MIC803-30D3VC3-TR Voltage Supervisor IC – 3.0V Reset Active High SOT-23

MIC803-30D3VC3-TR Voltage Supervisor IC – 3.0V Reset Active High SOT-23 is a critical, highly integrated component that ensures the reliable operation of digital systems by constantly monitoring the power supply voltage. This specific device is programmed for a precise 3.0V trip threshold and outputs an active-high reset signal (RESET) to the host microcontroller or digital circuit. Consequently, when the V_CC voltage dips below the nominal 3.0V threshold (V_TH), the IC immediately asserts the RESET signal, forcing the system into a known state, which prevents data corruption or erratic execution. Furthermore, its small SOT-23 package and low power consumption make the MIC803-30D3VC3-TR an ideal choice for portable, battery-powered equipment and any embedded application demanding high integrity and compact design.

Key Features:

• Fixed Precision Threshold: The IC provides a highly accurate, factory-programmed voltage trip point of 3.0V (±1.5% accuracy at 25°C).
• Active-High Reset Output: Drives the RESET pin high when the supply voltage drops below 3.0V, making it compatible with many standard logic inputs.
• Built-in Reset Delay: Features an integrated 140 ms (min) power-on reset (T_PD) delay time, ensuring stable system initialization after power-up.
• Low Current Consumption: Typically draws less than 3 μA of quiescent current, significantly extending battery life in portable electronics.
• SC-70/SOT-323 Compatibility: Packaged in the ultra-small SOT-23-3 format, therefore, minimizing PCB footprint.

Technical Specifications:

• Monitoring Threshold (V_TH): 3.0 V (Nominal)
• Threshold Accuracy: ±1.5% at +25°C
• Reset Output Type: Push-Pull, Active High (RESET)
• Minimum Reset Timeout Period (T_PD): 140 ms (Ensures stable power-up)
• Supply Voltage Range (V_CC): 1.0 V to 5.5 V
• Quiescent Current (I_Q): Typically 2.5 μA
• Operating Temperature Range: −40°C to +125°C (Automotive/Industrial Grade)

Mechanical Specifications:

• Package Type: SOT-23-3 (Surface Mount Technology)
• Soldering: Suitable for standard reflow soldering profiles.
• Moisture Sensitivity Level (MSL): MSL 1 (Unlimited floor life at ≤30°C/85% RH)

Dimensions:

• Body Length: ≈ 2.9 mm
• Body Width: ≈ 1.3 mm
• Body Height: ≈ 1.0 mm
• Pin Pitch: 0.95 mm
• Footprint: Ultra-compact SOT-23-3 outline.

Pinout and Wiring:

• Pin 1 (V_CC): Connect to the monitored power supply voltage (e.g., 3.3V, 5V).
• Pin 2 (GND): Connect to the circuit ground reference (0V).
• Pin 3 (RESET): Connect directly to the reset input pin of the microcontroller (MCU) or peripheral. This pin goes high when V_CC is below 3.0V.
• Wiring Note: Place a small bypass capacitor (e.g., 0.1 μF) between V_CC and GND near the IC to ensure clean voltage monitoring.

Datasheet Reference:

• Download MIC803 Voltage Supervisor Datasheet

Commonly Used in:

• Portable Devices: Used widely in mobile phones, tablets, and wearable electronics where reliable battery monitoring is essential.
• Microcontroller Systems: Providing mandatory power-on reset and brown-out protection for low-power MCUs (e.g., PIC, MSP430).
• Data Acquisition Equipment: Ensuring the integrity of collected data during power fluctuations.

Applications:

• Power-Up Reset Generation: Guarantees the MCU starts in a known, stable state after power is applied.
• Brown-Out Protection (BOP): Prevents erratic operation when the supply voltage drops transiently below the minimum operating level.
• Battery Monitoring: Signals a low-battery condition in systems where the 3.0V threshold represents a critical low level.

Equivalent Models:

• MAX803 (Maxim Integrated): A functionally identical voltage monitor series with a similar pinout and 3.0V threshold option.
• TLV803 (Texas Instruments): An alternative 3-pin SOT-23 supervisor offering equivalent precision and reset functionality.
• ADM803 (Analog Devices): Another direct competitor with a fixed 3.0V trip point, however, verify the specific reset output polarity before substitution.

Package Includes:

• 1 x MIC803-30D3VC3-TR Voltage Supervisor IC SOT-23