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Diodes Incorporated AP1506-K5G-13
- Part No.:
- AP1506-K5G-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
AP1506-K5G-13.pdf
- Description:
- IC REG BUCK ADJ 3A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,859
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Product details
Overview
AP1506-K5G-13 from Diodes Incorporated is a monolithic 150 kHz, 3A non-synchronous PWM buck DC/DC converter in TO263-5 package with integrated power switch, fixed internal compensation, and adjustable output voltage (1.23 V to 18 V). It delivers up to 3 A load current at input voltages up to 22 V, features thermal shutdown and cycle-by-cycle current limiting, and supports logic-level ON/OFF control via the SD pin. It is used in compact on-card switching regulators requiring high efficiency and minimal external components.
For engineers reviewing the AP1506-K5G-13 datasheet, AP1506-K5G-13 pinout, AP1506-K5G-13 application, or AP1506-K5G-13 equivalent, key selection considerations include its adjustable feedback architecture (VFB = 1.23 V), ±4% output voltage tolerance, 150 kHz ±15% oscillator frequency, built-in 3 A switch, and thermal protection behavior under sustained overload conditions.
Technical Context
The AP1506-K5G-13 implements voltage-mode PWM control with an internal 150 kHz oscillator and a 1.235 V precision reference. Its feedback loop uses a single-resistor divider to set output voltage, eliminating external compensation components. The device operates in continuous conduction mode and reduces switching frequency during overcurrent events when FB drops below 0.5 V.
It integrates a 3 A N-channel MOSFET switch with 1.4–1.6 V saturation voltage at full load, and employs thermal shutdown triggered above +125 °C junction temperature. Shutdown control is implemented via the SD pin, which accepts logic-level inputs (0–0.6 V for ON, ≥2.0 V for OFF) and draws ≤1 µA in active state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 150 kHz ±15% - enables use of smaller inductors (e.g., 33–47 µH) and reduces EMI filtering burden vs. lower-frequency buck converters. |
| Output Current | 3 A continuous - supports mid-power applications without external pass devices or parallel stages. |
| Feedback Reference | 1.23 V ±2.7% - sets minimum output voltage and defines resistor-divider ratio for precise adjustable regulation. |
| Input Voltage Range | 4.5 V to 22 V - accommodates wide-input industrial and automotive supply rails including 12 V and 24 V nominal systems. |
| Efficiency | Up to 89% at 12 VIN/12 VOUT/3 A - reflects low conduction loss and optimized gate drive for integrated switch. |
| Quiescent Current | 5–10 mA (active), 70–150 µA (standby) - enables low-power operation during system sleep modes. |
| Thermal Protection | Junction shutdown at +125 °C - prevents irreversible damage during sustained overload or poor heatsinking. |
Pinout & Package
AP1506-K5G-13 is housed in a TO263-5 surface-mount package with exposed metal tab (GND-connected) for thermal dissipation. The package requires ≥0.8 in² copper area on PCB for adequate thermal performance at full 3 A load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Positive input supply | Accepts 4.5–22 V DC; must be bypassed with low-ESR capacitor to handle high di/dt switching currents. |
| 2 Output | Internal power switch drain | Swings between (VIN – VSAT) and ≈−0.5 V; connects to inductor and catch diode anode; minimize copper area to reduce EMI coupling. |
| 3 GND | Power and signal ground | Common return for internal circuitry, feedback amplifier, and thermal pad; must be low-impedance connection to PCB ground plane. |
| 4 FB | Voltage feedback input | Senses output via resistor divider; regulates output by maintaining 1.23 V at this pin; bias current ≤50 nA minimizes divider error. |
| 5 SD | Shutdown control input | Logic-compatible enable/disable: <0.6 V = ON, >2.0 V = OFF; draws <1 µA; can be tied to GND if unused. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3 A power switch | Eliminates need for external MOSFET and driver, reducing BOM count and layout complexity in space-constrained designs. |
| Fixed internal compensation | Enables stable regulation across line/load/temperature without external compensation network-reduces design iteration time. |
| Adjustable output (1.23–18 V) | Supports custom rail generation (e.g., 3.3 V, 5 V, 9 V, 15 V) using only two resistors-no requalification needed per output voltage. |
| Thermal shutdown + current limit | Provides dual-layer protection: current limit triggers frequency foldback before thermal trip, extending safe operating time under fault. |
| Low standby quiescent current | 70–150 µA in shutdown enables battery-backed or always-on subsystems to meet ultra-low-power budget requirements. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
|
Use Scenario: Generating 5 V/3 A from a 12 V vehicle battery for microcontroller, CAN transceiver, and sensor interface circuits. IC Role / Device Role / Timing Role: Primary step-down regulator supplying core logic voltage; operates continuously with transient load steps up to 3 A. Use Value: Integrated switch and thermal protection ensure reliability in under-hood environments where ambient temperatures reach +85 °C. |
Use Scenario: Providing 3.3 V/3 A to an automotive infotainment head unit's application processor and memory subsystem. IC Role / Device Role / Timing Role: High-current point-of-load regulator; enabled/disabled via microcontroller GPIO to manage system power states. Use Value: 150 kHz switching allows compact 33 µH inductor and ceramic output capacitors-reducing board area and cost vs. 50 kHz alternatives. |
| Industrial PLC I/O Module | Networking Equipment Power Rail |
|
Use Scenario: Delivering 12 V/3 A to isolated RS-485 transceivers and analog front-end circuitry in programmable logic controllers. IC Role / Device Role / Timing Role: Main DC/DC stage converting 24 V field bus to regulated 12 V; withstands input transients up to 24 V. Use Value: Input range up to 22 V and ±4% output tolerance ensure stable operation despite industrial supply ripple and brownout conditions. |
Use Scenario: Generating 9 V/3 A for PoE-powered Ethernet switches' auxiliary logic and PHY interfaces. IC Role / Device Role / Timing Role: Secondary regulator downstream of primary 48 V-to-12 V conversion; handles dynamic load changes from packet bursts. Use Value: Cycle-by-cycle current limiting and frequency foldback prevent latch-up during short-circuit faults on connected ports. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable-output buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596S-ADJ/NOPB | 150 kHz fixed frequency, 3 A rating, but requires external compensation and has higher quiescent current (5 mA typical active, no true standby mode). | Lacks logic-level shutdown; not RoHS-compliant "Green" (contains brominated flame retardants); wider VIN range (4–40 V). | Prefer when input exceeds 22 V or when legacy LM2596 footprint compatibility is required; avoid for low-power standby designs. |
| MP1584EN-LF-Z | 1.5 MHz switching, 4 A rating, internal compensation, but VFB = 0.8 V and requires different resistor scaling; higher EMI risk without careful layout. | Better suited for ultra-compact designs needing smaller magnetics; less tolerant of high-temperature operation (TJ max = +125 °C same, but θJA higher). | Choose for space-constrained boards where 1.5 MHz allows <10 µH inductors; verify thermal margin at full load in sealed enclosures. |
Compared with LM2596S-ADJ/NOPB, AP1506-K5G-13 offers lower standby current and guaranteed RoHS/Green compliance; versus MP1584EN-LF-Z, it trades higher-frequency EMI challenges for proven thermal robustness and simpler feedback design at 150 kHz.
Availability
AP1506-K5G-13 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, networking equipment power rails, and embedded computing power supplies requiring stable component supply and long-term design continuity.
Supply support for AP1506-K5G-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 ICs, specializing in power management, signal integrity, and protection solutions for industrial, automotive, and consumer markets.
The AP1506 series belongs to Diodes' high-current monolithic buck converter product line, designed specifically for cost-sensitive, space-constrained applications needing integrated switching capability and simplified layout without sacrificing thermal safety or regulation accuracy.
FAQ
What is the minimum recommended input voltage for reliable operation of AP1506-K5G-13?
The absolute minimum input voltage is 4.5 V, but stable regulation requires VIN ≥ (VOUT / 0.9) + VSAT. For example, generating 5 V output demands VIN ≥ ~6.2 V to maintain >90% duty cycle margin and avoid dropout. Below this, output voltage sags and regulation degrades due to internal switch saturation and timing constraints.
Can AP1506-K5G-13 be used in synchronous rectification configurations?
No. AP1506-K5G-13 is a non-synchronous buck converter with a single integrated N-channel MOSFET and requires an external Schottky catch diode (e.g., B340LA). It lacks a second switch or gate drive outputs for synchronous rectification, and its control architecture does not support external FET timing synchronization.
How does the current-limit protection behave during sustained overload?
When peak switch current exceeds 3.6–5.5 A, the device enters current-limit mode and reduces switching frequency to ~10–50 kHz if FB falls below 0.5 V. This foldback extends safe operation time but does not maintain regulation-output voltage drops proportionally. Thermal shutdown activates if junction temperature exceeds +125 °C.
Is the TO263-5 package of AP1506-K5G-13 lead-free and halogen-free?
Yes. AP1506-K5G-13 is fully RoHS 3 compliant (2015/863/EU), lead-free, and halogen-free per Diodes' definition: Br < 900 ppm, Cl < 900 ppm (Br + Cl < 1500 ppm), Sb < 1000 ppm. The "G" suffix explicitly denotes Green compliance, verified per DS31015 Rev. 10.
AP1506-K5G-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:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 22V
- Voltage - Output (Min/Fixed):
- 1.23V
- Voltage - Output (Max):
- 18V
- 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
AP1506-K5G-13 FAQ
1.How can I place an order for AP1506-K5G-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1506-K5G-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 AP1506-K5G-13 reliable?
The price and inventory of AP1506-K5G-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1506-K5G-13 is usually 5 days.
3.What payment methods are accepted for AP1506-K5G-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1506-K5G-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1506-K5G-13?
AP1506-K5G-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1506-K5G-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 AP1506-K5G-13?
For technical support, including AP1506-K5G-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1506-K5G-13 requirements.
6.How does Aetrix verify that AP1506-K5G-13 is sourced from the original manufacturer or authorized distributors?
All AP1506-K5G-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 AP1506-K5G-13 meets industry standards.
7.What is the process for return or replacement of AP1506-K5G-13?
All AP1506-K5G-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1506-K5G-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 AP1506-K5G-13 part is unused and in its original packaging.
Return procedure for AP1506-K5G-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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