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Diodes Incorporated AP1509-SL-13
- Part No.:
- AP1509-SL-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AP1509-SL-13.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,571
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Product details
Overview
AP1509-SL-13 from Diodes Incorporated is a monolithic 150 kHz, 2A non-synchronous PWM buck DC-DC converter in SO-8 package with integrated power switch, fixed 5V output, ±4% output voltage tolerance at full load, thermal shutdown, and logic-level ON/OFF shutdown control. It delivers regulated 5V/2A output from 7–22V input for compact on-card power supplies.
For engineers reviewing the AP1509-SL-13 datasheet, AP1509-SL-13 pinout, AP1509-SL-13 application, or AP1509-SL-13 equivalent, this device is selected for cost-sensitive 5V point-of-load regulation where board space, internal compensation, and fixed-frequency operation are critical design constraints.
Technical Context
The AP1509-SL-13 implements voltage-mode PWM control with an internal 1.23V reference and 150 kHz oscillator (±15%). Its feedback loop uses a single-resistor divider for fixed-output versions, eliminating external compensation components.
It integrates a 2A N-channel MOSFET switch with 1.25V typical saturation voltage at 2A, operates up to 22V input, and enters low-power standby (<150 µA) when the SD pin is pulled high. Current limit triggers frequency foldback below 0.5V on FB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% (4.75–5.25V) under 0.2–2A load and 7–22V input - ensures stable logic supply without trimming. |
| Switching Frequency | 150 kHz ±15% - enables use of smaller, lower-cost 39–47 µH inductors and reduces EMI compared to sub-100 kHz regulators. |
| Max Output Current | 2A continuous - supports microcontroller cores, FPGAs, and peripheral ICs without external pass devices. |
| Input Voltage Range | 4.5V to 22V - accommodates 5V, 12V, and 24V rail inputs across industrial and automotive auxiliary systems. |
| Efficiency | 83% at VIN=12V, VOUT=5V, IOUT=2A - minimizes thermal load in enclosed PCB environments. |
| Shutdown Quiescent Current | 70–150 µA - enables ultra-low-power system sleep modes without external LDO sequencing. |
| Thermal Protection | Internal thermal shutdown - prevents permanent damage during sustained overload or poor heatsinking. |
Pinout & Package
AP1509-SL-13 is housed in a standard lead-free SO-8 package (4.90 × 6.00 mm, 1.27 mm pitch), with exposed pad not electrically connected. Thermal resistance θJA = 70°C/W (typical on 1 oz copper, 3 in² area).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Positive input supply | Accepts 4.5–22V; requires local 10–100 µF low-ESR capacitor to handle pulsed 2A switch current. |
| GND (Pins 2, 4, 5, 7) | Power and signal ground | Four dedicated GND pins reduce ground impedance and improve noise immunity in high-dI/dt switching paths. |
| FB (Pin 3) | Feedback input | Internally tied to 1.23V reference; unused in fixed 5V version but must remain unconnected per datasheet. |
| SD (Pin 6) | Shutdown control | Logic-compatible input: <1.3V = ON, >2.0V = OFF; pulls total supply current to ≤150 µA in shutdown. |
| Output (Pin 8) | Switch node | Drives external Schottky catch diode and LC filter; requires minimized PCB copper area to reduce EMI coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 2A power switch | Eliminates external MOSFET and gate driver, reducing BOM count and layout complexity for 5V/2A rails. |
| Internal compensation | Enables stable regulation with only input/output capacitors and inductor - no external RC network required. |
| Fixed 5V output version | Guaranteed 4.75–5.25V over temperature and line/load - suitable for USB-powered peripherals and logic ICs. |
| Logic-level shutdown (SD) | Direct interface with MCU GPIO or PMIC enable signals without level-shifting circuitry. |
| Thermal and current protection | Auto-recovery thermal shutdown + current-limit foldback prevent latch-up during short-circuit or overtemperature events. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Powering isolated CAN transceivers and digital I/O drivers on a 24V-powered programmable logic controller backplane. IC Role / Device Role / Timing Role: Primary 5V step-down regulator supplying microcontroller peripherals and optocoupler bias rails. Use Value: Delivers 2A at 83% efficiency with built-in thermal protection, enabling compact, convection-cooled module design without forced air. |
Use Scenario: Generating 5V for microcontroller, LIN transceiver, and LED driver ICs in a 12V automotive body electronics node. IC Role / Device Role / Timing Role: Main 5V power source with logic-controlled shutdown for sleep/wake cycling. Use Value: 70–150 µA standby current and 150 kHz fixed frequency simplify EMC filtering and meet OEM quiescent current targets. |
| Point-of-Load for FPGA Boards | USB-C Powered Peripheral Hub |
|
Use Scenario: Local 5V rail generation for FPGA configuration memory, transceivers, and I/O banks on a multi-rail development board. IC Role / Device Role / Timing Role: Compact, self-contained buck converter replacing discrete switcher solutions. Use Value: SO-8 footprint and internal compensation reduce PCB area by >30% versus controller+MOSFET designs. |
Use Scenario: Regulating 5V from USB-C PD input (5–20V) to power USB 3.x hub controllers and Type-A ports. IC Role / Device Role / Timing Role: Input-flexible 5V buck stage accepting variable upstream voltage while maintaining tight output regulation. Use Value: 4.5–22V input range and ±4% output tolerance ensure compatibility across USB-C PD profiles without re-design. |
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 |
|---|---|---|---|
| MP1584EN-LF-Z (Monolithic Power) | 3A rated, 1.5 MHz switching, requires external compensation, wider input (4.5–28V) | Better suited for higher-current or space-constrained designs needing faster transient response | Select when >2A output or <1 MHz switching is required; adds external compensation complexity. |
| LM2678SX-5.0/NOPB (TI) | 5A rated, 260 kHz, external MOSFET, requires compensation network and bootstrap capacitor | Targeted at higher-power industrial supplies with greater thermal margin and flexibility | Choose for 5A loads or when adjustable output and external FET control are needed; larger BOM and layout effort. |
Compared with MP1584EN-LF-Z and LM2678SX-5.0/NOPB, AP1509-SL-13 offers lowest system-level cost and smallest footprint for 2A/5V applications, trading off current headroom and frequency agility for integration simplicity and qualification maturity.
Availability
AP1509-SL-13 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive BCMs, FPGA point-of-load supplies, and USB-C powered hubs requiring stable component supply and long-term manufacturability.
Supply support for AP1509-SL-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 power management, signal integrity, and protection solutions for industrial, automotive, and consumer markets.
The AP1509 series belongs to Diodes' standard DC-DC converter product line, designed for cost-effective, board-space-efficient step-down regulation in non-automotive-qualified applications where reliability and ease of use are prioritized over AEC-Q100 compliance.
FAQ
Is AP1509-SL-13 pin-compatible with other AP1509 variants?
No - AP1509-SL-13 is the fixed 5V version (AP1509-50SG-13), while AP1509-SG-13 is adjustable and AP1509-33SG-13 is 3.3V. Pinouts are identical, but FB pin behavior differs: it is internally connected for fixed outputs and must be externally configured for adjustable versions. Swapping without verifying feedback network risks overvoltage.
What is the minimum input voltage required for stable 5V output at 2A?
The datasheet specifies a minimum operating input voltage of 4.5V, but for reliable 5V/2A regulation, VIN ≥ 7V is required. At VIN = 7V, duty cycle approaches 100%, increasing conduction loss and thermal stress; 12V input is recommended for optimal efficiency and thermal margin.
Can AP1509-SL-13 drive a synchronous rectifier?
No - AP1509-SL-13 is a non-synchronous buck converter with an internal N-channel MOSFET and requires an external Schottky catch diode. It lacks the complementary gate drive or timing control needed for synchronous rectification; no provision exists for connecting an external low-side FET.
Does AP1509-SL-13 meet AEC-Q100 for automotive use?
No - AP1509-SL-13 is not AEC-Q100 qualified. Diodes Incorporated explicitly states that automotive-grade versions require separate PPAP-capable part numbers and IATF 16949 manufacturing; this part is intended for industrial and commercial applications only.
AP1509-SL-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 2A
- Frequency - Switching:
- 150kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOP
AP1509-SL-13 FAQ
1.How can I place an order for AP1509-SL-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1509-SL-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 AP1509-SL-13 reliable?
The price and inventory of AP1509-SL-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1509-SL-13 is usually 5 days.
3.What payment methods are accepted for AP1509-SL-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1509-SL-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1509-SL-13?
AP1509-SL-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1509-SL-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 AP1509-SL-13?
For technical support, including AP1509-SL-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1509-SL-13 requirements.
6.How does Aetrix verify that AP1509-SL-13 is sourced from the original manufacturer or authorized distributors?
All AP1509-SL-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 AP1509-SL-13 meets industry standards.
7.What is the process for return or replacement of AP1509-SL-13?
All AP1509-SL-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1509-SL-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 AP1509-SL-13 part is unused and in its original packaging.
Return procedure for AP1509-SL-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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