UCC2946TPWRQ1

Series:	Automotive, AEC-Q100
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Push-Pull, Totem Pole
Reset:	Active Low
Reset Timeout:	140 ms Minimum
Voltage - Threshold:	Adjustable/Selectable
Operating Temperature:	-40°C ~ 105°C (TA)
Mounting Type:	Surface Mount
Package / Case:	8-TSSOP (0.173", 4.40mm Width)
Supplier Device Package:	8-TSSOP
Base Part Number:	UCC2946

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PMIC - Supervisors

PMIC is short for Power Management Integrated Circuits, which are widely used in a variety of applications in electronic devices to maintain optimum power efficiency. PMIC can be divided into several categories, among which Supervisors is one of the most widely used ones. Supervisors are designed to monitor signals, voltages, and current during applications in order to prevent system failures due to unexpected external or internal conditions.The UCC2946TPWRQ1 from Texas Instruments is a one-of-its-kind supervisory integrated circuit designed for anyone engaged in developing a power supply. This highly versatile supervisor is optimized for higher power operating conditions and provides a complete solution for power on/off. It uses a single IC to monitor power up and power down sequences and provides fault protection from latch-up, ESD, surge, RF noise and other fault conditions.

Application Fields

The UCC2946TPWRQ1 is primarily used in power supplies and voltage regulator systems. It is suitable for a wide range of application fields such as computers, cellphones, medical equipment, industrial equipment, automotive applications and many others.

Features

The UCC2946TPWRQ1 integrates a few major features that make it unique among other supervisors. It has an adjustable digital timer to accurately control the on- and off-times. The integrated digital timer is programmable through the voltage applied on its RES pin to adjust the on time and off time. With its low power consumption, the UCC2946TPWRQ1 is capable of operating with power supply voltages ranging from 2.5 V to 5.5 V. The high-level sensing also helps to maintain a low output voltage during inrush current.

Working Principle

The UCC2946TPWRQ1 has two operating modes, sequential and concurrent. In sequential mode, the Power-On-signal (P-ON) is supplied at the rising edge of the RESET pin. In this mode, P-ON stays low until the RESET pin is released at the rising edge of P-ON. This will start the Power-On Sequence, consisting of the digital timer and the FET output stage. The digital timer initiates the Power-On Sequence for a pre-determined time and then sends the signal to the FET output stage. This initiates the power up of the voltage regulator.In concurrent mode, the P-ON and RESET pins are driven in parallel and the internal window comparator is used to detect the threshold conditions. The internal digital timer is then used to control the outputs based on the voltage threshold values. The UCC2946TPWRQ1 also offers integrated surge protection and other fault protection circuitry in order to protect the system against damage due to unexpected external or internal conditions.

Conclusion

The UCC2946TPWRQ1 is a high performance supervisory integrated circuit. Its dual mode operation, wide Vin range, low power consumption, adjustable timer and fault protection features make it ideal for high-reliability applications in a wide range of electronic devices. Utilizing the UCC2946TPWRQ1 in an application ensures reliable power supply control and maximum safety in the times of power on/off operations.

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