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Diodes Incorporated AP1501A-50T5L-U
- Part No.:
- AP1501A-50T5L-U
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-220-5
- Datasheet:
-
AP1501A-50T5L-U.pdf
- Description:
- IC REG BUCK 5V 5A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,730
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Product details
Overview
AP1501A-50T5L-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. Used in industrial power supplies requiring high-current step-down regulation.
For engineers reviewing the AP1501A-50T5L-U datasheet, AP1501A-50T5L-U pinout, AP1501A-50T5L-U application, or AP1501A-50T5L-U equivalent, key selection criteria include its 5A continuous output capability, 150kHz fixed-frequency operation enabling compact filter design, ON/OFF logic-level shutdown control, internal compensation eliminating external loop components, and thermal protection behavior under sustained load.
Technical Context
The AP1501A-50T5L-U implements voltage-mode PWM control with a built-in 1.23V reference and error amplifier. Its oscillator runs at 150kHz ±15%, generating fixed-frequency pulses to drive the internal N-channel MOSFET switch.
Feedback is closed via the FB pin monitoring output through a resistive divider (not required for fixed 5V version), while the SD pin accepts TTL/CMOS-compatible logic signals to enable or disable switching-pulling SD below 1.3V enables regulation, above 2.0V disables it, reducing quiescent current to 150–250µA in standby.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% across 0.2A–5A load and 8V–40V input range |
| Switching Frequency | 150kHz ±15%; enables use of smaller inductors (e.g., 22µH) and output capacitors |
| Continuous Output Current | 5A; achieved using on-chip N-MOSFET switch with 1.5–1.6V saturation voltage at 5A |
| Input Voltage Range | 4.5V to 40V; supports wide-range industrial and automotive battery-fed inputs |
| Efficiency | 78% typical at VIN=12V, VOUT=5V, IOUT=5A; optimized for mid-power buck conversion |
| Shutdown Quiescent Current | 150–250µA at VIN=40V; enables low-power system sleep modes |
| Thermal Protection | Internal thermal shutdown activates above TJ ≈ 125°C; prevents permanent damage during overload or poor heatsinking |
Pinout & Package
AP1501A-50T5L-U is housed in a TO220-5 package with exposed metal tab electrically connected to Pin 3 (GND) for thermal conduction to an external heatsink. The package requires mechanical mounting and thermal interface material for reliable 5A operation above ambient temperatures >50°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Power input supply rail | Accepts 4.5–40V DC; requires local 100µF+ low-ESR input capacitor to handle pulsed switching currents |
| 2 (Output) | Switch node | Drives external catch diode and inductor; swings between ~VIN–1.6V and –0.5V; must be routed with minimal copper area to reduce EMI |
| 3 (GND) | Power and signal ground reference | Common return for internal circuitry, feedback amplifier, and metal tab; must be low-impedance connection to PCB ground plane |
| 4 (FB) | Output voltage feedback input | Internally tied to 5V output for fixed version; unused externally; open-circuit tolerant |
| 5 (SD) | Logic-level shutdown control | Active-low enable: <1.3V = ON, >2.0V = OFF; sinks up to 25µA when pulled high |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5A power switch | Eliminates need for external MOSFET, reducing BOM count and layout complexity in high-current buck designs |
| Internal compensation network | Enables stable regulation without external Type-II/III compensation components-reduces design iteration time |
| Logic-compatible ON/OFF control | Direct interface with microcontroller GPIO pins; no level-shifting required for system power sequencing |
| Thermal shutdown + current limit | Hardware-protection stack prevents failure during short-circuit, overtemperature, or startup inrush events |
| RoHS-compliant & halogen-free | Meets EU Directive 2011/65/EU and Diodes' "Green" standard (<900ppm Br/Cl, <1000ppm Sb) |
Applications
| Industrial PLC Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Providing regulated 5V rail for microcontrollers, CAN transceivers, and sensor interfaces in programmable logic controllers operating from 12–24V DC bus. IC Role / Device Role / Timing Role: Primary step-down regulator delivering 5V/5A with line/load regulation <±1% and immunity to input ripple from motor drives. Use Value: Eliminates need for external pass transistor or controller+MOSFET combo, reducing board area by >30% versus discrete solutions. | Use Scenario: Generating 5V for body electronics (door modules, lighting controllers) powered from vehicle battery (9–16V nominal, up to 40V load dump). IC Role / Device Role / Timing Role: High-current buck converter with thermal shutdown protecting against engine bay temperature excursions (>85°C ambient). Use Value: Withstands 40V transient surges and maintains regulation during cold-crank (down to 4.5V), ensuring MCU boot integrity. |
| Point-of-Load Telecom Board | Embedded Medical Diagnostic Equipment |
Use Scenario: Local 5V supply for FPGA I/O banks and ADC drivers on telecom line cards with space-constrained layouts. IC Role / Device Role / Timing Role: Fixed-output buck regulator operating at 150kHz to minimize EMI near sensitive RF sections. Use Value: Internal compensation and fixed frequency simplify EMI filtering-no tuning needed for FCC Class B compliance. | Use Scenario: Powering isolated digital subsystems (touchscreen UI, data logging) in portable diagnostic devices with battery + wall adapter inputs. IC Role / Device Role / Timing Role: Primary DC/DC stage converting 12V adapter or Li-ion pack (up to 40V) to clean 5V for low-noise analog front-ends. Use Value: 78% efficiency at full load extends battery runtime; shutdown pin enables coordinated power-down with host processor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP1501A-50K5G-13 | Same IC die, TO263-5 surface-mount package; θJA = 37°C/W vs. 31°C/W for TO220-5 | Requires PCB copper pour for heatsinking; unsuitable for through-hole assembly or retrofit | Select for automated SMT production where board space is constrained and airflow is limited |
| LM2596S-5.0 | 3A rated, 150kHz, adjustable/fixed versions; higher dropout, lower efficiency (~75% at 5A) | Not rated for 5A continuous; requires external heat sink even at 3A in TO220 package | Select only if legacy compatibility or dual-source requirement exists; not suitable for 5A sustained loads |
Compared with AP1501A-50K5G-13 and LM2596S-5.0, the AP1501A-50T5L-U uniquely combines 5A capability in a through-hole TO220-5 package with guaranteed ±4% output accuracy and integrated thermal/current protection-making it optimal for industrial upgrades and medium-volume power supply builds where mechanical robustness and heatsink flexibility are prioritized.
Availability
AP1501A-50T5L-U is available at Aetrix Electronics and suitable for industrial PLC power supplies, automotive body control modules, point-of-load telecom boards, and embedded medical diagnostic equipment requiring stable component supply and long-term manufacturability.
Supply support for AP1501A-50T5L-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 automotive markets.
The AP1501A series belongs to Diodes' high-current DC/DC converter product line, designed specifically for cost-sensitive, space-constrained applications needing integrated 5A buck regulation without external MOSFETs or complex compensation networks.
FAQ
What is the maximum recommended input voltage for continuous operation?
The AP1501A-50T5L-U supports continuous operation up to +40V input, with absolute maximum rating at +45V. For reliable 5A output at elevated ambient temperatures, input voltage should be kept ≤36V to limit power dissipation and junction temperature rise within safe limits using standard TO220 heatsinks.
Does the FB pin require external components for the fixed 5V version?
No. The AP1501A-50T5L-U has internal feedback routing for the fixed 5V output; the FB pin is internally connected and requires no external resistors or capacitors. Leaving FB unconnected or floating has no effect on regulation, as confirmed in the datasheet's pin description and typical application circuits.
Can the AP1501A-50T5L-U be used in synchronous rectification configurations?
No. The AP1501A-50T5L-U is a non-synchronous buck controller with an integrated N-MOSFET switch and requires an external Schottky catch diode. It lacks gate-drive outputs or timing control for a synchronous MOSFET, and its internal architecture does not support replacement of the diode with a second FET.
What thermal derating applies above 25°C ambient?
Using the TO220-5 package's θJA of 31°C/W, junction temperature rises ~155°C above ambient at 5A full load (PD ≈ 7.5W). Derating begins at ~50°C ambient: output current must be reduced linearly to 0A at ~100°C ambient to maintain TJ ≤ 125°C, assuming standard 25mm² heatsink and still air conditions.
AP1501A-50T5L-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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 5A
- 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
AP1501A-50T5L-U FAQ
1.How can I place an order for AP1501A-50T5L-U through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1501A-50T5L-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-50T5L-U reliable?
The price and inventory of AP1501A-50T5L-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-50T5L-U is usually 5 days.
3.What payment methods are accepted for AP1501A-50T5L-U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1501A-50T5L-U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1501A-50T5L-U?
AP1501A-50T5L-U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1501A-50T5L-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-50T5L-U?
For technical support, including AP1501A-50T5L-U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1501A-50T5L-U requirements.
6.How does Aetrix verify that AP1501A-50T5L-U is sourced from the original manufacturer or authorized distributors?
All AP1501A-50T5L-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-50T5L-U meets industry standards.
7.What is the process for return or replacement of AP1501A-50T5L-U?
All AP1501A-50T5L-U units undergo pre-shipment inspection (PSI). If there is an issue with AP1501A-50T5L-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-50T5L-U part is unused and in its original packaging.
Return procedure for AP1501A-50T5L-U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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