Overview
The LM5001MA is a high-voltage switch-mode regulator produced by Texas Instruments. It is designed to implement efficient high-voltage Boost, Flyback, SEPIC, and Forward converters using a minimal number of external components. 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.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range | 3.1 | - | 75 | V |
| Peak Current Limit | 0.8 | 1.0 | 1.2 | A |
| Output Voltage Accuracy | - | 1.5% | - | % |
| Switching Frequency | 225 | 260 | 295 | kHz |
| Junction Temperature Range | -40 | - | 125 | °C |
| MOSFET On-Resistance | 490 | 800 | - | mΩ |
| Maximum Duty Cycle | 80% | 85% | 90% | % |
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 and 1.5% output voltage accuracy
- Programmable switching frequency up to 1.5 MHz
- Oscillator synchronization capability
- Integrated high voltage bias regulator and current sensing
- Thermal shutdown and undervoltage lockout protection
- AEC-Q100 Qualified for automotive applications
Applications
- DC-DC power supplies for industrial, communications, and automotive applications
- Boost, Flyback, SEPIC, and Forward converter topologies
- Non-isolated and isolated converter designs
- Automotive systems requiring high reliability and wide input voltage range
Q & A
- What is the input voltage range of the LM5001MA?
The input voltage range is from 3.1 V to 75 V.
- What is the peak current limit of the LM5001MA?
The peak current limit is 1 A.
- What is the output voltage accuracy of the LM5001MA?
The output voltage accuracy is 1.5%.
- Can the switching frequency of the LM5001MA be programmed?
Yes, the switching frequency can be programmed up to 1.5 MHz using a single resistor.
- Does the LM5001MA have thermal shutdown protection?
Yes, it has thermal shutdown protection that activates at 165°C and resets when the temperature drops by approximately 20°C.
- What types of converters can the LM5001MA support?
The LM5001MA supports Boost, Flyback, SEPIC, and Forward converter topologies.
- Is the LM5001MA AEC-Q100 Qualified?
Yes, the LM5001MA is AEC-Q100 Qualified for automotive applications.
- How is the oscillator synchronized in the LM5001MA?
The oscillator can be synchronized to an external clock using the RT pin.
- What is the maximum duty cycle of the LM5001MA?
The maximum duty cycle is 85%.
- Does the LM5001MA have undervoltage lockout (UVLO) protection?
Yes, it has UVLO protection to prevent operation with less than the minimum desired input voltage.
