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ROHM Semiconductor |
IC LNR REG CTRLR 1OUT 8MSOP |
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ROHM Semiconductor |
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ROHM Semiconductor |
IC LNR REG CTRLR 1OUT 8MSOP |
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ROHM Semiconductor |
IC LNR REG CTRLR 1OUT 8MSOP |
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ROHM Semiconductor |
IC LNR REG CTRLR 1OUT 8MSOP |
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ROHM Semiconductor |
IC LNR REG CTRLR 1OUT 8MSOP |
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Linear Regulator Controllers (LRCs) are critical components in Power Management ICs (PMICs) that maintain stable output voltages by regulating input voltage sources. Unlike switching regulators, LRCs operate by dissipating excess energy as heat, offering advantages in noise reduction and simplicity. They are essential in modern electronics for ensuring power stability in devices ranging from smartphones to industrial equipment.
| Type | Functional Features | Application Examples |
|---|---|---|
| Positive Voltage Controllers | Regulate positive input voltages with high accuracy | Mobile CPUs, DSPs |
| Negative Voltage Controllers | Designed for negative voltage rails in analog circuits | Audio amplifiers, data converters |
| Multi-Channel Controllers | Support multiple regulated outputs in single package | Networking equipment, FPGAs |
| Low-Dropout (LDO) Controllers | Minimal voltage difference between input and output | Battery-powered devices |
Typical LRCs consist of: - Reference Voltage Source: Provides stable voltage - Error Amplifier: Compares feedback with reference - Pass Transistor: Adjusts output voltage (usually BJT or MOSFET) - Protection Circuits: Overcurrent/overtemperature safeguards - Compensation Network: Ensures stability across load conditions Common packages include QFN, TSSOP, and BGA with thermal pads for heat dissipation.
| Parameter | Description | Importance |
|---|---|---|
| Input Voltage Range | Operational voltage limits (e.g., 2.7V-20V) | Determines application compatibility |
| Output Voltage Accuracy | 1% to 3% typical tolerance | System reliability assurance |
| Load Regulation | Vout/ Iout (e.g., 0.01%/mA) | Stability under varying loads |
| Quiescent Current | Idle current consumption ( A-mA range) | Battery life optimization |
| Thermal Shutdown | Protection threshold (e.g., 150 C) | Device failure prevention |
Main industries include: - Consumer Electronics: Smartphones, wearables - Automotive: ADAS, infotainment systems - Industrial: PLCs, motor drives - Medical: Imaging equipment, patient monitors - Telecommunications: Base stations, optical modules
| Manufacturer | Product Series | Key Features |
|---|---|---|
| Texas Instruments | LM1117 | 3A output, adjustable LDO |
| Analog Devices | ADP150 | 200mA, ultralow noise |
| Infineon | TLE4250 | Automotive-grade with OCP |
| STMicroelectronics | L7987 | Digital programmable |
| ON Semiconductor | NCP1117 | Fixed/adjustable options |
Key considerations: - Match input/output requirements with system specs - Prioritize thermal performance for high-current applications - Evaluate protection features for harsh environments - Consider package size vs. PCB space constraints - Balance cost with long-term reliability needs Case Study: For portable medical devices, select LDOs with <10 A quiescent current and 1% accuracy.
Emerging trends include: - Integration with digital power management interfaces - Development of ultra-low dropout (<100mV) regulators - Adoption of GaN/SiC transistors for higher efficiency - Increased focus on automotive-grade AEC-Q100 qualified parts - Miniaturization through advanced packaging (e.g., WLCSP)