TL7757CPK

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Open Drain or Open Collector
Reset:	Active Low
Reset Timeout:	5 µs Maximum Propagation Delay
Voltage - Threshold:	4.55V
Operating Temperature:	0°C ~ 70°C (TA)
Mounting Type:	Surface Mount
Package / Case:	TO-243AA
Supplier Device Package:	SOT-89-3
Base Part Number:	TL7757

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TL7757CPK Application Field and Working Principle

TL7757CPK is a power management integrated circuit (PMIC) that is part of the family of supervisors, which are used to monitor voltage levels to protect the system from unexpected or catastrophic situations such as over-voltage, under-voltage, power surges, and inrush current. Generally, supervisors combine a voltage monitoring device, a reset device, and a timer device to allow for adjustment of voltages and current levels during start-up or shutdown.Supervisors are used in a variety of applications, from personal computers and industrial automation systems to power supplies and automotive systems. TL7757CPK is designed for 3V to 4.6V power supplies and is available in both 8-pin SOIC and 8-pin SOT23 packages. It has a wide range of features including adjustable threshold levels, active-high or active-low reset signal, internal filter, hysteresis, and output disable.TL7757CPK’s features make it particularly useful in applications such as power-on reset (POR) generators, under-voltage lockout (UVLO) generators, microprocessor reset generators, and battery-backed power systems. It can also be used to sequence and monitor multiple power supplies. tl7757cpk includes two comparators, two resistors and an open-drain reset output. There is also a filter, a timer circuit and an output enable circuit. The filter removes high frequency noise from the input voltage, allowing for a more consistent voltage detection. The timer circuit delays the reset output until the input voltage stabilizes. It also has an enable pin, which allows the reset signal to be disabled during start-up or shut-down.TL7757CPK’s voltage detection is adjustable using the two resistors in the circuit, one resistor sets the high threshold, and the other sets the low threshold. These thresholds are used to determine when the device will activate the reset signal. A hysteresis setting is also available, which determines how much the input voltage must change before the reset signal is deactivated.The TL7757CPK also has an output enable circuit, which allows the reset signal to be controlled externally. This is useful in applications where the device needs to be disabled during start-up or shutdown.In summary, TL7757CPK is a high-performance power management integrated circuit designed for a variety of applications. It provides adjustable threshold levels, hysteresis, and active-high or active-low reset signals. It also includes a filter, timer circuit, and output enable circuit, making it suitable for applications such as power-on reset generators, under-voltage lockout generators, microprocessor reset generators, and battery-backed power systems.

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