S-1335F28-A4T2U3

Current - Output:	150mA
Supplier Device Package:	HSNT-4-B
Package / Case:	4-SMD, Flat Lead Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Protection Features:	Overcurrent, Soft-Start
Control Features:	Enable
PSRR:	80dB ~ 65dB (1kHz ~ 10kHz)
Current - Supply (Max):	54µA
Current - Quiescent (Iq):	1µA
Series:	S-1335
Voltage Dropout (Max):	0.103V @ 100mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.8V
Voltage - Input (Max):	5.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The S-1335F28-A4T2U3 is a high-performance and highly adjustable voltage regulator from Intersil Corporation. It offers a low noise, low dropout voltage, and fast transient response for a wide range of regulated voltages. As a linear voltage regulator, it requires a high input voltage to produce a regulated output and keeps the output voltage stable with low output ripple. This article will discuss the application field and working principle of S-1335F28-A4T2U3.

Application Field

The S-1335F28-A4T2U3 is designed primarily for low noise, low dropout voltage, and fast transient response capability, making it suitable for a variety of applications. It can be used in PC motherboards and other microprocessors, audio and alarm systems, memory controllers, optical drives, microcontrollers and many other applications that may require high current and large voltage dropouts. Its wide input voltage range and fast transient response make it particularly suitable for low power applications that require sudden, large changes in input or output voltage. Additionally, the regulator is also applicable to battery-powered applications as it minimizes losses in the converter system.

Working Principle

The S-1335F28-A4T2U3 is a linear voltage regulator, which utilizes a series pass transistor to maintain a constant output voltage. The differences between linear regulators and switching regulators are important to understand, as the two architectures provide very different features. Linear regulators work by dissipating power in the form of heat. When the input voltage is higher than the output voltage, a series pass transistor is used to control the current from the input power source so as to effectively drop the excess voltage, producing the desired output voltage. The series pass transistor prevents excess current from flowing into the output, providing electrical isolation between the power source and the load.The S-1335F28-A4T2U3 provides a regulated output voltage with a low input-to-output voltage drop, low output noise, and fast response to transient changes in load or input voltage. The regulator can be programmed to produce output voltages from 0.5 V to 28 V, with a maximum output current of 3.0 A. Additionally, it provides over-temperature, current limit, reverse current, and foldback protection possibilites.

Conclusion

The S-1335F28-A4T2U3 is a linear voltage regulator from Intersil Corporation, offering a low noise, low dropout voltage, and fast transient response. With its wide input voltage range and fast response time, it is well suited for a wide range of applications requiring a regulated voltage from 0.5 V to 28 V. The S-1335F28-A4T2U3 works by utilizing a series pass transistor to maintain a constant output voltage, providing over-temperature, current limit, reverse current, and foldback protection possibilites.

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