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Product Detailed Parameters
- Description：IC VREF SHUNT 1.4% SOT23-3
- Series：-
- Mfr：Analog Devices Inc./Maxim Integrated
- Package：Tape & Reel (TR)
- Output Type：Fixed
- Voltage - Output (Min/Fixed)：5V
- Voltage - Output (Max)：-
- Current - Output：50 mA
- 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-23-3
- Grade：-
- Qualification：-
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Overview
The MAX6331LUR-T is a precision shunt regulator with an active-high reset output, housed in a 3-pin SOT23-3 package. It regulates the shunt voltage to 5.0V with ±1.5% tolerance and monitors power supply levels against a 4.63V threshold. The device operates over a shunt current range of 100µA to 50mA within a -40°C to +85°C temperature range. It provides a fixed 140ms reset timeout period without external components.
Feature Summary
- Combines a precision shunt regulator with a microprocessor supervisory circuit in a single compact package
- Provides active-high push/pull reset output for reliable logic interfacing
- Ensures system stability through integrated transient immunity and internal timer management
Applications
- Microcontroller-based controllers
- Household appliances
- Intelligent instruments
- Critical microprocessor and microcontroller power monitoring
- Portable or size-sensitive equipment
Procurement Notes
Verify the specific suffix 'L' corresponds to the required 5.0V shunt regulation and 4.63V reset threshold before ordering. Confirm that the active-high RESET polarity matches the target microprocessor interface requirements. Ensure the selected series resistor accommodates the maximum input voltage and load current variations while maintaining the minimum shunt current for stable regulation.
Selection Notes
Select this component when board space is limited and both voltage regulation and power-on reset functionality are required simultaneously. The active-high output is suitable for systems requiring non-inverted reset signals. Evaluate the thermal dissipation capabilities if operating at high shunt currents near the 50mA limit, as die temperature affects voltage tolerances.
Part Context
This part belongs to the MAX6330/MAX6331 family of precision shunt regulators with reset functions. The MAX6331 variant specifically features an active-high reset output, distinguishing it from the MAX6330's active-low counterpart. Both share identical shunt regulation characteristics and package dimensions, allowing for flexible design choices based on logic level requirements.
Replacement Considerations
MAX6330LUR-T: Identical shunt regulator but features an active-low reset output instead of active-high.
FAQ
What is the function of the RESET pin on the MAX6331LUR-T?
The RESET pin provides an active-high push/pull output that remains low while the shunt voltage is below the 4.63V threshold and stays low for 140ms after the voltage rises above the threshold.
How does the bypass capacitor affect the MAX6331LUR-T performance?
The bypass capacitor on the SHUNT pin influences load-transient response; insufficient capacitance may cause oscillation, while excessive capacitance increases recovery time. A minimum of 0.03µF is recommended for stability.
