Overview
The LM2575-5.0WU from Microchip Technology is a high-efficiency step-down switching regulator. This device is part of the LM2575 series, which offers a compact and efficient replacement for traditional three-terminal adjustable linear regulators. It is designed to reduce the size of the heat sink and, in many cases, eliminate the need for one altogether. The LM2575-5.0WU is available in a TO-263-5 (D2PAK5) package and is suitable for a wide range of applications requiring high efficiency and reliability.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Technology |
| Type of Integrated Circuit | PMIC (Power Management IC) |
| Kind of Integrated Circuit | DC/DC Converter |
| Input Voltage | 4V to 40V DC |
| Output Voltage | 5V DC (fixed), adjustable versions from 1.23V to 37V |
| Output Current | 1A |
| Case | TO-263-5 (D2PAK5) |
| Mounting | SMD (Surface Mount) |
| Frequency | 52kHz (fixed frequency internal oscillator) |
| Topology | Buck |
| Number of Channels | 1 |
| Operating Temperature | -40°C to +85°C |
| Efficiency | Typically > 80% |
| Tolerance | ±3% (fixed version), ±2% (adjustable version) |
| Duty Cycle Factor | 0...93% |
Key Features
- High efficiency, typically > 80%
- Wide input voltage range: 4V to 40V
- Wide output voltage range: 1.23V to 37V (adjustable versions)
- Guaranteed 1A output current
- Requires only 4 external components
- 52kHz fixed frequency internal oscillator
- Low power standby mode IQ typically < 200µA
- Thermal shutdown and current limit protection
- 100% electrical thermal limit burn-in
- Uses readily available standard inductors
Applications
- Simple high-efficiency step-down (buck) regulator
- Efficient pre-regulator for linear regulators
- On-card switching regulators
- Positive to negative converter (inverting buck-boost)
- Isolated flyback converter using minimum number of external components
- Negative boost converter
Q & A
- What is the input voltage range of the LM2575-5.0WU?
The input voltage range is 4V to 40V DC. - What is the output voltage of the fixed version of the LM2575-5.0WU?
The output voltage of the fixed version is 5V DC. - What is the maximum output current of the LM2575-5.0WU?
The maximum output current is 1A. - What is the package type of the LM2575-5.0WU?
The package type is TO-263-5 (D2PAK5). - What is the operating temperature range of the LM2575-5.0WU?
The operating temperature range is -40°C to +85°C. - What is the efficiency of the LM2575-5.0WU?
The efficiency is typically greater than 80%. - Does the LM2575-5.0WU have thermal protection?
Yes, it has thermal shutdown and current limit protection. - How many external components are required for the LM2575-5.0WU?
It requires only 4 external components. - What is the frequency of the internal oscillator in the LM2575-5.0WU?
The frequency of the internal oscillator is 52kHz. - What are some common applications of the LM2575-5.0WU?
Common applications include simple high-efficiency step-down regulators, efficient pre-regulators for linear regulators, and on-card switching regulators.
