Overview
The LM2574HVN-5.0/NOPB is a high-efficiency step-down (buck) switching regulator produced by Texas Instruments. This device is part of the LM2574 series, known for its simplicity and high performance. It is designed to deliver up to 0.5-A DC load current with excellent line and load regulation. The LM2574HVN-5.0/NOPB is available in an 8-pin MDIP package and offers a fixed output voltage of 5 V, making it suitable for a variety of applications requiring stable and efficient voltage regulation.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range | 4 V | - | 60 V | V |
| Output Voltage | 4.9 V | 5 V | 5.1 V | V |
| Output Current | 0.1 A | - | 0.5 A | A |
| Oscillator Frequency | 47 kHz | 52 kHz | 58 kHz | kHz |
| Efficiency | - | 77% | - | % |
| Maximum Duty Cycle | 93% | - | 98% | % |
| Current Limit | 0.7 A | - | 1.6 A | A |
| Quiescent Current | 5 mA | - | 10 mA | mA |
| Standby Quiescent Current | 50 μA | - | 200 μA | μA |
Key Features
- High-efficiency step-down (buck) switching regulator
- Fixed output voltage of 5 V
- Wide input voltage range: 4 V to 60 V
- Specified 0.5-A output current
- Requires only four external components
- 52-kHz fixed-frequency internal oscillator
- TTL shutdown capability with low-power standby mode
- Thermal shutdown and current-limit protection
- Uses readily available standard inductors
Applications
- Simple high-efficiency step-down (buck) regulator
- Efficient preregulator for linear regulators
- On-card switching regulators
- Positive-to-negative converter (buck-boost)
Q & A
- What is the output voltage of the LM2574HVN-5.0/NOPB?
The output voltage is fixed at 5 V. - What is the maximum input voltage for the LM2574HVN-5.0/NOPB?
The maximum input voltage is 60 V. - What is the typical output current of the LM2574HVN-5.0/NOPB?
The typical output current is up to 0.5 A. - What is the oscillator frequency of the LM2574HVN-5.0/NOPB?
The oscillator frequency is 52 kHz (typical). - Does the LM2574HVN-5.0/NOPB have thermal protection?
Yes, it includes thermal shutdown and current-limit protection. - How many external components are required for the LM2574HVN-5.0/NOPB?
It requires only four external components. - What is the efficiency of the LM2574HVN-5.0/NOPB?
The efficiency is typically 77%. - Can the LM2574HVN-5.0/NOPB be shut down electronically?
Yes, it has TTL shutdown capability with a low-power standby mode. - What is the quiescent current of the LM2574HVN-5.0/NOPB in standby mode?
The standby quiescent current is typically 50 μA to 200 μA. - What are some common applications of the LM2574HVN-5.0/NOPB?
Common applications include simple high-efficiency step-down regulators, efficient preregulators for linear regulators, on-card switching regulators, and positive-to-negative converters (buck-boost).
