Allicdata Part #: | MAX8877EUK25+T-ND |
Manufacturer Part#: |
MAX8877EUK25+T |
Price: | $ 1.27 |
Product Category: | Integrated Circuits (ICs) |
Manufacturer: | Maxim Integrated |
Short Description: | IC REG LINEAR 2.5V 150MA SOT23-5 |
More Detail: | Linear Voltage Regulator IC Positive Fixed 1 Outpu... |
DataSheet: | MAX8877EUK25+T Datasheet/PDF |
Quantity: | 3221 |
1 +: | $ 1.15920 |
10 +: | $ 1.09242 |
25 +: | $ 0.87394 |
50 +: | $ 0.83021 |
100 +: | $ 0.76469 |
250 +: | $ 0.72538 |
500 +: | $ 0.55495 |
Current - Output: | 150mA |
Base Part Number: | MAX8877 |
Supplier Device Package: | SOT-23-5 |
Package / Case: | SC-74A, SOT-753 |
Mounting Type: | Surface Mount |
Operating Temperature: | -40°C ~ 85°C |
Protection Features: | Over Current, Over Temperature, Reverse Polarity, Short Circuit |
Control Features: | Enable |
PSRR: | -- |
Current - Quiescent (Iq): | 180µA |
Series: | -- |
Voltage Dropout (Max): | 0.165V @ 150mA (Typ) |
Voltage - Output (Max): | -- |
Voltage - Output (Min/Fixed): | 2.5V |
Voltage - Input (Max): | 6.5V |
Number of Regulators: | 1 |
Output Type: | Fixed |
Output Configuration: | Positive |
Part Status: | Active |
Packaging: | Strip |
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In order to understand the application field and working principle of MAX8877EUK25+T, it is necessary to know the general notions of PMIC, voltage regulators and linear voltage regulators.
PMIC: A power management integrated circuit (PMIC) is a device containing a number of voltage regulators and power convertors that are combined together and dedicated to specific power management tasks or activities. PMICs simplify the design of power management systems, the main goal being to reduce current consumption, increase the efficiency and reduce the board area. They are used in any application requesting for power management, including automobiles, consumer electronics and communication systems.
Voltage Regulators: Voltage regulators are devices designed to keep a voltage constant even in the case of current and temperature fluctuations. They are usually composed of an output stage (following the specification of the application), an error amplifier and a feedback system. Voltage regulators can be linear or switch-mode.
Linear Voltage Regulators: Linear voltage regulators use a series pass element such as a transistor, to regulate an output voltage. They consume an amount of power that is equal to the voltage difference multiplied by the output current. In order to regulate the output voltage, a small fraction of the output current is added to the output voltage and the corresponding current is diverted to a control loop (usually composed of an error amplifier and a comparator). Linear voltage regulators are appropriate for low frequency and low power operations.
The MAX8877EUK25+T is a highly integrated linear voltage regulator. Its output voltage is adjustable via a PMOS/NMOS pass transistor. It has built-in short-circuit protection, as well as over-voltage and over-current protections. Additionally, it features a power good signal output, a shutdown pin and an enable pin in order to control the turn-on/turn-off sequence of the voltage regulator. As indicated previously, this device is appropriate for low frequency and low power operations. Therefore, the MAX8877EUK25+T is suitable for applications where very low core supply voltages are required and where a low noise output voltage is beneficial. Common applications are wireless receivers and optical data storage systems.
The working principle of the MAX8877EUK25+T, like in any other linear voltage regulator, is based on the consequence of Ohm\'s law and Kirchhoff\'s current law. First, the output current is sensed and added to the output voltage. This current is then diverted to the negative input of the error amplifier. The positive input of the error amplifier is connected to a reference voltage, usually provided by an external voltage source, thus controlling the output voltage. From this point on, the output voltage will remain constant. This is achieved by adjusting the internal pass transistor, which is connected in series to the output voltage and the input voltage. An increase in the output voltage will result in an increase in the current drawn by the pass transistor, resulting in a decrease in the output voltage. At the same time, a decrease in the output voltage will cause an increase in the current drawn by the pass transistor, thus resulting in an increase in the output voltage. In this way, the output voltage is regulated.
In conclusion, the MAX8877EUK25+T is a linear voltage regulator suitable for applications requiring very low core supply voltages. Its working principle is based on the consequence of Ohm\'s law and Kirchhoff\'s current law. When the output voltage increases, the current drawn by the pass transistor increases, thus resulting in a decrease of the output voltage and regulating it. Therefore, the MAX8877EUK25+T is a viable option for applications such as wireless receivers and optical data storage systems.
The specific data is subject to PDF, and the above content is for reference
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