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Diodes Incorporated AP1515-SL-13
- Part No.:
- AP1515-SL-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AP1515-SL-13.pdf
- Description:
- IC REG BUCK ADJ 1.5A 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,516
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Product details
Overview
AP1515-SL-13 from Anachip Corp. is a monolithic 150 kHz, 1.5 A non-synchronous PWM buck DC/DC converter in SOP-8L package with internal power switch, fixed 3.3 V output, and voltage-mode control. It operates from 4.5 V to 22 V input, delivers ±4% output accuracy at 1.5 A load, and integrates thermal shutdown and current-limit protection. Used in on-card step-down regulators requiring compact, low-cost power conversion.
For engineers reviewing the AP1515-SL-13 datasheet, AP1515-SL-13 pinout, AP1515-SL-13 application, or AP1515-SL-13 equivalent, key selection considerations include its 150 kHz fixed-frequency operation, integrated 1.5 A switch, 3.3 V fixed-output version, shutdown control via SD pin, and suitability for space-constrained 3.3 V rail generation in industrial and embedded systems.
Technical Context
The AP1515-SL-13 implements voltage-mode PWM control with an internal 1.235 V reference and 150 kHz oscillator (±15%). Its feedback loop uses a single-resistor-adjustable or fixed 3.3 V configuration, with internal compensation eliminating external components for line/load regulation.
It features logic-level shutdown (SD pin threshold ~1.3 V), thermal shutdown activation above +125 °C, and cycle-by-cycle current limiting that reduces switching frequency to 10–50 kHz when VFB drops >0.5 V below nominal-enabling robust overcurrent handling without external sensing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±4% under full operating conditions (4.75–22 V input, 0.2–1.5 A load) |
| Switching Frequency | 150 kHz ±15%; enables use of smaller inductors (e.g., 47 µH) and output capacitors vs. lower-frequency alternatives |
| Max Output Current | 1.5 A continuous; limited by internal MOSFET saturation voltage (1.25 V typ. at 2 A) and thermal resistance (70 °C/W junction-to-ambient) |
| Input Voltage Range | 4.5 V to 22 V; supports wide-input industrial rails including 12 V and 18 V nominal supplies |
| Feedback Reference | 1.23 V internal reference; used only in adjustable versions-SL-13 is fixed 3.3 V, so FB pin sets output via resistor divider in ADJ variants |
| Quiescent Current | 5–10 mA active mode; 70–200 µA in shutdown (SD = high), enabling low-power standby in battery-aware designs |
| Protection Features | Thermal shutdown (>125 °C), cycle-by-cycle current limit (2.5 A typ. in SOP-8), and undervoltage lockout implicit in VOP min. of 4.5 V |
Pinout & Package
SOP-8L (Pb-free, surface-mount) package measuring 4.80–5.30 mm × 3.70–4.10 mm × 1.40–1.75 mm height, with gull-wing leads and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Power input supply | Accepts 4.5–22 V DC; requires local ceramic bypass capacitor to handle high di/dt switching currents |
| 2 (Output) | Internal power switch drain | Swings between VIN–VSAT (~10.75 V @ 12 V input) and –0.5 V; connects to inductor and Schottky catch diode anode |
| 3 (FB) | Output voltage feedback | Monitors regulated output via resistive divider; for SL-13 (fixed 3.3 V), tied internally-external connection not required |
| 4 (GND) | Power and signal ground | Common return for internal circuitry, switch, and feedback; must be low-impedance plane connection per thermal specs |
| 5 (GND) | Power ground (redundant) | Dual GND pins (4 & 5) reduce ground path impedance and improve thermal dissipation in SOP-8L layout |
| 6 (GND) | Power ground (redundant) | Third GND pin (6) further lowers thermal resistance (θJA = 70 °C/W) and EMI coupling in high-current paths |
| 7 (SD) | Shutdown control input | Logic-compatible enable: <1.3 V = ON, >1.3 V = OFF; draws <200 µA in shutdown, supports microcontroller GPIO control |
| 8 (GND) | Power ground (redundant) | Fourth GND pin (8) ensures stable reference for SD and FB, critical for noise immunity in noisy environments |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.5 A power switch | Eliminates external MOSFET, reducing BOM count and PCB area-ideal for cost-sensitive, space-limited regulators |
| Internal compensation network | Removes need for external compensation components, simplifying design and improving stability across line/load/temperature |
| Logic-level shutdown (SD pin) | Enables system-level power sequencing and ultra-low standby current (70–200 µA), supporting energy-efficient operation |
| Thermal shutdown + current limit | Provides dual-layer protection: thermal cutoff prevents permanent damage; current limit avoids destructive overloads during short-circuit events |
| Fixed 3.3 V output version | Guarantees ±4% accuracy over temperature and load-meets tight tolerance requirements for microcontroller I/O and memory rails |
Applications
| Industrial Sensor Node Power | Embedded Microcontroller Core Rail |
|---|---|
Use Scenario: Powering low-power 32-bit MCU (e.g., ARM Cortex-M0+) and analog front-end in remote environmental sensor nodes. IC Role / Device Role / Timing Role: Primary 3.3 V buck regulator delivering stable core voltage with minimal external components. Use Value: Enables compact, single-chip solution meeting 1.5 A peak current demand while maintaining ±4% output accuracy across –40 °C to +125 °C. | Use Scenario: Generating clean 3.3 V supply for FPGA configuration banks and I/O banks in programmable logic modules. IC Role / Device Role / Timing Role: Fixed-output DC/DC converter supplying regulated rail with fast transient response and low output ripple. Use Value: Internal compensation and 150 kHz switching yield <10 mVPP ripple at full load-critical for noise-sensitive configuration interfaces. |
| POS Terminal Mainboard Supply | Smart Meter Communication Module |
Use Scenario: On-board 3.3 V rail for payment processing SoC, display driver, and USB interface in retail point-of-sale terminals. IC Role / Device Role / Timing Role: High-efficiency step-down regulator operating from 12 V adapter input. Use Value: 80% efficiency at 12 VIN/3.3 VOUT/1.5 A enables thermally constrained board layouts without heatsinking. | Use Scenario: Powering NB-IoT or PLC communication ICs in utility smart meters exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: Robust DC/DC converter with thermal shutdown and current limit for unattended field deployment. Use Value: Guaranteed operation from –40 °C to +125 °C and built-in fault protection ensure >10-year field reliability without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP1584EN-LF-Z (Monolithic Power) | Higher 1.5 MHz switching frequency, 3 A rating, external compensation, wider input (4.5–28 V) | Supports smaller magnetics but requires more design effort; better for high-density, high-efficiency designs | Select when board space is premium and efficiency >85% is required; avoid if simplicity and cost are primary drivers |
| LM2596S-3.3 (Texas Instruments) | Fixed 3.3 V, 3 A, 150 kHz, external diode, no SD pin, higher quiescent current (5–10 mA active, no shutdown mode) | Lacks logic-controlled shutdown and has no standby current spec; simpler but less flexible for power-managed systems | Choose for legacy compatibility or where shutdown control is unnecessary; verify thermal margin at 1.5 A continuous load |
Compared with MP1584EN-LF-Z and LM2596S-3.3, AP1515-SL-13 offers the lowest BOM count and smallest footprint among 1.5 A fixed 3.3 V buck converters, with integrated shutdown and proven thermal performance in SOP-8L-making it optimal for cost-driven, thermally moderate industrial applications.
Availability
AP1515-SL-13 is available at Aetrix Electronics and suitable for industrial sensor nodes, embedded microcontroller core rails, and POS terminal mainboards requiring stable component supply and long-term manufacturability.
Supply support for AP1515-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
Anachip Corp. is a Taiwan-based fabless semiconductor company specializing in analog and power management ICs since 1997, with focus on cost-optimized, high-reliability solutions for industrial and consumer markets.
The AP1515 series belongs to Anachip's DC/DC converter product line, designed specifically for simple, low-BOM-count step-down regulation in cost-sensitive embedded systems where integration, thermal robustness, and ease of layout are prioritized over ultra-high efficiency or programmability.
FAQ
What is the maximum recommended output current for continuous operation?
The AP1515-SL-13 is rated for 1.5 A continuous output current under specified thermal conditions: ambient ≤60 °C, PCB copper area ≥4 cm², and θJA = 70 °C/W. At full load and 22 V input, junction temperature reaches ~115 °C-within the +125 °C thermal shutdown threshold. Derating is advised above 60 °C ambient or with limited copper area.
Can the AP1515-SL-13 be used with an adjustable output voltage?
No-the SL-13 suffix denotes the fixed 3.3 V output version. Adjustable output requires the AP1515-ADJ variant (e.g., AP1515-ADJ-SL-13), which uses the FB pin with external resistor divider to set VOUT from 1.23 V to 18 V. The SL-13 part has internal feedback routing and cannot be reconfigured.
Is an external Schottky diode required, and what specifications are recommended?
Yes-an external Schottky diode is mandatory for flyback path conduction. Recommended specs: 3 A average current rating, ≤0.5 V forward voltage at 1.5 A, and reverse voltage ≥25 V. Datasheet examples use 3 A/40 V devices (e.g., SS34). Layout must minimize loop area between Output, diode cathode, and Co to reduce EMI and voltage spikes.
Does the AP1515-SL-13 support synchronization to an external clock?
No-it uses an internal free-running 150 kHz oscillator with ±15% tolerance and no external sync input. Frequency variation is inherent to the voltage-mode architecture and process variation. For synchronized multi-rail systems, consider alternatives like the MP2307 or TPS54302 that provide SYNC pin capability.
AP1515-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:
- 1.5A
- Frequency - Switching:
- 150kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOP
AP1515-SL-13 FAQ
1.How can I place an order for AP1515-SL-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1515-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 AP1515-SL-13 reliable?
The price and inventory of AP1515-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 AP1515-SL-13 is usually 5 days.
3.What payment methods are accepted for AP1515-SL-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1515-SL-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1515-SL-13?
AP1515-SL-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1515-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 AP1515-SL-13?
For technical support, including AP1515-SL-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1515-SL-13 requirements.
6.How does Aetrix verify that AP1515-SL-13 is sourced from the original manufacturer or authorized distributors?
All AP1515-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 AP1515-SL-13 meets industry standards.
7.What is the process for return or replacement of AP1515-SL-13?
All AP1515-SL-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1515-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 AP1515-SL-13 part is unused and in its original packaging.
Return procedure for AP1515-SL-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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