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Diodes Incorporated AP1530SG-13
- Part No.:
- AP1530SG-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AP1530SG-13.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,932
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Product details
Overview
AP1530SG-13 from Diodes Incorporated is a 300 kHz fixed-frequency PWM step-down DC/DC converter with integrated P-channel MOSFET, supporting 3.6–18 V input and delivering up to 3 A output current at adjustable voltages down to 0.8 V. It features internal current limiting via OCSET pin, thermal shutdown at 150°C, and enable-controlled operation-used in LCD monitors, graphic cards, and telecom power supplies.
For engineers reviewing the AP1530SG-13 datasheet, AP1530SG-13 pinout, AP1530SG-13 application, or AP1530SG-13 equivalent, key selection criteria include its 300 kHz switching frequency, internal PMOS RDS(ON) of 70–150 mΩ (dependent on VIN), 0.8 V feedback reference, 50 kHz foldback during overcurrent, and SOP-8L thermal performance (θJA = 134°C/W).
Technical Context
The AP1530SG-13 implements a voltage-mode PWM controller with an internal 0.8 V reference, error amplifier, and oscillator. Its duty cycle adjusts linearly from 0% to 100%, enabling precise regulation across wide load and line variations.
Current limit is set externally via ROCSET resistor connected between VCC and OCSET; internal 90 µA sink current establishes threshold. During overcurrent or short-circuit events, switching frequency drops from 300 kHz to 50 kHz for safe foldback operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.6 V to 18 V - supports AC adapter inputs and wide industrial supply rails. |
| Output Current | Up to 3 A - sufficient for microprocessor core supplies and peripheral power rails. |
| Switching Frequency | 300 kHz typical - balances EMI control and external component size (e.g., 22 µH inductor). |
| Feedback Reference Voltage | 0.8 V ±2% - enables precise output setting down to 0.8 V using standard resistor dividers. |
| RDS(ON) (P-MOS) | 70–150 mΩ - lower conduction loss at 12 V input improves efficiency to 92% at 5 V/3 A. |
| Thermal Shutdown Threshold | 150°C with 55°C hysteresis - prevents latch-up and enables automatic recovery after cooling. |
| Enable Input Logic | VIH ≥ 2.0 V, VIL ≤ 0.8 V - compatible with 3.3 V and 5 V logic interfaces. |
Pinout & Package
SOP-8L package with exposed thermal pad; dual SW pins (5 & 6) and dual GND pins (7 & 8) internally bonded to die pad for enhanced thermal dissipation and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB (Pin 1) | Feedback input | Monitors output voltage via resistor divider; regulates output to 0.8 V reference. |
| EN (Pin 2) | Enable control | High = normal operation; low = full shutdown with 10 µA quiescent current. |
| OCSET (Pin 3) | Overcurrent threshold setting | External resistor sets peak current limit; 90 µA internal sink defines trip point. |
| VCC (Pin 4) | IC bias supply | Internally regulated; powers internal circuitry; requires local 0.1 µF bypass capacitor. |
| Output (Pin 5 & 6) | Switch node | Drives external inductor/diode; high-current path requiring minimized trace area and copper pour. |
| VSS (Pin 7 & 8) | Power ground | Dual GND connections reduce impedance and improve thermal conduction to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P-channel MOSFET | Eliminates need for external high-side switch; reduces BOM count and layout complexity. |
| Internal compensation network | Minimizes external components-only FB resistors, input/output capacitors, inductor, and diode required. |
| Frequency foldback under fault | Switches from 300 kHz → 50 kHz during OCP/SCP to reduce stress and improve reliability. |
| Under-voltage lockout (UVLO) | Disables operation below 3.3 V VCC and re-enables above 3.5 V-prevents erratic startup. |
| Lead-free & RoHS-compliant SOP-8L | Green molding compound (no Br/Sb); meets EU Directive 2002/95/EC exemptions. |
Applications
| PCD Motherboard Power | LCD Monitor Supply |
|---|---|
|
Use Scenario: Provides stable 3.3 V or 5 V rail for chipset I/O and memory interface on desktop motherboard. IC Role / Device Role / Timing Role: Primary buck regulator supplying auxiliary power domain with fast transient response. Use Value: Internal 0.8 V reference and 3 A capability support tight regulation under dynamic load steps typical of PCIe bus activity. |
Use Scenario: Powers backlight driver ICs and timing controller in 15–24 inch LCD panels. IC Role / Device Role / Timing Role: Step-down converter generating 12 V or 19 V from 19 V AC adapter input. Use Value: 18 V max input rating allows direct use of unregulated wall adapters; 92% efficiency minimizes heat in sealed enclosures. |
| Graphic Card VRM Stage | ADSL Modem Power |
|
Use Scenario: Delivers 1.2 V core voltage to GPU logic with low ripple and high PSRR. IC Role / Device Role / Timing Role: Secondary-stage regulator following primary 12 V input; handles 2–3 A peak loads. Use Value: 300 kHz switching enables compact 22 µH inductor; soft-start time (0.3–5 ms) prevents inrush current damage. |
Use Scenario: Supplies 3.3 V and 5 V rails to DSL PHY, microcontroller, and Ethernet MAC in residential modems. IC Role / Device Role / Timing Role: Single-chip solution replacing discrete regulators and MOSFET drivers. Use Value: Enable pin allows firmware-controlled power sequencing; thermal shutdown protects against enclosure overheating. |
Availability
AP1530SG-13 is available at Aetrix Electronics and suitable for LCD monitor power, graphic card auxiliary rails, and ADSL modem supply requiring stable component supply despite end-of-life status.
Supply support for AP1530SG-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, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and Malaysia.
The AP1530 belongs to Diodes' DC/DC switching regulator product line, designed specifically for cost-sensitive, space-constrained portable and peripheral applications requiring high integration and robust protection features.
FAQ
What is the recommended inductor value for AP1530SG-13?
A 22 µH inductor is recommended for most designs, sized to maintain ~15% ripple current (0.45 A at 3 A load). Inductor DC resistance should be minimized, and saturation current rating must exceed 3.225 A (3 A + ½ × 0.45 A) to avoid core saturation under peak load.
How does the OCSET pin set overcurrent protection?
The OCSET pin sinks a precise 90 µA current. An external resistor (ROCSET) from VCC to OCSET sets the voltage threshold. When the switch-node voltage drops below this threshold during high-current pulses, overcurrent protection triggers and reduces switching frequency to 50 kHz.
Can AP1530SG-13 operate without an external diode?
No. The AP1530SG-13 uses an external Schottky diode (e.g., B340 series) in conjunction with its internal P-MOSFET to complete the buck topology. The diode provides freewheeling path during MOSFET off-time and cannot be omitted.
Is AP1530SG-13 pin-compatible with any active replacements?
No. Diodes Incorporated has not released a direct replacement for AP1530SG-13. The part is officially discontinued with no alternate part number listed in the datasheet or product change notices. Migration requires redesign using newer regulators such as AP6320x or AP6420x series.
AP1530SG-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):
- 3.6V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 18V
- 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
AP1530SG-13 FAQ
1.How can I place an order for AP1530SG-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1530SG-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 AP1530SG-13 reliable?
The price and inventory of AP1530SG-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1530SG-13 is usually 5 days.
3.What payment methods are accepted for AP1530SG-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1530SG-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1530SG-13?
AP1530SG-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1530SG-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 AP1530SG-13?
For technical support, including AP1530SG-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1530SG-13 requirements.
6.How does Aetrix verify that AP1530SG-13 is sourced from the original manufacturer or authorized distributors?
All AP1530SG-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 AP1530SG-13 meets industry standards.
7.What is the process for return or replacement of AP1530SG-13?
All AP1530SG-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1530SG-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 AP1530SG-13 part is unused and in its original packaging.
Return procedure for AP1530SG-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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