Overview
The LM3488MM from Texas Instruments is a versatile low-side N-FET high-performance controller designed for switching regulators. This device is particularly suited for topologies that require a low-side FET, such as boost, flyback, or SEPIC configurations. It is an automotive-grade product, AEC-Q100 qualified, making it reliable for use in automotive and other demanding applications. The LM3488MM operates at a wide supply voltage range and can be adjusted to high switching frequencies, reducing the overall solution size. It features current mode control, providing superior bandwidth and transient response, along with cycle-by-cycle current limiting and programmable output current.
Key Specifications
| Parameter | Specification |
|---|---|
| Package | 8-Lead VSSOP (DGK) |
| Operating Temperature Range | -40°C to 125°C |
| Supply Voltage Range | 2.97 V to 40 V |
| Switching Frequency | 100 kHz to 1 MHz (adjustable and synchronizable) |
| Internal Reference Accuracy | ±1.5% (overtemperature) |
| Shutdown Current | 5 µA (overtemperature) |
| Peak Current Capability | 1 A |
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
- Thermal Shutdown, Short-Circuit Protection, and Overvoltage Protection
- Power-Saving Shutdown Mode Reducing Total Supply Current to 5 µA
Applications
The LM3488MM is suitable for a variety of applications, particularly in automotive systems due to its AEC-Q100 qualification. It can be used in boost, flyback, or SEPIC topologies, making it versatile for different power supply designs. The device is also applicable in industrial and consumer electronics where high reliability and efficiency are required.
Q & A
- What is the operating temperature range of the LM3488MM?
The operating temperature range of the LM3488MM is -40°C to 125°C.
- What is the supply voltage range of the LM3488MM?
The supply voltage range of the LM3488MM is 2.97 V to 40 V.
- How can the switching frequency of the LM3488MM be adjusted?
The switching frequency of the LM3488MM can be adjusted from 100 kHz to 1 MHz using a single external resistor or by synchronizing it to an external clock.
- What is the peak current capability of the LM3488MM's internal push-pull driver?
The peak current capability of the LM3488MM's internal push-pull driver is 1 A.
- Does the LM3488MM have built-in protection features?
Yes, the LM3488MM has built-in features such as thermal shutdown, short-circuit protection, and overvoltage protection.
- How does the internal soft-start feature work?
The internal soft-start feature limits the inrush current at start-up, preventing excessive current spikes.
- What is the shutdown current of the LM3488MM?
The shutdown current of the LM3488MM is 5 µA (overtemperature).
- Is the LM3488MM suitable for automotive applications?
Yes, the LM3488MM is an automotive-grade product, AEC-Q100 qualified, making it suitable for automotive applications.
- Can the output current of the LM3488MM be programmed?
Yes, the output current of the LM3488MM can be programmed with a single external resistor.
- What type of control mode does the LM3488MM operate in?
The LM3488MM operates in current mode control, providing superior bandwidth and transient response.
