Maxim MAX6710 IC for Monitoring Supply Voltages
The Maxim MAX6710 IC is designed to monitor four supply voltages effectively. When any of these voltages falls below the threshold voltage specified by the manufacturer, the IC initiates a Reset signal. This signal stays active for 140 ms after all four inputs have risen above the threshold voltage, ensuring a dependable system reset. Notably, the fourth input (IN4) can be customized via an external voltage divider. Its threshold voltage is fixed at 0.62 V. For determining the appropriate values of the voltage divider resistors R1 and R2, a common approach is to select a value for R2 (such as 100 kΩ) and then calculate the value of R1 utilizing the provided formula:
Power Supply and Reset Signal Generation with the IC
This IC draws power from the voltage supplied to IN2, exhibiting an incredibly low current consumption of just 35 μA. Remarkably, a flawless reset signal can be generated with a mere 1 V present at either IN1 or IN2. The IC is conveniently packaged in a compact SOT23 SMD package. Various types of this IC are available, with details provided in the accompanying table.
Manual Reset Signal Option and Input Connection
In situations where generating a reset signal manually is necessary, a straightforward solution exists. By integrating a pushbutton switch in parallel with resistor R2, input IN4 can be easily connected to ground when the button is pressed. This configuration enables the manual operation of the reset signal. To ensure proper functionality, R1 plays a crucial role by limiting the current in this setup.
A small outline transistor (SOT) is a discrete surface mount transistor with a small footprint that is extensively used in consumer electronics. SOT23 versions are the most common, although manufacturers also provide the nearly identical thin tiny outline transistor (TSOT) package, which is useful when height is a concern. The article is going to introduce the differences between the two package.
FEATURES
- Step-Down Controller for Applications With up to 95% Efficiency
- 1.8-V to 6.5-V Operating Input Voltage Range
- Adjustable Output Voltage Range From 1.2 V to VI
- High Efficiency Over a Wide Load Current Range
- 100% Maximum Duty Cycle for Lowest Dropout
- Internal Softstart
- 20-µA Quiescent Current (Typical)
- Overcurrent Protected
- Available in a SOT23 Package
