Current - Output:	300mA
Supplier Device Package:	SOT-89-3
Package / Case:	TO-243AA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Protection Features:	Over Current
Control Features:	Enable
PSRR:	70dB (1kHz)
Current - Supply (Max):	65µA
Current - Quiescent (Iq):	1µA
Series:	S-1131
Voltage Dropout (Max):	0.34V @ 100mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.1V
Voltage - Input (Max):	6.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Not For New Designs
Packaging:	Tape & Reel (TR)

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Introduction

S-1131B31UA-N4QTFG is a voltage regulator in the PMIC - Voltage Regulators - Linear field. This series of linear voltage regulator is manufactured by Renesas Electronics. It is a low output, three-terminal negative adjustable regulator that operates to –0.3V at 800mA. The S-1131B31UA-N4QTFG offers TTL shutdown capability, 600 mV dropout, and up to 800mA output current capability.

Application Field

The S-1131B31UA-N4QTFG voltage regulator is suitable for a wide range of applications. Due to its low output, adjustable, and high output current, it is especially suitable for use in personal digital assistants (PDAs), television set-top boxes, televisions, entertainment systems, digital video recorders, computers, and other digital devices.The S-1131B31UA-N4QTFG can also be used in battery-powered and portable applications.

Working Principle

The S-1131B31UA-N4QTFG voltage regulator works on the principle of negative linear regulation. It is a three-terminal adjustable regulator. It works by using a control voltage/logic signal which is fed in as an input to the regulator. The control voltage/signal input is compared to an internal reference with the same voltage value. The difference between the two voltages is called voltage difference. When the voltage difference is too great, the regulator adjusts the output voltage to maintain the desired output voltage.When the control voltage/signal input is below the reference voltage, the output voltage is increased and the output voltage is decreased when the input is above the reference voltage. The S-1131B31UA-N4QTFG has the capability to adjust its output voltage down to an average of -0.3V at a maximum current of 800mA.The S-1131B31UA-N4QTFG also has TTL shutdown capability which enables it to be turned off and on by a logic signal. The TTL logic is a ‘1’ (high) to turn the regulator on, and a ‘0’ (low) to turn it off.

Conclusion

S-1131B31UA-N4QTFG voltage regulator is a part of PMIC - Voltage Regulators - Linear. It offers adjustable, low output, and high current output with a dropout voltage of 600 mV. It also has TTL shutdown capability which can be used to turn the voltage regulator on and off by using a logic signal. The regulator is suitable for use in battery-powered and portable applications and is suitable for a wide range of applications including personal digital assistants (PDAs), television set-top boxes, televisions, entertainment systems, digital video recorders, computers, and other digital devices.

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