Voltage Regulator Module (VRM)

Product Specifications

Technical details and manufacturing context for Voltage Regulator Module (VRM)

Definition

The Voltage Regulator Module (VRM) is a critical power management subsystem embedded within interface boards, responsible for converting higher input voltages (typically 12V or 5V) to the lower, tightly regulated voltages (e.g., 1.8V, 3.3V, or sub-1V) required by modern microprocessors, memory, and other integrated circuits. It ensures stable power delivery despite fluctuations in load current, preventing system instability, data corruption, or hardware damage. The VRM operates as a switching voltage regulator, typically a buck converter, using high-frequency switching of power MOSFETs and an LC filter to produce a smooth DC output. A feedback control loop with a PWM controller maintains the target voltage with high accuracy and efficiency. This module is designed for industrial and automotive applications, with an input voltage range of 9–36 V DC and an adjustable output from 0.8 to 5.0 V DC. It delivers a continuous output current of 10–60 A, with output voltage accuracy of ±1.0%, line regulation of ±0.2%, and load regulation of ±0.5%. The switching frequency ranges from 300 to 1000 kHz, and peak efficiency is 90–96% at nominal load. It operates over a temperature range of -40 to 85 °C and can be stored from -55 to 125 °C. The module is built with silicon (for MOSFETs and controller IC), copper (for PCB traces and inductor windings), ferrite cores (for inductors), ceramic/electrolytic capacitors, and FR-4 PCB substrate. Typical dimensions for a 30 A module are 25 × 15 × 8 mm, with weight depending on current rating (10–20 g). The module is suitable for use in computer, electronic, and optical product manufacturing. Always verify model-specific values and standards with the legal manufacturer or supplier before procurement.

Working Principle

The VRM operates as a switching voltage regulator, typically a buck converter. It rapidly switches a power MOSFET on and off at high frequency. An inductor-capacitor (LC) filter network then smooths this pulsed waveform into a stable DC output voltage. A feedback control loop, managed by a PWM controller IC, continuously monitors the output voltage and adjusts the switching duty cycle to maintain the target voltage level with high accuracy and efficiency.

Common Materials

Silicon (for MOSFETs and controller IC), Copper (for PCB traces and inductor windings), Ferrite Core (for inductor), Ceramic/Electrolytic (for capacitors), FR-4 (PCB substrate)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Input Voltage Range	9–36 V DC	Wide input for industrial and automotive applications
Output Voltage	0.8–5.0 V DC	Adjustable via external resistors
Output Current	10–60 A	Continuous current rating
Output Voltage Accuracy	±1.0 %	Over line, load, and temperature
Line Regulation	±0.2 %	Change in output for input variation
Load Regulation	±0.5 %	Change in output for load variation
Switching Frequency	300–1000 kHz	Higher frequency reduces component size
Efficiency	90–96 %	Peak efficiency at nominal load
Operating Temperature Range	-40–85 °C	Industrial grade
Storage Temperature Range	-55–125 °C	Non-operating
Relative Humidity	5–95 % RH	Non-condensing
Dimensions (L × W × H)	25 × 15 × 8 mm	Typical for 30 A module
Weight	10–20 g	Depends on current rating

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

PWM Controller IC Part
The brain of the VRM; generates the pulse-width modulated signal to drive the power MOSFETs based on feedback from the output.

Material: Silicon
Power MOSFETs (High-side & Low-side) Part
Semiconductor switches that rapidly turn on and off to chop the input voltage, controlled by the PWM signal.

Material: Silicon
Output Inductor Part
Stores energy during the switch-on phase and releases it during the switch-off phase, working with capacitors to smooth the output current.

Material: Copper wire, Ferrite core
Output Capacitors Part
Filter high-frequency noise and provide instantaneous current to the load during transient demand, stabilizing the output voltage.

Material: Ceramic, Polymer, or Electrolytic

Applied To / Applications

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

Interface Board

View system integration details

Graphics Processing Unit

View system integration details

Manufacturers of Voltage Regulator Module (VRM)

Manufacturer profiles associated with Voltage Regulator Module (VRM).

Sourcing Voltage Regulator Module (VRM) from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Frequently Asked Questions

What is the input voltage range of this VRM?

The input voltage range is 9–36 V DC, suitable for industrial and automotive applications. Always confirm the exact range for your specific model.

Can the output voltage be adjusted?

Yes, the output voltage is adjustable via external resistors, ranging from 0.8 to 5.0 V DC. The adjustment method may vary by model; consult the datasheet.

What is the efficiency of this VRM?

Peak efficiency is 90–96% at nominal load. Actual efficiency depends on operating conditions such as input voltage, output load, and temperature.

What are the operating temperature limits?

The operating temperature range is -40 to 85 °C, with a storage range of -55 to 125 °C. Ensure adequate cooling for reliable operation.

Data Basis

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

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Buyer enquiry

Request manufacturing insight for Voltage Regulator Module (VRM)

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.

Where it goes: Straight to the CNFX editorial desk, and to the manufacturer if this product is linked to a claimed profile. Nothing is broadcast to a supplier list.
Your details stay here: We do not sell or rent enquiry data, and we do not add you to a mailing list. Used only to answer this request.
No commission, no middleman: CNFX is a directory. We take no cut of any order and never negotiate on a supplier's behalf.
What we don't claim: A listing is not an endorsement. Qualify every supplier and verify every figure yourself before ordering.

pressure:	Atmospheric to 1.5 atm (typical PCB environment)
other spec:	Input voltage range: 4.5V to 24V DC, Output voltage accuracy: ±1%, Ripple/noise: <30mV p-p, Efficiency: 85-95%
temperature:	-40°C to +125°C (operating), -55°C to +150°C (storage)

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards