S-1131B37PD-N4WTFG Datasheet/PDFPMIC - Voltage Regulators - Linear
Voltage regulators play an important role in ensuring consistent supply of power to electrical components and circuits. A linear voltage regulator is an integrated circuit (IC) that reduces and maintains a certain constant output voltage whenever the input voltage changes. Linear voltage regulators feature low noise, low drop, and low ripple; they are used in all sort of applications such as telecommunications, industrial control, audio amplifiers, and personal computers.
The S-1131B37PD-N4WTFG voltage regulator is a three-terminal linear regulator specifically designed for USB applications. It works as a flexible voltage source with a constant output voltage of 3.3V or 5V. The device is housed in a small, 8-Lead Mini SOT-23 package and only requires two external capacitors for normal operation. It can be used in many applications where power is supplied through USB ports.
Application Field:
The S-1131B37PD-N4WTFG is designed for USB applications, where it delivers a consistent 3.3V or 5V output voltage. It can be used in a range of products such as mobile phones, cameras, PDAs, and notebooks. Moreover, it can also be used in USB-powered hub circuit boards, set-top boxes, and router devices.
Working Principle:
The S-1131B37PD-N4WTFG operates in two modes: track mode and fixed output mode. In track mode, the output voltage is automatically adjusted to closely match the input voltage. In fixed output mode, the output voltage is set to the preset value regardless of the input voltage. The device contains an internal voltage reference and an error amplifier, along with essential logic circuits, which work together to deliver precise output voltage with excellent temperature stability.
The device features low dropout (LDO) regulation, which keeps the output voltage within the specified range even when the input voltage decreases and is close enough to the output voltage. At the same time, it provides a very low noise output. The device also features a power save mode, which automatically reduces the quiescent current when the load current is low, thereby reducing power consumption and heat dissipation.
Conclusion:
The S-1131B37PD-N4WTFG is a useful and highly efficient voltage regulator. Its low noise and low dropout are ideal for devices that require a consistent output voltage. It is suitable for USB applications such as cellular phones, digital cameras, and tablet PCs. What’s more, its power-saving mode helps to reduce power consumption and increase efficiency.