MAX8875EUK25+ vs MAX8883EUTA5+
| Part Number |
|
|
| Category | PMIC - Voltage Regulators - Linear | PMIC - Voltage Regulators - Linear |
| Manufacturer | Maxim Integrated | Maxim Integrated |
| Description | IC REG LINEAR 2.5V 150MA SOT23-5 | IC REG LINEAR 1.8V/3.3V SOT23-6 |
| Package | Strip | SOT-23-6 |
| Series | - | - |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | SC-74A, SOT-753 | SOT-23-6 |
| Supplier Device Package | SOT-23-5 | SOT-23-6 |
| Output Type | Fixed | Fixed |
| Voltage - Output (Min/Fixed) | 2.5V | 1.8V, 3.3V |
| Voltage - Output (Max) | - | - |
| Current - Output | 150mA | 160mA, 160mA |
| Output Configuration | Positive | Positive |
| Control Features | Enable, Power Good | Shutdown |
| Voltage - Input (Max) | 6.5V | 6.5V |
| Number of Regulators | 1 | 2 |
| Voltage Dropout (Max) | 0.165V @ 150mA (Typ) | -, 0.144V @ 80mA |
| Current - Quiescent (Iq) | 180 µA | 265µA |
| Current - Supply (Max) | - | - |
| PSRR | 60dB (100Hz) | 60dB (100Hz) |
| Protection Features | Over Temperature, Reverse Polarity, Short Circuit | Over Current, Over Temperature, Short Circuit |
-
1. What are the characteristics of linear regulators?
Linear regulators have the characteristics of low cost, small package, few peripheral devices and low noise. There are many types of linear regulator packages, which are very suitable for use in LCD color TVs. For fixed voltage output applications, only 2-3 small capacitors are needed to form the entire solution. Ultra-low output voltage noise is the biggest advantage of linear regulators. The output voltage ripple is less than 35V (RMS), and it has an extremely high signal-to-noise control ratio, which is very suitable for powering small signal processing circuits that are sensitive to noise.
-
2. What problems will linear regulators bring to the circuit?
The problems that linear regulators bring to the circuit mainly include low efficiency and a lot of heat.
Linear The main working principle of the voltage regulator is to control the output voltage of the transistor through a current amplifier to keep the output voltage stable. This working mode causes the linear regulator to control the regulating tube through a differential voltage when adjusting the output voltage. The control tube needs to absorb part of the input voltage, which makes the efficiency of the linear regulator relatively low. In practical applications, this means that the linear regulator will convert the difference between the input voltage and the output voltage into heat energy, causing serious heating of the device, especially when the input and output voltage difference is large, this power loss will further increase, causing the device to heat up. -
3. Do linear regulators need capacitors?
Linear regulators usually require capacitors.
The working principle and design requirements of linear regulators determine that they usually require capacitors to ensure stable operation. These capacitors are mainly used to filter and stabilize the output voltage, help reduce output ripple and noise, and thus improve the stability and reliability of the power supply.
Specifically:
1. Input and output capacitors: Linear regulators usually require one or more input capacitors and one output capacitor. These capacitors help smooth the input and output voltages, reduce voltage fluctuations, and thus provide a stable output voltage.
2. Power supply rejection capability: The power supply rejection capability of a linear regulator is an important indicator, which is related to whether it can effectively suppress unwanted signals and avoid interference with the output voltage. If the power supply rejection capability is poor, unnecessary signals may be left behind, affecting the purity of -
4. Can a linear regulator be up?
Linear regulators cannot be boost.
The main function of a linear regulator is to stabilize the output voltage, protecting the electrical equipment from high or unstable voltage effects. It realizes a stable output voltage by adjusting the gap between the output voltage and the input voltage, but this process is limited to lowering the voltage, not including the voltage. The working principle of a linear regulator is to regulate the voltage by converting excess voltage into heat loss, thereby realizing the voltage regulation. This feature determines that it does not have the voltage function.
