S-85S1PC33-I8T1U

Voltage - Input (Max):	5.5V
Supplier Device Package:	SNT-8A
Package / Case:	8-SMD, Flat Lead
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	1MHz
Current - Output:	200mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V
Series:	--
Voltage - Input (Min):	2.2V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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PMIC - Voltage Regulators - DC DC Switching RegulatorsPMIC, which stands for Power Management ICs, are an ever-important component of modern electronics. One important type of PMIC are Voltage Regulators which are used to supply a constant voltage to a particular electronic device. Of the various types of Voltage Regulators, DC DC Switching Regulators play an integral role.The S-85S1PC33-I8T1U is a DC DC Switching Regulator, meaning it utilizes a switch mode power supply to regulate the output voltage. It is an adjustable, step-down voltage regulator, meaning it converts a higher input voltage into a lower, adjustable output voltage. This makes the S-85S1PC33-I8T1U an ideal regulator for applications where the input voltage may vary extensively, such as battery powered devices.The S-85S1PC33-I8T1U operates in buck-boost configuration and is adjustable in the range of 0.6V-5.5V, with a continuous output of 1.5A @3.3V. It features an integrated P-channel MOSFET, two PWM controllers, and two associated compensation networks. These all work together to provide the four-standard functions that a regulator circuit requires: voltage sensing, controlling, regulating, and protection.The primary function of the voltage sensing function is to detect the level of the input voltage and adjust the output accordingly. It works by monitoring the supply voltage relative to an internal voltage reference, usually an adjustable voltage divider. Once the input voltage has been correctly detected, the control circuit will switch the appropriate parts of the circuit to make the necessary adjustments.The controlling function proceeds by comparing the detected voltage to the expected or programmed output voltage, which is determined by a feedback resistor. If the output voltage is not consistent then the control circuit shall adjust the duty cycle of the oscillator, which subsequently affects the output voltage.The regulating function consists of the integrated pass transistor and loop compensation networks. The pass transistor is the main component used to manipulate the output voltage and it works by distributing the power received from the input to the output. This occurs in a pulse width modulated manner, meaning that varying the duty cycle of the oscillator output causes the voltage to move from its highest to its lowest.Finally, the protection function is responsible for protecting against abnormal operation and ensures safety of the system. This function guards against a huge number of faults such as overvoltage, overcurrent, undervoltage, and short circuit. It works by monitoring the current and voltages through the circuit at all times, and in the event of any of the above mentioned occurrences the protection circuit will shut down the output and cut off the power until further action is taken.All in all, the S-85S1PC33-I8T1U makes an ideal choice for applications that require a step-down DC voltage regulator. Its adjustable output and integrated protection circuits make it perfect for applications where the input voltage is not consistent and may require fast switching. With its easy and intuitive design, the S-85S1PC33-I8T1U can provide a reliable, low-cost and consistent power supply to all kinds of electronic equipment.

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