G-U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1501-T5G-U?
AP1501-T5G-U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1501-T5G-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 AP1501-T5G-U?
For technical support, including AP1501-T5G-U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1501-T5G-U requirements.
6.How does Aetrix verify that AP1501-T5G-U is sourced from the original manufacturer or authorized distributors?
All AP1501-T5G-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 AP1501-T5G-U meets industry standards.
7.What is the process for return or replacement of AP1501-T5G-U?
All AP1501-T5G-U units undergo pre-shipment inspection (PSI). If there is an issue with AP1501-T5G-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 AP1501-T5G-U part is unused and in its original packaging.
Return procedure for AP1501-T5G-U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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