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Diodes Incorporated AP1501A-12T5RG-U
- Part No.:
- AP1501A-12T5RG-U
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
AP1501A-12T5RG-U.pdf
- Description:
- IC REG BUCK 3A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,747
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Product details
Overview
AP1501A-12T5RG-U from Diodes Incorporated is a monolithic 150kHz, 5A non-synchronous PWM buck DC/DC converter with fixed 12V output, integrated power switch, thermal shutdown, and current-limit protection. It operates from 15V to 40V input, delivers ±4% output voltage accuracy under load, and uses TO220-5 (R) package with metal tab connected to GND for thermal management. Used in industrial power supplies and embedded board-level regulators.
For engineers reviewing the AP1501A-12T5RG-U datasheet, AP1501A-12T5RG-U pinout, AP1501A-12T5RG-U application, or AP1501A-12T5RG-U equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with functional differences, and supply support for production continuity.
Technical Context
The AP1501A-12T5RG-U implements voltage-mode PWM control with a built-in 1.23V reference and internal compensation network, eliminating external loop components. Its 150kHz ±15% oscillator sets switching timing and enables use of compact 22µH inductors and low-ESR output capacitors.
It integrates a 5A DMOS power switch with 1.5V typical saturation voltage at full load, supports logic-level ON/OFF shutdown via SD pin (1.3V threshold), and features dedicated FB pin for feedback sensing - all operating across –20°C to +85°C ambient temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12V ±4% over 0.2A–5A load and 15V–40V input - ensures stable rail for microcontrollers and analog circuitry without external resistor divider. |
| Switching Frequency | 150kHz ±15% - enables use of standard 22µH shielded inductors and reduces EMI compared to lower-frequency buck converters. |
| Output Current | 5A continuous - supports high-current loads like FPGA I/O banks or motor drivers without external MOSFETs. |
| Input Voltage Range | 15V to 40V - compatible with 24V industrial bus systems and wide-input AC/DC adapters. |
| Efficiency | 88% at VIN=16V, VOUT=12V, IOUT=5A - minimizes thermal stress in enclosed enclosures without forced airflow. |
| Thermal Shutdown | Activates above +125°C junction temperature - protects device during overload or poor heatsinking conditions. |
| Quiescent Current | 10mA typical in active mode; 250µA in standby - enables low-power sleep states in battery-backed systems. |
Pinout & Package
AP1501A-12T5RG-U uses TO220-5 (R) package with exposed metal tab electrically connected to Pin 3 (GND) for thermal conduction to heatsink. Requires mechanical mounting and thermal interface material for reliable 5A operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Positive input supply | Accepts 15–40V DC; requires ≥100µF low-ESR input capacitor to handle 5A pulsed current and suppress transients. |
| 2 Output | Switching node | Drives external Schottky catch diode and inductor; voltage swings between ~VIN–1.5V and –0.5V; minimal copper area recommended to reduce EMI coupling. |
| 3 Gnd | Power and signal ground | Common return for VIN, FB, SD, and metal tab; must be low-impedance connection to minimize noise and thermal resistance. |
| 4 FB | Feedback input | Monitors output via resistive divider (not used in fixed 12V version); open-circuit or shorted to GND disables regulation - unused in this variant. |
| 5 SD | Shutdown control | Logic-compatible input: <1.3V = ON, >2.0V = OFF; draws ≤25µA when pulled high; tied to GND for always-on operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5A power switch | Eliminates need for external high-side MOSFET and gate driver, reducing BOM count and PCB footprint by >30% vs discrete solutions. |
| Internal compensation | Enables stable regulation with no external Type-II/III compensation network - simplifies layout and eliminates tuning iterations. |
| Thermal shutdown + current limit | Provides dual-layer protection: current limit triggers at 6.0A peak, thermal shutdown activates at +125°C - prevents catastrophic failure under fault conditions. |
| ON/OFF shutdown control | Reduces total input current to 250µA in standby - suitable for systems requiring rapid power cycling or low-quiescent system states. |
| TO220-5 (R) package | Right-angled leads enable vertical mounting on PCB edge or heatsink; metal tab directly bonded to GND for efficient heat transfer to external heatsink. |
Applications
| Industrial PLC Power Supply | Embedded System Board Regulator |
|---|---|
|
Use Scenario: Provides clean 12V rail for programmable logic controller I/O modules operating in factory environments with 24V DC bus input. IC Role / Device Role / Timing Role: Primary step-down regulator delivering regulated 12V at up to 5A; handles line/load transients per EN 61000-4-4/5. Use Value: Delivers 88% efficiency at full load, reducing thermal load in sealed enclosures; thermal shutdown prevents field failures during overtemperature events. |
Use Scenario: Powers FPGA core and I/O banks on an industrial-grade carrier board with space-constrained layout. IC Role / Device Role / Timing Role: Fixed-output buck converter replacing multi-component discrete designs; 150kHz switching allows compact 22µH inductor placement. Use Value: Reduces component count by 7 parts (vs discrete buck), improves reliability, and meets ±4% output tolerance required for FPGA VCCIO compliance. |
| Test Equipment Power Module | Motor Drive Auxiliary Supply |
|
Use Scenario: Generates isolated 12V bias for op-amps and ADC references in portable benchtop test instruments powered from 24V Li-ion packs. IC Role / Device Role / Timing Role: High-efficiency main DC/DC stage; shutdown pin enables synchronized power-down with host MCU. Use Value: 250µA standby current extends battery life; ±4% output stability ensures measurement accuracy across temperature and load variation. |
Use Scenario: Supplies gate drive and logic power for 3-phase BLDC motor controllers in HVAC blowers using 24V input. IC Role / Device Role / Timing Role: Robust auxiliary supply tolerant to motor-induced voltage spikes and load dumps up to 40V. Use Value: Withstands 40V absolute max input and includes current limiting to survive short-circuit faults on gate driver outputs. |
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-12/NOPB | 3A rated, 150kHz, TO263-5 package; no SD pin; ±2% output tolerance | Limited to 3A loads; lacks shutdown control; requires external compensation | Select if lower cost and 3A max load suffice; avoid for 5A or logic-controlled power sequencing. |
| MP1584EN-LF-Z | 3A rated, 1.5MHz, SOIC-8; adjustable/fixed versions; integrated soft-start | Higher frequency enables smaller magnetics but higher EMI; lower current rating | Choose for space-constrained designs needing <1mm height; not suitable for 5A continuous or industrial thermal profiles. |
Compared with LM2596S-12/NOPB and MP1584EN-LF-Z, AP1501A-12T5RG-U uniquely supports 5A continuous output in TO220-5(R) with integrated shutdown and thermal protection - making it the only option among the three qualified for high-current industrial 24V-to-12V conversion without derating.
Availability
AP1501A-12T5RG-U is available at Aetrix Electronics and suitable for industrial PLC power supplies, embedded system board regulators, test equipment power modules, and motor drive auxiliary supplies requiring stable component supply and long-term manufacturability.
Supply support for AP1501A-12T5RG-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 devices for industrial, computing, and consumer markets.
The AP1501A series belongs to Diodes' high-current DC/DC converter product line, designed specifically for cost-sensitive, high-reliability industrial applications requiring integrated 5A buck regulation with minimal external components.
FAQ
What is the maximum input voltage for AP1501A-12T5RG-U?
The absolute maximum input voltage is +45V, but the recommended operating range is 15V to 40V. Operation above 40V risks exceeding internal transistor breakdown limits and may trigger premature thermal shutdown due to increased power dissipation. For 24V nominal systems, 40V headroom accommodates load-dump transients per ISO 7637-2.
Does AP1501A-12T5RG-U require external feedback resistors?
No. The "-12" suffix indicates a fixed 12V output version with internal resistor divider; the FB pin is internally connected and must not be externally biased. Connecting external components to FB may disrupt regulation or damage the internal reference. For adjustable output, use AP1501A-K5G-13 instead.
How should the metal tab on TO220-5(R) be connected?
The metal tab is electrically connected to Pin 3 (GND) and must be thermally bonded to a heatsink using conductive thermal paste or pad. Mechanical mounting pressure must ensure full surface contact. Do not insulate the tab unless using an isolated heatsink - floating or reverse-biased connections violate absolute maximum ratings and risk latch-up.
Is AP1501A-12T5RG-U RoHS and halogen-free compliant?
Yes. Per Diodes' documentation, AP1501A-12T5RG-U is fully RoHS 2 (2011/65/EU) compliant, lead-free, and halogen-antimony free ("Green"), containing <900ppm bromine, <900ppm chlorine (<1500ppm Br+Cl total), and <1000ppm antimony compounds - verified per JEDEC J-STD-709A.
AP1501A-12T5RG-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-12T5RG-U FAQ
1.How can I place an order for AP1501A-12T5RG-U through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1501A-12T5RG-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-12T5RG-U reliable?
The price and inventory of AP1501A-12T5RG-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-12T5RG-U is usually 5 days.
3.What payment methods are accepted for AP1501A-12T5RG-U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1501A-12T5RG-U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1501A-12T5RG-U?
AP1501A-12T5RG-U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1501A-12T5RG-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-12T5RG-U?
For technical support, including AP1501A-12T5RG-U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1501A-12T5RG-U requirements.
6.How does Aetrix verify that AP1501A-12T5RG-U is sourced from the original manufacturer or authorized distributors?
All AP1501A-12T5RG-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-12T5RG-U meets industry standards.
7.What is the process for return or replacement of AP1501A-12T5RG-U?
All AP1501A-12T5RG-U units undergo pre-shipment inspection (PSI). If there is an issue with AP1501A-12T5RG-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-12T5RG-U part is unused and in its original packaging.
Return procedure for AP1501A-12T5RG-U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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