Overview
The LM25118MHX/NOPB, produced by Texas Instruments, is a wide voltage range Buck-Boost switching regulator controller. This device is designed to implement high-performance, cost-efficient Buck-Boost regulators using a minimum of external components. The LM25118 operates in both buck and buck-boost modes, maintaining output voltage regulation whether the input voltage is less than or greater than the output voltage. This makes it particularly suitable for automotive and industrial applications where input voltage can vary widely. The controller features emulated peak current mode control, smooth transition between step-down and step-up modes, and programmable switching frequencies up to 500 kHz.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Operating Range | 3 V to 42 V | V |
| Switching Frequency | 50 kHz to 500 kHz | Hz |
| Package Type | 20-Pin HTSSOP (Exposed Pad) | - |
| Feedback Reference Accuracy | 1.5% | - |
| Thermal Shutdown Junction Temperature | 165 °C | °C |
| Ultra-Low Shutdown Current | - | - |
| Integrated High and Low-Side Gate Drivers | Yes | - |
| Oscillator Synchronization Capability | Yes | - |
| Programmable Soft-Start Time | Yes | - |
| Enable Input | Yes | - |
Key Features
- Emulated peak current mode control for reduced noise sensitivity and reliable control of small duty cycles.
- Smooth transition between step-down and step-up modes.
- Switching frequency programmable to 500 kHz.
- Oscillator synchronization capability for synchronizing multiple regulators.
- Internal high voltage bias regulator and integrated high and low-side gate drivers.
- Programmable soft-start time to prevent inrush current.
- Ultra-low shutdown current to minimize power consumption in standby mode.
- Enable input for external control of the regulator.
- Wide bandwidth error amplifier for precise voltage regulation.
- Thermal shutdown protection to prevent overheating.
Applications
The LM25118MHX/NOPB is particularly suited for applications where the input voltage can vary widely, such as:
- Automotive systems: Where the battery voltage can fluctuate significantly.
- Industrial power supplies: Where input voltage stability is crucial.
- Renewable energy systems: Such as solar or wind power systems where input voltage can be variable.
Q & A
- What is the input voltage operating range of the LM25118MHX/NOPB?
The input voltage operating range is from 3 V to 42 V.
- What is the maximum switching frequency of the LM25118MHX/NOPB?
The switching frequency can be programmed up to 500 kHz.
- Does the LM25118MHX/NOPB support oscillator synchronization?
Yes, it has an oscillator synchronization capability.
- What type of control method does the LM25118MHX/NOPB use?
The control method is based on emulated peak current mode control.
- What is the package type of the LM25118MHX/NOPB?
The package type is 20-Pin HTSSOP (Exposed Pad).
- Does the LM25118MHX/NOPB have integrated gate drivers?
Yes, it has integrated high and low-side gate drivers.
- What is the feedback reference accuracy of the LM25118MHX/NOPB?
The feedback reference accuracy is 1.5%.
- Does the LM25118MHX/NOPB have thermal shutdown protection?
Yes, it has thermal shutdown protection with a junction temperature threshold of 165 °C.
- Can the soft-start time of the LM25118MHX/NOPB be programmed?
Yes, the soft-start time is programmable.
- What is the purpose of the enable input on the LM25118MHX/NOPB?
The enable input allows for external control of the regulator, enabling or disabling it as needed.
