Overview
The LM2575D2T-15R4G is a part of the LM2575 series of Buck Switching Regulators produced by onsemi. These monolithic integrated circuits are designed for easy and convenient implementation of step-down switching regulators (buck converters). The LM2575D2T-15R4G specifically provides a fixed output voltage of 15 V and is capable of driving a 1.0 A load with excellent line and load regulation.
This device is notable for its high efficiency, especially when compared to traditional three-terminal linear regulators, making it ideal for applications where power dissipation needs to be minimized. The LM2575 series also features a simple design that requires only four external components, simplifying the power supply design process.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | 15 | V |
| Output Current | 1.0 | A |
| Input Voltage Range | 4.75 to 40 | V |
| Operating Junction Temperature Range | -40 to +125 | °C |
| Fixed Frequency Internal Oscillator | 52 kHz | |
| Thermal Resistance, Junction-to-Ambient | 65 °C/W | |
| Moisture Sensitivity Level (MSL) | 1 | |
| Package Type | 2PAK (Surface Mount) | |
| Pb-Free | Yes |
Key Features
- High Efficiency: Significantly higher efficiency compared to traditional three-terminal linear regulators, especially with higher input voltages.
- Simple Design: Requires only four external components to simplify the power supply design.
- Fixed Output Voltage: Available in fixed output voltages, with the LM2575D2T-15R4G providing a fixed 15 V output.
- Adjustable Version: Also available in an adjustable version with an output voltage range of 1.23 V to 37 V ±4%.
- TTL Shutdown Capability: Features TTL shutdown capability with a low power standby mode.
- Thermal and Current Protection: Includes cycle-by-cycle current limiting and thermal shutdown for full protection under fault conditions.
- Standard Inductors: Uses readily available standard inductors optimized for use with the LM2575.
- Pb-Free Packages: Available in Pb-free packages, suitable for various environmental and regulatory requirements.
Applications
- Simple and High-Efficiency Step-Down (Buck) Regulators: Ideal for applications requiring efficient step-down conversion.
- Efficient Pre-Regulator for Linear Regulators: Can be used as a pre-regulator to improve the overall efficiency of linear regulator systems.
- On-Card Switching Regulators: Suitable for on-card switching regulator applications due to its compact design and high efficiency.
- Positive to Negative Converters (Buck-Boost): Can be configured for buck-boost applications.
- Negative Step-Up Converters: Can be used in negative step-up converter configurations.
- Power Supply for Battery Chargers: Applicable in power supply designs for battery chargers.
Q & A
- What is the output voltage of the LM2575D2T-15R4G?
The output voltage of the LM2575D2T-15R4G is 15 V.
- What is the maximum output current of the LM2575D2T-15R4G?
The maximum output current is 1.0 A.
- What is the input voltage range for the LM2575D2T-15R4G?
The input voltage range is from 4.75 V to 40 V.
- What is the operating junction temperature range for the LM2575D2T-15R4G?
The operating junction temperature range is from -40°C to +125°C.
- Does the LM2575D2T-15R4G have thermal protection?
Yes, it includes thermal shutdown and cycle-by-cycle current limiting for protection under fault conditions.
- What is the fixed frequency of the internal oscillator in the LM2575D2T-15R4G?
The fixed frequency of the internal oscillator is 52 kHz.
- Is the LM2575D2T-15R4G Pb-free?
Yes, the LM2575D2T-15R4G is available in Pb-free packages.
- What is the moisture sensitivity level (MSL) of the LM2575D2T-15R4G?
The MSL is 1.
- What type of package does the LM2575D2T-15R4G come in?
The LM2575D2T-15R4G comes in a 2PAK (Surface Mount) package.
- Does the LM2575D2T-15R4G have TTL shutdown capability?
Yes, it features TTL shutdown capability with a low power standby mode.
