S-1142DC5I-E6T1U

Current - Output:	200mA
Supplier Device Package:	6-HSOP
Package / Case:	6-SOIC Variation (0.154", 3.9mm Width), 4 Leads + 2 Fins
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Protection Features:	Over Current, Thermal Shutdown
Control Features:	Enable
PSRR:	30dB (100Hz)
Current - Supply (Max):	9µA
Current - Quiescent (Iq):	1µA
Series:	S-1142C/D
Voltage Dropout (Max):	0.4V @ 200mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	12.5V
Voltage - Input (Max):	50V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The S-1142DC5I-E6T1U is a Linear Voltage Regulator that is part of a family of PMICs suitable for a variety of low-voltage applications. The S-1142DC5I-E6T1U offers excellent line and load regulation, low dropout voltage and high accuracy. The high accuracy and low power dissipation make it ideal for low power applications such as medical and battery powered devices.

Application Field

The S-1142DC5I-E6T1U is intended for use in high-side current sources and voltage regulators. It provides accurate line and load regulation with a low power dissipation. It is suitable for many industrial, automotive and medical applications where a low dropout voltage, high output voltage accuracy and fast transient response are needed.The S-1142DC5I-E6T1U is also suitable for use in electronic control systems that require precise voltage regulation, such as motor driver circuits, LCD/LED displays and automotive DC/DC converters. Additionally, this linear voltage regulator can be used to reduce current ripple in battery-powered devices, low voltage audio amplifiers and other low voltage applications.

Working Principle

The S-1142DC5I-E6T1U is a linear voltage regulator that utilizes an active Zener device (an electronic component that utilizes a reverse biased P-N junction to establish a specific voltage level) with a current limiting element to provide an output voltage that is dependent on the series resistor value.In basic operation, the S-1142DC5I-E6T1U is connected to a low-impedance input voltage source and loaded by an output resistor connected to an output load. When the output current reaches the controller\'s current limit, the regulator pulls the base voltage down. This causes the voltage between the collector and the base of the active Zener to drop, and thus reducing the voltage at the output load. The controller maintains the specified output voltage by controlling the base voltage of the active zener. As the output voltage increases, the controller senses the voltage increase and subsequently decreases the base voltage of the active zener, which in turn decreases the voltage across the collector and base of the active zener. This active control loop maintains a precise voltage at the output load, even if the input voltage varies. In addition, the device features a fast transient response and is capable of operating over an input voltage range of 5V - 22V.

Conclusion

The S-1142DC5I-E6T1U is an ideal Linear Voltage Regulator for a variety of low voltage applications, thanks to its high accuracy, low power dissipation and efficient control loop. It is suitable for use in high-side current sources and voltage regulators, as well as for motor driver circuits, LCD/LED displays, medical equipment and other low voltage applications. The S-1142DC5I-E6T1U uses an active Zener device with a series resistor, a current limiting element, and a control loop to regulate and maintain precise output voltages.

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