AZ1117S-5.0E1 vs NCP4620DSN30T1G
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| Category | PMIC - Voltage Regulators - Linear | PMIC - Voltage Regulators - Linear |
| Manufacturer | Diodes Incorporated | ON Semiconductor |
| Description | IC REG LINEAR 5V 1.25A TO263-2 | IC REG LINEAR 3V 150MA SOT23-5 |
| Package | Tape & Reel (TR) | -Reel® |
| Series | AZ1117 | - |
| Operating Temperature | -40°C ~ 125°C (TJ) | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | TO-263-3, D²Pak (2 Leads + Tab), TO-263AB | SC-74A, SOT-753 |
| Supplier Device Package | TO-263 | SOT-23-5 |
| Output Type | Fixed | Fixed |
| Voltage - Output (Min/Fixed) | 5V | 3V |
| Voltage - Output (Max) | - | - |
| Current - Output | 1.25A | 150mA |
| Output Configuration | Positive | Positive |
| Control Features | - | Enable |
| Voltage - Input (Max) | 15V | 10V |
| Number of Regulators | 1 | 1 |
| Voltage Dropout (Max) | 1.25V @ 1A | 0.48V @ 150mA |
| Current - Quiescent (Iq) | 10 mA | 40 µA |
| Current - Supply (Max) | - | - |
| PSRR | 75dB (120Hz) | 70dB (1kHz) |
| Protection Features | Thermal Shutdown | Over Current, Over Temperature |
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1. 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. -
2. 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 -
3. What are the alternatives to linear regulators?
Alternatives to linear regulators include Semiconductor HT7144S, K7805-2000R3, TPS70933DBVR, CLR6212, XC6220B331MR-G, LR7550-M, SGM2054XTD10G/TR, ME6213C33M5G, RS3236-3.3YF5, KL2036-2.2V, etc. These alternatives cover different package forms (such as SOT-23, SOP8, etc.) and output voltage and current specifications to meet the needs of different applications. For example, the HT7144S is a three-terminal linear regulator, while the TPS70933DBVR is an LDO (low dropout linear regulator) with lower output voltage and current specifications. CLR6212 and XC6220B331MR-G provide higher output current capabilities and are suitable for applications that require larger current outputs. LR7550-M and SGM2054XTD10G/TR provide specific voltage and current specifications to meet the needs of specific fields. ME6213C33M5G and RS3236-3.3YF5 are regulators with specific packaging forms, suitable for space-constrained application scenarios. KL2036-2.2V is a linear regulator with a lower output voltage, su
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4. What are the three types of voltage regulator?
The three types of voltage regulators include the contact voltage regulator, the transistor regulator and the integrated circuit regulator.
Contact voltage regulator: This is the type of voltage regulator used earlier. Its working principle is based on the vibration of the contact, but there is mechanical inertia and electromagnetic inertia, resulting in low voltage adjustment accuracy. Large, poor reliability, and short life, so it has been eliminated.
Crystal tube regulator: With the development of semiconductor technology, the transistor regulator becomes the mainstream. It uses a triode for voltage adjustment. Compared with the contact -type voltage regulator, the advantages of the transistor regulator is that the response speed, high efficiency, small volume, light weight, and not easily affected by external magnetic fields are widely used.
Integrated circuit regulator: Integrated circuit regulator is a new type of voltage regulator developed in recent years. It integrates mult
