LM3702YCBP-220

Power management integrated circuits (PMICs) are among the most common integrated circuits used today. They are essential components for power conversion, management, and control in many applications, from small appliances to large industrial systems. They offer solutions to manage the flow or power, reduce consumption, and control voltage, current and temperature.

Within the PMIC family, supervisors are special-purpose devices used to monitor and control system power, typically for automotive, industrial, and medical applications. They are used to ensure that the power supply remains within an expected range, and to enable system protection from short circuits or current and voltage fluctuations. In addition to providing protection, some supervisors can also provide an indication of power supply status.

LM3702YCBP-220 is a Supervisor IC and belongs to the popular LM3702Y family of Supervisors. It is a highly-integrated PMIC, typically used in portable electronic devices and other battery powered applications. This product is the smallest member of the LM3702Y family and provides accurate monitoring, low voltage, and power-on-reset functions all in a small 1.8mm x 1.6mm footprint. The device features a variety of features, such as power-up/down delay and undervoltage/overvoltage protection.

Applications

The LM3702YCBP-220 is suitable for use in a wide variety of applications, including:

• Battery-powered devices, such as medical and other handheld equipment
• Industrial/automotive/consumer systems
• Cameras/image sensors/mobiles
• Graphics accelerators/microcontrollers/memory devices
• Multi-rail power applications
• Telecom infrastructure/laptop/tablet computers

Working Principle

The LM3702YCBP-220 is capable of monitoring multiple voltage rails, and offers precision monitoring of power-on/off, under-voltage and over-voltage conditions. The device senses and latches the voltage of user-specified levels, and then actuates an integrated voltage switch that allows the device to disconnect the system load. In addition, the product features a low-voltage reset to ensure reliable system startup.

The LM3702YCBP-220 employs an amplifier circuit to monitor the power rail. The amplifier compares the power rail voltage to an internal reference voltage, and when the power rail voltage falls below or rises above a user-specified threshold, the device sends a signal to the voltage switch and causes the load to disconnect. The device is also equipped with standby logic, which allows the device to be placed in a low-power state to reduce power consumption during idle periods.

The LM3702YCBP-220 is programmable via an I2C interface, which allows the user to adjust the device’s parameters, including voltage thresholds for power-on/off, under-voltage and over-voltage conditions, reset window width, and output voltage. This feature makes the device suitable for use in a variety of applications and allows for system optimization and customization.

In short, the LM3702YCBP-220 is a highly integrated, programmable supervisor IC which offers a variety of features, including power-on/off, under-voltage and over-voltage protections, low-voltage reset and I2C programming, making it an ideal solution for a variety of applications.