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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LM336Z-2.5/LFT3
IC VREF SHUNT 4% TO92-3
LM4040DIZ-5.0
TWO TERMINAL VOLTAGE REFERENCE,
LM431AIM3/NOPB
IC VREF SHUNT ADJ 2.2% SOT23-3
LM285DRG4-2-5
IC VREF SHUNT 1.5% 8SOIC
MAX6033CAUT25-T
VOLTAGE REFERENCE
MAX6126AASA25+
IC VREF SERIES 0.02% 8SOIC
TL1431IDT
IC VREF SHUNT ADJ 0.4% 8SO
LM4051AIM3-1.2/NOPB
IC VREF SHUNT 0.1% SOT23-3
LM385M
IC VREF SHUNT ADJ 2% 8SOIC
LM3411M5-5.0
IC VREF SHUNT 1% SOT23-5
LM4132BMF-1.8/NOPB
IC VREF SERIES 0.1% SOT23-5
REF6150IDGKT
IC VREF SERIES 0.05% 8VSSOP
TL431ACDRG4
IC VREF SHUNT ADJ 1% 8SOIC
ISL21009CFB841Z
IC VREF SERIES 0.08% 8SOIC
ATL431LIBIDQNR
IC VREF SHUNT ADJ 0.5% 4X2SON
LM4040C10IDCKR
IC VREF SHUNT 0.5% SC70-5
LM4128DQ1MF3.0/NOPB
IC VREF SERIES 1% SOT23-5
REF01HZ
IC VREF SERIES 0.5% 8CERDIP
LM4050CEM3-2.5/NOPB
IC VREF SHUNT 0.5% SOT23-3
LT1027DCN8-5#PBF
IC VREF SERIES 0.05% 8DIP