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Diodes Incorporated AP1510SL-U
- Part No.:
- AP1510SL-U
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AP1510SL-U.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,855
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Product details
Overview
AP1510SL-U from Diodes Incorporated is a PWM-controlled 3A step-down DC/DC converter with integrated P-channel MOSFET, 300kHz fixed-frequency operation, 0.8V feedback reference, and built-in current limit, thermal shutdown, and enable functionality. It delivers high-efficiency, low-ripple power for microprocessor core supplies and portable electronics operating from 3.6V–23V input.
For engineers reviewing the AP1510SL-U datasheet, AP1510SL-U pinout, AP1510SL-U application, or AP1510SL-U equivalent, key selection considerations include its internal PMOS switch, SO-8 package thermal performance (θJA = 134°C/W), adjustable overcurrent threshold via OCSET resistor, soft-start time (0.3–5ms), and compatibility with standard buck external components (inductor, diode, input/output capacitors).
Technical Context
The AP1510SL-U implements a fixed-frequency PWM control architecture with linear duty cycle adjustment (0–100%), internal 0.8V reference, and error amplifier for precise output regulation. Its oscillator operates at 300kHz (±20%) and reduces to 30kHz during overcurrent or short-circuit events.
It integrates a P-channel MOSFET switch (RDS(ON) = 70–150mΩ), under-voltage lockout (UVLO: 3.3V turn-off / 3.5V turn-on), and internal compensation to minimize external parts. The dual-output pins (5 & 6) and dual-GND pins (7 & 8) are internally tied to the die pad for enhanced thermal conduction in the SO-8 package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.6V to 23V - supports AC adapter inputs and wide-input industrial rails |
| Output Current | Up to 3A - enables single-chip supply for CPU cores and FPGA I/O banks |
| Feedback Reference | 0.8V ±2% - sets output voltage via external resistor divider (VOUT = 0.8V × (1 + RA/RB)) |
| Switching Frequency | 300kHz typical - balances EMI, inductor size, and efficiency for compact designs |
| Internal MOSFET RDS(ON) | 70mΩ @ 12V VIN - reduces conduction loss and thermal stress in SO-8 package |
| Efficiency | 91% @ 12VIN/5VOUT/3A - minimizes power loss and heatsink requirements |
| Soft-Start Time | 0.3–5ms - prevents inrush current and stabilizes startup into large capacitive loads |
Pinout & Package
AP1510SL-U is housed in a lead-free, RoHS-compliant SO-8 package with exposed thermal pad connection via pins 5, 6 (Output), and 7, 8 (VSS). Dual output and ground pins reduce trace inductance and improve thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB | Feedback input | Monitors output voltage via resistor divider; regulates VOUT to 0.8V reference |
| 2 EN | Enable control | High = normal operation; Low = full shutdown (10µA quiescent current) |
| 3 OCSET | Overcurrent threshold set | External resistor to VCC sets peak current limit (IOC ∝ 1/ROCSET) |
| 4 VCC | IC power supply | Powers internal circuitry; requires local 0.1µF bypass capacitor |
| 5, 6 Output | Switch node | Connects to inductor/diode; minimized trace area critical for EMI reduction |
| 7, 8 VSS | Ground reference | Dual GND pins tied to die pad; must be connected to large copper pour for thermal management |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P-channel MOSFET | Eliminates need for external high-side switch; simplifies layout and reduces BOM count |
| Adjustable current limit | Set via single external resistor on OCSET pin - enables precise load protection without sensing resistors |
| Thermal shutdown with hysteresis | Triggers at +150°C with +55°C hysteresis - prevents repeated cycling during overload conditions |
| Internal compensation network | Reduces external component count to only inductor, diode, and input/output capacitors |
| UVLO with 200mV hysteresis | Ensures clean startup and prevents erratic operation during brown-out conditions |
Applications
| Microprocessor Core Supply | PC Motherboard VRM |
|---|---|
Use Scenario: Powering ARM Cortex-A series or Intel Atom processor cores requiring tightly regulated 0.8–1.2V at up to 3A. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering dynamically scaled core voltage with fast transient response. Use Value: Built-in soft-start and 91% efficiency reduce thermal load and eliminate external sequencing ICs. |
Use Scenario: Generating +3.3V or +5V auxiliary rails on ATX-compliant motherboards with space-constrained layouts. IC Role / Device Role / Timing Role: Secondary buck converter for chipset I/O or memory interface power domains. Use Value: SO-8 footprint and internal compensation allow compact, low-component-count implementation meeting IPC-7351B land patterns. |
| LCD Monitor Power | Networking Power Supply |
Use Scenario: Supplying logic and backlight driver rails in 15–24" LCD panels powered from 12V or 19V adapters. IC Role / Device Role / Timing Role: Input-stage buck converter stepping down adapter voltage to stable 3.3V/5V system rails. Use Value: 23V max input rating and robust OCP/SCP ensure reliable operation across variable AC adapter outputs. |
Use Scenario: Providing isolated 3.3V/5V bias for Ethernet PHYs and PoE controllers in small-form-factor switches. IC Role / Device Role / Timing Role: Non-isolated primary-side DC/DC stage before secondary-side LDOs or isolated DC/DC modules. Use Value: 300kHz switching frequency avoids AM radio band interference while enabling <10mm² solution size. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP1584EN-LF-Z (Monolithic Power) | Higher 1.5MHz switching frequency; external N-MOSFET required; no integrated OCSET current limit | Requires external sense resistor and gate driver; better suited for ultra-compact, high-density PCBs | Select when board space is constrained and higher frequency allows smaller magnetics |
| LM2678SD-5.0/NOPB (TI) | Fixed 5V output; no adjustable FB; 5.5A rated; larger TO-263-5 package; no OCSET pin | Designed for fixed-output, high-current applications where output voltage is invariant | Select when 5V-only output and higher current headroom outweigh flexibility needs |
Compared with MP1584EN-LF-Z and LM2678SD-5.0/NOPB, AP1510SL-U uniquely combines adjustable output, integrated P-MOSFET, programmable overcurrent protection, and SO-8 thermal design - making it optimal for cost-sensitive, medium-power applications requiring design flexibility and minimal external components.
Availability
AP1510SL-U is available at Aetrix Electronics and suitable for microprocessor core supplies, PC motherboard auxiliary rails, and LCD monitor power systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AP1510SL-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 analog ICs, specializing in power management, signal integrity, and protection solutions for consumer, industrial, and computing markets.
The AP1510 belongs to Diodes' PWM DC/DC converter product line, engineered for high-efficiency, low-EMI step-down regulation in space- and cost-constrained portable and embedded systems.
FAQ
What is the maximum recommended output current for AP1510SL-U in SO-8 package?
The AP1510SL-U is rated for continuous 3A output current under recommended PCB layout conditions: 2oz copper, minimum pad layout per Diodes' SO-8 outline, and adequate thermal copper area on pins 5/6/7/8. Derating is required above +85°C ambient or with insufficient heatsinking - thermal shutdown activates at +150°C junction temperature.
How is overcurrent protection configured on AP1510SL-U?
Overcurrent protection is set by connecting an external resistor (ROCSET) between VCC and the OCSET pin. With a typical 90µA sink current at OCSET, the threshold is calculated as IOC ≈ (VCC × 0.9) / ROCSET. For example, a 10kΩ resistor yields ~1.08A limit at 12V VCC. The device reduces switching frequency to 30kHz during fault conditions.
Can AP1510SL-U operate with input voltage below 3.6V?
No - the AP1510SL-U incorporates under-voltage lockout (UVLO) that disables operation below 3.3V and re-enables only above 3.5V. Operation below 3.6V violates the Recommended Operating Conditions and risks unstable regulation or failure to start. For sub-3.6V inputs, consider Diodes' AP3418 or AP6320x series.
Is AP1510SL-U pin-compatible with other Diodes buck regulators?
No - AP1510SL-U has a unique SO-8 pinout optimized for its internal P-MOSFET topology and OCSET functionality. It is not pin-compatible with AP1507, AP1509, or AP3418. Pin mapping differs significantly: e.g., AP1507 uses separate SW and GND pins, while AP1510SL-U shares pins 5/6 as combined switch node and pins 7/8 as dual GND tied to thermal pad.
AP1510SL-U Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.6V
- Voltage - Input (Max):
- 23V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 23V
- Current - Output:
- 3A
- Frequency - Switching:
- 300kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -25°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOP
AP1510SL-U FAQ
1.How can I place an order for AP1510SL-U through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1510SL-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 AP1510SL-U reliable?
The price and inventory of AP1510SL-U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1510SL-U is usually 5 days.
3.What payment methods are accepted for AP1510SL-U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1510SL-U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1510SL-U?
AP1510SL-U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1510SL-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 AP1510SL-U?
For technical support, including AP1510SL-U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1510SL-U requirements.
6.How does Aetrix verify that AP1510SL-U is sourced from the original manufacturer or authorized distributors?
All AP1510SL-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 AP1510SL-U meets industry standards.
7.What is the process for return or replacement of AP1510SL-U?
All AP1510SL-U units undergo pre-shipment inspection (PSI). If there is an issue with AP1510SL-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 AP1510SL-U part is unused and in its original packaging.
Return procedure for AP1510SL-U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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