Overview
The LM2574N-12G is a monolithic integrated circuit from onsemi, designed as a step-down switching regulator (buck converter). This device is part of the LM2574 series, which is ideal for easy and convenient design of high-efficiency power supplies. The LM2574N-12G is specifically configured to provide a fixed output voltage of 12 V and can drive a load current of up to 0.5 A. It features high efficiency, especially at higher input voltages, and requires only a few external components to operate, simplifying the power supply design.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | 12 V | V |
| Output Current | 0.5 A | A |
| Input Voltage Range | 4.75 to 40 V | V |
| Oscillator Frequency | 52 kHz (typical) | kHz |
| Efficiency (Vin = 15 V, ILoad = 0.5 A) | 88% (typical) | % |
| Output Voltage Tolerance | ±4% (max over line and load conditions) | % |
| Thermal Shutdown | Yes | |
| Current Limit | Yes, cycle-by-cycle current limiting | |
| Package Type | PDIP-8 (Pb-Free) | |
| Operating Junction Temperature Range | -40°C to +125°C | °C |
| Maximum Junction Temperature | 150°C | °C |
Key Features
- Fixed output voltage of 12 V, with other versions available for 3.3 V, 5.0 V, 15 V, and adjustable output.
- Guaranteed 0.5 A output current.
- Wide input voltage range: 4.75 to 40 V.
- Requires only 4 external components.
- 52 kHz fixed frequency internal oscillator.
- TTL shutdown capability with low power standby mode.
- High efficiency, especially at higher input voltages.
- Uses readily available standard inductors.
- Thermal shutdown and current limit protection.
- Pb-Free device.
Applications
- Simple and high-efficiency step-down (buck) regulators.
- Efficient pre-regulator 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 output voltage of the LM2574N-12G?
The output voltage of the LM2574N-12G is 12 V. - What is the maximum output current of the LM2574N-12G?
The maximum output current is 0.5 A. - What is the input voltage range for the LM2574N-12G?
The input voltage range is from 4.75 V to 40 V. - What is the oscillator frequency of the LM2574N-12G?
The oscillator frequency is 52 kHz (typical). - Does the LM2574N-12G have thermal shutdown protection?
Yes, it includes thermal shutdown protection. - How many external components are required to operate the LM2574N-12G?
Only 4 external components are required. - What type of package does the LM2574N-12G come in?
The LM2574N-12G comes in a PDIP-8 (Pb-Free) package. - What is the operating junction temperature range for the LM2574N-12G?
The operating junction temperature range is -40°C to +125°C. - Does the LM2574N-12G have current limit protection?
Yes, it includes cycle-by-cycle current limiting. - What is the maximum junction temperature for the LM2574N-12G?
The maximum junction temperature is 150°C.
