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PMIC - Voltage Regulators - Linear

Image Part Number Description / PDF Quantity Rfq
NTE1923

NTE1923

NTE Electronics, Inc.

IC REG LINEAR -18V 1.5A TO3

89
NTE1974

NTE1974

NTE Electronics, Inc.

IC REG LINEAR 18V TO220 FULL PAC

187
NTE958

NTE958

NTE Electronics, Inc.

IC REG LINEAR 18V 1A TO220

80
NTE961

NTE961

NTE Electronics, Inc.

IC REG LINEAR -5V 1A TO220

1755
NTE1965

NTE1965

NTE Electronics, Inc.

IC REG LINEAR -8V TO220 FULL PAC

147
NTE967

NTE967

NTE Electronics, Inc.

IC REG LINEAR -12V 1A TO220

88
NTE931

NTE931

NTE Electronics, Inc.

IC REG LINEAR 5V 3A TO3

36
NTE7239

NTE7239

NTE Electronics, Inc.

IC-POS ADJ VOLT REG 5AMP TO-220

59
NTE964

NTE964

NTE Electronics, Inc.

IC REG LINEAR 8V 1A TO220

130
NTE1964

NTE1964

NTE Electronics, Inc.

IC REG LINEAR 8V TO220 FULL PACK

52
NTE970

NTE970

NTE Electronics, Inc.

IC REG LINEAR POS ADJ 3A TO3

69
NTE935

NTE935

NTE Electronics, Inc.

IC REG LINEAR POS ADJ 5A TO3

204
NTE1972

NTE1972

NTE Electronics, Inc.

IC REG LINEAR 15V TO220 FULL PAC

171
NTE1901

NTE1901

NTE Electronics, Inc.

IC REG LINEAR NEG ADJ 100MA TO92

104
NTE1932

NTE1932

NTE Electronics, Inc.

IC-VLTG REG POS 10V 1A TO-220

177
NTE972

NTE972

NTE Electronics, Inc.

IC REG LINEAR 24V 1A TO220

1595
NTE968

NTE968

NTE Electronics, Inc.

IC REG LINEAR 15V 1A TO220

636
NTE1908

NTE1908

NTE Electronics, Inc.

IC REG LINEAR 24V 100MA TO92

636
NTE1970

NTE1970

NTE Electronics, Inc.

IC REG LINEAR 12V TO220 FULL PAC

311
NTE1909

NTE1909

NTE Electronics, Inc.

IC REG LINEAR -24V 100MA TO92

96

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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