MAX6791TPLD2+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Low-power, high-accuracy, adjustable threshold voltage
• Package: Thin, small-outline package (TDFN)
• Essence: Monitors and controls the voltage level of a system
• Packaging/Quantity: Tape and reel packaging, 3000 units per reel

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Threshold Voltage Options: Adjustable from 0.4V to 5V in 100mV steps
• Quiescent Current: 3µA (typical)
• Operating Temperature Range: -40°C to +125°C
• Output Type: Active-low, push-pull or open-drain
• Reset Timeout Period: Adjustable from 1ms to 640ms in 32ms steps

Detailed Pin Configuration

The MAX6791TPLD2+T has a total of six pins:

1. GND: Ground connection
2. RESET: Active-low reset output
3. MR: Manual reset input
4. TH: Threshold voltage selection input
5. VCC: Positive supply voltage
6. NC: No connection

Functional Features

• Voltage Monitoring: The MAX6791TPLD2+T continuously monitors the supply voltage and asserts the reset signal when it falls below the programmed threshold.
• Adjustable Threshold Voltage: The threshold voltage can be easily adjusted using an external resistor divider network connected to the TH pin.
• Manual Reset Input: The MR pin allows for manual resetting of the device, overriding the automatic reset function.
• Reset Timeout Period: The reset signal remains asserted for a programmable timeout period after the supply voltage rises above the threshold.

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows for compatibility with various systems. - Adjustable threshold voltage provides flexibility in monitoring different voltage levels. - Low quiescent current minimizes power consumption. - Small package size enables space-saving designs.

Disadvantages: - Limited reset timeout period options may not suit all applications. - Lack of built-in hysteresis may result in potential oscillations near the threshold voltage.

Working Principles

The MAX6791TPLD2+T operates by comparing the supply voltage with the programmed threshold voltage. When the supply voltage drops below the threshold, the reset output is asserted, indicating a fault condition. The reset signal remains active until the supply voltage rises above the threshold and the reset timeout period elapses. The device also includes a manual reset input for immediate system reset when required.

Detailed Application Field Plans

The MAX6791TPLD2+T finds applications in various fields, including:

1. Power Management: Ensuring proper voltage levels in battery-powered devices, preventing damage due to undervoltage conditions.
2. Industrial Control Systems: Monitoring critical voltages in control systems to prevent malfunctions or accidents.
3. Automotive Electronics: Protecting sensitive electronic components from voltage fluctuations in automotive applications.
4. Medical Devices: Ensuring reliable operation of medical equipment by monitoring power supply integrity.
5. Consumer Electronics: Safeguarding electronic devices from voltage-related issues, enhancing overall reliability.

Detailed and Complete Alternative Models

1. MAX6790TPLD2+T: Similar to MAX6791TPLD2+T but with fixed threshold voltage options.
2. MAX6792TPLD2+T: Higher accuracy version with additional features such as power-on reset delay and watchdog timer.
3. MAX6793TPLD2+T: Dual-voltage supervisor with independent threshold voltage settings for two supplies.

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