Overview
The LM3488MMX from Texas Instruments is a versatile low-side N-FET high-performance controller designed for switching regulators. This device is suitable for use in topologies requiring low-side FET, such as boost, flyback, or SEPIC converters. The LM3488 is characterized by its ability to operate at extremely high switching frequencies, ranging from 100 kHz to 1 MHz, which helps in reducing the overall solution size. It features current mode control, providing superior bandwidth and transient response, along with cycle-by-cycle current limiting. The device includes built-in protections such as thermal shutdown, short-circuit protection, and overvoltage protection, ensuring reliable operation under various conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | 8-Lead VSSOP | |
| Operating Temperature Range | -40 to 125 | °C |
| Supply Voltage Range | 2.97 V to 40 V | V |
| Switching Frequency | 100 kHz to 1 MHz | Hz |
| Internal Reference Accuracy | ±1.5% (Overtemperature) | % |
| Peak Current Capability | 1 A | A |
| Shutdown Current | 5 µA | A |
| Thermal Shutdown | 165 °C | °C |
Key Features
- Automotive Grade Product, AEC-Q100 Qualified
- 8-Lead VSSOP Package
- Internal Push-Pull Driver With 1-A Peak Current Capability
- Current Limit and Thermal Shutdown
- Frequency Compensation Optimized With a Capacitor and a Resistor
- Internal Soft-Start
- Current Mode Operation
- Undervoltage Lockout With Hysteresis
- Adjustable and Synchronizable Clock Frequency
- Power-saving Shutdown Mode
Applications
- Automotive Start-Stop Applications
- Automotive ADAS and Driver Information Systems
- One Cell/Two Cell Li-ion Battery Powered Portable Bluetooth Audio Systems
- Notebooks, PDAs, Digital Cameras, and other Portable Applications
- Offline Power Supplies
- Set-Top Boxes
- Boost for Audio Amplifiers
Q & A
- What is the operating temperature range of the LM3488MMX?
The operating temperature range of the LM3488MMX is -40 to 125 °C. - What is the supply voltage range for the LM3488MMX?
The supply voltage range for the LM3488MMX is 2.97 V to 40 V. - How can the switching frequency of the LM3488MMX be adjusted?
The switching frequency can be adjusted using a single external resistor or by synchronizing it to an external clock. - What is the peak current capability of the LM3488MMX?
The peak current capability of the LM3488MMX is 1 A. - What are the built-in protection features of the LM3488MMX?
The LM3488MMX includes thermal shutdown, short-circuit protection, and overvoltage protection. - What is the shutdown current of the LM3488MMX?
The shutdown current of the LM3488MMX is 5 µA. - Is the LM3488MMX AEC-Q100 qualified?
Yes, the LM3488MMX is AEC-Q100 qualified. - What package type does the LM3488MMX come in?
The LM3488MMX comes in an 8-Lead VSSOP package. - What are some common applications of the LM3488MMX?
Common applications include automotive start-stop systems, ADAS, portable electronics, offline power supplies, and set-top boxes. - How does the internal soft-start feature work in the LM3488MMX?
The internal soft-start feature limits the inrush current at start-up, preventing excessive current spikes.
