Overview
The LM2574N-ADJG is a monolithic integrated circuit designed as a step-down switching regulator (buck converter) by onsemi. This device is part of the LM2574 series, which is ideally suited for easy and convenient design of power supply systems. The LM2574N-ADJG is an adjustable output version, allowing for output voltages ranging from 1.23 V to 37 V with a guaranteed 4% tolerance on the output voltage within specified input voltages and output load conditions. It is capable of driving a 0.5 A load with excellent line and load regulation, making it highly efficient compared to traditional linear regulators, especially at higher input voltages.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 4.75 V to 40 V |
| Output Voltage Range (Adjustable) | 1.23 V to 37 V +/-4% |
| Output Current | 0.5 A |
| Switching Frequency | 52 kHz |
| Efficiency | Up to 85% |
| Package Type | PDIP-8 |
| Thermal Shutdown | Yes |
| Current Limit Protection | Yes |
| External Shutdown | TTL Shutdown Capability, Low Power Standby Mode |
| Moisture Sensitivity Level (MSL) | 1 |
Key Features
- Guaranteed 4% tolerance on output voltage within specified input voltages and output load conditions.
- +/-10% on the oscillator frequency (+/-2% over 0°C to 125°C).
- External shutdown with TTL shutdown capability and low power standby mode (80 uA typical standby current).
- Cycle-by-cycle current limiting and thermal shutdown for full protection under fault conditions.
- High efficiency, reducing the need for a heatsink.
- Uses readily available standard inductors.
- Requires only 4 external components for operation.
Applications
- Efficient pre-regulator for linear regulators.
- On-card switching regulators.
- Power supply for battery chargers.
- Simple and high-efficiency step-down (buck) regulators.
- Automotive NCV version available.
Q & A
- What is the input voltage range of the LM2574N-ADJG?
The input voltage range is from 4.75 V to 40 V.
- What is the adjustable output voltage range of the LM2574N-ADJG?
The adjustable output voltage range is from 1.23 V to 37 V +/-4%.
- What is the maximum output current of the LM2574N-ADJG?
The maximum output current is 0.5 A.
- What is the switching frequency of the LM2574N-ADJG?
The switching frequency is 52 kHz.
- Does the LM2574N-ADJG have thermal shutdown and current limit protection?
Yes, it includes both thermal shutdown and cycle-by-cycle current limiting for protection under fault conditions.
- What is the efficiency of the LM2574N-ADJG?
The efficiency can be up to 85%.
- What package type is the LM2574N-ADJG available in?
The LM2574N-ADJG is available in a PDIP-8 package.
- Does the LM2574N-ADJG require many external components?
No, it requires only 4 external components for operation.
- Is the LM2574N-ADJG suitable for automotive applications?
Yes, an automotive NCV version is available.
- What is the moisture sensitivity level (MSL) of the LM2574N-ADJG?
The MSL is 1.
