Overview
The LM2576D2T-3.3 is a monolithic integrated circuit from onsemi, designed as a step-down switching regulator (buck converter). This device is part of the LM2576 series, which is ideally suited for easy and convenient design of power supply systems. The LM2576D2T-3.3 is specifically configured to provide a fixed output voltage of 3.3 V, making it suitable for a wide range of applications requiring efficient and reliable voltage regulation.
The LM2576 series is known for its high efficiency, especially when compared to traditional three-terminal linear regulators, particularly at higher input voltages. This efficiency reduces the need for large heatsinks, making the design more compact and cost-effective. The regulator requires only a few external components, simplifying the design process and minimizing the number of parts needed.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage | 3 V to 40 V | V |
| Output Voltage | 3.3 V (fixed) | V |
| Output Current (Max) | 3 A | A |
| Switching Frequency (Max) | 52 kHz | kHz |
| Operating Temperature Range | -40°C to +125°C | °C |
| Duty Cycle (Max) | 98% | % |
| Efficiency | Up to 77% | % |
| Quiescent Current | 9 mA | mA |
| Storage Temperature Range | -65°C to +150°C | °C |
| Moisture Sensitivity Level (MSL) | 1 | |
| Package Style | TO-263-5 (D2PAK5) | |
| Mounting Method | Surface Mount |
Key Features
- Fixed output voltage of 3.3 V, with other versions available in 5.0 V, 12 V, 15 V, and adjustable output
- Guaranteed 3.0 A output current
- Wide input voltage range from 3 V to 40 V
- Requires only 4 external components for operation
- 52 kHz fixed frequency internal oscillator
- TTL shutdown capability with low power standby mode
- High efficiency, reducing the need for large heatsinks
- Uses readily available standard inductors
- Thermal shutdown and cycle-by-cycle current limiting for protection
- Moisture Sensitivity Level (MSL) equals 1
- Pb-free packages available
Applications
- Simple high-efficiency step-down (buck) regulators
- Efficient pre-regulators for linear regulators
- On-card switching regulators
- Positive to negative converters (buck-boost)
- Negative step-up converters
- Power supply for battery chargers
Q & A
- What is the maximum output current of the LM2576D2T-3.3?
The maximum output current is 3 A.
- What is the fixed output voltage of the LM2576D2T-3.3?
The fixed output voltage is 3.3 V.
- What is the input voltage range for the LM2576D2T-3.3?
The input voltage range is from 3 V to 40 V.
- What is the switching frequency of the LM2576D2T-3.3?
The switching frequency is 52 kHz.
- Does the LM2576D2T-3.3 have thermal protection?
Yes, it includes thermal shutdown and cycle-by-cycle current limiting for protection.
- How many external components are required for the LM2576D2T-3.3 to operate?
Only 4 external components are required.
- What is the package style of the LM2576D2T-3.3?
The package style is TO-263-5 (D2PAK5).
- Is the LM2576D2T-3.3 Pb-free?
Yes, Pb-free packages are available.
- What is the operating temperature range of the LM2576D2T-3.3?
The operating temperature range is -40°C to +125°C.
- Does the LM2576D2T-3.3 have a low power standby mode?
Yes, it has TTL shutdown capability with a low power standby mode.
