S-1333A29-A4T2U3 Integrated Circuits (ICs)

Introduction

S-1333A29-A4T2U3 is a member of the S-type family of linear voltage regulators from STMicroelectronics. It is used to deliver a precise voltage to circuits and systems that require a stable power source with low drop-out (LDO) characteristics. The device features a low quiescent current and a low voltage drop, making it a preferable choice when battery run-time is a priority. It is typically used in computer systems, consumer electronic devices, and automotive applications.

Application Field

The S-1333A29-A4T2U3 voltage regulator is primarily intended for applications requiring stability and accuracy. Its wide voltage output range of 1.2V to 16V, with up to 0.5-percent accuracy makes it suitable for applications such as PC/workstation/server supplies, car navigation systems, Global Positioning Systems (GPS), portable audio/video systems, and communication equipment such as radio base stations and modems.

The regulator\'s wide tolerance to voltage variation make it ideal for automotive applications. With up to 0.5 percent accuracy, the device provides reliable power in high-voltage variation usage profiles such as cold-crank conditions and spiked input on mobile phones. Its high power density also makes it a preferable choice for battery operated portable devices, as it efficiently translates input power into the desired output.

Working principle

The S-1333A29-A4T2U3 is a classic example of an LDO linear voltage regulator. The device operates as a simple on/off switch that allows or blocks a current in response to an output voltage feedback. If the voltage is below the desired level, the device turns on, allowing current to flow, while if the voltage is above level, the device will turn off, blocking the current in the process.

To achieve the desired results, the device requires two external components - a capacitor and a resistor. The capacitor is used to stabilize the input voltage, while the resistor is used to set the operating current. The device can operate in temperature range from -40°C to 85°C and is protected against over-temperature, over-current, and over-voltage conditions.

In addition, the S-1333A29-A4T2U3 has two output protection features - current limit and short circuit protection. The current limit allows the device to remain within the specified operating current range, while the short circuit protection prevents any external short circuit and provides additional protection in case of a fault.

Conclusion

The S-1333A29-A4T2U3 from STMicroelectronics is perfect for applications where a precise and stable voltage is required. Its wide output voltage range, high accuracy, low voltage drop, and current limit and short circuit protection features make it an ideal choice for a wide range of applications. It is particularly suitable for computer systems, consumer electronics, automotive and power supply systems.