DS1238S-5+T&R

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Power management IC, or PMIC, is an integrated circuit that acts as a power regulator and supervisor, providing the necessary power and control signals to electronic elements in a system. With the development of modern technology, PMICs have progressed to include sophisticated voltage regulation, logic, and other advanced functions leading to their wide use in all types of automotive, industrial, and consumer electronics. PMICs provide regulated system power from a variety of sources, such as batteries, AC/DC adapters, and solar cells, as well as energy harvesting applications. Supervisors, often referred to as reset ICs, are one type of PMIC for monitoring system conditions such as power-on reset and brown-out detection, as well as providing protection for voltage output and over-temperature protection. One such supervisor is the DS1238S-5+T&R family, which combines both power-on reset and brown-out detection in a 5-pin SOT-23 package.

DS1238S-5+T&R: Features and Benefits

The DS1238S-5+T&R family provides many features and benefits, including:

• Low dropout 150mA (typical) power regulator with overcurrent protection
• On-chip LDO regulator
• Low-power consumption (down to 0.2uA)
• Accurate reset detection (2.1V typical) with power-on reset and brown-out detection
• Output voltage range from 1.71V to 5.5V
• Integrated thermal shutdown feature
• Small 5 pin SOT-23 package

In addition, the DS1238S-5+T&R offers flexible input protection features such as overvoltage protection, load dump protection, and reverse connection protection.

DS1238S-5+T&R Application Fields and Working Principle

PMICs such as the DS1238S-5+T&R are used in a wide range of applications, typically to supply and maintain a regulated output voltage or current, monitor system status and/or reset the system when certain conditions are met. Supervisors like the DS1238S-5+T&R are designed to provide system voltage monitoring via its Power-On Reset (POR) and Brown-Out Reset (BOR) functions.

The DS1238S-5+T&R includes an on-chip CMOS voltage regulator (LDO) with an output voltage range of 1.71V to 5.5V, making it suitable for a wide range of consumer, automotive, and industrial applications. The LDO can be used in parallel with an external voltage source, or can be used as an independent power regulator. The DS1238S-5+T&R also includes an adjustable threshold POR and BOR that can detect when the output voltage drops to an unsafe level, in which case the device will automatically reset the system to ensure reliable operation.

The DS1238S-5+T&R also offers a flexible input protection feature that prevents damage from load dumps, overvoltage conditions, and reverse connection. It also provides thermal shutdown protection to prevent system malfunction due to high temperatures. The DS1238S-5+T&R is designed to provide a reliable, cost-effective solution for power monitoring and resetting applications.

Conclusion

The DS1238S-5+T&R family of PMIC supervisors is designed to provide accurate reset detection and power monitoring for system applications, particularly in automotive, consumer, and industrial applications. Its low power consumption, integrated LDO, and protection features make it an ideal choice for a wide range of applications. Its small package size, excellent performance, and cost-effectiveness make it a popular choice for developers looking for a reliable solution.

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