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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Diodes Incorporated AP1510SG-13

Name: AP1510SG-13
Brand: Diodes Incorporated
SKU: AP1510SG-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP1510SG-13

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: AP1510SG-13.pdf

Description:: IC REG BUCK ADJ 3A 8SOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP1510SG-13 from Diodes Incorporated is a 3A synchronous step-down DC/DC converter with integrated P-channel MOSFET, PWM control, and internal compensation. It operates from 3.6V to 23V input, delivers adjustable output (0.8V to V_CC), and features 300kHz fixed-frequency switching, current-limit protection, thermal shutdown, and enable functionality. It serves as a compact, high-efficiency power supply for microprocessor core rails in portable and networking equipment.

For engineers reviewing the AP1510SG-13 datasheet, AP1510SG-13 pinout, AP1510SG-13 application, or AP1510SG-13 equivalent, key selection considerations include its SO-8 package thermal performance (θ_JA = 134°C/W), 91% efficiency at 5V/3A, internal 70–150mΩ R_DS(ON), soft-start time (0.3–5ms), and OCSET-based current limit configuration.

Technical Context

The AP1510SG-13 implements a voltage-mode PWM controller with an internal 0.8V reference and error amplifier, enabling precise feedback regulation via external resistor divider on the FB pin. Its oscillator generates a stable 300kHz (240–360kHz) switching frequency, reduced to ~10kHz during overcurrent or short-circuit events for safe foldback operation.

It integrates a high-side P-channel MOSFET switch with R_DS(ON) of 70mΩ (typ.) at 12V V_IN, supports duty cycle control from 0% to 100%, and includes under-voltage lockout (UVLO) that disables operation below 3.3V V_CC and re-enables above 3.5V.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	3.6V to 23V - Supports wide-input applications including AC adapters and multi-cell battery systems.
Output Current	Up to 3A - Delivers sufficient power for microprocessor cores and FPGA I/O rails without external current boosting.
Switching Frequency	300kHz (typ.) - Balances EMI control, inductor size (22µH typical), and efficiency across load range.
Feedback Reference	0.8V ±2% - Enables accurate output regulation down to 0.8V with minimal external components.
R_DS(ON)	70mΩ (at V_IN = 12V) - Reduces conduction loss and improves full-load efficiency to 91% at 5V/3A.
Soft-Start Time	0.3–5ms - Limits inrush current during power-up and prevents output overshoot in sensitive loads.
Thermal Shutdown	150°C threshold with 55°C hysteresis - Protects die integrity during sustained overload or poor PCB heatsinking.

Pinout & Package

AP1510SG-13 is housed in a standard SO-8 (Green, RoHS-compliant) package with exposed thermal pad connections on pins 5/6 (Output) and 7/8 (V_SS). Dual output and ground pins reduce trace inductance and improve thermal dissipation.

Pin/Terminal	Circuit Role	Design Meaning
1 FB	Feedback input	Connects to resistor divider; regulates output by comparing against internal 0.8V reference.
2 EN	Enable control	High (≥2.0V) enables regulation; low (≤0.8V) shuts down all circuitry, reducing quiescent current to 10µA.
3 OCSET	Current limit set	External resistor from V_CC sets peak current threshold via 90µA sink current (I_OCSET).
4 V_CC	IC power supply	Bias rail derived from input; powers internal circuits and supplies current to OCSET network.
5,6 Output	Switch node	Drives external inductor/diode; dual pins minimize EMI and enhance current handling and thermal path.
7,8 V_SS	Power ground	Common return for internal circuits and power stage; dual pins reduce ground bounce and improve stability.

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	Enables stable loop response with only FB resistors and output capacitor-no external compensation required.
Programmable overcurrent protection	Adjustable current limit via single external resistor (ROCSET), supporting design flexibility across load profiles.
Low quiescent current in shutdown	10µA I_SHDN minimizes battery drain in portable standby modes.
SO-8 thermal-enhanced layout	Dual output and ground pins connect internally to die pad-enables direct copper pour for improved θ_JA performance.

Applications

Microprocessor Core Supply

Networking Power Supply

Use Scenario: Powers ARM Cortex-A series SoCs requiring tightly regulated 0.8–1.2V at up to 3A with fast transient response.

IC Role / Device Role / Timing Role: Primary buck regulator delivering core voltage with internal soft-start and current limiting.

Use Value: Achieves 91% efficiency at 1.0V/3A while maintaining <1% load regulation-reducing heat generation and simplifying thermal management.

Use Scenario: Supplies 3.3V/2A to Ethernet PHYs and switch controllers in enterprise routers and PoE injectors.

IC Role / Device Role / Timing Role: Main intermediate bus converter stepping down 12V or 24V input to stable 3.3V output.

Use Value: 300kHz fixed frequency avoids interference with Ethernet signaling bands; UVLO ensures clean startup after brownout recovery.

PC Motherboard VRM

Graphic Card Auxiliary Rail

Use Scenario: Generates 5V standby (5VSB) or auxiliary 3.3V rails on ATX motherboards with space-constrained layouts.

IC Role / Device Role / Timing Role: Compact secondary regulator replacing discrete solutions in constrained VRM zones.

Use Value: SO-8 footprint and internal MOSFET reduce board area by >40% vs. controller+external FET designs.

Use Scenario: Provides 1.8V or 1.2V GPU memory interface supply in discrete graphics cards with strict ripple limits.

IC Role / Device Role / Timing Role: Low-noise, low-ripple buck converter with optimized ESR-sensitive output filtering.

Use Value: Output ripple <15mV_pp (measured) meets GDDR6 timing margin requirements without additional LDO post-regulation.

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	Higher 1.5A rated current, 1.2MHz switching, N-channel MOSFET driver (requires external high-side FET)	Requires external MOSFET and compensation; better suited for higher-frequency, lower-current designs	Select when board space allows external FET and higher f_SW is needed for smaller magnetics.
LM2678SD-5.0/NOPB	Fixed 5V output, 5A rating, 260kHz f_SW, no OCSET programmability	Non-adjustable output; lacks current limit tuning and soft-start adjustability	Choose only if fixed 5V output and higher current are mandatory, and design flexibility is secondary.

Compared with MP1584EN-LF-Z and LM2678SD-5.0/NOPB, AP1510SG-13 uniquely combines adjustable output, integrated P-MOSFET, programmable current limit, and SO-8 thermal optimization-making it optimal for space- and efficiency-constrained 3A core supply applications where external component count must be minimized.

Availability

AP1510SG-13 is available at Aetrix Electronics and suitable for microprocessor core supply, networking power supply, and PC motherboard VRM applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.

Supply support for AP1510SG-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 high-reliability power management, signal integrity, and protection solutions for industrial, computing, and communications markets.

The AP1510 belongs to Diodes' PWM-controlled DC/DC converter product line, designed specifically for compact, efficient, and thermally robust point-of-load regulation in portable and infrastructure equipment.

FAQ

What is the minimum recommended input voltage for reliable AP1510SG-13 startup?

The AP1510SG-13 incorporates an under-voltage lockout (UVLO) circuit that disables operation below 3.3V on the V_CC pin and resumes normal regulation only when V_CC rises above 3.5V. Therefore, the minimum reliable input voltage is 3.6V per datasheet specifications-ensuring stable startup and avoiding intermittent oscillation during brownout conditions.

How is output voltage adjusted using the FB pin?

Output voltage is set by a resistor divider between V_OUT and ground, with the midpoint connected to the FB pin. The internal 0.8V reference compares against this voltage; regulation holds V_FB = 0.8V, so V_OUT = 0.8V × (1 + R_A/R_B). R_B must be 0.7kΩ–5kΩ per datasheet guidance to ensure proper bias current and noise immunity.

Can AP1510SG-13 operate without an external Schottky diode?

No-the AP1510SG-13 integrates only a P-channel high-side MOSFET and requires an external Schottky diode (or synchronous rectifier FET) for the low-side path in standard buck topology. The datasheet's typical application circuit explicitly shows D1 connected from Output to V_SS; omitting it causes improper freewheeling and potential device failure during discontinuous conduction mode.

What is the role of the OCSET pin and how is current limit configured?

The OCSET pin sinks a precise 90µA (typ.) current. Connecting a resistor R_OCSET from V_CC to OCSET sets the voltage at OCSET, which determines the peak inductor current threshold. When the sensed switch voltage falls below this level, overcurrent protection activates-reducing switching frequency to 10kHz and limiting average output current. R_OCSET is calculated using I_PEAK ≈ (V_IN – V_OUT) × D / (f_SW × L), with D ≈ V_OUT/V_IN.

AP1510SG-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:: Active

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

AP1510SG-13 FAQ

1.How can I place an order for AP1510SG-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP1510SG-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 AP1510SG-13 reliable?

The price and inventory of AP1510SG-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1510SG-13 is usually 5 days.

3.What payment methods are accepted for AP1510SG-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1510SG-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP1510SG-13?

AP1510SG-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP1510SG-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 AP1510SG-13?

For technical support, including AP1510SG-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1510SG-13 requirements.

6.How does Aetrix verify that AP1510SG-13 is sourced from the original manufacturer or authorized distributors?

All AP1510SG-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 AP1510SG-13 meets industry standards.

7.What is the process for return or replacement of AP1510SG-13?

All AP1510SG-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1510SG-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 AP1510SG-13 part is unused and in its original packaging.

Return procedure for AP1510SG-13:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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