S-T111B48MC-OHHTFU

Current - Output:	150mA
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Protection Features:	Over Current
Control Features:	Enable
PSRR:	80dB (1kHz)
Current - Supply (Max):	90µA
Current - Quiescent (Iq):	1µA
Series:	S-T111
Voltage Dropout (Max):	0.26V @ 100mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	4.8V
Voltage - Input (Max):	6.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The S-T111B48MC-OHHTFU is a Linear Integrated Voltage Regulator from STMicroelectronics that delivers a maximum output current of 300mA and an output voltage of 1.8V. This Linear Voltage Regulator is used for many different applications and is designed to provide a stable power supply for a wide variety of applications, including microcontrollers, DSPs, FPGAs and other digital applications.The S-T111B48MC-OHHTFU is well suited for DC-DC power conversion in portable devices. It features excellent line and load regulation, a minimum output current of 300mA, over-current and short-circuit protection, thermal shutdown and adjustable ripple rejection.The S-T111B48MC-OHHTFU is available in two versions; one with an adjustable output voltage and the other with a fixed output voltage of 1.8V.

Application Field

As a Linear Voltage Regulator, the S-T111B48MC-OHHTFU is suitable for many low-power applications, such as microcontrollers, DSPs, FPGAs , and other digital applications. It features a 300mA minimum load current, well suited for DC-DC power conversion in portable devices, such as cell phones, mp3 players, and digital cameras.Additionally, its low dropout voltage makes it suitable for applications with very low voltage supplies, such as battery operated systems. The S-T111B48MC-OHHTFU is also well suited for use in Automotive electronics.

Working Principle

The S-T111B48MC-OHHTFU is a Linear Voltage Regulator that provides regulated output voltage from an unregulated input voltage. The primary function of the regulator is to maintain the output voltage at a constant value. The regulation is achieved by controlling the amount of current drawn from the output.The S-T111B48MC-OHHTFU is designed to use a 2-stage voltage regulator control architecture. The first stage is the input stage, which follows the input voltage and controls the output voltage. The second stage consists of the feedback loop, which controls the current drawn from the output by adjusting the amount of feedback voltage, depending on the difference between the desired and the actual output voltage, thus maintaining the output voltage at a constant level.

Conclusion

The S-T111B48MC-OHHTFU is a Linear Voltage Regulator from STMicroelectronics. It is well suited for many different applications, including microcontrollers, DSPs, FPGAs and other digital applications. Its excellent line and load regulation, along with low dropout voltage and adjustable ripple rejection make it an ideal choice for low-power applications. Additionally, its 2-stage voltage regulator control architecture makes it suitable for a wide range of applications with varying supply conditions.

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