DS1232LPS-2

PMIC - Supervisors: DS1232LPS-2 Application Field and Working Principle

A supervisor has a significant role in system design. It monitors the supply voltage of the system, resets and recovers the system after the power on, and detects short circuits and excessive current at the power supply of the system. Pericom Semiconductor\'s DS1232LPS-2 is an advanced supervisor IC featuring a 5-in-1 operation system, and it is capable of monitoring and controlling the status of a system. This article will examine the application fields of the device, as well as its working principle.

Application field of the DS1232LPS-2

The DS1232LPS-2 is mainly applied in embedded systems, especially in the voltage monitoring of embedded system. It performs two functions: power on and off, and reset. The two functions ensure that the system can start up properly after a power on and arrange a reset mechanism, ensuring that the system can be reset according to the situation and recover properly.

The DS1232LPS-2 is mainly applied in single-chip embedded systems of various types, such as single-chip computers, industrial control systems, instrumentation systems, etc. It is suitable for embedded systems based on Cortex family, Ricoh family, ATmega168/Mega8 series, STM32 microcontroller, etc. It can replace the now obsolete MC14033 devices, yet offer a complete set of functions in a single package.

Working principle of the DS1232LPS-2

The core circuit of the the DS1232LPS-2 consists of a built-in power-on reset (POR) circuit, a system reset (SR) circuit, a low voltage reset (LVR) circuit, an unrestricted power-on reset (UVR) circuit, and an overload protection (OLP) circuit. The POR circuit provides power-on reset and reset recovery, and it helps detect power-on in a timely manner and initiate a reset process. The SR circuit helps reset the system when needed, or restart the system after a power-on. The LVR circuit helps detect low voltage in a timely manner and make a reset when needed, thus protecting the system from voltage instability and protecting the power level of the system. The UVR circuit helps detect the status of a undervoltage in a timely manner in order to protect data from being corrupted. Lastly, the OLP circuit helps detect abnormal currents flowing in the system and make a reset whenever a current overload is detected.

In addition to the primary functions, the DS1232LPS-2 offers a range of useful features. It has a built-in bandgap voltage reference allowing for precise power supply voltage monitoring, with an accuracy of ±1.0%. Its quiescent current is very low, resulting in minimal power consumption. It also has excellent operating temperature ranges, with a temperature coefficient of ±2%/°C at a reference voltage of 2.5V, and a temperature range of -40°C to +85°C. Finally, it has a long reset noise immunity to ensure correct reset operation in noisy conditions.

Conclusion

The DS1232LPS-2 is an advanced supervisor IC, which offers a full range of features to ensure stable and reliable operation of a system. It can be used in a wide range of embedded systems, be it for single-chip computers, industrial control systems, instrumentation systems, etc. Its working principle is based on five circuits, namely the power-on reset circuit, system reset circuit, low voltage reset circuit, unrestricted power-on reset circuit, and overload protection circuit. The device also offers various features that enhance its performance, such as a low quiescent current, a precise bandgap voltage reference, and a long reset noise immunity.