Overview
The LM5118MHX/NOPB from Texas Instruments is a wide voltage range Buck-Boost switching regulator controller designed for high-performance and cost-efficient applications. This controller features an ultra-wide input voltage range from 3 V to 75 V, making it particularly suitable for automotive and industrial environments. The LM5118 operates in both buck and buck-boost modes, ensuring output voltage regulation whether the input voltage is less than or greater than the output voltage. It transitions smoothly between these modes, maintaining optimal conversion efficiency and a glitch-free output.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 3 V to 75 V | V |
| Switching Frequency | Programmable to 500 KHz | Hz |
| Feedback Reference Accuracy | 1.5% | % |
| Shutdown Current | Ultra-Low | - |
| Thermal Shutdown | Yes | - |
| Package | 20-Pin HTSSOP (Exposed Pad) | - |
| Operating Junction Temperature | -40°C to +125°C | °C |
| High-Side Gate Driver Supply | Bootstrap operation | - |
| Peak HO Source Current | 2.2 A | A |
| Peak HO Sink Current | 3.5 A | A |
Key Features
- Ultra-wide input voltage range from 3 V to 75 V
- Emulated peak current mode control for reduced noise sensitivity
- Smooth transition between step-down and step-up modes
- Switching frequency programmable to 500 KHz
- Oscillator synchronization capability
- Internal high voltage bias regulator
- Integrated high and low-side gate drivers
- Programmable soft-start time
- Enable input wide bandwidth error amplifier
- Thermal shutdown and current limit protection
Applications
- Automotive applications, especially during cold-crank conditions
- Industrial Buck-Boost power supplies
- High-performance, cost-efficient power management systems
- Systems requiring wide input voltage range and high efficiency
Q & A
- What is the input voltage range of the LM5118MHX/NOPB?
The input voltage range is from 3 V to 75 V.
- What is the switching frequency of the LM5118MHX/NOPB?
The switching frequency is programmable to 500 KHz.
- What type of control method does the LM5118MHX/NOPB use?
The controller uses emulated peak current mode control.
- Does the LM5118MHX/NOPB have thermal shutdown protection?
Yes, it includes thermal shutdown protection.
- What is the package type of the LM5118MHX/NOPB?
The package type is 20-Pin HTSSOP (Exposed Pad).
- What are the key applications of the LM5118MHX/NOPB?
Key applications include automotive and industrial Buck-Boost power supplies.
- How does the LM5118MHX/NOPB transition between buck and buck-boost modes?
The controller transitions smoothly between step-down and step-up modes, maintaining output voltage regulation.
- Does the LM5118MHX/NOPB have integrated gate drivers?
Yes, it includes integrated high and low-side gate drivers.
- What is the feedback reference accuracy of the LM5118MHX/NOPB?
The feedback reference accuracy is 1.5%.
- Can the soft-start time of the LM5118MHX/NOPB be programmed?
Yes, the soft-start time is programmable.
