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Diodes Incorporated AP1501A-50T5G-U
- Part No.:
- AP1501A-50T5G-U
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
AP1501A-50T5G-U.pdf
- Description:
- IC REG BUCK 3A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,414
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Product details
Overview
AP1501A-50T5G-U from Diodes Incorporated is a monolithic 150kHz, 5A non-synchronous PWM buck DC/DC converter with fixed 5V output, integrated power switch, thermal shutdown, and current-limit protection. It operates from 4.5V to 40V input, delivers ±4% output voltage accuracy at 5V under full load, and uses TO220-5 package with metal tab connected to GND for thermal management. It is used in industrial power supplies requiring high-efficiency step-down regulation.
For engineers reviewing the AP1501A-50T5G-U datasheet, AP1501A-50T5G-U pinout, AP1501A-50T5G-U application, or AP1501A-50T5G-U equivalent, key selection criteria include input voltage range (4.5–40V), guaranteed 5A output capability, fixed 5V output tolerance, ON/OFF shutdown control interface, and thermal performance in TO220-5 package without external MOSFET.
Technical Context
The AP1501A-50T5G-U implements voltage-mode PWM control with internal 1.23V reference and 150kHz ±15% oscillator, enabling stable regulation without external compensation components. Its non-synchronous architecture relies on an external Schottky catch diode and requires no gate driver circuitry.
Feedback is taken directly from the output via the FB pin, where internal error amplifier compares divided output voltage against 1.23V reference. Shutdown is logic-controlled via SD pin: <1.3V enables regulation; >2.0V disables it, reducing quiescent current to 150–250µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% (4.8–5.2V at 0.2–5A load) |
| Max Output Current | 5A continuous - supports high-power point-of-load conversion without external switch |
| Input Voltage Range | 4.5V to 40V - compatible with 12V/24V industrial rails and wide-input battery systems |
| Switching Frequency | 150kHz ±15% - enables use of compact 22µH inductors and reduces EMI vs lower-frequency alternatives |
| Efficiency | 78% typical at VIN=12V, IOUT=5A - balances thermal dissipation and size for TO220-5 package |
| Thermal Protection | Internal thermal shutdown - prevents junction temperature exceeding +125°C during overload or poor heatsinking |
| Shutdown Quiescent Current | 150–250µA at VIN=40V - enables low-power standby in battery-backed systems |
Pinout & Package
AP1501A-50T5G-U is housed in a TO220-5 package with exposed metal tab electrically connected to Pin 3 (GND) for thermal conduction to heatsink. The package requires mechanical mounting and thermal interface material for reliable operation above 3A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Positive input supply | Accepts 4.5–40V; requires local ceramic bypass capacitor to handle switching transients |
| 2 Output | Switching node | Drives external inductor; swings between ~VIN–1.6V (ON) and –0.5V (OFF); minimal copper area recommended |
| 3 Gnd | Power and signal ground | Common return for IC, external diode, and output capacitor; metal tab is tied to this pin |
| 4 FB | Feedback input | Monitors output via resistor divider; internal 1.23V reference sets regulation point for fixed 5V version |
| 5 SD | Shutdown control | Logic-level input: <1.3V = ON, >2.0V = OFF; sinks up to 25µA when pulled high |
Key Features
| Feature | Design Value |
|---|---|
| Built-in 5A power switch | Eliminates need for external MOSFET and gate driver, reducing BOM count and layout complexity |
| Internal compensation | Enables stable loop response with only two external resistors (for adjustable versions) or none (fixed 5V) |
| Thermal shutdown + current limit | Protects against sustained overloads and ambient overheating without external sensing circuitry |
| ON/OFF logic control | Allows system-level power sequencing using standard 3.3V/5V logic signals without level-shifting |
| RoHS-compliant & halogen-free | Meets EU Directive 2011/65/EU and Diodes' "Green" standard (<900ppm Br/Cl, <1000ppm Sb) |
Applications
| Industrial Power Supply | Embedded Control Board |
|---|---|
|
Use Scenario: 24V rail conversion to 5V for PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: Primary step-down regulator supplying microcontroller, ADCs, and digital isolators. Use Value: Delivers stable 5V at 5A with 78% efficiency at 12V input, minimizing heat generation in enclosed enclosures. |
Use Scenario: On-board 12V-to-5V conversion for ARM-based industrial controllers. IC Role / Device Role / Timing Role: Fixed-output DC/DC converter powering SoC core logic and peripheral buses. Use Value: Internal compensation and fixed 5V output eliminate trimming resistors, accelerating design validation. |
| Test Equipment Power | Motor Drive Auxiliary Supply |
|
Use Scenario: Benchtop multimeter or oscilloscope auxiliary 5V rail with low-noise requirements. IC Role / Device Role / Timing Role: Main 5V supply for analog front-end and display controller. Use Value: 150kHz switching frequency allows small LC filter (22µH + 100µF) while maintaining <1% output ripple. |
Use Scenario: Isolated gate driver bias supply in 3-phase inverter designs. IC Role / Device Role / Timing Role: Robust 5V source tolerant of 40V transients from motor back-EMF. Use Value: 40V absolute max input rating and thermal shutdown ensure reliability during fault conditions. |
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 |
|---|---|---|---|
| LM2596S-5.0 | 3A rated, 150kHz, TO263-5 package; lacks SD pin and has ±2% output tolerance | Suitable for lower-current designs; requires external shutdown transistor if logic control needed | Select when 3A output suffices and footprint compatibility with TO263-5 is prioritized |
| MP1584EN-LF-Z | 3A, 1.5MHz, SOIC-8; includes soft-start and better light-load efficiency | Higher frequency enables smaller magnetics but demands tighter layout for EMI control | Prefer for space-constrained PCBs where 3A is adequate and 1.5MHz operation is acceptable |
Compared with LM2596S-5.0 and MP1584EN-LF-Z, the AP1501A-50T5G-U uniquely delivers 5A output in TO220-5 with integrated shutdown control and 40V input rating-making it optimal for rugged industrial 5V rails where current and transient robustness outweigh high-frequency miniaturization needs.
Availability
AP1501A-50T5G-U is available at Aetrix Electronics and suitable for industrial power supplies, embedded control boards, and motor drive auxiliary supplies requiring stable component supply with long-term manufacturability planning.
Supply support for AP1501A-50T5G-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 high-reliability power management, signal integrity, and protection solutions for industrial and automotive markets.
The AP1501A series belongs to Diodes' legacy high-current buck regulator product line, designed specifically for cost-sensitive, thermally demanding industrial applications where integration, ruggedness, and ease of implementation are prioritized over ultra-high efficiency or MHz-class switching.
FAQ
What is the maximum recommended input voltage for continuous operation?
The AP1501A-50T5G-U supports continuous operation up to 40V input, with absolute maximum rating of +45V. For reliable long-term use at full 5A load, input should remain ≤40V under all conditions including transients; derating is advised above 36V to maintain junction temperature below 125°C with standard heatsinking.
Does the fixed 5V version require external feedback resistors?
No. The AP1501A-50T5G-U is factory-trimmed for fixed 5.0V output; the FB pin is internally connected to the 1.23V reference and requires no external resistors. External feedback components are only needed for the adjustable version (AP1501A-ADJ).
Can the SD pin be left unconnected for always-on operation?
Yes. Leaving the SD pin open or connecting it directly to GND forces the regulator into permanent ON state. This configuration draws 5–10mA quiescent current (not standby current), which is appropriate for mains-powered systems where shutdown is unnecessary.
Is a heatsink mandatory for 5A operation in TO220-5 package?
Yes. With θJA ≈ 31°C/W and 1.6V saturation drop at 5A, power dissipation exceeds 8W - requiring a heatsink to keep junction temperature within –20°C to +125°C operating range. Without heatsinking, thermal shutdown will activate within seconds at ambient >40°C.
AP1501A-50T5G-U Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- TO-220-5 Formed Leads
- Packaging:
- Tube
- 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:
- Through Hole
- Supplier Device Package:
- TO-220-5R
AP1501A-50T5G-U FAQ
1.How can I place an order for AP1501A-50T5G-U through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1501A-50T5G-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 AP1501A-50T5G-U reliable?
The price and inventory of AP1501A-50T5G-U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1501A-50T5G-U is usually 5 days.
3.What payment methods are accepted for AP1501A-50T5G-U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1501A-50T5G-U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1501A-50T5G-U?
AP1501A-50T5G-U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1501A-50T5G-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 AP1501A-50T5G-U?
For technical support, including AP1501A-50T5G-U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1501A-50T5G-U requirements.
6.How does Aetrix verify that AP1501A-50T5G-U is sourced from the original manufacturer or authorized distributors?
All AP1501A-50T5G-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 AP1501A-50T5G-U meets industry standards.
7.What is the process for return or replacement of AP1501A-50T5G-U?
All AP1501A-50T5G-U units undergo pre-shipment inspection (PSI). If there is an issue with AP1501A-50T5G-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 AP1501A-50T5G-U part is unused and in its original packaging.
Return procedure for AP1501A-50T5G-U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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