Overview
The LM5001MAX, produced by Texas Instruments, is a high-voltage switch-mode regulator designed to implement efficient boost, flyback, SEPIC, and forward converters. This regulator integrates a 75-V N-Channel MOSFET with a 1-A peak current limit, making it suitable for a wide range of applications, including industrial, communications, and automotive systems. The LM5001MAX features a current mode control architecture, which provides simple loop compensation and superior rejection of input transients. It also includes various protection features such as current limiting, thermal shutdown, undervoltage lockout, and remote shutdown capability.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range (VIN) | 3.1 | - | 75 | V |
| Output Current Limit | 0.8 | 1.0 | 1.2 | A |
| MOSFET RDS(ON) | 490 | 800 | - | mΩ |
| Switching Frequency Range | 225 | 260 | 295 | kHz |
| Maximum Duty Cycle | 80% | 85% | 90% | - |
| Operating Junction Temperature | -40 | - | 125 | °C |
| Thermal Shutdown Temperature | - | - | 165 | °C |
| Package Types | - | - | SOIC (8), WSON (8) | - |
Key Features
- Integrated 75-V N-Channel MOSFET with 1-A peak current limit
- Ultra-wide input voltage range from 3.1 V to 75 V
- Current mode control with selectable compensation
- Adjustable output voltage with 1.5% accuracy
- Integrated high voltage bias regulator
- Integrated current sensing and limiting
- Integrated slope compensation
- Single resistor oscillator programming and oscillator synchronization capability
- Enable / undervoltage lockout (UVLO) pin and thermal shutdown
- Remote shutdown capability
Applications
The LM5001MAX is versatile and can be used in various applications, including:
- DC-DC power supplies for industrial, communications, and automotive systems
- Boost, flyback, SEPIC, and forward converter topologies
- Non-isolated and isolated flyback converters
- SEPIC converters, such as 24-V and 12-V automotive range SEPIC converters
Q & A
- What is the input voltage range of the LM5001MAX?
The input voltage range is from 3.1 V to 75 V. - What is the peak current limit of the LM5001MAX?
The peak current limit is 1 A. - What types of converters can the LM5001MAX be used for?
The LM5001MAX can be used for boost, flyback, SEPIC, and forward converters. - What is the typical switching frequency range of the LM5001MAX?
The typical switching frequency range is from 225 kHz to 295 kHz. - Does the LM5001MAX have thermal shutdown protection?
Yes, the LM5001MAX has thermal shutdown protection that activates at 165°C. - What are the package types available for the LM5001MAX?
The LM5001MAX is available in SOIC (8) and WSON (8) packages. - How is the switching frequency set in the LM5001MAX?
The switching frequency is set with a single resistor and can also be synchronized to an external clock. - What is the purpose of the slope compensation in the LM5001MAX?
Slope compensation is used to eliminate sub-harmonic current oscillation that occurs with static duty cycles greater than 50%. - Can the LM5001MAX be used in automotive applications?
Yes, the LM5001MAX is suitable for automotive applications due to its AEC-Q100 qualification. - What is the maximum duty cycle of the LM5001MAX?
The maximum duty cycle is 85%.
