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Diodes Incorporated AP1501A-50T5RG-U
- Part No.:
- AP1501A-50T5RG-U
- Manufacturer:
- Diodes Incorporated
- Package:
- -
- Datasheet:
-
AP1501A-50T5RG-U.pdf
- Description:
- IC REG BUCK 3A TO220-5
- Quantity:
- Payment:
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Inventory:4,278
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Product details
Overview
AP1501A-50T5RG-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 8V to 40V input, delivers ±4% output voltage accuracy under load, and supports logic-level ON/OFF shutdown control. Used in industrial power supplies and embedded system point-of-load regulation.
For engineers reviewing the AP1501A-50T5RG-U datasheet, AP1501A-50T5RG-U pinout, AP1501A-50T5RG-U application, or AP1501A-50T5RG-U equivalent, key selection factors include its TO220-5 (R) package thermal performance, 5A continuous output capability, internal compensation eliminating external loop components, and compatibility with standard Schottky catch diodes and 22µH inductors in fixed-output configurations.
Technical Context
The AP1501A-50T5RG-U implements voltage-mode PWM control with a fixed 150kHz ±15% oscillator, enabling compact LC filter design. Its internal 5A N-channel DMOS switch and 1.23V reference feed into an error amplifier that compares FB voltage against VFB to regulate duty cycle.
Thermal shutdown activates at ~125°C junction temperature; current limit triggers at 5.5–6.5A peak switch current. The SD pin accepts 0.6V (ON) / 2.0V (OFF) logic thresholds, sinking up to 25µA at VIH, and reduces quiescent current to 150–250µA in standby mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% across 0.2A–5A load and 8V–40V input - ensures stable rail for microcontrollers and logic without external feedback resistors. |
| Switching Frequency | 150kHz ±15% - enables use of low-cost, low-ESR 22µH inductors and reduces EMI compared to higher-frequency alternatives. |
| Output Current | 5A continuous - supports high-current loads like FPGA I/O banks or motor drivers without external MOSFETs. |
| Input Voltage Range | 4.5V to 40V - accommodates wide-input industrial supplies, battery-backed systems, and automotive transient conditions. |
| Efficiency | 78% at VIN=12V, IOUT=5A - balances thermal dissipation and conversion loss in TO220-5 (R) package with heatsink. |
| Shutdown Quiescent Current | 150–250µA - minimizes standby power in always-on systems such as remote sensors or security controllers. |
| Thermal Resistance θJA | 31°C/W (TO220-5R, 3in² copper) - requires external heatsink for sustained 5A operation above ambient 60°C. |
Pinout & Package
AP1501A-50T5RG-U uses the TO220-5 (R) package with exposed metal tab electrically connected to GND. The tab must be mounted to a heatsink or large PCB copper area for thermal management. Pin 1 (VIN) and Pin 2 (Output) carry high dI/dt switching currents; layout requires short, wide traces and local bypass capacitance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Positive input supply | Accepts 4.5–40V DC; requires ≥100µF low-ESR input capacitor placed within 5mm to suppress switching transients. |
| 2 Output | Switching node | Drives external Schottky diode and inductor; voltage swings between (VIN – 1.6V) and ≈–0.5V; avoid large copper pour here to reduce EMI coupling. |
| 3 Gnd | Power ground | Common return for internal circuitry and switch; connect directly to power plane under IC tab; separate analog ground not required. |
| 4 FB | Feedback input | Monitors output via resistor divider (not used in fixed-5V version); bias current ≤60nA allows high-value dividers if reconfigured. |
| 5 SD | Shutdown control | Logic-compatible enable: <0.6V = ON, >2.0V = OFF; sinks 25µA max at VIH; tie to GND for always-on operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5A power switch | Eliminates external MOSFET and gate driver, reducing BOM count and PCB footprint in 5V step-down designs. |
| Internal compensation network | Enables stable regulation with no external compensation components - simplifies design validation and reduces layout sensitivity. |
| Thermal shutdown + current limit | Protects against sustained overload and ambient overheating without external sensing circuitry - improves field reliability. |
| Logic-level ON/OFF control | Direct interface with MCU GPIO or system supervisor ICs without level-shifting - supports dynamic power sequencing. |
| RoHS-compliant, halogen-free | Meets EU Directive 2011/65/EU and Diodes' "Green" standard (<900ppm Br/Cl, <1000ppm Sb) - suitable for eco-sensitive industrial deployments. |
Applications
| Industrial Power Supply | Embedded System Point-of-Load |
|---|---|
|
Use Scenario: Converting 24V factory bus to regulated 5V for PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: Primary buck regulator delivering 5V/5A with line/load regulation <±1% and thermal fault recovery. Use Value: Replaces discrete controller+MOSFET solutions, cutting bill-of-materials cost by 30% and improving MTBF through integrated protection. |
Use Scenario: Providing clean 5V rail to ARM Cortex-M7 microcontroller and peripheral ICs on a compact edge-node PCB. IC Role / Device Role / Timing Role: Fixed-output DC/DC converter with fast transient response (<50µs to settle after 2A load step) and low-noise operation. Use Value: Internal compensation and 150kHz switching minimize output ripple (<50mVpp) without complex filtering - meets EMC Class B limits. |
| Automotive Body Control Module | Test & Measurement Equipment |
|
Use Scenario: Generating 5V from 12V vehicle battery for infotainment USB ports and CAN transceivers under cold-crank (6.5V) and load-dump (40V) conditions. IC Role / Device Role / Timing Role: Input-tolerant buck regulator with overvoltage clamp and thermal foldback during extended high-temp operation. Use Value: 40V absolute max input rating and built-in current limit prevent latch-up during battery transients - eliminates need for upstream TVS. |
Use Scenario: Powering precision ADC front-ends and DAC buffers in portable multimeters requiring low-noise, stable 5V reference rails. IC Role / Device Role / Timing Role: Low-quiescent-current buck converter operating in continuous conduction mode with <150µA standby draw. Use Value: Standby current of 150–250µA extends battery life in handheld instruments; ±4% output tolerance maintains measurement accuracy. |
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/NOPB | 3A rated, 150kHz, TO263-5 package; lower current capacity and no SD pin - requires external enable circuitry. | Suitable for ≤3A loads only; lacks integrated shutdown control and has higher dropout at low input voltages. | Select when board space permits larger inductor and thermal budget allows lower current density. |
| MP1584EN-LF-Z | 3A, 1.5MHz, SOIC-8; higher frequency enables smaller magnetics but increases switching loss and EMI filtering complexity. | Better for compact designs with tight size constraints; less suitable for high-temperature industrial enclosures due to SOIC thermal limits. | Choose for portable equipment where PCB area is critical and input voltage remains stable near 12V. |
Compared with LM2596S-5.0/NOPB and MP1584EN-LF-Z, the AP1501A-50T5RG-U uniquely combines 5A output, logic-controlled shutdown, and TO220-5(R) thermal robustness - making it optimal for industrial 24V-to-5V conversion where reliability under sustained load and ambient heat outweighs ultra-compact form factor requirements.
Availability
AP1501A-50T5RG-U is available at Aetrix Electronics and suitable for industrial power supplies, embedded system point-of-load regulation, and automotive body control modules requiring stable component supply and long-term manufacturability support.
Supply support for AP1501A-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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal devices for power management, signal integrity, and connectivity applications.
The AP1501A series belongs to Diodes' high-current DC/DC converter product line, designed specifically for cost-sensitive, thermally demanding industrial and embedded applications requiring integrated 5A switching capability and minimal external components.
FAQ
What is the maximum recommended input voltage for reliable operation?
The AP1501A-50T5RG-U has an absolute maximum VIN rating of +45V, but the recommended operating range is 8V to 40V. Operation above 40V risks exceeding internal voltage tolerances during transients, especially with poor input filtering. For automotive applications subject to load dump, a 40V-rated input capacitor and optional external TVS are advised to maintain long-term reliability.
Can the AP1501A-50T5RG-U be used in adjustable-output configurations?
No - the AP1501A-50T5RG-U is a fixed 5.0V output variant. Only the AP1501A-ADJ versions (e.g., AP1501A-T5RG-U) support adjustable output via external resistor divider on the FB pin. Attempting to modify the feedback path on the -50 variant will not yield stable regulation due to internal voltage reference hardwiring.
What thermal management is required for full 5A output at 85°C ambient?
At 85°C ambient and 5A load, the TO220-5(R) package requires a minimum 30cm² (≈4.7in²) copper pad with 2oz thickness and a finned aluminum heatsink (≥15°C/W) to hold junction temperature below 125°C. Without forced airflow, thermal resistance must be ≤18°C/W total (θJA + heatsink), achievable only with direct-mount heatsink and thermal interface material.
Is the SD pin compatible with 3.3V logic microcontrollers?
Yes - the SD pin's VIH threshold is 2.0V (min), and VIL is 0.6V (max), making it fully compatible with standard 3.3V CMOS outputs. A 3.3V GPIO driving SD high disables the regulator, drawing only 150–250µA; no level shifter or pull-up resistor is needed, though a 10kΩ pull-down is recommended for default-on behavior during reset.
AP1501A-50T5RG-U Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- 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:
- -
- Supplier Device Package:
- -
AP1501A-50T5RG-U FAQ
1.How can I place an order for AP1501A-50T5RG-U through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1501A-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 AP1501A-50T5RG-U reliable?
The price and inventory of AP1501A-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 AP1501A-50T5RG-U is usually 5 days.
3.What payment methods are accepted for AP1501A-50T5RG-U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1501A-50T5RG-U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1501A-50T5RG-U?
AP1501A-50T5RG-U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1501A-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 AP1501A-50T5RG-U?
For technical support, including AP1501A-50T5RG-U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1501A-50T5RG-U requirements.
6.How does Aetrix verify that AP1501A-50T5RG-U is sourced from the original manufacturer or authorized distributors?
All AP1501A-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 AP1501A-50T5RG-U meets industry standards.
7.What is the process for return or replacement of AP1501A-50T5RG-U?
All AP1501A-50T5RG-U units undergo pre-shipment inspection (PSI). If there is an issue with AP1501A-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 AP1501A-50T5RG-U part is unused and in its original packaging.
Return procedure for AP1501A-50T5RG-U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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