TS831-5IZ

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Supervisors are the essential components used in almost all types of integrated circuits and particular in power management integrated circuits (PMICs) are called PMIC - Supervisors. TS831-5IZ is an example of such IC that is used in power management applications. This application note covers its field of application and the working principle.

Introduction

TS831-5IZ is a member of the tinyTS family of continuous low-dropout linear regulators (LDOs) found in the Texas Instruments Company. This device is particularly preferred for its low current consumption, small footprint and many features. TS831-5IZ comes in a 4-pin SOT-23 package and requires very low minimum input voltage, that is, 1.1V, making it ideal for use in portable equipment requiring lower current.

Application Field

The TS831-5IZ is a versatile power management integrated circuit used for powering down-stream circuits. It is essential in portable electronic devices such as smart phones, tablets and portable multimedia players because of its low power consumption and low minimum input voltage. In addition, this device is useful in many other applications like television receivers, VCRs, digital cameras, automobile electronics, etc. Its programmable undervoltage locks and wide operating range (1.1V to 5.5V) supports different levels of voltage and allows various applications that require precision voltage control.

Working Principle

The main function of the TS831-5IZ is to provide a regulated output voltage from an unregulated input voltage. It operates by combining a series pass transistor with a low-dropout linear regulator. The series pass transistor, which is provided with a basic ON/OFF control, is the core element of this regulator. The ON/OFF control is done between the input voltage and the output voltage for voltage regulation. It controls the amount of current flowing in the series transistor and adjusts the output voltage level.

The adjust pin of the TS831-5IZ allows the output voltage to be adjusted as per the external environment or user requirements. This analog input signal provides the voltage reference value that is then compared with a bandgap reference and is used to adjust the output voltage accordingly. The bandgap reference is a voltage reference circuit employed because it provides very close temperature coefficient (TC) of the output voltage over the full voltage range.

The TS831-5IZ also has an undervoltage lockout (UVLO) circuit that sent a signal to the base of the pass transistor when the input voltage drops to a certain level. This prevents the device from being permanently turned on or off. The UVLO hystersis can also be adjusted using an external resistor.

Conclusion

In conclusion, the TS831-5IZ application is primarily for power management integrated circuits. It is suitable for use in portable electronic devices and in many other types of applications. Moreover, its low current consumption, small footprint, adjustable undervoltage locks and wide operating range support different levels of voltage and allow for precision voltage control. Its working principle consists of a series pass transistor with a low-dropout linear regulator along with a bandgap reference circuit and an undervoltage lockout (UVLO) circuit.

The specific data is subject to PDF, and the above content is for reference