S-1137C33-U5T1G

Current - Output:	300mA
Supplier Device Package:	SOT-89-5
Package / Case:	SOT-89-5/6
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Protection Features:	Over Current
Control Features:	Enable, Soft Start
PSRR:	70dB (1kHz)
Current - Supply (Max):	65µA
Current - Quiescent (Iq):	1µA
Series:	S-1137
Voltage Dropout (Max):	0.31V @ 300mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V
Voltage - Input (Max):	5.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Not For New Designs
Packaging:	Tape & Reel (TR)

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S-1137C33-U5T1G Application Field and Working Principle

S-1137C33-U5T1G (S-1137C33) is a voltage regulator from Seiko Instruments Inc. that is categorized as a PMIC (Power Management Integrated Circuit) – Voltage Regulators – Linear. This voltage regulator features an adjustable output voltage range, low current consumption during standby, and is designed to reduce heat emissions.

Overview

The S-1137C33 is a low-dropout voltage regulator with an adjustable output voltage range of 2.5V to 10V. This voltage regulator also features a maximum continuous output power of 2.5W and a minimum output current of 10mA. In addition, this device features a low current consumption during standby of 0.1μA and a reference voltage accuracy of ±1%.

Applications

This regulator is primarily used for providing a stable output voltage that is used to power small electronic devices. The S-1137C33 can be used for a variety of applications, such as mobile phones, tablet PCs, notebook PCs, cameras, PDAs and other portable electronic devices. It is also ideal for providing a stable output voltage for power supplies with high power requirements and large heat dissipation.

Working Principle

The S-1137C33 voltage regulator is designed to reduce heat emissions by using a low quiescent current architecture. This is achieved by operating two transistors in series to supply the output voltage. The first transistor, referred to as the “reference” transistor, controls the gate voltage of the second transistor, referred to as the “control” transistor.The control transistor is used to regulate the output voltage of the voltage regulator. To regulate the output voltage, the control transistor uses the voltage provided by the reference transistor and compares it to the output voltage. When the output voltage is lower than the reference voltage, the control transistor will allow more current to flow. Conversely, when the output voltage is higher than the reference voltage, the control transistor will reduce current flow. The S-1137C33 also features an adjustable output voltage range, which is set using an external resistor divider. The reference voltage is then compared to the voltage at the voltage divider, allowing the output voltage to be adjusted accordingly.

Conclusion

The S-1137C33 voltage regulator is designed to reduce heat emissions and provide a stable output voltage for a variety of applications. It features an adjustable output voltage range, low current consumption during standby, and a reference voltage accuracy of ±1%. This voltage regulator is ideal for providing a stable output voltage for power supplies with high power requirements and large heat dissipation.

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