L78L33ABD Allicdata Electronics
Allicdata Part #:

L78L33ABD-ND

Manufacturer Part#:

L78L33ABD

Price: $ 0.00
Product Category:

Integrated Circuits (ICs)

Manufacturer: STMicroelectronics
Short Description: IC REG LINEAR 3.3V 100MA 8SO
More Detail: Linear Voltage Regulator IC Positive Fixed 1 Outpu...
DataSheet: L78L33ABD datasheetL78L33ABD Datasheet/PDF
Quantity: 1000
Stock 1000Can Ship Immediately
Specifications
Current - Output: 100mA
Base Part Number: L78L33A
Supplier Device Package: 8-SO
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Operating Temperature: -40°C ~ 125°C
Protection Features: Over Current, Over Temperature, Short Circuit
Control Features: --
PSRR: 49dB (120Hz)
Current - Supply (Max): 6mA
Current - Quiescent (Iq): 5.5mA
Series: --
Voltage Dropout (Max): --
Voltage - Output (Max): --
Voltage - Output (Min/Fixed): 3.3V
Voltage - Input (Max): 30V
Number of Regulators: 1
Output Type: Fixed
Output Configuration: Positive
Part Status: Obsolete
Packaging: Tube 
Description

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Linear voltage regulators are an important class of PMICs (Power Management ICs) that are used to provide the necessary constant output voltage for applications such as microprocessors, digital circuits, and other electronic systems. Linear regulators convert an input voltage to a precisely regulated output voltage without the need for a switching regulator or other complex circuitry. Linear voltage regulators offer high-power efficiency, flexibility and stability in a wide range of applications, with minimal external components.

The most commonly used linear voltage regulator is the L78L33ABD, which is a triple voltage regulator providing 3 regulated output voltages of 3.3V, 10V, and 20V. The L78L33ABD is a low dropout voltage regulator, with an output voltage accuracy of ±1%. It can provide a maximum output current of 1A with an internal current limit for short-circuit protection. Moreover, the chip has internal thermal protection circuitry and is small in size to make it suitable for space-constrained applications.

The working principle of the L78L33ABD linear voltage regulator involves a three-stage operation. First, the input voltage is converted to a reference voltage, usually in the range of 1V to 4V. This reference voltage is compared to an internal voltage reference, and the output voltage is adjusted to match it. The specific circuit used to generate the reference voltage is an advanced design conceived by the manufacturers and allows for an accurate and stable output voltage.

In the second stage, the internal reference voltage comparison is used to control the transfer of energy from the input voltage to the output voltage. The amount of energy transferred depends on the amount of difference between the internal reference voltage and the input voltage. The energy is transferred using transistors, which act as switches and allow only the required amount of energy to be transferred. This ensures that the output voltage is held within the tolerance range specified by the manufacturer.

The final stage is error amplification, which involves reducing the effect of errors due to temperature variations and other sources of variance on the output voltage. This is done by amplifying the difference between the reference voltage and the input voltage, so that any small variation causing the output voltage to deviate from its desired value is efficiently corrected.

The L78L33ABD is a versatile, reliable and cost-effective voltage regulator for a wide range of applications. It offers excellent load and line regulation, fast transient response and low dropout voltage, resulting in very high efficiency levels. The regulator is heavily used in the automotive, medical, communications and industrial industries, as well as in applications such as power supplies and microcontrollers.

The specific data is subject to PDF, and the above content is for reference

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