Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

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Mfr Part #	Quantity Available	Price	Series	Package	Product Status	Output Configuration	Output Type	Number of Regulators	Voltage - Input (Max)	Voltage - Output (Min/Fixed)	Voltage - Output (Max)	Voltage Dropout (Max)	Current - Output	Current - Quiescent (Iq)	Current - Supply (Max)	PSRR	Control Features	Protection Features	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package

AP2138N-3.3TRG1 IC REG LINEAR 3.3V 250MA SOT23-3 Diodes Incorporated	77,139 In Stock	1 : ¥3.06000 Cut Tape (CT) 3,000 : ¥0.87837 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Positive	Fixed	1	6V	3.3V	-	0.6V @ 250mA	250mA	1.5 µA	-	-	-	Over Current	-40°C ~ 85°C (TA)	Surface Mount	TO-236-3, SC-59, SOT-23-3	SOT-23-3
LT1521CST-3.3#PBF IC REG LIN 3.3V 300MA SOT223-3 Analog Devices Inc.	3,631 In Stock	1 : ¥54.83000 Tube	-	Tube	Active	Positive	Fixed	1	20V	3.3V	-	0.75V @ 300mA	300mA	25 µA	12 mA	58dB (120Hz)	Enable	Over Current, Over Temperature, Reverse Polarity	0°C ~ 125°C	Surface Mount	TO-261-4, TO-261AA	SOT-223-3

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Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Linear voltage regulators, including LDO (Low Drop Out) types, are used to provide a stable output voltage that is nominally invariant with respect to changes in load current, input voltage, or environmental factors. Their operating principle requires that the input voltage be maintained above the desired output voltage by some minimum amount, and function on the basis of converting whatever excess voltage is present at the input to heat. While this renders them less efficient than switch-mode voltage regulators for most applications, they are often better suited for applications with high sensitivity to noise.