Overview
The LM2576T-12/NOPB is a monolithic integrated circuit from Texas Instruments, designed as a step-down (buck) switching regulator. This device is part of the LM2576 series, which offers high-efficiency power conversion with a wide input voltage range. The LM2576T-12/NOPB is specifically configured to provide a fixed output voltage of 12 V and can drive a load current of up to 3 A. It is known for its excellent line and load regulation, making it a reliable choice for various power supply applications.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Maximum Supply Voltage | - | 40 V (LM2576), 60 V (LM2576HV) | - | 45 V (LM2576), 63 V (LM2576HV) | V |
| Output Voltage | VIN = 25 V, ILOAD = 0.5 A | 11.76 | 12 | 12.24 | V |
| Output Voltage Range | 0.5 A ≤ ILOAD ≤ 3 A, 15 V ≤ VIN ≤ 40 V (LM2576), 15 V ≤ VIN ≤ 60 V (LM2576HV) | 11.52 | 12 | 12.48 (LM2576), 12.54 (LM2576HV) | V |
| Efficiency | VIN = 15 V, ILOAD = 3 A | - | 88% | - | % |
| Maximum Junction Temperature | - | - | - | 150°C | °C |
| Storage Temperature Range | - | -65°C | - | 150°C | °C |
Key Features
- High-efficiency step-down (buck) switching regulator capable of delivering up to 3-A DC load current.
- Fixed output voltage of 12 V, with other versions available for 3.3 V, 5 V, 15 V, and adjustable output.
- Wide input voltage range: up to 40 V for LM2576 and up to 60 V for LM2576HV.
- Excellent line and load regulation with ±4% tolerance on output voltage.
- Internal fixed-frequency oscillator and cycle-by-cycle current limiting.
- Thermal shutdown and external shutdown with 50-μA typical standby current.
- Simple PCB layout design with minimal external components required.
Applications
- Motor drives
- Merchant network and server power supplies
- Appliances
- Test and measurement equipment
Q & A
- What is the maximum output current of the LM2576T-12/NOPB? The maximum output current is up to 3 A.
- What are the available output voltage options for the LM2576 series? The LM2576 series offers fixed output voltages of 3.3 V, 5 V, 12 V, 15 V, and an adjustable output version.
- What is the maximum supply voltage for the LM2576 and LM2576HV? The maximum supply voltage is 40 V for LM2576 and 60 V for LM2576HV.
- What is the efficiency of the LM2576T-12/NOPB at full load? The efficiency is approximately 88% at VIN = 15 V and ILOAD = 3 A.
- Does the LM2576T-12/NOPB have thermal protection? Yes, it includes thermal shutdown for full protection under fault conditions.
- How many external components are required for the LM2576T-12/NOPB? The device requires a minimal number of external components, making it simple to use.
- What is the operating temperature range for the LM2576T-12/NOPB? The operating temperature range is -40°C to 125°C.
- Is the LM2576T-12/NOPB suitable for high-reliability applications? Yes, it is designed for high-reliability applications with features such as cycle-by-cycle current limiting and thermal shutdown.
- Can the LM2576T-12/NOPB be used in safety-critical applications? It is advisable to consult the datasheet and Texas Instruments for specific guidance on using the device in safety-critical applications.
- What are the package options available for the LM2576T-12/NOPB? The device is available in packages such as TO-220 and DDPAK/TO-263.
