L4931CPT33

Current - Output:	250mA
Base Part Number:	L4931C
Supplier Device Package:	PPAK
Package / Case:	TO-252-5, DPak (4 Leads + Tab), TO-252AD
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	--
PSRR:	73dB ~ 55dB (120Hz ~ 10kHz)
Current - Supply (Max):	6mA
Current - Quiescent (Iq):	1mA
Series:	--
Voltage Dropout (Max):	0.8V @ 250mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V
Voltage - Input (Max):	20V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tube

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Introduction to L4931CPT33The L4931CPT33 is a low-drop three terminal linear voltage regulator. It incorporates many of the features of the L4931C regulator and combines them in a small 6-pin package. This device is well-suited for applications requiring low-dropout performance and an extremely low quiescent current. It has a temperature range of -40°C to +125°C and operates over a wide input voltage range from 3.0 V to 25 V.Applications of L4931CPT33The L4931CPT33 linear regulator can be used in a wide range of applications. It is frequently used in portable products like mobile phones, PDAs, medical equipment, and other consumer products with stringent requirements for low quiescent current, low dropout and high efficiency. It is also used in battery-based systems, over-voltage protection circuits and power supplies for compact LCDs.Working Principle of L4931CPT33The L4931CPT33 is a three-terminal linear regulator. It features an internal PNP pass transistor, an output voltage divider, and a temperature compensation circuitry. When the regulator is operating, the internal PNP pass transistor receives a base current from the internal voltage divider and regulates the output voltage. The output voltage is limited by the rated current of the pass transistor. When the input voltage is greater than the setpoint voltage, a current is generated in the output to maintain the setpoint voltage.The temperature compensation circuitry of the L4931CPT33 is designed to maintain the output voltage in the presence of temperature variations. This is achieved by varying the current at the junction of the output voltage divider. The output voltage can be adjusted by changing the voltage of the reference voltage input or of the internal voltage divider. ConclusionThe L4931CPT33 is an ideal choice for applications that require low dropout, low quiescent current, and excellent temperature stability. It is suitable for portable products and battery-based systems and can be used as an over-voltage protection circuit or for powering compact LCDs. This device is available in a small 6-pin package and is capable of providing high efficiency over a wide range of input voltages and temperatures.

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