Overview
The LM2576D2T-3.3G is a high-efficiency step-down switching regulator produced by onsemi. This monolithic integrated circuit is designed for easy and convenient design of a buck converter, capable of driving a 3.0 A load with excellent line and load regulation. The device is available in a surface mount package and is suitable for a wide range of applications requiring efficient power conversion.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Current | 3.0 | A |
| Output Voltage | 3.3 | V |
| Input Voltage Range | 7.0 - 40 | V |
| Switching Frequency | 52 kHz | kHz |
| Operating Temperature Range | -40 to 125 | °C |
| Efficiency (Typical) | 75% | % |
| Package Type | D2T (Surface Mount) | |
| Thermal Shutdown | Yes | |
| Current Limit Protection | Yes |
Key Features
- Fixed output voltage of 3.3 V, with other versions available at 5.0 V, 12 V, 15 V, and an adjustable output version.
- Guaranteed ±4% tolerance on output voltage within specified input voltages and output load conditions.
- Wide input voltage range from 7.0 V to 40 V.
- Requires only 4 external components for a basic application.
- 52 kHz fixed frequency internal oscillator.
- TTL shutdown capability with low power standby mode (80 μA typical standby current).
- High efficiency, especially compared to three-terminal linear regulators.
- Uses readily available standard inductors.
- Thermal shutdown and cycle-by-cycle current limiting for full protection under fault conditions.
- 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 supplies for battery chargers.
Q & A
- What is the maximum output current of the LM2576D2T-3.3G?
The maximum output current is 3.0 A.
- What is the output voltage of the LM2576D2T-3.3G?
The output voltage is fixed at 3.3 V.
- What is the input voltage range for the LM2576D2T-3.3G?
The input voltage range is from 7.0 V to 40 V.
- What is the switching frequency of the LM2576D2T-3.3G?
The switching frequency is 52 kHz.
- Does the LM2576D2T-3.3G have thermal shutdown protection?
Yes, it includes thermal shutdown protection.
- How many external components are required for a basic application of the LM2576D2T-3.3G?
Only 4 external components are required.
- What is the typical standby current of the LM2576D2T-3.3G in low power standby mode?
The typical standby current is 80 μA.
- Is the LM2576D2T-3.3G available in Pb-free packages?
Yes, Pb-free packages are available.
- What type of oscillator does the LM2576D2T-3.3G use?
The LM2576D2T-3.3G uses a 52 kHz fixed frequency internal oscillator.
- What are some common applications of the LM2576D2T-3.3G?
Common applications include simple high-efficiency step-down regulators, efficient pre-regulators for linear regulators, on-card switching regulators, and power supplies for battery chargers.
