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LX432ISC
Microchip Technology
IC VREF SHUNT ADJ 1% SOT23
4147 Pcs New Original In Stock
Shunt Voltage Reference IC Adjustable 1.24V 20 VV ±1% 20 mA SOT-23
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5.0 / 5.0
- (190 Ratings)
LX432ISC
Product Overview
656408
DiGi Electronics Part Number
LX432ISC-DGManufacturer
Microchip Technology
LX432ISC
Description
IC VREF SHUNT ADJ 1% SOT23Inventory
4147 Pcs New Original In Stock
Shunt Voltage Reference IC Adjustable 1.24V 20 VV ±1% 20 mA SOT-23
Quantity
Minimum 1
Minimum 1
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LX432ISC Technical Specifications
Category
Power Management (PMIC), Voltage Reference
Packaging
Tube
Series
-
Product Status
Active
Reference Type
Shunt
Output Type
Adjustable
Voltage - Output (Min/Fixed)
1.24V
Voltage - Output (Max)
20 V
Current - Output
20 mA
Tolerance
±1%
Temperature Coefficient
-
Noise - 0.1Hz to 10Hz
-
Noise - 10Hz to 10kHz
-
Voltage - Input
-
Current - Supply
-
Current - Cathode
80 µA
Operating Temperature
-40°C ~ 85°C (TA)
Mounting Type
Surface Mount
Package / Case
TO-236-3, SC-59, SOT-23-3
Supplier Device Package
SOT-23
Base Product Number
LX432
Datasheet & Documents
HTML Datasheet
LX432ISC-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
LX432ISC-DG
150-LX432ISC
Standard Package
3,000
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
Les délais de livraison sont respectés même lors des périodes de forte demande.
December 02, 2025
注文後すぐに発送され、2日後には手元に。安心して買い物ができました。
December 02, 2025
Their dedicated support makes remote work easier and stress-free.
December 02, 2025
DiGi Electronics makes sourcing electronic components stress-free with their vast stock.
December 02, 2025
The user experience on their website is top-notch, ensuring smooth browsing.
December 02, 2025
Every interaction with DiGi Electronics leaves me confident in their dedication to excellence.
December 02, 2025
The shipping was handled smoothly, with fast processing and tracking updates that were accurate.
December 02, 2025
Their consistent delivery times give me peace of mind when planning my projects.
December 02, 2025
Years of use have proven their products’ durability, still functioning like new.
December 02, 2025
Their rapid shipping process keeps my workflow smooth, and their products are built to last.
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Frequently Asked Questions (FAQ)
How does the LX432ISC handle low cathode current in battery-powered applications, and what design risks should I mitigate?
The LX432ISC specifies a minimum cathode current of 80 µA, which is critical for maintaining regulation in low-power systems. In battery-powered designs where current consumption must be minimized, dropping below this threshold can cause poor regulation or thermal instability. To mitigate this risk, ensure the external divider current exceeds 100–150 µA even under minimum load conditions. Consider using high-value resistors with a bypass capacitor at the reference output to reduce power without sacrificing stability. Always verify operation over temperature, as leakage currents in the resistive divider can affect performance near shutdown thresholds.
Can I directly replace the LMV431AIMF/NOPB with the LX432ISC in an existing shunt reference circuit, and what layout adjustments are needed?
Yes, the LX432ISC is a functional pin-to-pin alternative to the LMV431AIMF/NOPB with tighter tolerance (±1%) and similar cathode current requirements. However, verify that your feedback network delivers sufficient cathode current (>80 µA) over all operating conditions, as the LMV431 may have been designed with different margin assumptions. Also, ensure the PCB layout provides adequate thermal relief on the SOT-23 pad to avoid solder joint defects during reflow. No major circuit changes are typically needed, but simulate transients in load regulation to confirm stability in your feedback configuration.
What are the risks of using the LX432ISC near its maximum 20 V input voltage in industrial environments with voltage transients?
While the LX432ISC supports up to 20 V across its terminals, prolonged exposure to voltages near this limit—especially in electrically noisy industrial settings—increases failure risk due to overvoltage spikes or power supply ringing. To protect the device, always include a current-limiting resistor and consider adding a transient voltage suppression (TVS) diode on the anode side if the supply is unregulated or subject to load dumps. Also verify that the maximum power dissipation (dependent on ambient temperature and PCB layout) isn’t exceeded during worst-case scenarios, such as open-load conditions with high input voltage.
How does the adjustable output range of the LX432ISC compare to the AP432SAG-7 in precision analog measurement circuits?
Both the LX432ISC and AP432SAG-7 offer adjustable shunt references with similar voltage ranges (1.24V to 20V) and ±1% tolerance, making them suitable for precision analog applications like sensor signal conditioning. However, the LX432ISC generally exhibits tighter dynamic impedance and better long-term stability based on Microchip's process control, giving it an edge in high-accuracy systems. When replacing the AP432SAG-7, recalibrate resistor ratios in the feedback network to account for minor differences in reference voltage drift and ensure the operating current stays above 100 µA to minimize noise sensitivity in low-level analog measurements.
What PCB layout practices should I follow to ensure thermal stability and long-term reliability of the LX432ISC in high-density SMT designs?
In high-density SMT layouts, the LX432ISC’s thermal performance depends heavily on copper heat spreading. Use at least two vias under the thermal pad (if applicable) or connect the cathode/anode traces to wider copper pours to assist heat dissipation. Avoid placing the device near high-power components or thermal gradients that could affect its temperature coefficient. Given its 85°C maximum operating temperature, ensure free airflow or conformal coating if operating in harsh environments. Also, adhere to MSL-1 handling—even with unlimited floor life, store in dry conditions to prevent contamination that could degrade performance over time.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
LX432ISC CAD Models
Microchip Technology LX432ISC PCB symbols & footprints
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