S-13R1B17-A4T2U3 vs S-13R1A40-A4T2U3
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| Category | PMIC - Voltage Regulators - Linear | PMIC - Voltage Regulators - Linear |
| Manufacturer | ABLIC U.S.A. Inc. | ABLIC U.S.A. Inc. |
| Description | IC REG LINEAR 1.7V 150MA HSNT4-B | IC REG LINEAR 4V 150MA HSNT4-B |
| Package | Tape & Reel (TR) | Tape & Reel (TR) |
| Series | S-13R1 | S-13R1 |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 4-SMD, Flat Lead Exposed Pad | 4-SMD, Flat Lead Exposed Pad |
| Supplier Device Package | HSNT-4-B | HSNT-4-B |
| Output Type | Fixed | Fixed |
| Voltage - Output (Min/Fixed) | 1.7V | 4V |
| Voltage - Output (Max) | - | - |
| Current - Output | 150mA | 150mA |
| Output Configuration | Positive | Positive |
| Control Features | Enable | Enable |
| Voltage - Input (Max) | 5.5V | 5.5V |
| Number of Regulators | 1 | 1 |
| Voltage Dropout (Max) | 0.38V @ 100mA | 0.23V @ 100mA |
| Current - Quiescent (Iq) | 1 µA | 1 µA |
| Current - Supply (Max) | 9 µA | 9 µA |
| PSRR | 70dB (1kHz) | 70dB (1kHz) |
| Protection Features | Overcurrent, Reverse Current, Thermal Shutdown | Overcurrent, Reverse Current, Thermal Shutdown |
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1. What is the difference between linear regulators and switching regulators?
There are significant differences between linear regulators and switching regulators in terms of working principles, efficiency, stability, cost and application range.
Working principle:
Linear regulators achieve the function of stabilizing the output at a set value by adjusting the voltage difference between the output voltage and the input voltage. It achieves stable output voltage by controlling the conductivity state of the power transistor.
The switching regulator converts the input voltage into a pulse signal transmission and smoothes the output through a filter by quickly switching between the input and output ends to achieve the function of stabilizing the output at the set value. The switching regulator uses PWM (pulse width modulation) control to control the output voltage by adjusting the time duty ratio of the high and low levels within a cycle.
Efficiency:
The efficiency of the linear regulator is relatively low, usually between 60% and 70%. When the voltage differenc -
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. When should a linear regulator be used instead of a switching regulator?
In low-power and low-frequency application scenarios, a linear regulator should be used instead of a switching regulator.
Linear regulator Suitable for low-power and low-frequency applications, with simple circuit structure, low noise and good stability. They control the output voltage of the transistor through a current amplifier to keep the output voltage stable. This working mode makes linear regulators perform well in low-power and low-frequency applications, although they are less efficient and generate more heat, and their application range is limited. In contrast, switching regulators use high-frequency pulse modulation technology to convert input voltage into a stable output voltage. They have the advantages of high efficiency, small size and fast response, and are suitable for high-power and high-frequency applications. Therefore, when the application requirements are not the main considerations for circuit complexity and cost, but have high requirements for the stability and -
4. How to choose a linear regulator?
1. Switching regulator: A switching regulator uses an output stage that repeatedly switches between "on" and "off" states to generate an output voltage together with an energy storage component. Its adjustment is achieved by adjusting the switching timing based on the feedback sample of the output voltage. In a fixed-frequency regulator, the switching timing is adjusted by adjusting the pulse width of the switching voltage, which is called PWM control.
2. Parameter regulator: LDO is a linear regulator. Linear regulators use transistors or FETs operating in their linear region to subtract excess voltage from the applied input voltage to produce a regulated output voltage. This transistor allows saturation, so the regulator can have a very low dropout voltage, usually around 200mV.
3. Regulators for laser cutting machines: According to the use requirements of high-power laser cutting machines and the current power supply situation in my country, regulators that meet
