Shunt voltage references
Low IQ and high precision for your power and signal chain applications
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High precision
Improve precision on power rails or noncalibrated signal chain conditioning.
Standard
Simplify your design with industry standard 1.24-V or 2.5-V voltage references.
Automotive
Leverage AEC-Q100 qualified shunt voltage references for automotive designs.
Design & development resources
ATL431 adjustable shunt regulator evaluation module
The ATL431EVM-001 evaluation module (EVM) features the functionality and adjustability of the ATL431 by letting you program the cathode voltage with various resistor values. You can also set the cathode current using the various resistors in series with the supply. (...)
Shunt voltage reference external resistor quick-start calculator
This external resistor quick-start calculator tool lets you easily calculate valid external resistor values relative to voltage reference, supply and load-current bounds. With these inputs, you can instantly view the resulting calculations and use the color-coded indications to understand (...)
LM4050A25 PSpice Transient Model
Power trends
Low quiescent current (IQ)
Minimize idle power consumption with low-quiescent current (IQ) shunt voltage references. Low idle power consumption in the power supply can help you design Energy Star-rated appliances and small but reliable power adapters. Our low-IQ shunt voltage references can help your power-supply designs achieve low standby power and longer battery run times, while lowering system costs.
431 Device Nomenclature (Rev. B)
Using Voltage Supervisors in High Voltage Applications (Rev. B)
High precision
Minimize power consumption and extend battery life with our high-accuracy shunt references. Some power supplies, such as those used in servers and industrial instruments, accuracy and stability requirements demand more precise voltage references that can keep the output accurate across changes in input voltage, output load and operating temperature. Our portfolio of high-accuracy, low-temperature coefficient shunt voltage references help enable a more efficient power supply.
Discover featured applications
Improve accuracy in HEV/EV applications with low-power adjustable shunt references
In hybrid, electric and powertrain systems, shunt voltage references ensure feedback loop control and accuracy in system diagnostics. Our shunt voltage references are available in a range of voltage options and package sizes to meet your system requirements without draining power.
Benefits:
- Micropower shunt voltage references in small footprints
- Low output drift vs. temperature ensures stability across temperature ranges
- An adjustable reference pin enables you to set the output voltage as high as 36 V (TL431LI-Q1)
Featured resources
- TIDA-01168 – Bidirectional DC/DC Converter Reference Design for 12-V/48-V Automotive Systems
- TIDA-01505 – Automotive 40-V to 1-kV input flyback reference design supporting regenerative braking test
- TL431LI-Q1 – Automotive, adjustable, precision shunt regulator with optimized reference current
- LM4050-N-Q1 – Automotive, 50-ppm/°C precision micropower shunt voltage reference
- Implementing Voltage References and Supervisors Into Your Traction Inverter Desi – Application note
- Using dual high-current op amps to drive automotive LED lights – Technical article
Achieve high-accuracy voltage regulation in grid applications with shunt voltage references
Available in multiple output and accuracy options to suit your design's needs, our shunt voltage references offer accurate and cost-effective power-management solutions.
Benefits:
- Adjustable voltage options from 2.5 V up to 36 V
- High initial accuracy and low quiescent current
- Cost-competitive and industry-pin-to-pin devices
Featured resources
- PMP7932 – Isolated Flyback Converter for Industrial Bias Supply - Reference Design
- ATL431EVM-001 – ATL431 adjustable shunt regulator evaluation module
- TLV841EVM – TLV841 evaluation module for ultra-low-voltage nanopower supervisor with adjustable release delay
Extend your appliance's performance with precision shunt voltage references
The wide range of package, voltage and accuracy options of our precision shunt voltage references enable reliable power-supply designs.
Benefits:
- Fixed and adjustable shunt reference selection
- 1-mm-by-1-mm package size
- Low quiescent current options for battery-operated applications
Featured resources
- TIDA-00300 – Isolated power architecture reference design for communication and analog input/output modules
- TIDA-01141 – Shunt-Based, <1% Accurate, ±100A, High-Side, Bi-directional Current Measurement Reference Design
- PMP8606 – 300W Full Bridge Phase Shifted (FBPS) DC/DC Power Supply Reference Design
- ATL431EVM-001 – ATL431 adjustable shunt regulator evaluation module
Design in-vehicle infotainment with precision shunt references
In infotainment systems, shunt voltage references in flyback converters handle feedback loop control and precision referencing for internal analog-to-digital converters (ADCs). Adding an external shunt voltage reference for your internal ADC helps maximize your system's error budget.
Benefits:
- Micropower shunt references in small footprints
- Low output drift vs. temperature ensures stability across temperature ranges
- An adjustable reference pin enables you to set the output voltage as high as 36 V (TL431LI-Q1)
Featured resources
- PMP10652 – System-Level Reference Design for 30W ADAS System With Required Automotive Protections
- PMP9780 – Reference Design: Bipolar TFT LCD Supply Using TPS65131-Q1 and Charge Pumps
- TIDA-00746 – 17W System-Level Power Reference Design for Automotive Infotainment Processor Power
- LM4050-N-Q1 – Automotive, 50-ppm/°C precision micropower shunt voltage reference
- TL431LI-Q1 – Automotive, adjustable, precision shunt regulator with optimized reference current
- TLV431A-Q1 – Automotive, low-voltage adjustable precision shunt regulator
- SHUNT_VOLTAGE_REFERENCE_RESISTOR_CALCULATOR – Shunt voltage reference external resistor quick-start calculator