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

Diodes Incorporated AP34063S8G-13

Name: AP34063S8G-13
Brand: Diodes Incorporated
SKU: AP34063S8G-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP34063S8G-13

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - DC DC Switching Regulators

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

Datasheet:: AP34063S8G-13.pdf

Description:: IC REG BUCK BOOST ADJ 1.6A 8SOP

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Product details

Overview

AP34063S8G-13 from Diodes Incorporated is a monolithic DC/DC converter controller IC featuring an internal 1.25V ±2% reference, 1.6A Darlington output switch, current-limit sensing at 400mV typ, oscillator frequency up to 100kHz, and operation from 3.0V to 40V input. It supports step-up, step-down, and voltage-inverting topologies with minimal external components in SO-8 package.

For engineers reviewing the AP34063S8G-13 datasheet, AP34063S8G-13 pinout, AP34063S8G-13 application, or AP34063S8G-13 equivalent, this device is selected for cost-sensitive, medium-power non-isolated DC/DC conversion where adjustable output voltage, thermal robustness (T_J ≤ +150°C), and RoHS/Green compliance are required.

Technical Context

The AP34063S8G-13 integrates a temperature-compensated 1.25V bandgap reference, a comparator with 1.25V threshold, a controlled-duty-cycle oscillator (24–42kHz typical with 1nF timing cap), and a 1.6A Darlington output switch with V_CE(sat) = 0.45V @ 1A. Its I_Pk sense circuit enables cycle-by-cycle current limiting via external resistor.

It operates in three standard configurations: step-up (boost), step-down (buck), and inverting - each requiring only one inductor, one diode, two capacitors, and two resistors for feedback. The oscillator timing capacitor (Pin 5) directly sets t_ON/t_OFF ratio, enabling precise duty control independent of load or input variation.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	3.0V to 40V - supports wide industrial input rails including 12V, 24V, and 36V systems without pre-regulation.
Output Switch Current	1.6A peak - enables ≥500mA continuous output in buck mode or ≥200mA in boost mode with proper thermal design.
Reference Voltage	1.25V ±2% - sets output voltage accuracy via R1/R2 divider; enables stable 3.3V, 5V, 12V, or -12V generation.
Oscillator Frequency	24–42kHz typical (CT = 1nF) - balances efficiency vs. size: lower f reduces core loss; higher f allows smaller L/C.
Current Sense Threshold	400mV typ - defines overcurrent trip point; R_SC = 0.3Ω yields ~1A limit, supporting safe start-up and short-circuit protection.
Supply Current (Standby)	≤3.5mA max - ensures low quiescent power in battery-backed or always-on systems.
Package	SO-8 - surface-mount, RoHS-compliant, green, with θ_JA = 117°C/W; suitable for automated assembly and moderate power dissipation.

Pinout & Package

AP34063S8G-13 is housed in an 8-pin SOIC (SO-8) package with exposed pad not present. Pin functions are validated per Diodes DS31004 Rev. 8-3 (June 2018).

Pin/Terminal	Circuit Role	Design Meaning
1 (VCC)	Power supply input	Connects to unregulated input rail; powers internal reference, oscillator, and driver; requires local 0.1µF bypass.
2 (Comparator Inverting Input)	Error amplifier inverting input	Receives feedback voltage from output divider; compares against 1.25V reference to regulate output.
3 (Ipk Sense)	Current limit sense input	Monitors voltage across external R_SC; triggers shutdown when ≥400mV, protecting switch and inductor.
4 (Switch Emitter)	Emitter of internal Darlington switch	Return path for switch current; connects to ground in buck/boost; ties to inductor in inverting config.
5 (Timing Capacitor)	Oscillator timing node	Controls t_ON/t_OFF via CT value; 680pF–1nF typical for 30–100kHz operation.
6 (Switch Collector)	Collector of internal Darlington switch	High-side switching node; connects to inductor in buck, diode anode in boost, and transformer primary in flyback-like configs.
7 (Drive Collector)	Driver output for external transistor (optional)	Enables use of external NPN/PNP for higher current or voltage handling beyond internal 1.6A switch.
8 (GND)	Analog and power ground reference	Common return for reference, comparator, oscillator, and switch emitter; must be low-impedance and star-connected.

Key Features

Feature	Design Value
Adjustable output voltage	Set via R1/R2 divider from 1.25V reference; supports 3.3V, 5V, 12V, -5V, -12V, and custom values with <±2% initial accuracy.
Integrated 1.6A Darlington switch	Eliminates need for external high-current transistor; reduces BOM count and layout complexity in sub-500mA applications.
Low standby current (≤3.5mA)	Minimizes power loss during light-load or standby conditions - critical for energy-sensitive industrial and portable designs.
Thermal protection via junction limit	Rated for T_J ≤ +150°C; enables reliable operation in enclosed enclosures or high-ambient environments without forced cooling.
Lead-free & halogen-free "Green" construction	Complies with RoHS 2/3, JEDEC J-STD-609A Class 1, and Diodes' Green definition (<900ppm Br/Cl, <1000ppm Sb); supports eco-conscious manufacturing.

Applications

Industrial Power Supplies

Automotive Body Control Modules

Use Scenario: Generating 5V/300mA from a 12V vehicle battery for microcontroller, CAN transceiver, and sensor interface circuits.

IC Role / Device Role / Timing Role: Primary DC/DC controller implementing step-down conversion with input undervoltage lockout and current-limited soft-start.

Use Value: Delivers stable 5V output with ≤15mV load regulation and 82% efficiency at 500mA, meeting automotive transient and thermal requirements.

Use Scenario: Providing isolated -12V rail from 5V USB or MCU supply to bias op-amps in analog signal conditioning circuits.

IC Role / Device Role / Timing Role: Voltage-inverting controller using single inductor and diode; regulates negative output via feedback to Pin 2.

Use Value: Achieves -12V/100mA with ±0.12% load regulation and 60% efficiency - sufficient for low-noise analog stages where cost and component count outweigh efficiency demands.

Consumer Set-Top Box Power Rails

IoT Edge Node Power Management

Use Scenario: Stepping 24V AC/DC adapter output down to 3.3V for SoC, memory, and Wi-Fi module in streaming devices.

IC Role / Device Role / Timing Role: Buck-mode controller with external MOSFET drive capability (via Pin 7) for higher efficiency at full load.

Use Value: Enables 3.3V/500mA output with 82% efficiency and <160mV_PP ripple, meeting EMI and thermal limits in compact plastic enclosures.

Use Scenario: Boosting 3.0V Li-ion battery voltage to 5.0V for USB peripheral charging or sensor excitation in battery-powered sensors.

IC Role / Device Role / Timing Role: Step-up controller operating across full battery range (4.2V → 3.0V), maintaining regulation via adaptive duty cycle.

Use Value: Delivers 5V/200mA with 80% efficiency at 12V input and ±0.035% line/load regulation - extends runtime while ensuring consistent sensor biasing.

Equivalent & Alternatives

The following parts are listed as comparable options for similar DC/DC controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MC34063AP1G	Same topology and pinout; 1.5A switch, 2% ref, but higher I_CC (5mA max) and no Green compliance.	Legacy industrial designs; less stringent environmental requirements.	Select when legacy footprint compatibility is mandatory and RoHS-3 is not required.
LM2574N-5.0	Fixed 5V output, 0.5A switch, 52kHz f_SW, no external current sense; simpler but inflexible.	Cost-optimized 5V-only supplies where output adjustability is unnecessary.	Choose for fixed-output, lower-current applications where design simplicity outweighs configurability.

Compared with MC34063AP1G and LM2574N-5.0, AP34063S8G-13 offers superior environmental compliance, lower standby current, and full adjustability - making it optimal for new designs targeting industrial longevity and regulatory alignment, despite its "Not Recommended for New Design" note reflecting obsolescence planning rather than performance limitation.

Availability

AP34063S8G-13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, consumer set-top boxes, and IoT edge node power management requiring stable component supply and long-term manufacturability assurance.

Supply support for AP34063S8G-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 automotive markets.

The AP34063 series belongs to Diodes' legacy DC/DC controller product line, designed for cost-effective, flexible non-isolated voltage conversion in resource-constrained embedded systems where programmability and minimal external parts are essential.

FAQ

What is the maximum achievable output current using AP34063S8G-13 in step-down configuration?

The internal Darlington switch supports 1.6A peak current, but continuous output depends on thermal design and efficiency. With proper PCB copper area (≥2 sq.in. 2oz Cu), 500mA at 5V from 24V input is reliably achievable, as verified in Diodes' typical application data (DS31004 p.3). Higher currents require external switch drive via Pin 7.

Can AP34063S8G-13 operate from a 3.3V input to generate 5V output?

No - the minimum input voltage is 3.0V, but step-up operation requires V_IN < V_OUT minus diode drop and switch saturation. At 3.3V input, maximum practical boost output is ~4.5V due to V_CE(sat) ≈ 0.45V and diode VF ≈ 0.4V. For 5V output, ≥4.2V input is recommended per design equations in DS31004 p.8.

Why does the datasheet state "NOT RECOMMENDED FOR NEW DESIGN"?

This designation reflects Diodes Incorporated's product lifecycle policy: AP34063 is mature and remains in production (per Ordering Info, p.8), but newer alternatives like AP34163 or AP6320x are promoted for enhanced efficiency and integration. It does not indicate reliability issues - all electrical specs and qualification remain fully valid and supported.

Is AP34063S8G-13 compatible with PDIP-8 footprints?

No - AP34063S8G-13 uses SO-8 package (4.9mm × 6.0mm, 1.27mm pitch), while PDIP-8 is through-hole (9.5mm × 6.3mm, 2.54mm pitch). Though functionally identical, mechanical incompatibility prevents direct substitution. Use AP34063P1G for PDIP-8.

AP34063S8G-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-Up, Step-Down

Output Configuration:: Positive or Negative

Topology:: Buck, Boost

Output Type:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 3V

Voltage - Input (Max):: 40V

Voltage - Output (Min/Fixed):: 1.25V

Voltage - Output (Max):: 40V (Switch)

Current - Output:: 1.6A (Switch)

Frequency - Switching:: 100kHz

Synchronous Rectifier:: No

Operating Temperature:: 0°C ~ 105°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOP

AP34063S8G-13 FAQ

1.How can I place an order for AP34063S8G-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP34063S8G-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 AP34063S8G-13 reliable?

The price and inventory of AP34063S8G-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP34063S8G-13 is usually 5 days.

3.What payment methods are accepted for AP34063S8G-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP34063S8G-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP34063S8G-13?

AP34063S8G-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP34063S8G-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 AP34063S8G-13?

For technical support, including AP34063S8G-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP34063S8G-13 requirements.

6.How does Aetrix verify that AP34063S8G-13 is sourced from the original manufacturer or authorized distributors?

All AP34063S8G-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 AP34063S8G-13 meets industry standards.

7.What is the process for return or replacement of AP34063S8G-13?

All AP34063S8G-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP34063S8G-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 AP34063S8G-13 part is unused and in its original packaging.

Return procedure for AP34063S8G-13:

1.Submit a request within 90 days.

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

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