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Diodes Incorporated AP1501-50T5RG-U
- Part No.:
- AP1501-50T5RG-U
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
AP1501-50T5RG-U.pdf
- Description:
- IC REG BUCK 3A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,309
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Product details
Overview
AP1501-50T5RG-U from Diodes Incorporated is a fixed 5.0V, 3A non-synchronous PWM buck DC/DC converter in TO220-5(R) package, operating at 150kHz ±15%, with integrated 3A switch, thermal shutdown, current limit, and ON/OFF shutdown control - used as primary voltage regulator in industrial power supplies feeding microcontrollers and sensors.
For engineers reviewing the AP1501-50T5RG-U datasheet, AP1501-50T5RG-U pinout, AP1501-50T5RG-U application, or AP1501-50T5RG-U equivalent, key selection criteria include its 4.75–40V input range, ±4% output voltage tolerance at 3A load, 80% efficiency at 12VIN/5VOUT, and thermal resistance of 31°C/W (junction-to-ambient, TO220-5R).
Technical Context
The AP1501-50T5RG-U implements voltage-mode PWM control with internal 1.235V reference and fixed 150kHz oscillator, enabling stable regulation without external compensation. Its non-synchronous architecture uses an integrated N-channel MOSFET switch and requires an external Schottky catch diode (e.g., B340A).
Feedback is taken directly from the output via the FB pin, comparing against the internal reference to adjust duty cycle; shutdown is asserted by pulling SD pin above 2.0V, reducing quiescent current to 150–250μA in standby mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% (4.8–5.25V) across 0.2–3A load and -20°C to +85°C ambient |
| Switching Frequency | 150kHz ±15% (127–173kHz), enabling use of compact 47μH inductors and low-ESR output capacitors |
| Max Output Current | 3A continuous load capability with internal current limit set at 3.6–5.5A peak |
| Input Voltage Range | 4.5V to 40V operation, supporting 12V/24V industrial rails and battery-backed systems |
| Efficiency | 80% typical at VIN=12V, VOUT=5V, IOUT=3A - reduces thermal load vs. linear regulators |
| Thermal Resistance | θJA = 31°C/W (TO220-5R, 3in² copper, no airflow), requiring heatsink for >1.5A at high VIN/VOUT differentials |
| Shutdown Quiescent Current | 150–250μA at VIN=40V, enabling low-power sleep modes in battery-powered equipment |
Pinout & Package
AP1501-50T5RG-U is housed in a TO220-5(R) package with exposed metal tab electrically connected to GND, requiring mechanical mounting to heatsink and electrical isolation from other potentials.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VIN | Positive input supply | Accepts 4.5–40V DC; requires local 100μF low-ESR input capacitor to suppress switching transients |
| 2: Output | Internal power switch drain | Swings between ~VIN–1.4V (ON) and ~–0.5V (OFF); connects to inductor and catch diode anode |
| 3: Gnd | Power and signal ground reference | Common return for VIN, FB, SD, and metal tab; must be low-impedance star point near input/output caps |
| 4: FB | Output voltage feedback sense | Monitors regulated 5V output directly (no resistor divider needed for fixed version); bias current ≤100nA |
| 5: SD | Shutdown logic input | Active-high enable: <1.3V = ON, >2.0V = OFF; sinks ≤25μA when pulled high; open or grounded = always ON |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3A power switch | Eliminates external MOSFET driver and gate resistor, reducing BOM count and layout complexity |
| ±4% output voltage accuracy | Guaranteed over full temperature and load range - enables direct powering of 5V logic without post-regulation |
| Thermal shutdown + current limit | Protects device during overload, short-circuit, or inadequate heatsinking - latches off until cooldown |
| 150kHz fixed-frequency operation | Enables predictable EMI filtering and consistent inductor sizing across designs using standard 47μH chokes |
| Lead-free & halogen-free (Green) | Meets RoHS 2 (2011/65/EU) and Diodes' "Green" spec (<900ppm Br/Cl, <1000ppm Sb) for eco-compliant manufacturing |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
|
Use Scenario: Regulating 12V vehicle battery to stable 5V for MCU, CAN transceivers, and sensor interfaces in under-hood ECUs. IC Role / Device Role / Timing Role: Primary non-isolated step-down regulator supplying core logic voltage with ON/OFF control synchronized to ignition state. Use Value: 80% efficiency at 12V→5V/3A minimizes heat buildup in sealed enclosures; thermal shutdown prevents failure during sustained load dump events. |
Use Scenario: Powering 5V peripherals (LIN transceivers, LED drivers, EEPROM) from 24V industrial rail in programmable logic controllers. IC Role / Device Role / Timing Role: Fixed-output buck converter delivering clean 5V with minimal external components - no feedback resistors required. Use Value: ±4% output tolerance ensures reliable operation of 5V-tolerant digital ICs; 40V max input withstands 36V surge testing per IEC 61000-4-5. |
| Point-of-Sale Terminal Power | Network Edge Device |
|
Use Scenario: Converting 12V adapter output to 5V for ARM-based payment terminal mainboard, including USB host and display backlight drivers. IC Role / Device Role / Timing Role: Main system regulator with shutdown control tied to system sleep/wake signals to reduce standby power. Use Value: 150–250μA shutdown current extends battery backup runtime; TO220-5R package allows bolt-on heatsink for intermittent 3A bursts during print or comms. |
Use Scenario: Providing 5V bias to Ethernet PHY, PoE interface controller, and fan controller in compact network switches. IC Role / Device Role / Timing Role: High-current local regulator placed near load to minimize IR drop and noise coupling on dense PCBs. Use Value: Low saturation voltage (1.3–1.5V) maintains regulation margin at high ambient temperatures; metal tab GND improves EMC grounding. |
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 |
|---|---|---|---|
| AP1501-50K5G-13 | Same silicon, TO263-5 package, tape-and-reel packaging, θJA = 37°C/W (vs. 31°C/W) | Better suited for surface-mount automated assembly; lower thermal performance requires larger PCB copper area | Select for SMT production where board space permits and heatsinking relies on PCB copper rather than discrete heatsink |
| LM2576-5.0 | 5.0V fixed, 3A, 52kHz switching, higher dropout, no integrated SD pin - requires external shutdown transistor | Lower frequency eases EMI filtering but needs larger inductor; lacks native logic-controlled shutdown | Choose when legacy design reuse or lower EMI sensitivity outweighs need for 150kHz size/efficiency benefits |
Compared with AP1501-50K5G-13, the T5RG-U offers superior thermal management in through-hole installations with heatsinks, while LM2576-5.0 trades switching speed for simpler magnetics and broader legacy support - neither matches the integrated shutdown and Green compliance of the AP1501-50T5RG-U.
Availability
AP1501-50T5RG-U is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and embedded networking equipment requiring stable component supply amid ongoing NRND status.
Supply support for AP1501-50T5RG-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 solutions for industrial, computing, and automotive markets.
The AP1501 series was designed as a cost-optimized, fully integrated buck converter family targeting high-volume applications needing simple, robust 3A DC/DC conversion without external driver circuitry.
FAQ
What is the minimum input voltage required for AP1501-50T5RG-U to regulate 5V output?
The AP1501-50T5RG-U requires ≥4.75V input to maintain 5.0V output across full load (0.2–3A) and temperature range (-20°C to +85°C). Below this, dropout occurs due to internal switch saturation voltage (~1.4V) and control circuit headroom - verified in Electrical Characteristics Table on page 5 of DS31014 Rev. 12.
Can AP1501-50T5RG-U be used without a heatsink?
At 3A load and 12V input, junction temperature rise is ~93°C (31°C/W × 3A² × RDS(on) ≈ 31 × 9 × 0.05 ≈ 14°C conduction + 79°C switching), exceeding safe limits without heatsink. Diodes' thermal data (page 9) confirms TO220-5R requires heatsink for >1.5A continuous operation - especially above 24V input.
Is the FB pin connected internally for the fixed 5V version?
Yes - the AP1501-50T5RG-U has internal feedback resistor divider connecting FB to Output and GND, setting VOUT = 5.0V. The FB pin is not accessible for adjustment; it must be left unconnected or tied directly to the 5V output node per Typical Application Circuit (page 8) - no external resistors are used or supported.
Does AP1501-50T5RG-U support synchronous rectification?
No - the AP1501-50T5RG-U is a non-synchronous buck converter with only one integrated N-channel MOSFET switch. It requires an external Schottky catch diode (e.g., B340A or PDS340) across the inductor, as shown in all application circuits (pages 8–9). Synchronous operation is not supported by this device's architecture or pinout.
AP1501-50T5RG-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
AP1501-50T5RG-U FAQ
1.How can I place an order for AP1501-50T5RG-U through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1501-50T5RG-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 AP1501-50T5RG-U reliable?
The price and inventory of AP1501-50T5RG-U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1501-50T5RG-U is usually 5 days.
3.What payment methods are accepted for AP1501-50T5RG-U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1501-50T5RG-U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1501-50T5RG-U?
AP1501-50T5RG-U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1501-50T5RG-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 AP1501-50T5RG-U?
For technical support, including AP1501-50T5RG-U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1501-50T5RG-U requirements.
6.How does Aetrix verify that AP1501-50T5RG-U is sourced from the original manufacturer or authorized distributors?
All AP1501-50T5RG-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 AP1501-50T5RG-U meets industry standards.
7.What is the process for return or replacement of AP1501-50T5RG-U?
All AP1501-50T5RG-U units undergo pre-shipment inspection (PSI). If there is an issue with AP1501-50T5RG-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 AP1501-50T5RG-U part is unused and in its original packaging.
Return procedure for AP1501-50T5RG-U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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