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PMIC - Voltage Regulators - Linear

Image Part Number Description / PDF Quantity Rfq
ISL9008AIEJZ-T

ISL9008AIEJZ-T

Intersil (Renesas Electronics America)

IC REG LINEAR 2.8V 150MA SC70-5

0
ISL9008AIENZ-T

ISL9008AIENZ-T

Intersil (Renesas Electronics America)

IC REG LINEAR 3.3V 150MA SC70-5

0
ISL9011IRLLZ

ISL9011IRLLZ

Intersil (Renesas Electronics America)

IC REG LINEAR 2.9V/2.9V 10DFN

0
ISL78301FVEBZ

ISL78301FVEBZ

Intersil (Renesas Electronics America)

IC REG LINEAR 5V 150MA 14HTSSOP

0
ISL9011AIRNNZ

ISL9011AIRNNZ

Intersil (Renesas Electronics America)

IC REG LINEAR 3.3V/3.3V 10DFN

0
ISL78302AR1AZ

ISL78302AR1AZ

Intersil (Renesas Electronics America)

IC REG LINEAR 1.25V/3.3V 10DFN

0
ISL9014IRFJZ-T

ISL9014IRFJZ-T

Intersil (Renesas Electronics America)

IC REG LINEAR 300MA 10DFN

6000
ISL9008AIRUBZ-T

ISL9008AIRUBZ-T

Intersil (Renesas Electronics America)

IC REG LINEAR 1.5V 150MA 6UTDFN

2751
ISL9011IRGCZ-T

ISL9011IRGCZ-T

Intersil (Renesas Electronics America)

IC REG LINEAR 2.7V/1.8V 10DFN

96000
ISL9011IRMNZ

ISL9011IRMNZ

Intersil (Renesas Electronics America)

IC REG LINEAR 3V/3.3V 10DFN

0
ISL9011IRBLZ-T

ISL9011IRBLZ-T

Intersil (Renesas Electronics America)

IC REG LINEAR 1.5V/2.9V 10DFN

5880
ISL9000IRBBZ

ISL9000IRBBZ

Intersil (Renesas Electronics America)

IC REG LIN 1.5V/1.5V 300MA 10DFN

895
ISL9016IRUJBZ-T

ISL9016IRUJBZ-T

Intersil (Renesas Electronics America)

IC REG LINEAR 2.8V/1.5V 6UTDFN

0
ISL80103IR25Z-T

ISL80103IR25Z-T

Intersil (Renesas Electronics America)

IC REG LINEAR 2.5V 3A 10DFN

6000
ISL80101AIRAJZ-T

ISL80101AIRAJZ-T

Intersil (Renesas Electronics America)

IC REG LINEAR POS ADJ 1A 10DFN

0
ISL9016IRUWKZ-T

ISL9016IRUWKZ-T

Intersil (Renesas Electronics America)

IC REG LINEAR 1.2V/2.85V 6UTDFN

0
ISL9011AIRNFZ-T

ISL9011AIRNFZ-T

Intersil (Renesas Electronics America)

IC REG LINEAR 3.3V/2.5V 10DFN

0
ISL9014IRBJZ-T

ISL9014IRBJZ-T

Intersil (Renesas Electronics America)

IC REG LINEAR 300MA 10DFN

1620
ISL9000AIRCCZ-T

ISL9000AIRCCZ-T

Intersil (Renesas Electronics America)

IC REG LINEAR 1.8V/1.8V 10DFN

0
ISL9014IRCJZ-T

ISL9014IRCJZ-T

Intersil (Renesas Electronics America)

IC REG LINEAR 300MA 10DFN

6430

PMIC - Voltage Regulators - Linear

1. Overview

Linear Voltage Regulators (LVRs) are critical components in Power Management Integrated Circuits (PMICs) that provide stable output voltage levels by dissipating excess input energy as heat. Unlike switching regulators, LVRs operate without high-frequency switching, making them ideal for noise-sensitive applications. Their importance in modern electronics includes ensuring power integrity in portable devices, industrial equipment, and automotive systems.

2. Main Types and Functional Classification

TypeFunctional FeaturesApplication Examples
Low Dropout (LDO) RegulatorsMaintain regulation with minimal input-output voltage differential (e.g., 100mV)Mobile device sensors, RF circuits
Quasi-LDO RegulatorsBalance dropout voltage and load current capabilityIntermediate power stages in IoT devices
Dual/Multi-Output LVRsSingle-chip solutions with multiple regulated outputsApplication processors in smartwatches
High-Precision LVRs 0.5% output voltage accuracy with temperature compensationMedical imaging sensors, test equipment

3. Structure and Components

Typical LVR architecture includes:

  • Reference Voltage Source (bandgap circuit)
  • Error Amplifier with feedback loop
  • Pass Transistor (NMOS/PMOS/BJT) as active regulation element
  • Thermal Shutdown and Overcurrent Protection Circuits
  • Input/Output Capacitor Interfaces

Common packages: QFN (3x3mm), TSSOP, WLCSP for portable devices. High-power variants use flip-chip with exposed thermal pads.

4. Key Technical Specifications

ParameterDescriptionImportance
Input Voltage RangeOperational voltage limits (e.g., 2.7V-5.5V)Determines compatibility with power sources
Output Voltage AccuracyDeviation from nominal value ( 1% to 3%)System stability and component protection
Dropout VoltageMinimum Vin-Vout for regulation (e.g., 30mV-300mV)Battery life optimization in portable devices
Output Current CapabilityMax continuous load current (100mA-3A)Application scalability
PSRR (Power Supply Rejection Ratio)Noise attenuation at specific frequencies (e.g., 70dB at 1kHz)Signal integrity in analog circuits
Quiescent CurrentStandby power consumption (1 A-100 A)Battery efficiency in always-on systems

5. Application Areas

  • Consumer Electronics: Smartphone APUs, SSD controllers
  • Industrial Automation: PLC signal conditioning modules
  • Automotive: ADAS sensors, infotainment system peripherals
  • Medical Devices: Portable diagnostic equipment, wearables
  • Telecommunications: Base station RF front-ends

6. Leading Manufacturers and Products

ManufacturerProduct SeriesKey Features
Texas InstrumentsTPS7A49150mA, 18V input, 75dB PSRR @ 1kHz
STMicroelectronicsLDL11171A output, adjustable via resistor divider
Analog DevicesADP151200mA, 25 A quiescent current, 200mV dropout
ON SemiconductorNCP11171A, thermal overload protection, automotive-grade

7. Selection Guidelines

Key selection criteria:

  1. Match input voltage range with power source (e.g., Li-ion battery requires 2.7V-5.5V)
  2. Prioritize low dropout voltage for battery-powered devices
  3. Calculate thermal dissipation (PD = (Vin-Vout) Iout)
  4. Select appropriate PSRR for noise-sensitive applications (e.g., 60dB for audio circuits)
  5. Consider package thermal resistance for high-current applications

    6. Case Study: A wearable ECG monitor used Analog Devices ADP150 (150mA, 2.2V output, 15 A IQ) to achieve 14-day battery life.

    8. Industry Trends

    • Emerging Ultra-Low Dropout (ULDO) designs with <50mV dropout voltage
    • Integration with PMIC digital interfaces (I2C/PMBus)
    • Advanced packaging: 3D TSV for improved thermal performance
    • Wide bandgap (GaN/SiC) pass transistors for high-voltage LVRs
    • AEC-Q100 compliant automotive LVRs with 150 C operating temperature
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