STM819LDS6E

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The STMicroelectronics STM819LDS6E is a low power, voltage detector and supervisor component, classified as a member of their Protection & controller Family of integrated circuits. The component is used for monitoring the supply voltage or voltages of system components, detecting faults such as under or over-voltage conditions and providing protective shutdown functions. The STM819LDS6E is designed to be used in Portable systems, medical and hand-held devices, automotive and home automation applications.

Overview

The STM819LDS6E is available in an 8-pin LFCSP (lead-less chip-scale package). The component is an ultra-low-power voltage detector and supervisor, with a wide supply voltage range that is suitable for many automotive, industrial, and consumer applications. It features both manual reset and power-on reset inputs and offers adjustable low and high thresholds for both reset and fault conditions. The STM819LDS6E also features an adjustable delay time for fault and reset, allowing flexibility to the system design, and an undervoltage lockout (UVLO) to protect sensitive systems from out-of-spec supply voltages.

Features & benefits of STM819LDS6E

Some of the features and benefits of the STM819LDS6E are:

• Wide supply voltage range:1.6-5.5V (6V absolute maximum)
• Precision voltage tracking of 0.1V
• Low power consumption: 5µW typical
• Accurate fault detection: Undervoltage (UV) and Overvoltage (OV) fault thresholds
• Manual reset and Power-on reset capabilities
• Independent low and high reset thresholds
• Delay time for reset and fault allows for flexibility
• Undervoltage lockout (UVLO) protects sensitive systems from out-of-spec supply voltages

Applications of STM819LDS6E

The STM819LDS6E is useful in a variety of portable system, medical, hand-held device, automotive, and home automation applications that require monitoring, detecting and/or protecting supply voltages or system components.

• Consumer Electronics: Including digital cameras, media players, portable gaming systems, and other portable electronics.
• Medical Devices: Such as heart rate and ECG monitors, infusion pumps, and other medical devices.
• Industrial Controls: Such as process controllers, circuit breakers, safety controllers, and other industrial automation applications.
• Automotive Applications: Such as voltage and temperature monitoring, engine control, and other automotive systems.

Working Principle

The STM819LDS6E uses a voltage reference voltage source along with a dual comparator circuit to detect the presence of an undervoltage or overvoltage condition. The comparator takes in the input supply voltage and the reference source voltage, and compares them against one another. If the input voltage exceeds or drops below the predetermined threshold, an alarm signal is generated.

The STM819LDS6E also features power-on-reset (POR) and manual-reset (MR) logic. When POR is enabled, the reset signal is generated when the voltage level exceeds or drops below the predetermined threshold. Manual-reset is manually activated by signals provided from the external application. It is useful in situations where a manual reset may be necessary e.g. to restart a certain module or process.

The STM819LDS6E also features a UVLO circuit to prevent operation of the circuit outside of its designated operating voltage range. When the supply voltage falls below the UVLO threshold, the device automatically shuts off until the voltage is restored to its normal range.

Conclusion

The STM819LDS6E is a low power, voltage detector and supervisor integrated device, which is suitable for a broad range of automotive, industrial, and consumer applications. It features wide supply voltage range, precision voltage tracking of 0.1V, undervoltage (UV) and Overvoltage (OV) fault thresholds and manual reset and Power-on reset capabilities. The STM819LDS6E can be used in a wide range of applications in consumer electronics, medical devices, industrial controls, and automotive applications. It is an excellent choice for a wide range of protective and monitoring functions that require low power and precision.

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