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Diodes Incorporated AP1501-50K5G-13
- Part No.:
- AP1501-50K5G-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
AP1501-50K5G-13.pdf
- Description:
- IC REG BUCK 5V 3A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,515
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Product details
Overview
AP1501-50K5G-13 from Diodes Incorporated is a fixed-output 5.0V, 3A non-synchronous PWM buck DC/DC converter operating at 150kHz switching frequency with integrated power switch, thermal shutdown, and current-limit protection. It uses TO263-5 package, supports 7–40V input, delivers ±4% output voltage accuracy under load, and enables compact high-efficiency step-down regulation in industrial power supplies and embedded systems.
For engineers reviewing the AP1501-50K5G-13 datasheet, AP1501-50K5G-13 pinout, AP1501-50K5G-13 application, or AP1501-50K5G-13 equivalent, key selection criteria include its fixed 5V output, 3A continuous load capability, 150kHz oscillator tolerance (±15%), ON/OFF shutdown control interface, and thermal performance in TO263-5 with θJA = 37°C/W.
Technical Context
The AP1501-50K5G-13 implements voltage-mode PWM control with internal 1.23V reference and compensation network, eliminating external loop components. Its non-synchronous architecture relies on an external Schottky catch diode (e.g., B340A) and requires only three external passive components - input capacitor, output capacitor, and inductor - for full operation.
It features logic-level ON/OFF control with VIL ≤ 1.3V (ON) and VIH ≥ 2.0V (OFF), 150μA standby quiescent current at VIN = 40V, and built-in protections including cycle-by-cycle current limiting (4.0A typ), thermal shutdown at TJ ≥ 150°C, and output short-circuit robustness via current foldback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% over 0.2–3A load and 7–40V input range |
| Switching Frequency | 150kHz ±15%; enables use of low-cost, small-footprint 33–47μH inductors |
| Max Output Current | 3A continuous; limited by internal 4.0A peak current threshold and thermal design |
| Input Voltage Range | 7V to 40V; supports wide-input industrial and automotive battery-derived rails |
| Efficiency | 80% typical at VIN = 12V, VOUT = 5V, IOUT = 3A; optimized for mid-power buck conversion |
| Shutdown Quiescent Current | 150–250μA at VIN = 40V; enables ultra-low-power standby in always-on systems |
| Thermal Resistance | θJA = 37°C/W (TO263-5, 3 in² copper); requires PCB copper area ≥0.4 in² for safe 3A operation |
Pinout & Package
AP1501-50K5G-13 is housed in a RoHS-compliant, halogen-free TO263-5 surface-mount package with exposed metal tab connected to GND for thermal conduction. The package measures 10.9 × 15.7 mm (X × Y) with 1.05 mm pad width (X1) and 2.5 mm standoff (Y2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 – VIN | Positive input supply rail | Accepts 7–40V DC; requires local ceramic bypass capacitor to suppress switching transients |
| 2 – Output | Internal power switch drain | Swings between (VIN – VSAT ≈ VIN – 1.4V) and ~–0.5V; connects to inductor and catch diode anode |
| 3 – GND | Power and signal ground reference | Common return for internal circuitry, feedback divider, and external components; tied to metal tab |
| 4 – FB | Feedback voltage sensing node | Internally referenced to 1.23V; unused in fixed 5V version but must remain unconnected or grounded per datasheet |
| 5 – SD | Shutdown logic input | Active-low enable: ≤1.3V = ON, ≥2.0V = OFF; 15μA max input current; can be tied to GND for permanent ON |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3A power switch | Eliminates need for external MOSFET driver; reduces BOM count and layout complexity |
| Internal compensation network | Enables stable regulation without external compensation components across line/load variations |
| Logic-compatible shutdown pin | Direct interface with microcontroller GPIO or system power sequencer without level-shifting |
| Thermal shutdown + current limit | Hardware-protection stack prevents damage during overload, short-circuit, or poor heatsinking |
| Fixed 5V output version | Guaranteed ±4% accuracy eliminates resistor divider tuning and improves production yield |
Applications
| Industrial PLC Power Supply | Embedded System Core Rail |
|---|---|
|
Use Scenario: Providing clean 5V/3A power to microcontroller, FPGA I/O banks, and peripheral interfaces in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator converting 24V DC field bus to regulated 5V system rail. Use Value: High efficiency (80%) and thermal robustness in confined enclosures reduce heat buildup and eliminate need for forced airflow. |
Use Scenario: Generating main 5V supply for ARM-based edge computing modules operating from 12V wall adapters or PoE-derived inputs. IC Role / Device Role / Timing Role: Compact, self-contained DC/DC converter enabling minimal external component count and rapid board bring-up. Use Value: Fixed 5V output ensures consistent voltage margining across temperature and load, simplifying compliance testing. |
| Automotive Body Control Module | Test & Measurement Instrumentation |
|
Use Scenario: Powering CAN transceivers, sensor signal conditioners, and LED drivers in 12V vehicle subsystems with transient immunity. IC Role / Device Role / Timing Role: Input-filtered buck stage handling load dump (up to 40V) and cold-crank (down to 6V) conditions. Use Value: Wide 7–40V input range and built-in current limiting ensure reliable operation during automotive electrical disturbances. |
Use Scenario: Delivering stable 5V bias to precision analog front-ends, ADC references, and digital logic in portable benchtop analyzers. IC Role / Device Role / Timing Role: Low-noise, well-regulated intermediate rail decoupled from noisy switching stages upstream. Use Value: ±4% output tolerance and 150kHz fixed frequency simplify EMI filtering and meet Class II measurement accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596S-5.0/NOPB | 3A, 150kHz, adjustable/fixed versions; requires external compensation; higher IQ (5mA vs. 10mA active) | Widely available but lacks integrated thermal shutdown flag; less robust under sustained overload | Preferred where TI ecosystem support and long-term availability outweigh need for enhanced protection |
| MP1584EN-LF-Z | 3A, 1.5MHz switching; smaller inductors possible; no integrated thermal shutdown; requires external soft-start | Better for space-constrained designs but demands tighter layout control and higher-frequency EMI mitigation | Chosen when board area is critical and thermal monitoring is handled externally |
Compared with LM2596S-5.0/NOPB and MP1584EN-LF-Z, the AP1501-50K5G-13 offers superior integrated protection (thermal + current limit), simpler layout (no compensation needed), and lower standby current - making it optimal for ruggedized, maintenance-free industrial power rails.
Availability
AP1501-50K5G-13 is available at Aetrix Electronics and suitable for industrial PLC power supplies, embedded system core rails, and automotive body control modules requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for AP1501-50K5G-13 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, automotive, and consumer markets.
The AP1501 belongs to Diodes' standard buck converter product line, designed for cost-sensitive, medium-power applications where simplicity, integration, and thermal resilience are prioritized over ultra-high efficiency or ultra-small footprint.
FAQ
Is AP1501-50K5G-13 pin-compatible with other AP1501 variants?
No - while all AP1501 versions share identical TO263-5 pinout and terminal functions, the AP1501-50K5G-13 is a fixed 5V output variant with internally trimmed feedback. Unlike the adjustable AP1501-K5G-13, its FB pin is not functional and must remain unconnected or grounded per datasheet guidance to avoid instability.
What external components are mandatory for AP1501-50K5G-13 operation?
Three mandatory components: a minimum 100μF low-ESR input capacitor (rated ≥50V), a 33–47μH shielded inductor (saturation current ≥4.5A), and a Schottky catch diode rated ≥40V/3A (e.g., B340A). An output capacitor ≥220μF is recommended for <1% ripple at 3A load.
Does AP1501-50K5G-13 support synchronous rectification?
No - it is a non-synchronous buck controller with an integrated N-channel MOSFET switch and requires an external Schottky diode for freewheeling. Synchronous operation would require replacing the diode with a second actively controlled MOSFET and gate driver, which the AP1501 does not support.
Can AP1501-50K5G-13 operate reliably at 3A continuous load without a heatsink?
Yes, when mounted on ≥2 in² of 2oz copper on a single-layer PCB in still air - thermal simulation shows junction temperature rise of ~111°C at 3A/12V→5V, staying below 125°C max rating. For ambient >50°C or sustained 3A loads, additional copper area or airflow is advised.
AP1501-50K5G-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 3A
- Frequency - Switching:
- 150kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263-5
AP1501-50K5G-13 FAQ
1.How can I place an order for AP1501-50K5G-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1501-50K5G-13 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 AP1501-50K5G-13 reliable?
The price and inventory of AP1501-50K5G-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1501-50K5G-13 is usually 5 days.
3.What payment methods are accepted for AP1501-50K5G-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1501-50K5G-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1501-50K5G-13?
AP1501-50K5G-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1501-50K5G-13 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 AP1501-50K5G-13?
For technical support, including AP1501-50K5G-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1501-50K5G-13 requirements.
6.How does Aetrix verify that AP1501-50K5G-13 is sourced from the original manufacturer or authorized distributors?
All AP1501-50K5G-13 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 AP1501-50K5G-13 meets industry standards.
7.What is the process for return or replacement of AP1501-50K5G-13?
All AP1501-50K5G-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1501-50K5G-13, 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 AP1501-50K5G-13 part is unused and in its original packaging.
Return procedure for AP1501-50K5G-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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