Editorial Technical Reference

Voltage Regulator (Buck Converter)

This page explains how Voltage Regulator (Buck Converter) is classified within Computer, Electronic and Optical Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A switching DC-DC power converter that steps down voltage while stepping up current from its input to output.

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Product Specifications

Technical details and manufacturing context for Voltage Regulator (Buck Converter)

Definition
This voltage regulator, specifically a buck converter, is a switching DC-DC power converter designed to step down a higher input DC voltage to a lower, regulated output DC voltage while increasing the available output current. It is a critical component within a Power Management Unit (PMU), providing stable power to sensitive electronic circuits while minimizing energy loss and heat generation. The converter operates by rapidly switching a transistor (MOSFET) on and off. When the transistor is on, energy is stored in an inductor from the input source; when off, the inductor releases this energy to the output load through a diode or synchronous switch. An output capacitor smooths the pulsed waveform, and a feedback control loop adjusts the switching duty cycle to maintain a constant output voltage despite variations in input voltage or load current. Typical input voltage range is 4.5–36 V DC, output voltage can be adjusted or fixed between 0.8–30 V DC, and continuous output current ranges from 0.5–5 A. Switching frequency ranges from 100–2000 kHz, with efficiency between 85–96% at nominal load. Line regulation is ±0.5%, load regulation ±1.0%, and output ripple is 10–50 mV peak-to-peak at full load. Operating temperature range is -40 to 85 °C, storage temperature -55 to 125 °C, and ingress protection is IP54–IP65 per IEC 60529. Dimensions vary from 25×15×8 mm to 50×30×15 mm, and weight from 5–50 g. Materials include semiconductor (silicon, GaN, or SiC), ferrite core for the inductor, copper windings/traces, ceramic or electrolytic capacitors, and PCB substrate (FR-4). These values are typical ranges; verify model-specific specifications with the manufacturer or supplier.
Working Principle
The buck converter uses a MOSFET as a high-speed switch. During the on-time, the input source connects to the inductor, storing energy magnetically. During the off-time, the inductor's magnetic field collapses, releasing energy to the output through a diode or synchronous switch. The output capacitor filters the pulsed current to produce a smooth DC voltage. A feedback loop monitors the output voltage and adjusts the duty cycle of the switching signal to keep the output constant, compensating for input voltage changes and load variations.
Common Materials
Semiconductor (Silicon/GaN/SiC), Ferrite Core (for inductor), Copper (windings/traces), Ceramic/Electrolytic (for capacitors), PCB Substrate (FR-4)
Technical Parameters
ParameterTypical rangeNotes & selection driver
Input Voltage Range4.5–36 V DCOperating range for stable regulation
Output Voltage0.8–30 V DCAdjustable or fixed versions
Output Current0.5–5 AContinuous current rating
Switching Frequency100–2000 kHzHigher frequency reduces size
Efficiency85–96 %At nominal load
Line Regulation±0.5 %Output change vs input voltage
Load Regulation±1.0 %Output change vs load current
Output Ripple10–50 mV p-pPeak-to-peak at full load
Operating Temperature-40–85 °CAmbient temperature range
Storage Temperature-55–125 °CNon-operating condition
Ingress ProtectionIP54–IP65Dust and water resistanceIEC 60529
Dimensions (L×W×H)25×15×8–50×30×15 mmDepends on power rating
Weight5–50 gVaries with package

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Control IC Part
    Generates the PWM signal, manages feedback loop, and provides protection features (over-current, over-temperature).
    Material: Semiconductor (Silicon)
  • Power MOSFET Part
    The main switching transistor that controls the flow of current to the inductor.
    Material: Semiconductor (Silicon/GaN/SiC)
  • Inductor Part
    Stores and releases energy during the switching cycle to facilitate voltage step-down.
    Material: Copper wire, Ferrite/Powdered Iron core
  • Output Capacitor Part
    Filters the switched waveform to provide a smooth, low-ripple DC output voltage.
    Material: Ceramic, Tantalum, or Aluminum Electrolytic
  • Feedback Resistor Divider Part
    Senses the output voltage and provides a scaled-down signal to the control IC's feedback pin.
    Material: Thin/Thick Film Resistor (on PCB)
  • Diode / Synchronous Switch
    Carries the inductor current during the off-time; without it the loop breaks every cycle.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Power Management Unit
View system integration details

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 1 atm (standard), not pressure-sensitive
other spec: Input voltage range: 4.5V to 60V, Output current: up to 10A, Switching frequency: 100kHz to 2MHz, Efficiency: 85-95%
temperature: -40°C to +125°C (operating), -55°C to +150°C (storage)
Media Compatibility
✓ DC power supplies ✓ Battery-powered systems ✓ Industrial automation equipment
Unsuitable: High-vibration or shock environments without proper mounting
Sizing Data Required
  • Input voltage range (Vin_min to Vin_max)
  • Required output voltage (Vout)
  • Maximum output current (Iout_max)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Thermal Overstress
Cause: Excessive heat due to poor heat sinking, high ambient temperatures, or overloading, leading to semiconductor junction failure or thermal runaway in components like MOSFETs and diodes.
Electrolytic Capacitor Degradation
Cause: Aging from prolonged exposure to high temperatures or voltage stress, causing electrolyte evaporation, increased ESR (Equivalent Series Resistance), and eventual open or short circuit failure.
Maintenance Indicators
  • Audible high-frequency whining or buzzing from the inductor or capacitors, indicating component stress or impending failure.
  • Visual signs such as bulging or leaking capacitors, discolored or charred PCB areas, or burnt smell from overheating components.
Engineering Tips
  • Ensure proper thermal management by maintaining adequate airflow, using heatsinks on power components, and avoiding operation near maximum temperature ratings to prevent thermal stress.
  • Implement regular preventive maintenance, including cleaning dust buildup, checking for loose connections, and monitoring input/output voltages and temperatures to detect early degradation.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
IEC 61000-6-2:2019 - Electromagnetic compatibility (EMC) - Generic standards - Immunity standard for industrial environments UL 60950-1 - Safety of Information Technology Equipment

Quoted from the published standard.

Manufacturing Precision
  • Output Voltage Accuracy: +/-2% of nominal voltage
  • Switching Frequency Tolerance: +/-10% of specified frequency
Quality Inspection
  • Thermal Cycling Test (-40°C to +85°C for 100 cycles)
  • Load Regulation Test (0-100% load variation with voltage stability measurement)

Manufacturers of Voltage Regulator (Buck Converter)

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 6 September 2026

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Frequently Asked Questions

What is the input voltage range for this buck converter?

The typical input voltage range is 4.5 to 36 V DC. However, the exact range depends on the specific model and must be verified with the manufacturer or supplier.

Can the output voltage be adjusted?

Yes, the output voltage can be adjustable or fixed, depending on the version. The typical range is 0.8 to 30 V DC. Always check the datasheet for the specific model.

What is the efficiency of this converter?

Efficiency typically ranges from 85% to 96% at nominal load. Actual efficiency varies with input/output voltage difference, load current, and switching frequency.

What are the operating temperature limits?

The operating ambient temperature range is -40 to 85 °C, and storage temperature is -55 to 125 °C. Ensure adequate cooling within these limits.

Data basis: editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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