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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LT1634ACS8-1.25#PBF
IC VREF SHUNT 0.05% 8SOIC
MAX6250ACPA+
IC VREF SERIES 0.02% 8DIP
LM4040BEM3-5.0+T
IC VREF SHUNT 5V SOT23-3
TL431QD
IC VREF SHUNT ADJ 2.2% 8SOIC
MAX6125ESA+
IC VREF SERIES 1% 8SOIC
LT1460HCS3-5#TRMPBF
IC VREF SERIES 0.2% SOT23-3
TL4050B50QDCKR
IC VREF SHUNT 0.2% SC70-5
AS431HBZTR-G1
IC VREF SHUNT ADJ 0.1% TO92
ADR292GRZ
IC VREF SERIES 0.15% 8SOIC
LM285LPRE3-1-2
IC VREF SHUNT 1% TO92-3
MCP1525-I/TO
IC VREF SERIES 1% TO92-3
AD581UH
IC VREF SERIES 0.05% TO5-3
LT6657AHMS8-2.5#TRPBF
IC VREF SERIES 0.1% 8MSOP
TL432LIAQDBZR
IC VREF SHUNT ADJ 1% SOT23-3
LTC6652BHMS8-2.5#TRPBF
IC VREF SERIES 0.1% 8MSOP
LM4040C30IDCKR
IC VREF SHUNT 0.5% SC70-5
LT1634BCS8-5#TRPBF
IC VREF SHUNT 0.05% 8SOIC
REF5025IDGKT
IC VREF SERIES 0.05% 8VSSOP
LM285BXMX-1.2/NOPB
LM285-1.2-N MICROPOWER VOLTAGE R
MAX6070BAUT30+T
IC VREF SERIES 0.08% SOT23-6