PMIC - Voltage Reference
PMIC - Voltage Reference: Precision Power Management Components
Definition & Functionality
PMIC - Voltage References are specialized integrated circuits (ICs) within the Power Management IC (PMIC) category, designed to generate a stable, precise DC voltage regardless of variations in input voltage, load conditions, or temperature. These components serve as critical "voltage standards" for analog and mixed-signal circuits, ensuring accuracy in applications like data converters, sensors, and power supplies.
Types & Key Variations
1. Series Voltage References: Provide a fixed output with low dropout voltage, ideal for battery-powered devices.
2. Shunt Voltage References: Operate like precision Zener diodes, suited for high-accuracy, low-current systems.
3. Adjustable Voltage References: Allow output customization via external resistors, offering design flexibility.
4. Bandgap References: Leverage semiconductor bandgap properties for ultra-stable outputs across temperature ranges.
5. Buried Zener References: Deliver the highest precision (e.g., 0.04%) for metrology or medical equipment.
Selection Guidelines
- Accuracy & Tolerance: Prioritize < 1% tolerance for precision systems (e.g., ADCs).
- Temperature Coefficient (TempCo): Choose <10ppm/ C for environments with thermal fluctuations.
- Noise Performance: Opt for low-noise (<10 Vpp) designs in sensitive analog circuits.
- Package & Power: Match SOT-23 (portable) or SOIC (industrial) packages to your PCB constraints.
- Long-Term Stability: Critical for automotive/industrial apps; verify datasheet aging specs (e.g., 50ppm/1000hr).
Why It Matters
Voltage References are the unsung heroes of reliable electronics, minimizing drift and noise in power rails. From IoT sensor calibration to aerospace systems, selecting the right type ensures optimal performance and longevity. Partner with trusted suppliers (e.g., Texas Instruments, Analog Devices) to source certified components with traceable quality data.
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ADR420ARM-REEL7
IC VREF SERIES PREC 2.048V 8MSOP
ADR435BRZ-REEL7
IC VREF SERIES 0.04% 8SOIC
ISL60002BIH326Z-TK
IC VREF SERIES 0.04% SOT23-3
LM4050BIX3-5.0
LM4050 50PPM PER DEGREE CELSIUS
TS431ILT
IC VREF SHUNT ADJ 2% SOT23-5
TL431ACDBZR
IC VREF SHUNT ADJ 1% SOT23-3
LTC6655BHLS8-2.5#PBF
IC VREF SERIES 0.025% 8CLCC
ADR444ARZ-REEL7
IC VREF SERIES 0.13% 8SOIC
TLVH431AQPK
IC VREF SHUNT ADJ 1% SOT89-3
LM4132DMFX-3.3/NOPB
IC VREF SERIES 0.4% SOT23-5
TLV431BQDBVT
IC VREF SHUNT ADJ 0.5% SOT23-5
LM285Z-1.2G
IC VREF SHUNT 1% TO92-3
MAX6071BAUT21+T
IC VREF SERIES 0.08% SOT23-6
LM4050BIM3-2.1-T
PRECISION MICROPOWER SHUNT VREF
REF5025AID
IC VREF SERIES 0.1% 8SOIC
TL431QPKG3
IC VREF SHUNT ADJ 2.2% SOT89-3
LT6654BIS6-3.3#TRMPBF
IC VREF SERIES 0.1% TSOT23-6
MAX6023EBT50+
IC VREF SERIES 5V 5UCSP
LT1004CD-2-5
IC VREF SHUNT 0.8% 8SOIC
LMV431CM5X
IC VREF SHUNT ADJ 1.5% SOT23-5