INDUSTRY COMPONENT

LDO Regulator

Low-dropout linear regulator for stable voltage supply in electronic circuits

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Component Specifications

Definition
A low-dropout linear regulator is an electronic component that maintains a stable output voltage with minimal voltage difference between input and output, commonly used in power management modules to provide clean power to sensitive circuits.
Working Principle
Operates by using a pass transistor controlled by feedback circuitry to regulate output voltage, maintaining stability despite input voltage variations and load changes.
Materials
Semiconductor silicon, copper leads, plastic encapsulation (e.g., epoxy resin), gold bonding wires
Technical Parameters
  • Package Type SOT-23, DFN, SOIC
  • Output Current Up to 500mA
  • Output Voltage 1.2V to 3.3V
  • Dropout Voltage 200mV at 150mA
  • Quiescent Current 40μA typical
  • Input Voltage Range 2.5V to 5.5V
  • Operating Temperature -40°C to +125°C
Standards
ISO 9001, IEC 60747, JEDEC JESD22

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for LDO Regulator.

LDO regulator linear voltage regulator low dropout regulator power management IC voltage regulation electronic component power supply stability LDO Regulator in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

Power Management Module

Electronic component within a Graphics Interface Controller that regulates and distributes power to various sub-circuits.

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Engineering Analysis

Risks & Mitigation
  • Thermal overload
  • Input voltage spikes
  • Output short circuit
  • ESD damage
  • Load transient instability
FMEA Triads
Trigger: Excessive power dissipation
Failure: Thermal shutdown or permanent damage
Mitigation: Implement proper heat sinking, ensure adequate airflow, and monitor junction temperature
Trigger: Input voltage exceeding maximum rating
Failure: Component breakdown and catastrophic failure
Mitigation: Add input protection circuits (TVS diodes, clamping circuits) and implement voltage monitoring
Trigger: Poor PCB layout
Failure: Oscillation and instability in output voltage
Mitigation: Follow manufacturer layout guidelines, minimize trace lengths, and use proper decoupling capacitors

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±2% output voltage accuracy over temperature range
Test Method
IEC 60747 semiconductor testing standards, JEDEC thermal cycling tests, output voltage stability under load transient conditions

Buyer Feedback

★★★★☆ 4.5 / 5.0 (36 reviews)

"The LDO Regulator we sourced perfectly fits our Computer, Electronic and Optical Product Manufacturing production line requirements."

"Found 30+ suppliers for LDO Regulator on CNFX, but this spec remains the most cost-effective."

"The technical documentation for this LDO Regulator is very thorough, especially regarding technical reliability."

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Frequently Asked Questions

What is the main advantage of LDO regulators over switching regulators?

LDO regulators provide cleaner output with lower noise and ripple, making them ideal for noise-sensitive applications like RF circuits and analog sensors.

How does dropout voltage affect LDO performance?

Lower dropout voltage allows the LDO to maintain regulation with smaller input-output voltage differences, improving efficiency and enabling operation with lower input voltages.

What are common failure modes for LDO regulators?

Thermal shutdown due to excessive power dissipation, output voltage drift from aging components, and latch-up from voltage transients are typical failure modes.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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